Efco Repair Recommendations

Maintenance and repair of valves and valveson site and in the workshop

There are various reasons why repairing valves provides many benefits, since

repair costs run to 5 35 % of the procurement price of replacement valves

it is too expensive to keep capital tied up in maintaining stocks of all replacement

the delivery times for replacement valves can be extremely long, causing major,expensive production problems

repairing welded-in valves on site is much faster than removing the insulation material from the valves cutting out the valves from the pipeline system taking the valves to the workshop welding a replacement valve into the system after preparing the pipe ends (if no replacement valve is available) repairing the valve, which is carried out either

by an external company in our own workshop or the external company's workshop,including welding the valve back in again. These processes also include thesubsequent checking of the welded joints and installing the insulation.

The time taken to repair large high pressure valves may be days or even weeks. However,repairing the valves on site reduces the time necessary to a few hours or days, as shown inthe following example:

Depending on the nature of the damage, a DN 200 300 mm high pressure slide valve canbe repaired on site within 1 -3 days. The repair of the same fault in workshop would take 3 - 4weeks. In an electrical power station with approx. 300 MW and an average power price of0.10 DM/kWh the cost of lost production would be 30,000 DM/hour, representing a daily lossof 720,000 DM, and a loss of 7,200.000 DM over ten days.

2HOW TO PROCEED

Preventive measures are extremely important for well-organised valve maintenance; thismeans regular checking of the condition of the valves (quality of sealing, tightness of closedvalve). Valve failure / leakage can cause considerable loss of medium and can represent amajor environmental hazard or even lead to catastrophe if toxic gas escapes (SEVESO inItaly, BHOPAL in India).

Our machines and equipment are designed for repairing damage to the sealing surfaces invalves.It is extremely important to act as soon as the first signs of leakage appear, because evenrelatively small damage to the sealing surface can quickly develop into a major leakage,which may then require comprehensive and expensive repairs.

There are two ways of maintaining valves:

A. On-site repair, particularly for valves welded into pipelines, which, in most cases, is acheaper solution

B. Workshop repair (partial or total repair), which is more expensive

Our comprehensive range of machines (services) covers both requirements in full.

zu A. On-site repair

1.

For globe valves (with small to medium damage tothe sealing surface) with a nominal diameter of DN 8 -150 mm we use our VALVA S1 machine (VALVAS05 for valves up to DN 50).This machine is driven by an electric or compressedair motor. The machines are guided by hand.

3Hardened and lapped steel grinding disks are usedas tools, which are fitted with 80 - 500 grain self-adhesive grinding paper.It is our experience that the grinding with abrasivepaper in grain 500 during the last working step resultsin a surface finish which makes it unnecessary to lapthe surface.For larger valves with a nominal diameter of up to DN300 mm (12") the VALVA S15, DN 80 - 300 mm (3" -12") is used.This machine operates in the same way as theVALVA S1.

If the sealing surfaces need to be lapped, we use ourVALVA 1 machine, DN 8 - 150 mm. With this machine itis possible to switch the spindle from the usual circularmovement to an oscillating movement for lapping (DN 8100 mm).The machine can be mounted on a special machinestand for carrying out this particular work.

Disks made from grey cast iron are used for lapping. EFCOBOR lapping paste with differentgrain sizes is used as the lapping medium. Generally lapping takes considerably more timethan grinding.

If lapping of valves from DN 100 mm up to DN 300 mm isrequired, we use the VALVA 15 machine. A VALVA 15must always be firmly attached to the valve housing.Thismachine works in the same way as the VALVA S15, butusing planet wheels and a fixed stand or a special 3-jawchuck.

4For valves with a nominal diameter of DN 200 to DN 600 mm (8" - 24") the VALVA 2machine is used, and for valves with a nominal diameter of up to DN 1600 mm we use theDN 500 - 1600 mm (20" - 64") VALVA 3 machine.

Planet wheels are used as the tools for both machines, on which planet arms with 50, 80 and 120 grinding and lapping spindles are mounted.Here too the grinding spindles have self-adhesive grinding paper rings with various grainsizes attached to them. Oil-thinned lapping pasted with various grain sizes is used with thelapping spindles.When the planet wheels rotate, due to the friction between the surface machined and the(ball bearing-guided) grinding or lapping spindles rotate around their axis. This producesan optimum cross-grind and keeps the sealing surface even.Both machines must be firmly attached to the valve housing during operation.

52.

Globe valves with major damage to the sealing surface

In cases where the entire sealing surface is being replaced(build-up welding) and the damage to the base material isonly slight, our high speed grinding machines are used.These are firmly attached to the valve housing.

These are the EFCO machines:

VSA 05 Nominal diameter f 20 mm - 150 mm (3/4 - 6)VSA 1 Nominal diameter f 50 mm - 400 mm (2 - 16)VSA 2 Nominal diameter f 250 mm - 800 mm (10 - 32)VSA 3 Nominal diameter f 500 mm - 1500 mm (20 - 60)

All VSA machines are compressed air-driven and are alsosuitable for grinding conical surfaces in valve housings.

Various grinding tools are available:

Face wheels made from silicon carbide or special fusedalumina

Face wheels with adhesive grinding paper attached

EFCO-GSS grinding discs (galvanicaly bonded CBN)

Grinding cone with grinding paper sleeves

6All machines can be fitted with a bore grinding device (see diagram) for grinding cylindricalsurfaces, particularly in high pressure slide valve housings.

In many gate valve housings the cylindricalsurface (3) that is used for axial sealing (so-calledsiding lock) gets damaged. This surface can berepaired in various ways. Small damage can beground off using the high-speed VSA machinewith the auxiliary device for the automatic grindingof cylindrical holes. If the damage is extremelydeep, the entire surface (3) must first be turned,(ground), then welded on, annealed and the newsealing surface turned (ground) to the requiredsize.

7The EFCO-TD machines developed for this purpose feature the fully automatic axial andradial feed. As desired electric or / and pneumatic drive can be supplied.

EFCO TD-05 diameter up to 150 mm(up to 6)

EFCO TD-1 diameter up to 400 mm(up to 16)

EFCO TD-2 diameter up to 600 mm(bis 24)

EFCO TD-3 E diameter up to 400-1500 mm(16-60) CNC-controlled

Optionally the TD-machines can be supplied withtaper turning attachment, or with high speedgrinding attachment.

The TD machine can be used formachining of valve seats or flanges. Bymeans of special boring-crown thewelded joints seat ring- valve body can beremoved. (please see the drawing on theleft)

8Our build-up welding machines are designed for producing build-up welds on flat, cylindricaland conical sealing surfaces in all fittings, valves and slide valves.These are:

EFCO-CW 1000

Automatic axial and radial build-up welding device up to a diameter of 30- 1000 mm (1 - 40) and the EFCO CW 150 machine for smaller valves (20 mm-150 mm (3/4-6)).The CW 1000 is a unique machine world-wide because it is the only one that canautomatically produce radial, axial and conical build-up welds.The scope of delivery also includes power sources for MIG/MAG welding and various typesof electrodes.

Small, localised damage to sealing surfaces can be easily repaired using a WIG weldingdevice. These devices are also in our product range.All the devices are suitable for use on site and in the workshop.

93. Repairing conical valve seats

These types of valves include shut-off and control valves for high pressure and hightemperatures. They are usually used to control steam and water flow in thermal power plants.We have developed some simple and extremely efficient electrical and compressed air-powered tools for repairing this kind of valves.

These grinding tools are called the VSK tools and aremanufactured with cone angle dimensions of 30(2x15),40(2x20), 60(2x30), 75(2x37,5) and 90(2x45) andnominal diameters of DN 10 - 300 mm (3/8-12) asstandard.Other cone angles and nominal diameters may bemanufactured on request.For nominal ranges up to DN 300 mm (12), we makeuse of our VALVA S15 (see photo).Reliable, fast centring (important) is achieved using acentring cone (1) and (for greater nominal diameters) athree jaw chuck (2). For machining grinding paper orabrasive cloth segments are used.Special tools have been developed for valves fromDN 300 mm and above, these are operated with theValva 2 machine.

It has already been mentionedthat conical valve seats can alsobe machined using our EFCOVSA and EFCO TD machines.We also have special tools formachining the flange surfaces formetallic lens seals (2x70).

10

4. Repairing safety valves

Various devices and machines have been developed for making repairs in the workshop.Our VALVA SV1 machine is suitable for machining the sealing surface of valve seats withnominal diameters of DN 20-150 mm (3/4-6 freehand operation) on site. It is also suitablefor repairing other valves with flat seats. For the repair of safety valves in workshop a specialstationary SMS 450/750 machine was developed.Both machines are used for the fine grinding of the sealing surface using special self-adhesive grinding foil, using which the requested surface finish can be achieved. The SMSmachine is also suitable for lapping.The following flat lapping machines are particularly suitable for machining valve disks:

TYPE Disc sizemm

Inner diameter ofdressing rings

FLM-400 400 3 x 140

FLM-600 600 3 x 250

FLM-900 900 3 x 370

FLM-1200 1200 3 x 510

FLM-1500 1500 3 x 610

Flat lapping machines are also suitable for lapping andpolishing mechanical seals for high pressure pumps.The surface to be machined must be monitored at all times;it should be checked whether the flatness and finish of thelapped sealing surfaces is correct.We can also supply the necessary accessories:Monochromatic light source with optical flat glasses,roughness measuring devices and the associatedconsumable materials (silicon carbide, boron carbide,lapping liquid etc.).

EFCO valve test stands for safety valves are builtin accordance with international standards andrequirements. In accordance with customerrequirements we also supply PC and a printer andsoftware for test data acquisition and test reportprinting

It is often impossible to repair safety valves on site, but with the special LEGATEST devicethe opening pressure of the safety valve (i.e. the force at which the valve opens) can bemeasured and adjusted.

11

5. Gate valve repairs (different dimensions, pressure and design)

Our globally-renowned machines are used for repairing small to medium size damage tosealing surfaces, gate valve wedges and flanges on site or in the workshop:

EFCO-SL 02 for DN 10-32 mm(3/8-1 1/4)

EFCO-SL 05 for DN 20-80 mm(3/4-3)

EFCO-SL 1 for DN 40-200 mm(1 1/2-8)

EFCO-SL 15 for DN 40-300 mm(1 1/2-12)

EFCO-SL 15L for DN 40-450 mm(1 1/2-18)

EFCO-SL 2 for DN 200-700 mm(8-28)

EFCO-SL 2L for DN 200-900 mm(8-36)

EFCO-SL 3 for DN 500 bis 2000 mm(20-80)

The EFCO SL-02 and EFCO SL-05 machines areavailable with compressed air drives only, and allother machines are available either ascompressed air or electrically powered versions.They are also available with a rocker with apatented digital display for indicating themachining pressure. By means of a specialattachment EFCO-SLV it is possible to use thesemachines for grinding and lapping of sealingsurfaces in globe valve bodies.The tools used with the EFCO SL-02 and SL-05machines are steel grinding disks, onto which self-adhesive waterproof grinding paper is applied. Allthe other SL machines use planet wheels with 3 to12 grinding spindles.

The grinding spindles are mounted in ball bearings and are radialy continuously adjustable(depending on the diameter of the sealing surface in the gate valve). The planet wheels arefitted with grinding spindles made from hardened steel, onto which self-adhesive grindingpaper rings are applied, or GSS disks (with galvanicaly bonded CBN), which make fastermachining possible. GSS disks are more temperature resistant and are particularlysuitable for machining extremely hard sealing surfaces.All SL machines are also suitable for lapping. The planet wheels are then equipped withlapping spindles made from grey cast iron. For lapping takes the oil-thinned lapping paste isused.

12

Local areas of average damage on the sealing surfaces (approx. 0.7-1.5 mm deep) ingate valve housings and on gate valve wedges or flanges are repaired using the WIGwelding process and then ground as per the instructions given in the above.

Gate valve wedges can be repaired (groundand lapped) on site using the appropriate SLmachine. The universal grinding table KS-6 isvery convenient for repair of smaller gatevalve wedges (see illustration on the left).

Gate valve wedges can be repaired very efficientlyon site using the appropriate SL machine. Smallergate valve wedges can be machined using ouruniversal KS 6 grinding table.EFCO MK adapters are enhancing the productivityof the EFCO tools. The sealing surfaces of gatevalve wedges, in valve and gate valve housings canalso be efficiently ground (lapped) on a drill pressusing a simple EFCO adapter, the EFCO ENT tiltingtable and the appropriate tools of the SL machine.

13

On-site repair in severely damaged gate valve housings

If deep local damage has occurred to thesealing surface in gate valve housings, therepair should be made as follows: local build-up welding using the WIG process (noannealing required), then grinding the entiresealing surface using our high-speed HSSgrinding machine for nominal diameters of:

HSS 05 DN 80-300 mm (3-12)HSS 1 DN 200-600 mm (8-24)

Repairs to large areas of damage:first remove the old damaged sealing surfaceby grinding on the HSS machine, then heatthe gate valve to the required temperature asper the manufacturer's instructions, weld onthe new sealing surface surface (a newmachine for on-site welding of sealingsurfaces in gate valve housings is beingdeveloped), anneal,

GermanyBaujahrHSS-1

Maschnr.Maschinenbau GmbH&CoKG

Postfach 100527-52305 Dren

E R

allow to cool and then grind the new sealingsurfaces on the HSS. The entire process iscomplicated but still the only alternative.

The HSS machines are delivered withpneumatic motors.

The following types of grinding tools can besupplies

Face wheels made from silicon carbide orspecial fused alumina

Grinding cone or cylinder with grindingpaper sleeves

EFCO-GSS grinding discs (galvanicalybonded CBN)

14

If you wish to accelerate this process, we recommend our new gate valve lathes (pic.1) (in test stage):

pic.1

EFCO-TSD 1for DN 200-300 mm ( 8-12)

EFCO-TSD 2for DN 300-400 mm (12-16)

10

0

30

20

50

40

pic.2

These machines can also beused to crop the housingseat rings in high pressuregate valves using theoptional accessory (pic.2).

6.

On-site flange machining on fittings, valves, pipelines, heat exchangers, boilers andcolumns.Our outer diameter mounted machines are ideal for machining the sealing surface of anyflange:EFCO-TDF 05 for diameter of 0- 250 mm

(0-10)EFCO-TDF 05A for diameter of 0- 250 mm

(0-10)EFCO-TDF 1 for diameter of 0- 500 mm

(0-20)EFCO-TDF 1A for diameter of 0- 400 mm

(0-16)EFCO-TDF 2 for diameter of 300-1200 mm

(12-48)EFCO-TDF 3 for diameter of 700-2000 mm

(28-80)and under development:EFCO-TDF 4 for diameter of 1300-3000 mm

(52-120)

These machines are robust and still relatively light. They are driven by electric orcompressed air motor.

15

Chapter B. Valve repairs or maintenance in the workshop

All the above-described machines can also be used in the workshop.

The first phase of a valve repair in the workshop is sorting the valves, then dismantling,marking and visual inspection (locating defects). The standard tools are required for thisoperation. Hydraulic or pneumatic screw drivers and nut splitters (also in our product range)are very useful.

Then the valve must be cleaned. For this purpose one or more of thee following procedurescan be used:1. Sand or shot blasting (with glass pearls or steel balls)2. High pressure cleaning (water or steam)3. Washing with chemical solutions in special automatic machines4. Mechanical cleaning

Then the valves are sorted into two groups: One group containing valves where welding andturning are not required, and the other group containing valves requiring these operations.

The valves in the first group can be machined using our stationary grinding and lappingmachines:

EFCO SM 450 for valves up to DN 300 mm (12) EFCO SMS 450 for safety valves up to DN 200 mm (8) EFCO SM 750 to DN 500 mm (20) EFCO SMS 750 for safety valves up to DN 350 mm (14)

The machines are suitable for repairing anyvalves, gate valve housings and gate valvewedges up to the above-mentioned nominaldiameters. The repair is made using thesame tools as those used with the mobilemachines.

EFCO SM-SMS 450

SM 750

For repairing valves with flat and conicalseats up to DN 150 we recommend theVALVA S1 hand machine and the VSKtools for conical valve seats.

16

The following repair procedure for the valves belonging to the second group where thebuild-up welding (stelite or some other material) is required

removing of the old sealing surface by turning build-up welding thermal treatment - annealing machining (turning) to restore the original dimensions of the sealing surface

For machining the special CNC turning machine with precision tilt table (accuracy 5) areused:

EFCO SPM-600 with swivelling table 800 x 800 mm for low pressure valves up to max. DN 500 mm for high pressure valves up to max. DN 300 mm

EFCO SPM-800 with swivelling table 1000 x 1000 mm for turning for low pressure valves up to max. DN 600 mm for high pressure valves up to max. DN 500 mm

For larger valves up to DN 1500 mm we have aspecial machine in our product range:

The machine is manufactured as per customerrequirements, consisting of:Machine bed with stable cast structure, precisioncross-tilting table with appropriately sized surface.The above-described TDE-3 machine is mountedon the machine bed. In this way the system can beused for both stationary and on-site machining.

For build-up welding we use the above-described equipment, also for on-site machining.For build-up welding it is important to preheat the valve body (base material) to theappropriate temperature and to cool it down in the annealing furnace after welding.Our product range includes an annealing furnace.

After all the components have been machined and re-checked, installation and sealing takesplace. Our product range also contains the tools and machines that are needed tomanufacture gaskets and prepare the gland packings.

17

The test benches supplied are custom made unitsoptimised to fulfil the requirements of a particularcustomer. The units with clamping forces rangingfrom 7,5 up to more than 1000 tons were built.EFCO test benches are designed for testing ofglobe valves, slide valves, check valves, controlvalves, ball valves and safety valves with air,nitrogen or water.The valves with flanges, treaded or butt weld endscan be clamped. The production program comprisesstationary, transportable, vertical, horizontal, manualand automatic units.

(photo right: transportable test bench PS-T 10)

After the assembly the valves oneor more of the following tests areto be performed

Body test to prove its mechanicalstrength, spindle leakage test,sealing test ...The opening pressure of safetyvalves is also tested.EFCO is providing the equipmentto perform these.

(photo left: semi-automatic testbench PS-15 A)

18

Consumables and tools

Our product range also includes the consumables that are required for repairing valves:

a) various grinding materials:grinding paper, grinding foil, grinding cloth (self-adhesive / non-self-adhesive)

b) Abrasive wheels:grinding shot, GSS grinding disks (cubic-crystalline boron nitride in a galvanic bonding)

c) Lapping pastes with various grain sizes and all the consumables that are required forlapping and polishing machines, and also diamond lapping paste and emulsion

d) Tools for all our mobile and stationary lathes

e) Gaskets

f) Dye penetration spray

g) Complete sets of tools for on-site machining

Our companys strength lies in having highly qualified personnel and maintaining continuouscontact with our customers.We have a great deal of expertise in our valve repair department and are available to ourcustomers for advice. We develop and process projects for valve maintenance for all powerstations, industrial areas, companies, countries and small workshops based on specificrequirements and requests. We also provide our customers with in-house or on-site training.If required we can also supply our specialists for longer periods for commissioning ourmachines on customer sites.

If limited funds are available for purchasing equipment, we can advise our customersconcerning the order in which the equipment should be procured.

We also provide individual, fullyequipped mobile workshops on thebasis of customer requirements andrequests.

19

We also manufacture grinding and lapping machines for repairing plug valves up toDN 250 mm to order.We also supply special machines for grinding and honing spheroids up to DN 250 mm thatcan be mounted on conventional lathes.

For power stations and shipbuilders wemanufacture special KDM coupling hole lathesfor boring holes in turbine, gear-box, generatorand ship couplings.

We supply special machines formachining pipe ends and cutting pipeswith diameters between 20 and1600 mm.

We have solved many different kinds of problem that have occurred during our on-sitemachining activities and have developed special machines to meet these requirements. Weare convinced that we can solve your problems!Ask us about them and pay us a visit!

In constant aim to improve our products, we preserve the right to change the technicalspecification without prior notice.

Recommendation for the repair of valves using EFCO machines

G:\TB\TEXTE\EMPFEHLU.NG\REP-EMPF.DOC

page 3/15

GROUP 1A

FLAT SEAT VALVES 1.1 stop valve DN 10-50check valve DN 10-50

1.9 regulating valve DN 3001.2 stop valve DN 50-12001.4 check valve DN 50-250

1.3 HP stop valve1.5 HP check valve

DN 10-501.8 quick acting valve

DN 50-5001.10 HP regulating valve

EFCO DN ( ) On Insurfac

eprocedure repair machines 8 20 25 50 80 100 150 200 300 400 500 600 800 1000 1200 1500 2000 site shop

S L I G H T T O S E V E R E D A M A G E1 grinding VALVA-S05 / S05-S l l2 VALVA-S1 l l3 VALVA-1 l l

VALVA-S15 l l

VALVA-15 l l

VALVA-2 l l

VALVA-3 1600 l l

MK-2 + tools + ENT-1/2 l



SM-450 l

SM-750 l

SPM-600 l

SPM-800 l

1 lapping VALVA-1 l l VALVA-15 l l

VALVA-2 l l

VALVA-3 1600 l l




SM-450 l

SM-750 l

SPM-600 l

SPM-800 l



page 4/15



S L I G H T T O S E V E R E D A M A G E1 high-speed VSA-05 l l2 grinding VSA-1 l l3 VSA-2 250 l l

VSA-3 l l

SPM-600 u l

SPM-800 u l

R E N O V A T I O N O F S E A L I N G F A C E S R E S P. S E A T S ( R E S U R F A C I N G )1 turning TD-05 150 l l2 TD-1 l l3 TD-2 l l4 TD-3 E l l

SPM-600 l

SPM-800 l

2 TDF-05 250 l lTDF-05A 250 l l

3 TDF-1 l lTDF-1A l l

TDF-2 l l

TDF-3 700 l l

TDF-4 1300 3000 l l

1 high-speed VSA-05 l l2 grinding VSA-1 l l3 VSA-2 250 l l

VSA-3 l l

SPM-600 u l

SPM-800 u l



page 5/15



4 high-speed VSA-1 l lgrinding VSA-2 250 l l

VSA-3 l l

SPM-600 u l

SPM-800 u l

Lapping can be replaced by grinding (using micron abrasives).

Application: -machining of many small valvesPerformance: -drive with more power

-double quantity of tooling ( grinding discs, pin wrenches)

u with grinding head (optional)

With bore grinding device (optional)



page 6/15

GROUP 1B

VALVES WITH FLAT SEATSSAFETY VALVES

safety valve DN75-700

EFCO - new proceduresSuperfinish grinding instead of lapping

(with VALVA-S05 and VALVA-S1)our test results point out that comparable surface

roughness can be achieved by superfinish grindinginstead of lapping.

To this we recommend our micro abrasives:

P 500 = 3 0 Micron Rz 1,2 Ra 0,1

P 1200 = 15 MicronP 1200 = 15 Micron

P 1600 = 9 MicronP 1600 = 9 MicronRoughness RzRz RaRa

0,7

0,5

0,06

0,04... ...

For repairing safety valves, manufacturesrecommendations must be observed!



S E A T D A M A G E1 grinding VALVA- S05-S l l

VALVA-S1 (VALVA SV-1) l l

VALVA-1 (lapping) l l

VALVA-S15 l l





SMS-450 l

SMS-750 350 l

2 turning SPM-600 l3 SPM-800 l

R E N O V A T I O N O F S E A L I N G S U R F A C E S23 for working the surfaces 2 and 3, see table on page 3

R E N O V A T I O N O F S E A T S A N D S A F E T Y V A L V E T A P E R Slapping FLM - 400 l

FLM - 600 l

FLM - 900 l

FLM-1200 l

FLM-1500 l

FLM-1800 l



page 7/15

GROUP 2

VALVES WITHCONICAL SEAT

2.1 low pressure stop valve 2.2 HP stop valve 2.3 regulating valve

For working sealing seats2 and 3 see table,

page 3



S L I G H T T O S E V E R E D A M A G E1 grinding VALVA-S1 + VSK-tools 10 l l

VALVA-S15K + VSK-top segm. 10 l l

VALVA-2 + VSK-top. segm. l l

A V E R A G E T O S E V E R E D A M A G E1 high-speed VSA-05 l l

grinding VSA-1 l lVSA-2 250 l l

VSA-3 l l

grinding VALVA-S1 + VSK-tools 10 l lVALVA-S15K + VSK-top segm. l l

VALVA-2 + VSK-top segm. l l

R E N O V A T I O N O F S E A T S A F T E R H A R D F A C E W E L D I N G1 high-speed VSA-05 l l

grinding VSA-1 l lor VSA-2 250 l l

VSA-3 l l

turning SPM-600 lSPM-800 l

TD-1 + taper turning tool l lTD-2 + taper turning tool l lTD-3 E l l

finish- VALVA-S1 + VSK-tools 10 l lgrinding VALVA-S15K + VSK-top segm. l l

VALVA-2 + VSK-top segm. l l

2 turning TDF-05 250 l lTDF-05A 250 l l



page 8/15

3 TDF-1 l lTDF-1A l l

GROUP 3

GATE VALVES ANDSWING CHECK VALVES

3.1 HP gate valve 3.2 gate valve flanged 3.3 gate valve with seat ring 3.4.1 swing check valve 3.4.2 swing check valve (min. 30)



TDF-2 l lTDF-3 700 l lTDF-4 1300 3000 l l

S L I G H T T O S E V E R E D A M A G E1 grinding SL-02 32 l l2 SL-05 l l5 SL-1 40 l l6 SL-15 40 l l

SL-15 L 40 450 l l

SL-2 700 l l

SL-2 L 900 l l

SL-3 l l

VALVA-1/S1 l l

VALVA-S15 l l

MK-2 + tools + ENT-1/2 l l



SM-450 l

SM-750 l

lapping SL-1 40 l lSL-15 40 l l

SL-15 L 40 450 l l

SL-2 700 l l

SL-2 L 900 l l

SL-3 l l

VALVA-1 l l



page 9/15






SM-450 l

SM-750 l

7 grinding SL-1 40 l lSL-15 40 l l

SL-15 L 40 450 l l

and SL-2 700 l lSL-2 L 900 l l

lapping SL-3 l l

R E N O V A T I O N O F S E A L I N G S U R F A C E S R E S P. S E A T S A F T E R H A R D F A C E W E L D I N G1 grinding HSS-1 l l

HSS-05 l l

5 SPM-600 u l6 SPM-800 u l

1 turning TSD-1 (planed) l l5,6 TSD-2 (planed) l l

23 for working the surfaces 2, 3 and 4 see table , page 34

REPLACING OF SEALING FACES WITH PORTABLE BUILD_UP WELDING MIG/MAG WITH EFCO-WELDING MACHINES

EFCO CW 150 20- 150 mm - axial up to 75 mm EFCO CW 1000 30-1000 mm - axial up to 150 mm

u with grinding head (option)

with adapter head und tilt table (option)



page 10/15

GROUP 4

VALVE ACCESSORIES4.1 wedge 4.2 disk 4.3 cone



S L I G H T T O S E V E R E D A M A G E7 finish- MK-2 + tools + ENT-1/2 l8 grinding MK-3 + tools + ENT-2/3 l

MK-5 + tools + ENT-4 l

SM-450 l

SM-750 l

grinding SL-05 l lSL-1 40 l l

SL-15 40 l l

Sl-15L 40 450 l l

SL-2 700 l l

SL-2L 900 l l

SL-3 l l

VALVA-S1 l l

VALVA S15 l l

KS-6 l

SM-450 l

SM-750 l

lapping SL-1 40 l lSL-15 40 l l

Sl-15L 40 450 l l

SL-2 700 l l

SL-2L 900 l l

SL-3 l l

VALVA-1 l l

VALVA-15 l l

SM-450 l

SM-750 l



page 11/15



page 12/15



FLM-400 lFLM-600 l

7 lapping FLM-900 lFLM-1200 l

FLM-1500 l

FLM-1800 l

R E N O V A T I O N O F S E A T S A F T E R H A R D F A C E W E L D I N G7 turning lathe l

SPM-600 l

SPM-800 l

finish- MK-2 + tools + ENT-1/2 lgrinding MK-3 + tools + ENT-2/3 l


SM-450 l

SM-750 l

SPM-600 l

SPM-800 l

8 grinding VALVA-S05 l lVALVA-S1 l l

VALVA-1 l l

VALVA-S15 l l

VALVA-15 l l

VALVA-2 l l

VALVA-3 1600 l l

MK-2 + tools 450 l

MK-3 + tools 900 l

MK-5 + tools l

SM-450 l

SM-750 l

KS-6 l

SPM-600 l

SPM-800 l



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8 lapping VALVA-1 l lVALVA-15 l l

VALVA-2 l l

VALVA-3 1600 l l



MK-5 + tools + ENT-4 l

FLM-400 l

FLM-600 l

FLM-900 l

FLM-1200 l

FLM-1500 l

FLM-1800 l

SM-450 l

SM-750 l

SPM-600 l

SPM-800 l

R E N O V A T I O N O F S E A T S A F T E R H A R D F A C E W E L D I N G8 turning lathe l

SM-750 u l

SPM-600 l

SPM-800 l

finish- VALVA-S05 l lgrinding VALVA-S1 l l

VALVA-1 l l

VALVA-S15 l l

VALVA-15 l l

VALVA-2 l l

VALVA-3 1600 l l




SM-450 l



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8 finish- SM-750 lgrinding KS-6 l

SPM-600 l

SPM-800 l

S L I G H T T O S E VE R E D E M A G E9 grinding VALVA-1/S1 + disk grinder 15 l l

R E N O V A T I O N O F S E A T S (R E S U R F A C I N G)9 turning lathe l

SPM-600 l

SPM-800 l

u with turning head (option)



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GROUP 5

OTHER SEALING SEATS5.1 working of tube ends for metallic lens type gaskets (a=140 to

DIN2696) 5.2 working of flanges with annular sealing groove



S L I G H T T O S E V E R E D A M A G E1 grinding VALVA-S1 + LS-tools l l

VALVA-S15 + LS-tools l l

R E N O V A T I O N O F S E A L I N G S U R F A C E STDF-05 +taper head 250 l lTDF-05A + taper head 250 l l

1 turning TDF-1 + taper head l lTDF-1A + taper head l l

2 TDF-2 + taper head l l3 TDF-3 + taper head 700 l l4 TD-1 +taper turning tool l l

TD-2 +taper turning tool l lTD-3 E l lSPM-600 lSPM-800 l

1 grinding VALVA-S1 + LS-tools l lVALVA-S15 + LS-tools l l

In constant aim to improve our products, we preserve the right to change the technical specification without prior notice.EFCO VALVA TEST BENCHES

(Standard- und special design)

For testing flanged and welded valves For testing safety valves

For testing pressure regulating valves

EFCO booster units



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LEGEND

VALVA Portable grinding and lapping machine for valves and flangesVSK-TOOLS Special tools for grinding conical seatingsVSK-TOP SEGMENTS Conical top segmentsVSA Portable high-speed grinding machine for valves and flangesSL Portable gate valve grinding and lapping machineHSS Portable high-speed gate valve grinding machineTD Portable turning machine for working sealing seats and drill holesTDF Portable turning machine for working flangesTSD Portable gate valve turning machineFLM Stationary face lapping machineKS Grinding table for wedges and disksSM Stationary grinding and lapping machineSPM Stationary turning, grinding and lapping machineMK Adapter for grinding and lapping wheelsENT Tilt tablesLS Special tools for working metallic lens type gaskets and tube endsKDM Flange coupling boring machinePS Valve test benches

Efco Repair Recommendations

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