OEMic

Wafer Check Valve

2” - 48” Dual Wafer Check Valve @ Class 150 - 900

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.

Price List

How to Order

Design Advantage:

- Lighter in weight, smaller in size.

- No Water Hammer effect.

- No Slamming.

- Independent plate suspension.

- Lower pressure drop.

- Lower 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 center of the sealed surface area. The contact point of the reacting spring leg’s force acts beyond the center 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 1/4～1/20 of the traditional flange check valve. The face-to-face dimensions are only 1/4～1/8 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.

Material List

NO.	PARTS	SPECIFICATION
1	BODY	Cast Steel ASTM A216 WCB Cast steel LCB SS 304 ASTM A351-CF8 SS 316 ASTM A351-CF8M SS 304L ASTM A351-CF3 SS 316L ASTM A351-CF3M
2	PLATE	13Cr, SS304, SS304L, SS316, SS316L.
3	SHAFT & SPRING	13Cr, SS304, SS304L, SS316, SS316L.
4	SEAT FACING	Viton,13Cr, SS304, SS304L, SS316, SS316L.
5	PIN	SS304, SS304L, SS316, SS316L.
Option. All other materials are available upon request.

Double discs. Swing type.

Wafer connection type

Manufacture in accordance with API 594.

Valve tested to API 598.

Dual Wafer Check Valve Design

Valve
Size

ANSI
Class 150

ANSI
Class 300

ANSI
Class 600

ANSI

Class 900

Inch

Wt (Kg)

2 3/8

4 1/16

2.1

2 3/8

4 5/16

2.3

2 3/8

4 5/16

3.5

2 3/4

5 9/16

6.5

2
1/2

2 5/8

4 13/16

3.1

2 5/8

5 1/16

5.0

2 5/8

5 1/16

5.0

3 1/4

6 7/16

9.0

2 7/8

5 5/16

4.0

2 7/8

5 13/16

5.3

2 7/8

5 13/16

7.0

3 1/4

6 9/16

14.0

2 7/8

6 13/16

6.2

2 7/8

7 1/16

7.4

3 1/8

7 9/16

12.0

8 1/16

24.0

3 7/8

8 3/4

13.1

3 7/8

9
7/8

18.2

5 3/8

10 7/16

35.0

6 1/4

11 3/8

43.0

25.0

12 1/16

31.0

6 1/2

12 9/16

45.0

8 1/8

14 1/8

56.0

5 3/4

13 5/16

39.0

5 3/4

14 3/16

54.0

8 3/8

15 11/16

77.0

7 1/8

16 1/8

54.0

7 1/8

16 5/8

88.0

17 15/16

110.0

7 1/4

17 3/4

80.0

8 3/4

19 1/16

128.0

7 1/2

20 1/4

118.0

9 1/8

21 1/4

169.0

21 5/8

210.0

8 5/8

23 7/8

240.0

8 3/4

28 1/4

410.0

*All other sizes are available upon request.

*Other technical data is available upon request.