Introduction :

Ruber back valve is also named Pipe rubber back valve ,rubber dirt dischage back valve ,ruber micro resistance back valve ,duch mouth valve ,pipe back valve . whole rubber structure ,with duch mouth shape ,with character of "Forward flow, reverse Check" new type water drainage product.Depend on pressure analysis and stress calculatioin,for different conditions,use different design mechanism,use different rubber foumulations,according to special technology to produce.Forward working ,the water flow form the inlet,small water pressure could open the valve ,the larger of the water pressure ,the greater the valve opening.reverse work,the valve close auto,sealed stop,the back pressure is higher,valve port is more tightly.sealing better ,it is widely used for municipal ,irrigation ,sewage and other effuent discharge to prevent back flow,back is the ideal replacement to door.
We are professional manufacturer of rubber back valve ,which is our patent product Patent number : ZL200320113496.0
Divided into : Inlay,Slleeve,flange,Installation plate, built-in, such as mortar or cement Pipe .
Material of flange/clamp : ,A3 , Q235¡¢S201¡¢S304¡¢S316 .
Material of rubber : NR¡¢EPDM¡¢NBR¡¢NEOPRENE¡£
Unique patent - can be curved flexible telescopic valve, (patent number: 96112556.X), with high pressure (1.0 ~ 2.5MPa), good flexibility (can be axial, lateral and angular displacement), light weight, reduced vibration, lower noise (under normal circumstances, can reduce structural transmission of noise from 10 to 15 dB), the flange is free to rotate properties. Easy to install, flexible, easy to replace them maintenance, acid, alkali, oil and so on. The body is equipped with pressed rings, used for a period of time, adjustable squeeze ring, continue to use, the Director of life, therefore, the valve can be used in metallurgy, chemical industry, water supply and drainage, construction and other fields.

Outstanding advantage :
A)Open and close automatically in security and reliablity according to hydraulic difference without noise and in no need of operator and maintenance.
B)Positive start has little water resistance and start up pressure and the flow can be adjusted naturally according to hydraulic presure .
C)Reserve cut offer ahs good seal without leakage to prevent from flowing back wards,the back pressure is higher and the effect is better.
D)Anticorrosion,agingresistance,deformationresistance,strong adaptability and long use life .
E)Wide size scope .nominal diameter of DN50--3000

1) Excellent performance and wide application range
2) Applicable for sewage system
3) Applicable for drainage
4) Applicable for dyke discharge
5) Applicable for diainage of airport ,high way
6) Applicable for drainage
7) Applicable for drainage
8) Odor barrier