Check Valves With Teflon® Seals

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-valves-with-teflon-seals
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: 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 ConnectionsValves 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-valves-with-teflon-seals
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".

 

Connections ASME STD.
Threaded B.1.20.1, B16.34
Butt Weld B16.25, B16.10, B16.34
Socket Weld B16.11, B16.10, B16.34
Max.Pressure 600 psi
Max.Temperature 450ºF
   
Flanged B16.34, B16.5, B16.10
Size 1" through 4"
Flanged End Pressure Rating at 100ºF:  
Stainless CF8M 275 psi
Steel WCB 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-valves-with-teflon-seals

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-valves-with-teflon-seals

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.
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