Choose check standard, flywolf know

1, in order to prevent medium counter-current, shall be installed in equipment, devices and pipeline check valve; 2, the check valve generally applies to clean medium, should not be used in medium containing solid particles and viscosity is bigger; 3, generally on the level of nominal menstruation 50 mm pipe should be choose vertical lift check valve; 4, cut-through lift check valve can be installed in horizontal and vertical pipe. 5, for import pipeline pumps, appropriate chooses bottom valve, bottom valve installed in the pump only commonly imported vertical pipe runs, and the medium flows from bottom to top; 6, elevating the swing sealing good, fluid resistance is big, horizontal should be installed in horizontal pipe runs with vertical installed in vertical pipe runs; 7, swing check valve installation position is not restricted, and it can be installed in a horizontal, vertical or inclined line, such as in a vertical pipe runs, the medium flows from bottom up; 8, swing check valves should not be made into a small-bore valves, can make high working pressure, the PN can be up to 42 mpa, and DN also can do a lot, the maximum can reach more than 2000 mm. According to the shell and packing material can be applied to any working medium and any working temperature range. Medium for water, steam, gas, corrosive medium, oil, medicine, etc. Medium in - working temperature range 196 - - Between 800 ℃; 9, applicable occasions are low pressure, large diameter and installations is restricted; 10, butterfly check valve installation position is not restricted, can be installed in a horizontal pipe road, also can be installed in vertical or inclined line; 11, the diaphragm type check valve is suitable for easy produce water hammer on the pipeline, the diaphragm is a good way to eliminate water hammer produced by a dielectric upstream, it is generally used in low pressure pipe at room temperature, especially suitable for the water pipe, the working temperature in a normal medium - 12 - - Between 120 ℃ and work pressure