Double Block and Bleed

We design, manufacture and supply

various kinds of double block and bleed valves for domestic and overseas projects with accumulated skills and competitive manufacturing capacity.

We use modernized machining and measuring equipments to meet various valve designs including big size valves and diverse requirements from clients.

Our experienced technical knowledge with the state-of-the-art facilities makes the greatest and best quality products, which results in customer satisfaction.

We promise to keep supplying the best quality products the most competitive price and the fastest delivery through continuous technical and production innovation.

We hope that we can be a good partner for your business.

Numbering System

fluid control solution

03

- -

DBB BodyMaterial

VentConstruction Trim Material

OperatorDesign Seat Type ProbeBore Pressure Class

Inlet Outlet

D

- -

Mono Flange

BodyMaterial

VentInlet Trim Material

ProbeOutlet Pressure Class

M

Seat Type

S

M

Soft Seat

Metal to Metal

Construction

T

S

Top Entry

Side Entry

Bore

F

R

Full

Reduced

Operator

P

G

B

M

L

S

Pneumatic Actuator

Motor Actuator

Gear

Lever

Bare Stem

Special

Design

F

T

Floating

Trunnion

Body Material

1

3

5

7

2

4

6

8

9

O

A105 / WCB

LF2 / LCC

F316 / CF8M

F304 / CF8

Duplex

Al-Bronze

Alloy 20

Hastelloy

Inconel

Others

Trim Material

1

3

5

7

2

4

6

8

S

CS + ENP

316SS

304SS

Duplex

Al-Bronze

Alloy 20

Hastelloy

Inconel

Special

Inlet Connections

F

S

T

P

J

B

H

Raised Face

Ring Type Joint

Socket Weld

Butt Weld

Threaded

Hub End

Special

Outlet Connections

F

S

T

P

J

B

H

Raised Face

Ring Type Joint

Socket Weld

Butt Weld

Threaded

Hub End

Special

Vent

A

O

B

½”

¾”

Others

Sampling

P

I

Probe

Injection

Pressure Class

A

C

E

G

B

D

F

P1

P2

P3

ANSI 150 lbs

ANSI 300 lbs

ANSI 600 lbs

ANSI 900 lbs

ANSI 1500 lbs

ANSI 2500 lbs

ANSI 4500 lbs

API 5000 PSI

API 10000 PSI

API 15000 PSI

04

Double Block and Bleed Valve

Why use a Double Block and Bleed Valve ?

Double Block and Bleed Valves have evolved to replace the process of bolting together individual valves to provide dual isolation

This new assembly provides great saving in weight, space and installation times especially in instrument or instrument cage isolation. These savings can be as much as 60% in weight and studies have shown that a 70% installation time saving is also possible.

However the greatest savings are to be seem in the reduction of leak paths to atmosphere, therefore reducing the risk of the potential hazards this entails.

Dual isolation in a necessary requirement when maintenance is taking place down stream of the first isolation valve. Cavity venting is provided by either a ball or globe OS&Y vent valve so that trapped pressure between the two isolation valves is safety vented.

Theses valves have also evolved to encompass the function of chemical injections (using a suitable quill) and sample points. In-built check valves are often integrated in these valves.

05

Size Range

Design / Features

Design Codes

End Connections

Pressure Class

Seat Design

Operator

½” – 56” (DN 15 – DN 1400) Double Block and Bleed Valves

Ball Type, Floating & Trunnion Mounted, Top & End Entry, Full & Reduced Bore, Cryogenic, Fire Safe Design, Anti-Static, Anti Blow-Out Stem

API 6D, API 6A, BS 5351, BS 6755 / BS EN 12266, NACE MR 0175, ANSI, ISO & API Standards

Flanged, Screwed, Butt Weld, Socket Weld, Hub End

ANSI 150 lbs – 4500 lbs, API 5000 PSI – 15000 PSI

Soft Seated, Metal to Metal, Single & Double Piston effect

Lever, Gear, Pneumatic, Hydraulic, Electric, Gas over Oil, Quarter Turn, Rack and Pinion, Scotch Yoke

fluid control solution

CompletedProducts

Flange To Flange Type

06

Cartridge Type

Flange To Screw Type

07

fluid control solution

SamplingProbeExtends

InjectionProbeExtends

Double Block and Bleed valves for chemical injection and sampling require an additional straight tubing onto the bore of the valve inlet flange face. This quill enters into the process flow and chemicals can be introduced through the valve. Incorporated in the valve design as additional check valve is required for this application in order to prevent reverse flow and process fluid contaminating the chemical source. For sampling the reverse is applied.

Sampling Double Block and Bleed Valves

A process interface valve fitted with an injection probe and a check valve allows fluid to be dispersed into the process stream while providing protection against back flow of process fluids.The sampling valve probe draws process fluid from the flow stream.

Injection Double Block and Bleed Valves

Injection of chemical and other media onto the process stream can be accomplished with this valve design.

The valve inlet houses a one way check valve which opens for injection and goes normally closed to eliminate process fluid outflow.

Instrument Process

Vent

Flow

L

OutletProcess

Vent

Flow

L

Instrument Process

Vent

Flow

L

OutletProcess

Vent

Flow

L

08

MonoFlanges

Applications

UA Monoflanges are designed to replace conventional multiple-valve installations currently in use for interface with pressure measuring systems.By combining customer specified valves into a single manifold, the number of leak paths is considerably reduced and the mass of the system is lowered reducing the stresses from loading and vibration.Additionally, Monoflanges can reduce installation and maintenance times and save weight and compactness.

Used on upstream offshore/onshore Gas and Oil production and initial processing installations. Typically used on gas gauge pressure instrument applications to minimize the size and weight of the pipe-valve assemblies used for primary and/or secondary isolation, vent and calibration.Also used in downstream Oil and Gas refining and Petrochemical production on flanged processes, primarily on light end gas applications.

Size Range

Design Codes

End Connections

Pressure Class

½” – 2” (DN 15 – DN 50) Monoflange

API 6D, API 6A, BS 5351, BS 6755 / BS EN 12266, NACE MR 0175, ANSI, ISO & API Standards

Flanged, Screwed, Butt Weld, Socket Weld

ANSI 150 lbs – 4500 lbs, API 5000 PSI – 15000 PSI

09

fluid control solution

Process Instrument

Process

Vent

Instrument

Process

Vent

Instrument

Process Instrument

Process

Vent

Instrument

Process

Vent

Instrument

Process Instrument

Process

Vent

Instrument

Process

Vent

Instrument

Process Monoflanges Instrument Monoflanges

Block1st Isolation : OS&Y

Block and Bleed1st Isolate : OS&YVent : Needle

Double Block and Bleed1st Isolate : OS&Y2nd Isolate : NeedleVent : Needle

Block1st Isolate : Needle

Block and Bleed1st Isolate : NeedleVent : Needle

Double Block and Bleed1st Isolate : Needle2nd Isolate : NeedleVent : Needle

Designed to replace the traditional primary isolation valve, the Primary Isolation Valve(OS&Y bolted bonnet) incorporates a primary isolate piping valve combined with instrument double block and bleed functions.

Instrument Monoflanges work in conjunction with a pre-installed primary valve to provide a compact instrument block and bleed valve or are used when primary valves with an OS&Y bolted bonnet are not required.

Mono Flange Types

10

DimensionsSIZE

(inch)RATING

(lbs)DIMENSION(mm)

A B L

1/2(DN 15)

150 89 60.3

STANDARD

30096 66.7

600

900 / 1500 121 82.5

2500 134 88.9

3/4(DN 20)

150 99 69.8

300118 82.5

600

900 / 1500 130 88.9

2500 140 95.2

1(DN 25)

150 108 79.4

300124 88.9

600

900 / 1500 150 101.6

2500 159 108.0

1-1/2(DN 40)

150 127 98.4

300156

114.3

600

900 / 1500 178 123.8

2500 203 146.1

2(DN 50)

150 152 120.6

300165 127.0

600

900 / 1500 216 165.1

2500

L

ØB

ØA

Dimensions Table Of Mono Flange

11

fluid control solution

CompletedProducts

Process Monoflange - Double Block And Bleed Type

Instrument Monoflange - Block And Bleed Type

1506-3 Seosam-Ro Chukdong-Myen Sacheon-Si Gyungsangnam-Do, Korea

www.uavalve.co.krsales@uavalve.co.kr

Tel. 82-55-852-5456~7 Fax. 82-55-852-9911

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UA Valve Product System

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※ The product is subject to change for technical development and quality improvement without prior notice.