Plastic Back Flow Check Valve Dn18
|FOB Price:||US $0.06-0.9 / Piece|
|Min. Order:||2,000 Pieces|
|Min. Order||FOB Price|
|2,000 Pieces||US $0.06-0.9/ Piece|
|Production Capacity:||1000000 PCS Per Month|
|Payment Terms:||L/C, T/T, Western Union, Paypal, Money Gram|
- Model NO.: DN18
- Connection Form: Cartridge
- Pressure: Low Pressure
- Sealing Form: Seals
- Standard: ANSI
- Size: 8mm-50mm
- Spring: Ss304
- Trademark: XHnotion or no logo
- Specification: ROHS, REACH, CE, ACS, FDA
- HS Code: 8481804090
- Material: Actal
- Structure: Tubular
- Function: Only Allows Water to Flow in One Direction and Pre
- Flow Direction: Reversing
- Application: Household Usage
- Seal Material: EPDM
- Medium: Drinking Water, Air
- Transport Package: Plastic Bag
- Origin: China
Cartridge Check ValvesCartridge 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.
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
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
Application ExamplesIn plumbing systems, heating systems, water filtration and water handling appliances, XHnotion check valves have proven their versatility and reliability in a wide range of clear water applications.
- Protect drinking water from contamination by backflow resulting from gravity, backsiphonage or backpressure. (Example: Hose connected kitchen faucet or shower hand spray.)
- For the catering industry to prevent siphon electronic equipment for fluid gravity drip. (Example: coffee machine, water machine, beverage machine)
- Protect sensitive equipment against possible damage or contamination resulting from a reversal of flow direction. (Example: Water meter, pump or filter.)
- Hold water in a system or pipe after the flow has been turned off to prevent drainage or facilitate restart. (Example: Pumping systems.)
- Prevent crossover flow in systems with unequal line pressures. (Example: Cold and hot water inlets in thermostatic mixers.
- Reduce the risk of backflow or leakage in case of valve failure. (Example: Solenoid valve at the inlet of an appliance.)
- Allow complex systems to function properly by ensuring unidirectional flow. (Example: Multi-zone heating system or booster pumps.)
|Material||Acetal housing, core, cover; EPDM O-Ring; SS304 Spring|
|Size||8mm to 50mm|
|Max Pressure||230 Psi|
|Max temperature||100 C (212F)|
|Production Capacity||1,000,000 pcs each month|
|Packing Details||Poly bag, out carton and pallet.|
|Payment Term||T/T, PAYPAL, WESTERN UNION|
|Delivery Time||3-20 days after confirming the order|
|Minium Order Quantity||2000 pcs|
|Certificate||ROHS, ACS, FDA, REACH|
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.
We accept T/T, L/C, Paypal, western union,etc.
For regular fittings below 20 pcs, free samples against your courier account or you pick up from us.
For custom items, we will discuss by email.
We assure you 1 year policy after shipment. If there is any problem during this period, please contact us for support.