1.ISO9001:2008 approved . 2.High pressure ageing resistance seamless rubber . 3.Good quality and competitive service .

Rubber Back Valve,appearance of duck bill shape , 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.

Outstanding Character : br> A)Auto open and close due to water pressure difference , well safe and secure ,no noise , with out need human to operate or maintain and keep up .B)Foward open ,the resistance is small , starting pressure is small ,the flow rate depend on water pressure . C) Great tightness ,no leak ,advoid back flow , back presure go up , better performance . D)Resistance to corossion ,aging ,deformation ,with long using life . E)Wide range of size , DN 50--DN30001)Excellent performance and wide application rang 2)Applicable for sewage system3)Applicable for drainage4)Applicable for dyke discharge 5)Applicable for diainage of airport ,high way6) Applicable for drainage 7)Applicable for drainage 8)Odor barrier 1)Mosaic XF-X be installed in the pipe of rain and sewage in cities 2)Belled XF-T be installed at the exit of drainage pipe 3)Flanged XF-F be installed on the building at the water exit end .4)Mounting plate XF-F be installed on the building at the water exit end 5)Build in XF-F be installed at the exit end of rain and sewage system in city6)Grout or cement pipe XF-T be installed at the end

SizeDN	Mosaic XF-X rubber back valve			Flanged XF-F rubber back valve			Belled XF-T rubber back valve
	Length	Height	Diameter of flange C	Length	Height	Diameter Of Flange	Length	Height	Depth
50	125	47	150	150	100	150	158	100	25
80	175	72	200	220	140	200	232	140	40
100	225	97	225	250	200	225	270	200	40
150	320	47	275	340	265	275	360	265	50
200	375	197	338	420	325	338	450	325	50
250	475	247	400	520	425	400	560	425	75
300	560	297	485	620	525	485	650	525	115
350	625	344	525	700	625	525	750	625	115
400	700	394	588	800	725	588	850	725	135
450	780	444	625	900	825	625	950	825	150
500	880	494	688	980	925	688	1060	925	200
600	1000	494	800	1120	1025	800	1200	1025	200
700	1100	694	969	1180	1125	969	1260	1125	200
800	1260	794	1080	1350	1400	1080	1450	1400	250
900	1400	894	1150	1500	1525	1150	1620	1525	250
1000	1520	988	1325	1600	1725	1325	1720	1725	250
1200	1725	1188	1485	1840	1950	1485	2010	1950	300
1400							2280	2320	320
1600							2600	2650	350
1800							2920	2960	400
2000							3150	3300	450
2200							3450	3580	500
2400							3760	3925	550
2600							3900	4250	600
2800							4200	4580	650
3000							4500	4990	700

Flanged Connection Rubber Back Valve