Check Valves With Teflon® Seals

Patented Teflon® Seal – Range of Sizes from 1/4″ to 4″ – Range of Connections
Threaded Ends – Butt Welded Ends – Socket Welded Ends – Flanged Ends

check valve diagram
Applications: Chemical – Petrochemical – Power Pharmaceutical – Pulp & Paper, Water/Waste Water Treatment, Mining – De-salinization – Irrigation, Refrigeration – Agriculture – H.V.A.C., Marine – Oil Products – Beverage

Special features make the Ward Check Valve unique. A patented spring-loaded plunger (A) positions an angled self-aligning disk (B) for positive sealing. Totally encapsulated by Teflon®, the elastomer disk flexes, thus ensuring a full line-contact seal.

Top Entry Design: In-line maintenance is easy. Just remove the threaded cap, examine the valve and, if the seal is damaged, replace it without any special tools.

Slurry-Protected Spring: The compression spring can be protected from particles by an optional stainless spring sleeve.

Patented Sealing System: The sealing plunger features an angled elastomer disk totally encapsulated in Teflon®, which protects the seal from the conveyed medium. This design produces positive shut-off at both low and high back pressure.

Aesthetics: High quality investment cast bodies make the Ward Valve the best you can buy. The all-stainless body is glass-beaded and passivated. Steel valves have black oxide coating. All internal components are 316 stainless steel.

Multiple Material Options: Material options include Alloy-20, Monel, Hastelloy, carbon steels, and stainless steel.

Superior Flow Characteristics: Angle-seat design keeps fluids flowing with minimal obstruction. Independent laboratory data confirm that the Ward valve has CV values equal or superior to competitive check valves.

Surpassing Industry Standards: ASME B16-34; 600 class wall thickness, for threaded, but-weld and socket-weld ends. Flanged ends available in ASME 150 class.

Multi-Position Mounting: Unlike most check valves, the Ward valve can be mounted in any position. Hex pipe ends provide easy installation.

End Connections: Valves are stocked in threaded, butt-weld, socket-weld, and flanged ends.

The Ward Check Valve has been rigorously tested at independent laboratories (Alden Research Lab) in programs that included a 15,000 cycle test after which there were no sign of leakage (Test results are available upon request.) These unique valves have been accepted by major CPI users for applications including multi-process lines where check valve leakage causes expensive product loss. Ward Valve’ CV, cracking pressure, and pressure/temperature ratings are equal or superior to competitive products, making this specialty valve ideal for chemical applications. The Ward Check Valve has a maximum temperature rating of 450º and a steam rating (saturated) of 150 W.S.P. Available with flanged ends in 1″ and 4″ diameters or threaded, socket-welded and butt-welded ends in 1/4″ to 2″ diameters, there is no more effective or reliable check valve on the market today.

check valve chart

Valve Size
CV Rating
Cracking Pressure (psi)
1/4″
1.21
 
1/2″
1.79
2.5
3/4″
9.60
2.0
1″
20.0
1.2
1-1/4″
33.0
0.9
1-1/2″
48.4
0.9
2″
87.0
0.6
3″
194.7
0.5
4″
343.1
0.5

Specifications
In-line spring-loaded Teflon® soft-seated plunger, encapsulated spring, body material CF3M, and WCB steel; all 316SS internals. Replaceable seat and plunger. Size 1/4″ through 2″.

ConnectionsASME STD.
ThreadedB.1.20.1, B16.34
Butt WeldB16.25, B16.10, B16.34
Socket WeldB16.11, B16.10, B16.34
Max. Pressure600 psi
Max. Temperature450ºF
FlangedB16.34, B16.5, B16.10
Size1″ through 4″
Flanged End Pressure Rating at 100ºF:
StainlessCF8M 275 psi
SteelWCB 285 psi

PIPED ENDS (1/4″ – 2″)

Threaded, Socket-Weld, and Butt-Weld End Connections. Threaded ends comply to ASME B1.20.3; weld ends come standard in SCH.40. Optional schedules 5 & 10.
check valve ends diagram

Valve Size
A
B
C
D
E
F
G
H
WT.
1/4″
0.62
0.86
0.50
0.62
0.84
0.25
2.44
2.20
0.9
1/2″
0.62
0.86
0.50
0.62
0.84
0.50
2.44
2.20
0.8
3/4″
0.82
1.07
0.56
0.82
1.05
0.75
3.13
2.76
1.2
1″
1.05
1.34
0.63
1.05
1.31
1.00
3.50
3.30
1.7
1-1/4″
1.38
1.68
0.69
1.38
1.66
1.25
4.38
3.95
4.0
1-1/2″
1.61
1.92
0.75
1.61
1.91
1.50
4.75
4.43
4.0
2″
2.07
2.41
0.88
2.07
2.38
2.00
6.00
5.49
6.7

All Dimensions expressed in inches, Weights in lbs.

UNIBODY FLANGED ENDS (1″ – 4″)

ASME 150 Class Flanged End Valve comply to ASME B16.34, B16.5, and B16.10.
check valve size diagram

Valve Size
A
B
C
D
E
F
WT.
1″
2.13
4.25
5.00
0.62
0.625
3.125
5.4
1-1/2″
2.88
5.00
6.50
0.56
0.63
3.88
10.0
2″
3.62
6.00
8.00
0.62
0.75
4.75
15.3

All Dimensions expressed in inches, Weights in lbs.