Maxon Shut-Off and Vent Valves General Purpose.ทอทรัพย์.com/Files/Name2... · 2021....

Bulletin 6100

Maxon Shut-Off and Vent ValvesGeneral Purpose

2.5" Series STO-ACPposition “R”

• Electrically actuated valves shut off gas or oil lines reliably.

• Normally open versions available for vent or process purge lines with Maxon's long-lasting metal-to-metal seating.

• Application flexibility provided with 3/8" through 6" diameter line sizes, Cv flowfactors up to 1230, and line pressures up to 600 PSIG.

• All Maxon top assembly enclosures meet approval sanctions:– NEMA 1, 3, 3S, 4, and 12; CSA 2, 4, and 5; Available with NEMA 4X trim (optional)

2.5" Series 808position "TO"

2" Series 5000-CPposition “L”

with stainless steel body

CORPORATION 201 East 18th Street, P.O. Box 2068, Muncie, Indiana, 47307-0068. Phone: (765) 284-3304. FAX: 765-286-8394

Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark.

Normally open or normally closed valves

4" Series 7000position “L”

• Sanctioned service valve approvals:– FM (Factory Mutual) sanctioned– UL (Underwriters Laboratories) sanctioned– CGA (Canadian Gas Association) sanctioned– IRI (Industrial Risk Insurers) approvable for block/bleed/vent systems– Contact your Maxon sales representative for international sanctions information

• Handles flowing fluid temperatures:– Rising stem bodies from -20°F (-28°C) to +140°F (+60°C)– Swinging gate bodies from -20°F (-28°C) to +550°F (+288°C)– Any ambient temperature from -20°F (-28°C) to +140°F (+60°C)

• Valve body connections designed to ANSI (American National Standards Institute)standards. ISO (International Standards Organization) standards also available.

• Various application requirements met with manual reset or automatic resetmotorized operators.

• Minimize line pressure drops with straight-through flow swinging gate or rising stem(guillotine action) valve bodies

4" Series 5000-SCPposition “L”

1.5" Series STO-Mposition “L”


Maxon Valves – large or small, gas or oil, open or closed

1" Series 23300 position "L"

1" Series 8730position "TO"

• Minimal field maintenance required.

• Positive visual indication of valve body position is provided by large two-coloropen-shut indicator.

• Bodies built for heavy duty industrial service of one-piece cast iron, cast steel orcast stainless steel.

• Installation piping convenience obtained from field rotatable top assemblies.

• Special operating features available in Special Service Packaged versions.

• Micro-lapped seating wears in, not out.

1" Series 760position “L”


Accessory Options

1" Series 25300 position “L”

with socket welded nipples & flanges

1.25" Series 808position “R”,

with wheel & chain assembly

Page 6104

• Positive indication of valve body position provided through:– Auxiliary SPDT and DPDT signal switches mounted inside valve top enclosure.– Proof-of-open and/or Proof-of-closed position switches.

• Built-in over travel valve body design meets requirements of insurance standards.

• External junction box requirement eliminated with built-in valve wiringcompartment and electrical terminal block.

• Manual reset valves may be mounted in overhead lines with use of wheel andchain option.

• Companion flange sets available to simplify installation.

1/99

CORPORATION 201 East 18th Street, P.O. Box 2068, Muncie, Indiana, 47307-0068. Phone: (765) 284-3304. FAX: 765-286-8394


Maxon Valves

Design Features and Operating Concepts

Valves with electro-mechanical actuatorsfor quick opening or closing action

1/99

Normally closed shut-off valves are used inburner system fuel supply lines on industrial boilers,furnaces, ovens, kilns, and other heating processes.All valves are designed to shut-off fuel automaticallyand instantly with any interruption in the electricpower supplied through your safety circuit.

These valves are also used for the manual ormotorized opening or closing of pipe lines carryinggases and liquids commonly used in industrial proc-esses. Normally closed valves cannot be opened untilthe interlocking safety control circuit is proven andresulting electrical power is supplied to the shut-offvalve.

Motorized automatic valve actuators are usedwhere remote access or unmanned applications areneeded.

NOTE: Valve motors are protected against thermaloverload. Normal duty cycles of 1 cycle per minute orless should allow motor thermal overload to suffi-ciently cool between cycles. If the normal valve dutycycle is exceeded, the motor must be allowed to coolbefore the thermal protection will automatically reset.

Manual reset actuators require operating person-nel to be physically present to actuate the valve fromits at rest position.

Normally open vent valves are most often usedas the bleed valve in a block-and-bleed pipe train,sometimes required by insurance authorities. Theyare designed to open a vent line automatically andinstantly upon any interruption in the electric powersupply through your safety control circuit.

These normally open valves are also used inprotective atmosphere systems and other gaseousand fluid service requiring quick opening or by-passpurging action.

Like the normally closed versions, both automaticand manual reset actuators are available for remoteaccess locations, or when operating personnel'sphysical presence is preferred.

All Maxon valves feature one-piece cast iron orcast steel bodies with micro-lapped seats and discs.Straight through flow path minimizes pressure dropthrough full open swinging gate or rising stem (guillo-tine action) bodies.


106 Maxon Valves

Valve Body Design Details

To provide seals in your process service lines, Maxon usestwo different styles of valve bodies:

Rising stem (guillotine action) bodies are frequently usedin normally closed and normally open gas valves. The micro-lapped, spring loaded guillotine disc gets a pressure assist fromthe flowing gases to seal against the downstream micro-lappedmetal seat ring. The carefully machined seal surfaces andextremely close tolerances of the valve body operating mecha-nism promote positive closing action. Frequent cycling actionconstantly shears accumulated dirt or residue from the disc andseat to insure instantaneous and reliable sealing.

The location of the port in the disc is the basic differencebetween normally open and normally closed valve bodies. Bothvalves function by the top assembly mechanism driving the stemand disc down into the valve body, opening (or closing) the flowpath. Both valves trip to their rest position when their topassembly's compression spring is released to pull the stem andconnected disc up out of the body.

Swinging gate bodies are frequently used in normally closedoil valves and for some non-combustible gas applications. Thisdesign provides the same seal capabilities, but in a slightlydifferent operating mode. The hard faced micro-lapped seat nutis threaded into the one-piece valve body. The free-floating, hardfaced, spring loaded circular disc swings across the seat. Linepressure also assists in sealing the disc to the downstream seat.

Here again, frequent use and cycling actually helps to keepyour valve clean. Since the free-floating disc is swinging acrossthe circular seat nut on the arc created by the disc carrier, thedisc rotates slightly on every cycle. This provides a fresh, cleansurface area for sealing off the flow lines.

Maxon valve bodies have special service trim optionsavailable to meet your particular fluid service requirements.Contact your Maxon representative for details.

Valve BodyAssembly

Valve BodyAssembly

Seat

Seat

Normally-ClosedDisc

Normally-OpenDisc

DiscCarrier

Disc


Maxon Valves

Valve Body Capacities/Specifications

2/00

Table 2: Normally open valve bodiesTable 1: Normally closed valve bodies

Each complete valve assembly must include one ofthese valve bodies, regardless of ultimate seriesdesignation.

Flows through the valve body and resulting pres-sure drops may be estimated by inserting yourspecific conditions into the following formula andusing C

v flow factors given for each valve body.

Gases: Q = (1360) x (Cv) x (P1+P2) (P1–P2)

G Tf 2

Liquids: V = (Cv) x (P1–P2)

Gf

Where:G = Gas specific gravity (air = 1.0)G

f= Specific gravity @ flowing temperature °F

P1

= Inlet pressure PSIA (14.7 psi + psi gauge)P

2= Outlet pressure PSIA (14.7 psi + psi gauge)

Q = Cubic feet per hour @ 14.7 PSIA and 60°FT

f= Flowing temperature absolute (460° + °F)

V = Flow in U.S. gallons/minute of water

x

NOTE: Typically, pressure drop for gas flows should notexceed 10% of inlet pressure; however, for 2" and smallervalves, the drop should not exceed 5 PSIG, and for 2.5" andlarger valves, must not exceed 2.5 PSIG.Select valve size on basis of the lower of these parametersto avoid critical flow conditions.

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Maxon Valves

Valve Body Capacitieswith Natural Gas at 5 inches w.c. Inlet Pressure

Approximate pressure dropsfor various valve sizes and flowsmay be determined by using thisgraph.

Typically, pressure drop forfuel flows should not exceed10% of inlet pressure.

Select valve size on basis ofthe lower of these parametersto avoid critical flow conditions.

.75 " & 1" RS

1.25" RS1.5" RS

20 Cv

45 Cv53 Cv

86 Cv

127 Cv173 Cv

304 Cv423 Cv490 Cv

500

5000

50000

0.2 0.3 0.4 0.5

719 Cv

2" RS

2.5" RS3" RS

2.5" CP RS3" CP RS4" CP RS

6" RS

4" HC

6" HC

1172 Cv

869 Cv


Maxon Valves

Valve Body Capacitieswith Natural Gas at 1 PSIG Inlet Pressure

1/99

Approximate pressuredrops for various valvesizes and flows may bedetermined by using thisgraph.

Typically, pressure dropfor fuel flows should notexceed 10% of inletpressure.

Select valve size onbasis of the lower of theseparameters to avoid criticalflow conditions.

.75 " & 1" RS1.25" RS1.5" RS2" RS2.5" RS3" RS

2.5" CP RS3" CP RS4" CP RS

20 Cv

45 Cv53 Cv

86 Cv127 Cv173 Cv

304 Cv423 Cv490 Cv

500

50000

500000

0.5 5

719 Cv

6" HC

5000

4" HC6" RS

869 Cv1172 Cv


Maxon Valves

Valve Body Capacitieswith Natural Gas at 5 PSIG Inlet Pressure

Approximate pressure dropsfor various valve sizes and flowsmay be determined by using thisgraph.

Typically, pressure drop forfuel flows should not exceed10% of inlet pressure; however,for 2" and smaller valves, thedrop should not exceed 5 PSIG,and for 2-1/2" and larger sizevalves, must not exceed 2.5PSIG.

Select valve size on basis ofthe lower of these parametersto avoid critical flow conditions.

5000

.75" & 1" R

S1.25" RS1.5" R

S2" R

S2.5" RS3" R

S2.5" C

P RS3" C

P RS4" C

P RS

20 Cv

45 Cv53 Cv86 Cv127 Cv173 Cv304 Cv423 Cv490 Cv

500

50000

500000

0.5 5 50

4" HC

719 Cv

6" HC

6" RS

1172 Cv

869 Cv


Maxon Valves

Valve Body Capacitieswith #2 Oil

1/99

To select a valve forYOUR application, useeither C

v factor calcula-

tions, or this graphshowing approximatepressure drop at variousflows of #2 oil.

Typically, pressuredrop for fuel flowsshould not exceed 10%of inlet pressure.

For preheated #5 or #6 oil, multiplythe required flow rate in GPH by thefactor given in the table at right, thenselect a valve based upon thatequivalent flow of #2 oil and theallowable drop.

Oil Grade #5 #6

°F @ Inlet 125 160 120 140 180 210 220

Factor 1.43 1.11 2.86 2.00 1.25 1.11 1.05

For example: To size for 5 PSIG drop with a 3500 GPH flow of #6 oilpreheated to 140°F, the multiplier is 2. Equivalent flow of #2 oil isthen 3500 x 2, or 7000 GPH. Chart shows that a 5 PSIG drop willrequire use of a valve body having a Cv factor of at least 45.


Maxon Valves

Selection DataNormally closed, swinging gate valves

Features:• Normally closed

• Electrically actuated

• Swinging gate body

• For shut-off service

• For liquid and non-combustible gas service

1" Series 760

Temperature LimitsAll of these valves can handle fluid temperatures from -20°F (-28°C) to

+250°F (+121°C). The Series 33000 valves are designed to handle higherfluid temperatures up to +450°F (+232°C) and even up to +550°F (+288°C)with addition (at extra charge) of special stem seals.

Ambient temperature limits vary. Any valve on this page using DCvoltage and all Series 8700 valves can handle ambient temperatures from-20°F (-28°C) to +125°F (+52°C). The other valves on this page handleambient temperatures from -20°F (-28°C) to +140°F (+60°C).

OperationAll of these electro-mechanical valves require a constant supply of

electrical energy to their holding solenoids inside the top assembly actua-tors. Once the solenoid is energized, the manual reset valve may beopened manually, or the automatic reset valve will automatically open. Anyinterruption of the electrical power to either of these valves causes animmediate trip of the valve to its normally closed position.

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Maxon Valves

Selection DataNormally closed, rising stem valves

2/00

Features:• Normally closed


• Rising stem body

• For shut-off service

4" Series 7000

Temperature LimitsAll these valves can handle fluid temperatures from -20°F (-28°C) to +140°F (+60°C).

Oil viscosity not to exceed 5000 SSU. Ambient temperature limits vary. Any valve onthis page using DC voltage and all Series 7000 valves can handle ambient temperaturesfrom -20°F (-28°C) to +125°F (+52°C). The other valves on this page handle ambienttemperatures from -20°F (-28°C) to +140°F (+60°C).

OperationAll of these electro-mechanical valves require a constant supply of electrical energy to

their holding device inside the top assembly actuators. (In Series 808 and 5000 valves,the device is a solenoid and Series 7000 valves use an electro-magnetic clutch.) Oncethat device is energized, the manual reset valve may be manually opened, or the auto-matic reset valve will automatically open. Any interruption of the electrical power to eitherof these valves causes an immediate trip of the valve to its normally closed position.

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Maxon Valves

Selection DataNormally open, rising stem valves

Features:• Normally open


• Rising stem body

• For vent and by-passservice

2.5" Series STO-ACP

Temperature LimitsAll these valves can handle fluid temperatures from -20°F (-28°C) to

+140°F (+60°C). Oil viscosity not to exceed 5000 SSU.Ambient temperature limits vary. Any valve on this page using DC

voltage can handle ambient temperatures from -20°F (-28°C) to +125°F(+52°C). The other valves on this page can handle ambient temperaturesfrom -20°F (-28°C) to +140°F (+60°C).Operation

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Maxon Valves

Rising Stem Body/Trim Specifications

All Maxon Rising Stem Gate Valves carry a two-part trim identification (for example, Trim 1-1).

The first digit (a 1, 2, 3, 4 or 5 before thehyphen) identifies valve body and bonnetmaterial as shown in Table 1 below.

The second digit (a 1, 2 or 3 after the hyphen)identifies the specific internals used, asdescribed in Tables 2, 3 and 4, and identified inthe sketches at right.

Internal trim -1 is normally suitable for cleanfuel gases (for example, natural gas, propane,butane, clean atmosphere gases).

Internal trim -2 may be required for cleangases that require Viton seals or such gases ascoke oven, refinery, town or off-gas.

Internal trim -3 is designed for more corrosiveenvironments such as digester gas, sour naturalgas and landfill gas. Contact Maxon with specificfuel analysis for prices and/or availability.

Normally closed and normally open threadedand flanged body versions are identical inmaterial specifications.

The drawing at right carries item numbersmatching those in Table 2. This information isfurnished for identification only, not for orderingparts.

WARNING: Do not attempt field repair of Maxon valvebody or electro-mechanical actuator. Any fieldalterations void all warranties.

1/99

Page 6115

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Maxon Valves

Rising Stem Body/Trim Specifications

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"2–"57. "3,"5.2 PC"4–"5.2 "6

3 taeS KEEP KEEP KEEP KEEP

4 csiD M8FC-153A M8FC-153A M8FC-153A M8FC-153A

5 gniRwolloF KEEP KEEP KEEP KEEP

6 gnir-OtaeS notiV notiV notiV notiV

7 gnir-OtennoB notiV notiV notiV notiV

8gnirpS-yvaW

rehsaWleetSsselniatS203# leetSsselniatS203# leetSsselniatS203# leetSsselniatS203#

9 metS 054motsuCretnepraC 054motsuCretnepraC 054motsuCretnepraC 054motsuCretnepraC

01 sniPcsiD/metS --- --- --- ---

11 sgnir-OmetS notiV notiV notiV notiV

21 etalPrekirtS leetSsselniatS7-71# leetSsselniatS7-71# leetSsselniatS7-71# leetSsselniatS7-71#

31 repmuB notiV notiV notiV notiV


Maxon Valves Page 6117

1/99

Swinging Gate Body/Trim Specifications

Trim identification of Maxon Swinging Gate Shut-Off Valves is two-part. The first digit before thehyphen is a number (1, 2, 3 or 4) identifying bodymaterial as shown in Table 1 below. The second digitafter the hyphen identifies a trim utilizing the materialsindicated in Table 2 below.

Standard sanctioned valves incorporating a castiron body will normally be identified by trim 1-B or1-D. Sanctioned valves with steel body will normallybe trim 2-D.

Non-sanctioned services or unusual applicationsmay require upgrading of internal trim. Contact Maxonwith specific fuel analysis for price and availability.

The drawings shown on the following page carryitem numbers matching those in Table 2. This infor-mation is furnished for identification only, not forordering parts.

WARNING: Do not attempt field repair of Maxon valvebody or electro-mechanical top actuator. Any fieldalterations void all warranties.

snoitacificepS)1metI(ydoB:1elbaT

noitpircseDydoB -1ydoB -2ydoB -3ydoB -4ydoB

lairetaM 03LC,0003G,norItsaC leetStsaC 03LC,0003G,norItsaC leetStsaC

cepSMTSA 951A BCW-612A 951A BCW-612A

gnitaoClaicepS --- --- detaoC-lekciNsselortcelE detaoC-lekciNsselortcelE

snoitacificepSlairetaMmirTlanretnI:2elbaT

metI.oN

traPnoitpircseD

sevlav"57.&"573.rof sevlav"52.1&"1roF sevlav"2&"5.1roF

D-:mirT N-:mirT B-:mirT D-:mirT N-:mirT B-:mirT D-:mirT

2elbaweneRrotuNxeH

taeSleetSdecaF-draH leetSdecaF-draH

htiwnorItsaCsselniatS024#gniRtaeSleetS

decaF-draHleetS

decaF-draHleetS

htiwnorItsaCsselniatS024#gniRtaeSleetS

decaF-draHleetS

3 gnihsuBmetS leetSdetalP-cniZ leetSdetalP-cniZdetalP-cniZ

leetSdetalP-cniZ

leetSdetalP-cniZ

leetSsselniatS614#

leetSsselniatS614#

leetS

4 metS sselniatS614#leetS

sselniatS614#leetS

sselniatS614#leetS

sselniatS614#leetS

sselniatS614#leetS

sselniatS614#leetS

sselniatS614#leetS

5 gnirpSmetS sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

6 reirraCcsiD leetSxodeN/wleetS

gnitaocleetS leetS

xodeN/wleetSgnitaoc

leetS leetS

7 csiD leetSdecaF-draH leetSdecaF-draH norIraludoNdecaF-draH

leetSdecaF-draH

leetSnorIraludoN

decaF-draHleetS

8 sgniR-OmetS nirdyH nirdyH notiV notiV notiV notiV notiV

9 gnirpScsiD sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

sselniatS203#leetS

01 gniRtsurhTmetSrennI nolfeT nolfeT nolfeT nolfeT nolfeT liofarG nolfeT

11 sgniR-Opu-kcaB nolfeT nolfeT nolfeT nolfeT nolfeT --- ---

21 steksaGydoB norItfoS norItfoS norItfoS norItfoS norItfoS norItfoS norItfoS

31 teksaGgnihsuBmetS norItfoS norItfoS norItfoS norItfoS norItfoS norItfoS norItfoS

41 gniR-OydoB notiV notiV notiV notiV notiV --- ---

51 gniRgnikcaPmetS liofarG liofarG --- --- --- --- ---

61 tuNgnikcaP leetSdetalP-cniZ leetSdetalP-cniZ --- --- --- --- ---

71 egnalFteltuO --- --- --- --- ---saemas(leetS)lairetamydob

saemas(leetS)lairetamydob


Maxon Valves

Swinging Gate Body/Trim Specifications

Typical construction of1" through 2" screwed body valves

Typical construction of.375" through .75" screwed body valves

Typical construction of1.5" through 2" flanged body valves


Maxon Valves

1/99

Component Identification

General Maintenance and Spare Parts

All safety devices should be tested at leastmonthly* and more often if deemed advisable.Periodic testing for tightness of manual or motor-ized shut-off valve closure is equally essential.

*per NFPA 86-Appendix B-4 (1995)

These Maxon valves are designed for long trouble-free service. Only items shown as suggested spareparts are considered field replaceable.

WARNING: Do not attempt field repair of valvebody, top assembly or motor drive unit. Anyalterations void all warranties.

To determine suggested spare parts, identifyseries designation and serial number from the valve’snameplate. Refer to the illustration and legend belowto identify suggested spare parts.

To order, specify:1. Quantity2. Assembly part number (if available)3. Description4. Electrical specification5. Full nameplate information (from existing valve)

Automatic ResetManual ResetNote: Drawings are illustrative only. Actual valves may vary slightly.

Series 808Series 5000

Series 7000

Series 8700

Legend:1 – Nameplate2 – Solenoid3 – VOS motor limit/signal

switch for normally closedvalve; VCS for normallyopen valve

4 – Printed Circuit Board(PCB)

Nameplate(typical)

Series 808-CP

Nameplatedesignation doesnot reflect externalaccessory items ormotor limit switch

(shown for listedvalves; otherssimilar)

Normally closed valve designation

3" 5000-S CP D 2

VCS Used *DC Solenoid (if used)

CP Body (if used)Steel Body (if used)

Valve SeriesValve Size (NPT)

*Signal Switch legend:0 No Switch 2 VCS-2 Switch1 VCS-1 Switch 2H VCS-2 (Herm. Sealed)

1H VCS-1 (Herm. Sealed)

Normally open valve designation

3" STO-AS CP D 2

VOS Used *DC Solenoid (if used)

CP Body (if applicable)Steel Body (if used)

Valve SeriesValve Size (NPT)

*Signal Switch legend:0 No Switch 2 VOS-2 Switch1 VOS-1 Switch 2H VOS-2 (Herm. Sealed)

1H VOS-1 (Herm. Sealed)

3

21

2 3

1

2

NCNCCOMCOM#1 BLACK TO#1 BLACK TO

#3 BLACK TO#3 BLACK TO

BLACK TO MOTORBLACK TO MOTOR

TERMINAL #1TERMINAL #1

TERMINAL #3TERMINAL #3

NONO

12

1212 1111 1010 9 8 7 6 5 4 3 2 1

TO CLUTCHTO CLUTCH

4

SHUTSHUT

4


Maxon Valves

Electrical Datafor normally closed valves

Diagrams show valve in its normally closed (at rest)position. The indicated internal wiring is present onlywhen the appropriate auxiliary switches are specified.Automatic reset valves always include a VOS-1 SPDTvalve open motor limit switch.

Good practice normally dictates that auxiliaryswitches in valves used for safety shut-off functionsshould be used for signal duty only, not to operateadditional safety devices.

Signal switch designations:VCS (Valve Closed Switch) is actuated at the end

of the closing stroke. VCS-1 is SPDT; VCS-2 isDPDT.

VOS (Valve Open Switch) is actuated at the end ofthe opening stroke. VOS-1 is SPDT; VOS-2 is DPDT.

Switch amp ratings are shown on the schematicwiring diagrams on page 6122. DO NOT EXCEEDrated amperage or total load shown.

GeneralAll Maxon shut-off valves are electrically actuated

from a power source, normally through the flamesafeguard and/or safety control circuits.

Standard valve assemblies include an internalholding solenoid or printed circuit board for 115 volt60 hertz AC power. (Other electrical current optionsare available upon request.)

Series 808, 730, 760, 5000, 4730, and 4760 valveshave the internal solenoid. Series 8700 and 7000valves incorporate the printed circuit board.

The solenoid (or the printed circuit board) isenergized whenever the valve is powered. The motoroperator on automatic reset versions is powered onlyduring the opening stroke.

Switch wiring diagrams (reproduced on the nextpage) are part of each valve assembly, summarizingelectrical data and wiring for a valve equipped withterminal block and a full complement of optionalsignal switches.

NOTE: The VA rating shown in the DC column is based on an AC motor, DC solenoid.

teseRlaunaM:sgnitaR)AV(erepmAtloVevlaV noitarepOCA noitarepOCD

eziS seireS gninepO gnidloH gninepO gnidloH

"3–"57. )S-(818,808

22 2241 41

"52.1–"1 )S-(097,067,037

"2–"5.1 00332

"52.1–"1 )S-(09733

"4–"5.2 )S-(PC-818,PC-80843 43

"6 )S-(818,808 61 61

teseRcitamotuA:sgnitaR)AV(erepmAtloVevlaV noitarepOCA )zH06,CAV511( noitarepOCD )CDV42(

eziS seireS gninepO gnidloH gninepO gnidloH

"3–"57. )S-(0015,0005 ]1[022 22 212 41

"52.1–"1 )S-(0974,0674,0374 ]1[022 22 212 41

"2–"5.1 00352 ]1[022 22 212 41

"52.1–"1 97433 ]1[022 22 212 41

"4–"5.2 )S-(PC-0015,PC-0005 ]2[232 43 412 61

"6–"4 )S-(0017,0007 673 8 ]3[824 ]3[8

"57.–"573. )S-(0978,0678,0378 341 5 --- ---

243signitarAV,rewopztreh05fi;ztreh06rofsinwohsAV022]1[453signitarAV,rewopztreh05fi;ztreh06rofsinwohsAV232]2[

CDV021nodesaB]3[


11/02

Maxon Valves

Electrical Datafor normally closed valves

Manual Reset Series:.75" – 3" Series 808, 818 (-S);1" – 1.25" Series 730, 760, 790 (-S);1" – 1.25" Series 33790 (-S);2.5" – 4" Series 808-CP, 818-CP (-S);6" Series 808, 818 (-S)

Automatic Reset Series:.75" – 3" Series 5000, 5100 (-S);1" – 1.25" Series 4730, 4760, 4790 (-S);1" – 1.25" Series 33479;2.5" – 4" Series 5000-CP, 5100-CP (-S)

4"– 6" Series 7000, 7100 (-S)

.375" through .75"Series 8730, 8760,and 8790 (-S)


Maxon Valves

Electrical Datafor normally open valves

Signal switch designations:VCS (Valve Closed Switch) is actuated at the end

of the closing stroke. VCS-1 is SPDT; VCS-2 isDPDT.

VOS (Valve Open Switch) is actuated at the end ofopening stroke. VOS-1 is SPDT; VOS-2 is DPDT.

Switch amp ratings are shown on the schematicwiring diagrams below and on the next page. DONOT EXCEED rated amperage or total load shown.

GeneralAll Maxon normally open vent valves are electri-

cally actuated from a power source, normally throughthe flame safeguard and/or safety control circuits.

Standard valve assemblies include an internalholding solenoid for 115 volt 60 hertz AC power.(Other electrical current options are available uponrequest.)

The solenoid is energized whenever the valve ispowered. The motor operator on automatic resetversion is powered only during the closing stroke.

Switch wiring diagrams (reproduced below and onnext page) are part of each valve assembly, summa-rizing electrical data and wiring for a valve equippedwith terminal block and a full complement of optionalsignal switches.

Diagrams show valve in its normally open (at rest)position. The indicated internal wiring is present onlywhen the appropriate auxiliary switches are specified.Automatic reset valves always include a VCS-1 SPDTvalve closed motor limit switch.

Good practice normally dictates that auxiliaryswitches in valves used for safety shut-off functionsshould be used for signal duty only, not to operateadditional safety devices.

The VA rating shown in the DC column is based onan AC motor, DC solenoid.

.75" – 2" Series STO-M and STO-A (-S)2.5" – 4" Series STO-M-CP and STO-A-CP (-S)

sgnitaR)AV(erepmAtloV

evlaV noitarepOCA noitarepOCD

eziS seireS gnisolC gnidloH gnisolC gnidloH

"3–"57. M-OTS 22 22 41 41

"4–"5.2 PCM-OTS 43 43 41 41

"3–"57. A-OTS ]1[022 22 212 41

"4–"5.2 PCA-OTS ]2[232 43 412 61

243siAVneht,ztreh05fi;ztreh06rofsiAV022]1[453siAVneht,ztreh05fi;ztreh06rofsiAV232]2[

VOS-2VOS-1VCS-2VCS-11-3 4-5 4-6 7-8 7-9 7-8 7-9 10-11 10-121-3

FULLY OPEN

FULLY SHUT

INTERMEDIATE

VALVEMODE

VALVE WIRING DIAGRAM

VOS-2VOS-1VCS-2VCS-1

1 2 3 4 5 6 7 8 9 10 11 12

SWITCH CONTACT POSITIONSSHOWN WITH VALVE OPEN

SPDT SPDTHERMETICALLY SEALED

SPDTHERMETICALLY SEALED

SPDT

DPDTGENERAL PURPOSE

DPDTGENERAL PURPOSE

L2-NL1-HAC-POWERSEE NAME PLATE FOR VOLTAGE AND HZ

P/N 26379M

FIELDWIRING

INTERNALWIRING

OPTIONALD.C. POWER

SUPPLY

SOLENOID

H(+) N(-)

WARNING!VALVE

MUST BEWIRED AS

SHOWN

SPDT125 VAC - 15 AMP250 VAC - 15 AMP125 VDC - 0.5 AMP250 VDC - 0.25 AMP

DPDT125 VAC - 10 AMP250 VAC - 10 AMP125 VDC - 0.3 AMP

GENERAL PURPOSE

250 VDC - 0.15 AMP

HAZARDOUS LOCATIONSPDT

28 VDC - 5 AMP125 VAC - 1 AMP

SWITCH RATINGSTotal connected load not to exceed 1700 VA

ALL NI VALVES INCLUDEHERMETICALLY SEALEDSWITCHES, SUITABLE FORHAZARDOUS LOCATIONSCLASS I, DIV. 2, ABCDCLASS II, DIV. 2, FGCLASS III, DIV. 2

MOTORIZED VALVE ONLY

MTR


Maxon Valves

Dimensions (in Inches)

808, 5000, STO-A, STO-M

10/02

.75" through 1.5" valves with rising stem bodies

“R” “L”

“AW” “TO”

5.5 1.87

2.3

B

J

K

2.0

7.34

3.49

D

Pipe Size

(2) 1/4" NPTFTest Connection

CH

A

G

(2) 3/4" NPTConduitConnection

11.57.13

5.44 1.87

9.17

2.33

J

R B

3.5 4.5

D

2.0

G

A

HC

Pipe Size


(2) 3/4" NPTConduit Connection

5000 & STO-A

808 & STO-M

AvailableTop Assembly

Positions

epiPeziS

evlaVseireS

A B C D G H J K R

"57.M-OTS&808

00.2 52.21 18.3 09.1 87. 49.1 18. 11.8

85.11

A-OTS&0005 ---

"1)S-(M-OTS&)S-(808 85.11

)S-(A-OTS&)S-(0005 ---

"52.1808

44.2 18.21

00.4 00.2

22.

21.2

65.1 76.841.21

0005 ---

"5.1)S-(M-OTS&)S-(808

96.2 13.31 83. 86.1 41.916.21

)S-(A-OTS&)S-(0005 ---

NOTE: 2.75" neededfor terminal blockcover removal.


Maxon Valves


808, 5000, STO-A, STO-M

2" through 3" valves with rising stem bodies

“R” “L”

“AW” “TO”

2.382.97.61

BK

J

J

L

M NPEqually spaced

7.51

3.51.97

DG

A

HC

S

G

A

HT

Pipe Size

(2) 1/4" NPTTest Connection


13.128.557.61 2.73

2.38

K

J

R B

1.97 5.63

DG

A

HC

Pipe Size

808 & STO-M

5000 & STO-A AvailableTop Assembly

Positions

epiPeziS

evlaVseireS

A B C D G H J K L M N P R S T

"2)S-(M-OTS&)S-(808

52.3 57.41

83.4 91.2

44. 52.2 88.1 6.01

--- --- --- ---

83.41

--- ---)S-(A-OTS&)S-(0005

F"2)S-(M-OTS&)S-(808

--- --- 10.3 83.2 57. 4 05.3 0.7)S-(A-OTS&)S-(0005

"5.2808

05.326.41

0.5 5.2

36.

21.2 52.264.01

--- --- --- ---52.41

--- ---0005

---F"5.2 0005&808 --- --- --- 5.2 0.2 5.3 57.2 57. 4 57.3 5.7

"3 0005&808 49.2 68.41 91.5 95.2 21.2 65.2 17.01 --- --- --- --- --- ---



A

L

M N (dia.)

P (no. of holes)Equally spaced

A

HT


Pipe Size

S

15.1210.94

8.87 2.83

R

6.09

3.0

0.88

A

7.25

J11.68

A

View A-A(2) 3/4" NPT ConduitConnection

5.74.2

B

G

A

HC

D

Pipe Size


8.87 2.83

6.07

3.0

0.8811.68 J

7.25


View A-A

AA

7.514.2

B

G

A

HC

D


Page 6125Maxon Valves


808-CP, 5000-CP, STO-MCP, STO-ACP

10/02

2.5" CP through 4" CP and 6" valves with rising stem bodies

“R” “L”

“AW” “TO”

AvailableTop Assembly

Positions

Series 808 (-CP) & STO-M (-CP)

Series 5000 (-CP) & STO-A (-CP)

epiPeziS

evlaVseireS

A B C D G H J L M N P R S T

PC"5.2)PCS-(808

13.4

65.41

0.5 5.2 05.

21.2

52.2 --- --- --- ---65.41

--- ---)PCS-(A-OTS,)PCS-(0005 ---

F"5.2PC

)PCS-(8085.4 --- --- --- 2.2 5.3 57.2 57. 4

65.4157.3 5.7

)PCS-(A-OTS,)PCS-(0005 ---

"3PC

)PCS-(808

21.5

92.51

5.5 57.2 26. 21.2 65.2 --- --- --- ---

79.71

--- ---PCA-OTS,PC-0005 ---

)PCS-(A-OTS,)PCS-(0005 79.71

F"3PC

)PCS-(80822.5

--- --- ---

42.2 6.2 57.3 0.3

57.

479.71

0.4 0.8)PCS-(A-OTS,)PCS-(0005 ---

F"4PC

)PCS-(80855.5 52.2 65.2 5.4 57.3 8

79.715.4 0.9

)PCS-(A-OTS,)PCS-(0005 ---

"6 808 5.7 57.02 --- --- --- 83.3 --- 5.5 57.4 88. 8 34.32 52.5 5.01



Maxon Valves


4" & 6" 7000 Valves

8.63 3.87

P

R

3.25

E 4.56

G


S (dia.)8 holesequally spaced

(2) 3/4" NPTConduit Connection

H

Pipe Size

A

B

“R” “L” “TO” “AW”

Available Top Assembly Positions

eziSevlaV seireSevlaV A B E G H P R S

"4 )S-(0017&)S-(0007 13.7 88.32 91.4 5.4 9 5.4 57.3 57.0

"6 )S-(0017&)S-(0007 83.8 52 18.5 52.5 5.01 5.5 57.4 88.0


2.9

P

RS (dia. of holes)

T (no. of holes)J

13.148.79

C D

N

Pipe Size

E F

K

A

HG

2.9

P

R S (dia. of holes)

T (no. of holes)

7.59C D

J

K

A

HG

Pipe Size

E 8.75

3/4" Conduit Connection

Pipe Size

2.30 (for .375")

1.69 (for .5" & .75")

1.19

11.06

6.22 2.72 6.42 3.93

2.933.18

Page 6127Maxon Valves


8700, 23300, 25300

10/02

.375" through 2" valves with swinging gate bodies

Series 8730, 8760, 8790 & 8790-S (.375", .5" & .75")

Series 23300 & 25300 (1.5" & 2")

“L” “R”

“TO” “AW”

Available Top Assembly Positionsfor Series 23300 & 25300

eziSevlaV seireSevlaV A C D E F G H J K N P R S T

"5.1 00352&00332 60.326.7 83.2 5.3 26.5

44.2 44.1127.2

00.81 00.81 60.3 52.2 88.0 4

"2 00352&00332 52.3 96.2 49.11 73.81 73.81 52.3 5.2 57.0 8

Note: Series 8700 valves areavailable in top assembly positions"R" and "TO" only.



Maxon Valves


4700, 700, 33479, 33790

1" & 1.25" valves with swinging gate bodies

1" & 1.25" Series 700, 4700 1" & 1.25" Series 33790, 33479

Available Top Assembly Positions

"L" "R" "TO" "AW"

eziSevlaV seireSevlaV B C D E G H

"1

S-097&097,067,03735.31

26.7 83.2 5.3 49.1

21.4S-0974&0974,0674,0374

97433&09733 ---

"52.1

S-097&097,067,03735.31

91.4S-0974&0974,0674,0374

97433&09733 ---


2.77

1.44 1.44G

H

C D

8.8213.14

16.2816.08

E 5.7

Pipe Size

3/4"ConduitConn.

2.77

1.44

3/4" ConduitConnection

16.28

2.94

DC7.63

B

HG

Pipe Size

7.56E


Maxon Valves

1/99

Auxiliary Signal Switches

All Maxon valves may be equipped with internally-mounted signal switch(es) to provide a “proof-of-open” or “proof-of-closure” valve position indication.

Auxiliary signal switches indicate when valve is openor closed and are normally connected electrically intoyour control panel lights or warning device circuit(s).

For normally-closed valves:VCS (Valve Closed Switch) is actuated when valve

is fully shut. It is the upper, inverted snap-switchmounted on rear of switch bracket. VCS-1 is an SPDT(single-pole, double-throw) switch. VCS-2 is a DPDT(double-pole, double-throw) switch. All contacts areavailable for external circuitry.

VOS (Valve Open Switch) is actuated when valvereaches full-open. It is the lower snap-switch mounted

on front of switch bracket. VOS-1 is an SPDT switch.On automatic reset valves, its normally closed contactserves as a motor limit switch and is not available forexternal circuitry. On manual reset valves, normallyclosed contact is available for external circuitry, but isnot wired to optional terminal block. VOS-2 is DPDT,used in lieu of VOS-1 for additional contacts.

Photos above of normally-closed valve(typical for Series 730, 760, 790, 808, 818, 5000, 5100, 4730, 4760, 4790)

Valve Open Valve Shut

VOS(VOS-2 shown)

VOS wands

VOS actuator

VCS actuator

VCS actuatorVOS actuator

VCS wand

VCS(VCS-2 shown)


Maxon Valves

Auxiliary Signal Switches

For normally-open valves:VOS (Valve Open Switch) is actuated when valve

is fully open. It is the upper, inverted snap-switchmounted on rear of switch bracket. VOS-1 is an SPDT(single-pole, double-throw) switch. VOS-2 is a DPDT(double-pole, double-throw) switch. All contacts areavailable for external circuitry.

VCS (Valve Closed Switch) is actuated when valvereaches fully-closed. It is the lower snap-switch

mounted on front of switch bracket. VCS-1 is anSPDT switch. On automatic reset valves, its normallyclosed contact serves as a motor limit switch and isnot available for external circuitry. On manual resetvalves, normally closed contact is available forexternal circuitry, but is not wired to optional terminalblock. VCS-2 is DPDT, used in lieu of VCS-1 foradditional contacts.

Valve Shut Valve Open

Photos above of normally-open valve(typical for Series STO-MCP (-S), STO-ACP (-S)

All Maxon proof-of-open andproof-of-closure signalswitches work in a similarmanner; but due to differentstyles and types of top assem-bly housings, the switchesappear in slightly differentpositions in the various types ofvalves. Illustrated below arerepresentative top housings for4" – 6" Series 7000 (Fig. 3) and.375" – .75" Series 8700 (Fig.4) valves. Switch locations arenoted on sketches.

Fig. 3 Fig. 4

VOS(VOS-2 shown)

VOS wand

VCS actuator

VOS actuator

VCS actuatorVCS wand

VCS(VCS-2 shown)


1/99

Maxon Valve Accessories Page 6131

Tandem Arrangements(for simultaneous opening of main and blocking valves)

GeneralWherever insurance underwriters or other regula-

tory groups require the use of a double-valve or"block-and-bleed" system, but manual operation ispreferred to the use of automatic reset valves, opera-tion can be simplified by adding a tandem arrange-ment to a pair of Maxon manual reset shut-off valves.

A linkage overtravel spring in the tandem arrange-ment latches the blocking valve just before the mainvalve is latched, assuring latching of both valves.

If it is necessary to locate a tandem valve abovearms reach, an overhead wheel and chain assemblymay be added which includes a loop of chain acces-sible to operating personnel.

To orderValves are to be specified in the usual manner and

must be in top assembly position TO or AW.VOS and VCS switches must be included on the

main valve and a VOS switch on the blocking valve topermit electrical connection as shown in the wiringschematic illustrated at right.

If overhead wheel and chain assembly is alsorequired, specify loop length to reach appropriateoperating position. Extra chain (in one foot incre-ments) may be specified.

Center line distance between valves must be withinthe ranges indicated in Table 1 and shown in sketchbelow and must be specified at the time of order.

Wiring Schematic

FlameSafeguard

Contact

VCS inMain Valve

VOS inMain Valve

VOS inBlocking Valve

Main Valve(Normally Closed)

Blocking Valve(Normally Closed)

Vent Valve(Normally Open)

Main FuelPanel Light

.tgrrAmednaTrofgnicapSevlaVelbawollA:1elbaT

eziSevlaV C-CmuminiM C-CmumixaM

"5.1–"57. "81 "42

"3–"2 "02 "72

"6&"4 "72 "33

Tandem Arrangement withOverhead Wheel & Chain Tandem Arrangement

BlockingValve

TensionSpring

Piping by othersFlow

Specify loop lengthif overhead

wheel &chain option

TensionSpring

Piping by othersFlow

BlockingValve

See Table 1above

For Illustration Only(not a wiring diagram)For Illustration Only

(not a wiring diagram)

Wiring Schematic

FlameSafeguard

Contact

VCS inMain Valve

VOS inMain Valve

VOS inBlocking Valve

Main Valve(Normally Closed)

Blocking Valve(Normally Closed)

Vent Valve(Normally Open)

Main FuelPanel Light

Main valve and blocking valve wired in parallel.VCS Switch on main valve powers vent valve.VOS Switches on main and blocking valveswired in series to signal light.


Maxon Valves

Overhead Wheel & Chain Assembly

Overhead wheel and chain assembly allowsoperation of a manual reset valve in an otherwiseinaccessible overhead location. A wheel is mountedonto the handle of the valve. The attached chain isweighted on one end and has a paddle handgrip onthe other.

Once the valve is electrically energized, pullingdown on the paddle will open normally closed ver-sions or close normally open versions.

Maxon valve's free-handle design permits valve totrip to its rest position on any power interruption.

Wheel and chain assembly includes a length ofchain to position the paddle handgrip slightly belowpipe centerline. A standard length of 7 feet of chain isincluded with CP and larger valve sizes and 5 feet isincluded with all other valves. Extra chain (in one footincrements) may be specified to fit your specificlocation.

NOTE: Overhead wheel & chain can only be mountedon swinging gate valves with the top assemblyposition TO.

Approximate envelope dimensions (nominal, in inches)

Swinging gate valves Rising stem valves

2.31 dia.

12.19 Maximum

6.94

4.06

7.25

12.19Maximum

5.25Maximum


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