No. 351 Check Valve
Price range: $78.94 through $1,247.95
Single-tapped check valve is generally used for submersible pump installations or when it is necessary to attach a pressure switch, pressure gauge, snifter valve, drain or blow lines, or adding chemicals. Offered in 1/8″ or 1/4″ NPT tapping and on either the inlet or outlet side.
Type: Check Valve / Material: Bronze / Seal: Buna-S / Fluid Type: Non-Potable Water / Special Use: Single-Tapped
Single-Tapped Check Valve with Buna-S Rubber Poppet
The No. 351 comes standard with a Buna-S rubber poppet, an extremely durable compound for use with potable drinking water. All other internal components of stainless steel. Each valve is tested twice for casting integrity and backflow prevention. All valves are 100% American-Made and built to last.
Dimensions
| Part Number | Pipe Size | Flow Rate (Cv) | Overall Length | Valve Diameter | Valve Weight |  |
|---|---|---|---|---|---|---|
| 351-100 | 1" | 13 GPM | 3.69" | 2.00" | 1.25 lb. | Download |
| 351-125 | 1-1/4" | 24 GPM | 4.57" | 2.41" | 2.00 lb. | Download |
| 351-150 | 1-1/2" | 38 GPM | 4.88" | 2.69" | 2.45 lb. | Download |
| 351-200 | 2" | 61 GPM | 5.56" | 3.34" | 3.90 lb. | Download |
| 351-250 | 2-1/2" | 69 GPM | 6.79" | 3.81" | 7.15 lb. | Download |
| 351-300-F | 3" * | 185 GPM | 7.40" | 4.71" | 11.80 lb. | Download |
| 351-300 | 3" ** | 69 GPM | 6.79" | 3.81" | 8.15 lb. | Download |
| 351-400 | 4" | 205 GPM | 10.00" | 5.80" | 21.70 lb. | Download |
Cv is flow (GPM) with a 1 psi differential pressure. NPT threaded. **New valve: Standard female threads on both ends, Cv factor of 185. **Original valve: 2-1/2" valve body with 3" male thread on both ends, Cv factor of 69.
Materials & Operational Specifications
| Part Name | Specs |
|---|---|
| Body | Cast Bronze C84400 |
| Stem | 303 Stainless Steel |
| Poppet | Buna-S Rubber |
| Spring | 302 Stainless Steel |
| Cup Washer | 304 Stainless Steel |
| Locknut | 18/8 Stainless Steel |
| Country of Origin | Made in the USA |
| Max. Temperature | 225°F |
| Working Pressure | 400 psi |
| Cracking Pressure | 1-2 lbs. |
| Opt. Cracking Pressure | 1/2, 5, or 10 lbs. |
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