Duckbill valve by elastic neoprene and man-made fiber, processed by special shaped like a duck mouth, so called duckbill valve. In the case of internal pressure, the duck mouth export folded in itself under the action of the elastic; gradually increased along with the internal pressure, the duck mouth export increases gradually, can keep the liquid in the high velocity unleashed. Widely used in the coast, the beach, dock, reservoir, municipal human activities, drainage, is a green environmental protection valve. Below for rubber duck mouth valve body material to do detailed introduction:
1, rubber slow close check valve with a variety of special rubber mixing, vulcanization and rubber formula, according to different medium, the positive pressure and among the largest pressure valve, determine the rubber formula, the user when the choose and buy should indicate the medium and the forward and reverse pressure;
2, rubber slow close check valve rubber structure, for the whole body parts shaw hardness is different, the installation part hardness is biggest, confined area second, his lips part minimum;
3, rubber slow close check valve minimum positive opening pressure is less than 0.0005 MPa, the equivalent of 5 cm water column, in the open, under the static once formed among the pressure, the valve automatically shut down;
4, installed in the pump outlet of duckbill valve in the valve under high back pressure, can add in the valve body negative pressure device or on the water pump and the vacuum valve (valve);
5, duckbill valve body is made of neoprene, using elastic colloid and reinforcing fiber between rubber layer, ensure the valve use for a long time not to take off layers, deformation, aging, and prolong its service life
