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No. 3640RB Check Valve


Used for food and beverage, biodiesel, hydraulic and pneumatic applications, or where resistance is needed for aggressive fuels and chemicals. Also where excellent heat stability is required. Rated for temperatures up to 350°F. Steam 125 lbs.

SKU: 3640RB Category: Tags: , ,

Type: Check Valve / Material: 316 Stainless / Seal: Stainless Steel / Fluid Types: Chemicals, Drinking Water, Food and Beverage, Fuels, Hydraulic Fluid, Non-Potable Water, Steam

316 Stainless Steel Check Valve with Stainless Poppet

The No. 3640RB Fusion™ check valve is made from solid 316 stainless steel bar, with all internal components also of 316 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. The patented Fusion™ valve design offers flexibility in configuring the end connections, with selections from pipe threads to hydraulic connections to hose barbs. All valves are 100% American-Made and built to last. Contact Strataflo now to see how this product can be customized for your application.


Part Number Pipe Size Flow Rate (Cv) Overall Length Valve Diameter Valve Weight
3640RB-025 1/4" 1.1 GPM 2.63" 1.12" 0.45 lb.
3640RB-025M 1/4" MNPT 1.1 GPM 3.83" 1.12" 0.55 lb.
3640RB-038 3/8" 3.1 GPM 2.63" 1.12" 0.45 lb.
3640RB-038M 3/8" MNPT 3.1 GPM 3.83" 1.12" 0.55 lb.
3640RB-050 1/2" 3.8 GPM 2.63" 1.12" 0.40 lb.
3640RB-050M 1/2" MNPT 3.8 GPM 3.83" 1.12" 0.55 lb.
3640RB-075 3/4" 8.8 GPM 3.31" 1.24" 0.55 lb.
3640RB-075M 3/4" MNPT 8.8 GPM 3.83" 1.24" 0.65 lb.
3640RB-100 1" 11.0 GPM 3.69" 1.49" 0.75 lb.
3640RB-100M 1" MNPT 11.0 GPM 4.53" 1.49" 1.00 lb.

Cv is flow (GPM) with a 1 psi differential pressure. Products listed contain NPT end connections. Contact Strataflo for technical specifications if another style of end connection is desired.

Materials & Operational Specifications

Part NameSpecs
Body316 Stainless Steel
Stem316 Stainless Steel
Poppet316 Stainless Steel
Spring 316 Stainless Steel
Spring Retainer316 Stainless Steel
Country of OriginMade in the USA
Max. Temperature350°F
Working Pressure3000 psi
Cracking Pressure 1-2 lbs.
Opt. Cracking Pressure 1/2, 5, or 10 lbs.