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No. 3300 Check Valve


Used as all purpose check valve for multiple applications, including cold and warm water, ethylene, glycol, and air.

SKU: 3300 Category: Tags: , , ,

Type: Check Valve / Material: 303 Stainless / Seal: Buna-S / Fluid Types: Air, Drinking Water, Non-Potable Water

Stainless Steel Check Valve with Buna-S Rubber Poppet

The No. 3300 check valve is made of a one-piece cast stainless steel body, with all internal components also of stainless steel. Designed to operate in any position, a sensitive spring has been added to close the poppet automatically. The rubber poppet is fully-formed around a solid steel insert to provide greater strength in commercial applications. Each valve is tested twice for casting integrity and backflow prevention and are 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
3300-075 3/4" 5 GPM 3.31" 1.62" 0.80 lb.
3300-100 1" 8 GPM 3.69" 2.00" 1.05 lb.
3300-125 1-1/4" 24 GPM 4.57" 2.41" 1.95 lb.
3300-150 1-1/2" 37 GPM 4.88" 2.69" 2.35 lb.
3300-200 2" 44 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
PoppetBuna-S Rubber
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. Temperature225°F
Working Pressure600 psi
Cracking Pressure 1-2 lbs.
Opt. Cracking Pressure 1/2, 5, or 10 lbs.

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