Diaphragm Check Valves

Plastic Diaphragm Check Valves feature Straight Shaft, Single Barb, Triple Barb, Miniature, Precision Molded, Acrylic and High Flow Check Valves. Several Diaphragm and Housing options are available.

Diaphragm Check Valves Options

CV Series - Straight Shaft Check Valves
These low-pressure straight shaft or port (non-barbed) plastic diaphragm check valves provide backflow protection for fluid, air, gas and vacuum flows in a very broad range of applications.

Choose between nylon, polypropylene or PVDF (Kynar®) body materials. EPDM, fluorosilicone (FVMQ), silicone or Viton™ (FKM or FPM) diaphragm material options. 1/8” flexible tubing inner diameter (ID) connections.
- Highly reliable performance
- Can be installed in any position for maximum flexibility
- Free-floating diaphragms respond to the slightest pressure change
- Very rapid response times between free-flow and no-flow conditions
- Designed to perform at high (automotive) industry standards but very economical
CV Series - Single Barb Check Valves
These low-pressure single barb hose barbed plastic diaphragm check valves provide backflow protection for fluid, air, gas and vacuum flows in a very broad range of applications.

Choose between nylon, polypropylene or PVDF (Kynar®) body materials. EPDM, epichlorohydrine (ECO), fluorosilicone (FVMQ), or Viton™ (FKM or FPM) diaphragm material options. 3/16", 1/4", 5/16" or 3/8" flexible tubing inner diameter (ID) connections.
- Highly reliable performance
- Can be installed in any position for maximum flexibility
- Free-floating diaphragms respond to the slightest pressure change
- Very rapid response times between free-flow and no-flow conditions
- Designed to perform at high (automotive) industry standards but very economical
CV Series - Triple Barb Check Valves
These low-pressure triple barb hose barbed plastic diaphragm check valves provide backflow protection for fluid, air, gas and vacuum flows in a very broad range of applications.

Choose between nylon or PVDF (Kynar®) body materials. Epichlorohydrin (ECO) or Viton™ (FKM or FPM) diaphragm material options. 3/8" flexible tubing inner diameter (ID) connections.
- Highly reliable performance
- Can be installed in any position for maximum flexibility
- Free-floating diaphragms respond to the slightest pressure change
- Very rapid response times between free-flow and no-flow conditions
- Designed to perform at high (automotive) industry standards but very economical
C Series - Miniature Plastic Check Valves
- 1/16”, 1/8” Hose Barb and 10-32 Female threads available
- Body materials include Polypropylene and Polysulfone
- Miniature size Plastic Diaphragm Check Valves with low cracking pressures
CVN/CVP/CVK Series - Precision Molded Check Valves
- Inlet: 1/8" to 3/8" Hose Barb, 1/8" Male NPT
- Outlet: 1/8" to 3/8" Hose Barb
- Available with Silicone, Viton and Neoprene diaphragm
- Body materials include Nylon, Polycarbonate, Kynar and Polypropylene
- All parting lines on the critical sealing surfaces have been eliminated
- After molding, check valves are assembled using a non-toxic technique without the use of foreign materials
Performance Characteristics
- Crack: 1/2 psi
- Seal: 1.9 psi
- Max Pressure: 50 psi
CVRT Series - High Flow Check Valves
- 1/8” to 3/8” Hose Barb
- Acrylic body with a silicone seal
LCVA Series - Luer Check Valves
- Male Luer Lock, Male Slip Luer and Female Luer Thread connections
- Polycarbonate body with a silicone seal