Check valve, also known as non-return valve, back pressure valve,
one-way valve. This kind of valve is automatically opened and
closed by the force generated by the flow of pipeline mediation
itself, it is a kind of automatic valve. Used in household RO water
purifiers, between RO membrane outlet and pure water pressure
barrel (water tank), that make the pure water flow only from RO
membrane to water tank, and can’t flow back, the water purifier
stops working when water tank is full. The check valve is the first
component that pure water contacts after being produced, its role
is to prevent backflow of the pure water from leading to waste of
Wisnex series check valve, unique structure,with excellent
anti-blocking, anti-leakage performance, widely applicable to all
types of high-grade water dispenser, RO drinking system, pipeline
machines, water purifiers, coffee machines and other household
To resolve the issues of low upstream pressure of at some areas,
WISNEX invented and developed the models of LARGE FLOW check valve,
with the patent for invention No.2013100385724, 2013200559539.
Through our extensive testing, It has good performance even at low
water pressure situation.
Feed water pressure and outflow comparison table:
|Feed water Pressure||WISNEX LARGE FLOW check valve||General type check valve||Result|
|0.05Mpa (7.25PSI)||1.8 L/min||0.3 L/min||6:1|
|0.25Mpa (36PSI)||2 L/min||0.8 L/min||2.5:1|
|2)||Size||Tube OD 1/4”-Tube OD 1/4”|
|3)||Material||Food Rank POM&EPDM o-rings, with NSF/WRAS/FDA/ROhs
|4)||Cracking pressure||0.02Bar (0.3Psi)|
1) Low cracking pressure requirement (high sensitivity)
2) Large water flow (6Times under low feed water pressure)
3) Excellent anti-blocking, anti-leakage
4) Good abrasion resistance
5) Long working life
Q: How to get the price?
A: We need the follow information to quote for you;
1)Type or photo of our existing product
3) Other special needs like Logo/molds development
Q: Can I get some samples before bulk order?
A: 2-5pcs/item,if total value less than 10USD, samples are free.
And, customers should pay the freight cost or send by freight
payable at destination.
Q: Delivery and payment terms
A: Within one week for existing models' samples; 3-30 days for mass
production according to quantity.
Payment terms:EXW,FOB, CIF,C&F,etc. 35% T/T for deposit, 65%
balance before shipment
Q: How to claim for defective products
A: All of our products have one years' warranty.
First you can contact our sales person, then we will figure out it
ASAP and give you solutions.