Flanged Check Valves

Introduction
Flanged check valve, also known as one way valve, non return valve or reflux valve, is installed on one-way flow pipelines. It is mainly made up of valve body, disc, bonnet and gasket. It is used to prevent backflow and leakage of medium in the pipe, such as fluid, gas, etc. This flanged valve is also applied to stop reversal of pump and driving motor.

Functions
The flanged check valve allows medium to flow through in only one direction, and prevents reverse direction flow. Disc opens and closes automatically depending on force from media flowing. Disc will open under the pressure of forward flow fluid. When fluid flows in reverse direction, the disc will be closed by fluid pressure and dead weight so as to cut off the flow.

Application
Flanged check valve (one way valve) can be widely applied in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, and other pipeline systems.

Advantages
1. Bead welding CO hard alloy sealing surface is of high wear, corrosion and friction resistance, which ensures long service life of sealing surface.
2. Hardening and tempering as well as surface nitriding makes the stem highly resistant to corrosion and friction.
3. Flanged check valves feature rational structure, reliable sealing, excellent performance and beautiful shape.
4. Double seal assures more reliable performance.
5. Listing position indication of stem is more intuitive.
6. Components material, flange and butt welding size are optional according to actual working conditions.
7. Our flanged valves have passed certification of API6D, DIN and CE.

Classification
1. According to structure, flanged check valves (one way valves) can be classified into lift type, swing type and butterfly type.
1) Lift type check valve can be classified into vertical type and horizontal type valve.
2) Swing type check valve can be divided into single plate, dual plates and multiple plates valve.
3) Butterfly type check valve is a straight through type valve.
2. According to connection type, the flanged check valves can be divided into threaded connection, flanged connection, welded connection and wafer connection valve.

Payment, Package, Transportation & Warranty
1. Flanged valves can be paid by T/T, D/P, D/A, L/C, and so on.
2. Standard exporting wooden cases are employed for packaging.
3. Items are transported by air, sea or railway.
4. All our flanged check valves (one way valves) have 18 months warranty.

Lanteky Valve Industry is a professional manufacturer of flanged valves in China. Our main products cover ball valves, gate valves, globe valves, check valves and strainers. Our flanged check valves (one way valves) are widely applied in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, and energy pipeline systems.