First, the product introduced that,
　The LS21X-16T antifouling room partition valve uses in preventing the life tap water pipeline has the backflow pollution safety device, prevents the tap water backflow pollution novel
　The valve, by guarantees the life tap water the health and the security.
　Second, product structure:
　The LS21X-16T safe antifouling room partition valve is composed by two levels of prevent returnings systems and a draining water decompression system. On draining water decompression system cavity and first level of prevent returning system import end connection. (Chart one)
First, the second prevent returning system mainly by the valve body, the water inlet attachment, the valve petal, the gasket, the spring and so on is composed.
The draining water decompression system mainly by the valve cover, the diaphragm, the valve core, the gasket, the freeing port, the spring, air being cut off and so on is composed.
Third, principle of work:
　The LS21X-16T antifouling room partition valve is additionally builds a draining water decompression installment in two levels of prevent returnings systems, like this since also two levels of prevent returnings seals destroys, it also can play to prevents the backflow pollution the role. Its principle of work:
1.Normal water supply:
　A.The clean municipal administration lives the running water from the first level of prevent returning system after the water ejector to the second level of prevent returning system exportation to the user water supply, the first level of prevent returning system import high pressure water enters in the draining water mutual lack of understanding the cavity, but under the mutual lack of understanding the cavity (second level of check valve imports) with the first level of check valve exportation is interlinked, as a result of its existence certain differential pressure, impels under the valve petal to move, water ejector closure, antifouling room partition valve normal water supply;
　B.After the valve the pipeline does not have the user, water static, like the inlet pressure maintenance is invariable, its around had the differential pressure, the water ejector still assumes the off-position;
　C.Like the inlet pressure drops, its around differential pressure drops to when comes off duty, the spring impels the valve core to be upward, the water ejector opens the decompression, the decompression to when restores the certain pressure interpolation with the inlet pressure, the water ejector closes.
　2.The seal malfunctions when:
　After antifouling room partition valve when pipe network pressure lifting, surpasses in front of the valve the inlet pressure, like the second check valve seal complete does not have the leakage, the high-pressured water cannot flow backwards, about the water ejector mutual lack of understanding maintains the original differential pressure, the water ejector closure, not decompression. When the second check valve seal destruction has the leakage, in front of second level of check valve pressure lifting, creates about the water ejector mutual lack of understanding the differential pressure to reduce, the water ejector opens, draining water decompression: This time, like at the same time the first level of check valve seals destroys, because the second level of check valve flows backwards high-pressured water already decompression water already decompression reduced pressure, therefore cannot flow backwards the first level of check valve.
　3.Like in the water supply process supplies water the pressure to drop unceasingly, then on the water ejector mutual lack of understanding the drop of pressure, the security water ejector controlling spring impels the valve core to open water ejector draining water. When the inlet pressure drops to the zero or the negative pressure, the water ejector opens completely, the water discharges, the air enters the real cavity from the water ejector, thus prevented produces the rainbow to attract flows backwards the phenomenon.
　Fourth, main performance parameter:
　Working pressure: 1.6Mpa
　Use medium: Pure water
　Medium temperature: ≤ 60 C
　Fifth, antifouling room partition valve installment spot:
　1.The running water pipe network turns on the user to meet behind the user water meter.
　2.On the domestic water pipeline leads the non- life tap water and dumps pollutants the tube, installs with leads the tube beginning.
　3.On the life tap water water tank water inlet pipe (water tank base enters when water).
　4.On the life tap water pipeline connects pressurizes when installs in pumps on the induction manifold.