Cartridge Check Valves

Cartridge check valves (also called non-return valves) are designed for simple installation and offer outstanding performance inside mating housing. They are valves which only allows water to flow in one direction and prevents backflow.

XHnotion cartridge check valves are not only for water, also for air now. Applications include faucets, showers, valves and heating systems for residential or commercial installations, as well as pumps,

All the models are 100% tested during production for drip tight operation. Maximum temperature and pressure rating is for most models 200F(90C)/230psi. The average cracking (opening) pressure of most valves is between 0.25and 0.33 of a psi.

Features and Benefits

Zero leak at low and high pressure and temperature.

Generous flow structure promise the lowest headloss.

Compact, easy installation, 8mm-50mm diameter to meet all the system.

No thread connection to avoid potential leakage



MaterialAcetal housing, core, cover; EPDM O-Ring; SS304 Spring
Mediumwater, air
Size8mm to 50mm 
Cracking Pressure0.25Psi
Max Pressure230 Psi
Max temperature100 C (212F)
Production Capacity 1,000,000 pcs each month
Packing Details Poly bag, outer carton and pallet. 
Delivery Time3-20 days after confirming the order
Minium Order Quantity 2000 pcs
CertificateROHS, ACS, FDA, REACH

In static conditions (no flow)

The check valve is normally closed. The spring tension forces the plunger into its seat keeping the check valve closed.

In dynamic conditions (flow)

The water pressure exceeds the spring tension. The plunger is lifted off its seat allowing water to flow through the valve.

In backflow conditions (reversed flow)

If the pressure downstream of the valve increases (back pressure conditions) or if the system pressure upstream of the valve decreases (backsiphonage conditions) causing the flow to reverse direction, the spring-loaded plunger closes and prevents backflow.


  • Transparent plastic bag + white small box + neutral carton + pallet
  • Custom packaging are available, XHnotion brand packaging are available


  • Export port: Ningbo or Shanghai, China
  • Shipping way: by sea, by air, by courier
  • Delivery time 3 days to 30 days depends on actual orders.

         Payment Terms:

  • We accept T/T, L/C, Paypal, western union,etc.

          Samples Policy:

  • Free samples against your courier account or you pick up from us.
  • For custom items, we will discuss by email.

          Return Policy:

  • We assure you 1 year policy after shipment. If there is any problem during this period, please contact 

       us for support.