The Wafer Insert (WV) check valve also known as a wafer check valve is designed to fit between two mating ANSI flanges. Two gaskets are required, instead of the one normally used. The “drop in” wafer check valve body design fits inside the bolt circle for quick installation and removal in rigid piping applications where the use of the Flange Insert check valve (F1, F6, or FP) are not practical. Many valves in this series meet API 594 and/or B16.34 requirements. Consult the factory for complete details.
The Wafer Insert check valve can also be used as a low-pressure relief valve or vacuum breaker by simply using the desired spring settings.
| Nominal Pipe Size | Size Code | A | B | C | D* | Oricife Diameter |
|---|---|---|---|---|---|---|
| 1/2 | D | 1-3/8 | 0.62 | 1.38 | N/A | 0.348 |
| 3/4 | F | 1-3/4 | 0.82 | 1.38 | N/A | 0.464 |
| 1 | H | 2 | 1.05 | 1.38 | 0.35 | 0.593 |
| 1-1/4 | I | 2-1/2 | 1.35 | 1.63 | 0.27 | 0.890 |
| 1-1/2 | J | 2-7/8 | 1.61 | 1.63 | 0.54 | 1.135 |
| 2 | K | 3-5/8 | 2.07 | 2.38 | 0.17 | 1.385 |
| 2-1/2 | L | 4-1/8 | 2.47 | 2.62 | 0.31 | 1.555 |
| 3 | M | 5 | 3.07 | 2.88 | 0.42 | 2.025 |
| 4 | N | 6-3/16 | 4.03 | 2.88 | 1.25 | 2.560 |
NOTES (DIMENSIONS TABLE)*Maximum nominal dimension for a fully open valve with no spring. Consult factory for more information.
| * 316 Stainless Steel (SS) | * Alloy B (HB) |
| * Alloy 20 (A2) | * Alloy C-276 (HC) |
| * Brass (BR) | * Alloy 400 or MONEL® (MO) |
| * Carbon Steel (CS) | * Titanium (TI) |
| Body Material | Nominal Pipe Size | Non-Shock Pressure-Temperature Rating |
|---|---|---|
| 316 Stainless Steel (SS) Carbon Steel (CS) Alloy 20 (A2) Alloy C-276 (HC) Alloy B (HB) Alloy 400 or MONEL® (MO) Titanium (TI) | 1/2" - 2-1/2" 3" 4" | ANSI Class 150 - 1500 (1500 PSIG for o-ring seats) ANSI Class 150 - 900 (1500 PSIG for o-ring seats). ANSI Class 150 - 600 (1500 PSIG for o-ring seats) |
| Brass (BR) | 1/2" - 4" | ANSI Class 150 - 300 |
Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.
PRESSURE DROP PSI
| Size | Cv |
|---|---|
| 1/2 | 2.4 |
| 3/4 | 4.4 |
| 1 | 6.1 |
| 1-1/4 | 12.7 |
| 1-1/2 | 18.8 |
| 2 | 32.0 |
| 2-1/2 | 42.5 |
| 3 | 89.0 |
| 4 | 144 |
WATER FLOWRATE - GPM
Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.
| SIZE | PART NUMBER | SS, CS & Alloy | BRASS |
|---|---|---|---|
| 1/2 | WVD | 9.5 oz. | 10.2 oz. |
| 3/4 | WVF | 12.6 oz. | 13.5 oz. |
| 1 | WVH | 1.0 lb. | 1.1 lb. |
| 1-1/4 | WVI | 1.8 lb. | 1.9 lb. |
| 1-1/2 | WVJ | 2.4 lb. | 2.5 lb. |
| 2 | WVK | 5.2 lb. | 5.6 lb. |
| 2-1/2 | WVL | 7.2 lb. | 7.7 lb. |
| 3 | WVM | 11.4 lb. | 12.4 lb. |
| 4 | WVN | 17.2 lb. | 18.4 lb. |
Valve weights are approximate.
| Valve Style | Size Range | Body Materials Other Options | Allowable Seat Materials Other Options | Standard Cracking Pressures Other Options More Info. | Standard Spring Material More Info. |
|---|---|---|---|---|---|
| WIV | 1/2" 1-1/2 | 316 SS Brass | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/8 PSI 1/2 PSI 1.5 PSI 3.5 PSI | 316 SS |
| WIV | 1/2" 1-1/2 | C. Steel | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/8 PSI 1/2 PSI 1.5 PSI 3.5 PSI | 316 SS |
| WIV | 2" - 4" | 316 SS Brass | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/8 PSI 1/2 PSI 1.5 PSI | 316 SS |
| WIV | 2" - 4" | C. Steel | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/8 PSI 1/2 PSI 1.5 PSI | 316 SS |
| WIV | 1/2" - 4" | Alloy 20 Alloy C-276 | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/2 PSI | Alloy C-276 |
| WIV | 1/2" - 4" | Alloy 400 or MONEL® | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/2 PSI | Alloy 400 or MONEL® |
| WIV | 1/2" - 4" | Alloy B | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/2 PSI | Alloy B |
For additional information about Check Valves
What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?
What is an Inline Check Valves?
