OEMic

Cast Steel Check Valves

 

1/2” - 48” Duo-Plate Wafer Check Valve Class 150-Class 2500

 

The Dual Wafer Check Valve is an all around non-return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or lift check valve.


The Dual Wafer Check Valve design is the outcome of attempts to solve the problems associated with conventional swing check valve and lift check valve. The Dual Plate Check Valve employs two-spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place. This design offers the twin advantages of No Water Hammer and Non Slam simultaneously. All features put together make the Dual Plate Check Valve as the most efficient & versatile design.

 

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Design Advantages:

 Light in weight, small in size

  No Water Hammer effect

  No Slamming

  Independent plate suspension

  Low pressure drop

  Low wear and tear of seat faces

  Flexible installation

 

The innovative dual-plate design of the dual wafer check valve employs two spring-loaded plates suspended on a central vertical hinge pin. As flows begin, the plates open in response to a resultant force that acts as the centre of the sealed surface area. The contact point of the reacting spring leg’s force acts beyond the centre of the plate area, which will result the heel to open first. This feature prevents rubbing of the seal surface prior to normal plate opening and lower wear and tear of seat faces.

 

The weight of the dual wafer check is only 1/41/20 of the traditional flange check valve. The face-to-face dimensions are only 1/41/8 of the traditional one. With advanced structure, supreme performance and complete specification, our valves are highly regarded by our customers and are applied to the lines of petroleum, chemistry, metallurgy, light industry and sanitary industry, etc.

 

Standards:

Design & Manufacture

Face to Face to Face Dimensions

Pipe Flange Dimensions

Pressure- Temperature Rating

Testing & Inspection

API594, API 6D

API594, API 6D

ANSI B16.5

ANSI B16.34

API598

 

Application:

Applicable to various pipes of Class1502500PN1.042.0MPaworking temperature of -20800ºFcarbon steel-40930ºFstainless steelto prevent opposite flowing of fluids. Different materials are available for different service fluids like water, vapour, oil, nitric acid, acetic acid, intense oxidation fluid and urea, etc.

 

 

 

           

 

 

Materials

 

Part Name

WCB

LCB

WC6

WC9

C5

CF8

CF8M

CF3

CF3M

1

Body

A216 WCB

A352 LCB

A217 WC6

A217 WC9

A217 C5

A351 CF8

A351 CF8M

A351 CF3

A351 CF3M

2

Plate*

A216 WCB

A352 LCB

A217 WC6

A217 WC9

A217 C5

A351 CF8

A351 CF8M

A351 CF3

A351 CF3M

3

Spring

AISI 6150

17-7PH Stainless Steel   (Inconel for NACE Service)

4

Seat Facing*

See Trim Materials Chart below

5

Pin*

A182 F6a

A182 F6a

A182 F304

A182 F304

A182 F304

A182 F304

A182 F316

A182 F304L

A182 F316L

Note: *Trim parts include disc/plate, seat facing, and pin. For more optional trim materials, please check our HOW TO ORDER system.

           Other body materials are available upon request.

           OEMic reserves the right to modify our product design or construction without prior notice.

 

Dimensions and Weights

 

Class150

Class300

Class600

 

 

 

Class900

Class1500

Class2500