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No. 351 Check Valve

$58.61$970.75

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.

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SKU: 351 Category: Tags: , ,

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.
351-125 1-1/4" 24 GPM 4.57" 2.41" 2.00 lb.
351-150 1-1/2" 38 GPM 4.88" 2.69" 2.45 lb.
351-200 2" 61 GPM 5.56" 3.34" 3.90 lb.
351-250 2-1/2" 69 GPM 6.79" 3.81" 7.15 lb.
351-300-F 3" * 110 GPM 7.40" 4.71" 11.80 lb.
351-300 3" ** 69 GPM 6.79" 3.81" 8.15 lb.
351-400 4" 205 GPM 10.00" 5.80" 21.70 lb.


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 NameSpecs
BodyCast Bronze C84400
Stem303 Stainless Steel
PoppetBuna-S Rubber
Spring 302 Stainless Steel
Cup Washer 304 Stainless Steel
Locknut18/8 Stainless Steel
Country of OriginMade in the USA
Max. Temperature225°F
Working Pressure400 psi
Cracking Pressure 1-2 lbs.
Opt. Cracking Pressure 1/2, 5, or 10 lbs.

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