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No. 3400 Check Valve


Used as an all purpose check valve for multiple applications, including hot water, cold water, steam, oil, gas, compounds and chemicals. Steam 125 lbs.

SKU: 3400 Category: Tags: , ,

Type: Check Valve / Material: 303 Stainless / Seal: Stainless Steel / Fluid Types: Chemicals, Drinking Water, Food and Beverage, Fuels, Hydraulic Fluid, Non-Potable Water, Steam

Stainless Steel Check Valve with Stainless Steel Poppet

The No. 3400 check valve is made of a one-piece cast stainless steel body, with all internal components also of stainless steel. The proprietary stainless steel poppets are finely machined for a metal-to-metal seal. Designed to operate in any position, a sensitive spring has been added to close the poppet automatically. Each valve is tested twice for casting integrity and backflow prevention and is built to last. This model is machined, assembled and tested in the USA with imported castings.


Part Number Pipe Size Flow Rate (Cv) Overall Length Valve Diameter Valve Weight
3400-075 3/4" 6 GPM 3.31" 1.62" 0.80 lb.
3400-100 1" 12 GPM 3.69" 2.00" 1.30 lb.
3400-125 1-1/4" 23 GPM 4.57" 2.41" 1.95 lb.
3400-150 1-1/2" 32 GPM 4.88" 2.69" 2.35 lb.
3400-200 2" 58 GPM 5.56" 3.34" 3.65 lb.

Cv is flow (GPM) with a 1 psi differential pressure. NPT threaded.

Materials & Operational Specifications

Part NameSpecs
BodyCast Stainless CF16Fa (303)
Stem303 Stainless Steel
Poppet303 Stainless Steel*
Spring 302 Stainless Steel
Cup Washer 304 Stainless Steel
Locknut18/8 Stainless Steel
Country of OriginUSA (Machined, assembled and tested in the USA with imported castings)
Max. Temperature350°F
Working Pressure600 psi
Cracking Pressure 1-2 lbs.
Opt. Cracking Pressure 1/2, 5, or 10 lbs.

* 1-1/2″ – 2″ sizes contain a 304 stainless steel poppet

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov