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The comparison of wafer check valve and flange swing check valve

                   H76 wafer type bivalve butterfly check valve                                           H44 flange univalve swing check valve

structure type H76 wafer type bivalve butterfly check valve H44 flange univalve swing check valve
Water hammer pressure Water hammer pressure, disc have a short trip, close valve spring assisted closed fast speed Water hammer pressure, disc longer journeys, it takes a long time to close
H76 Water hammer pressure only H44 type 1/2-1/5
Size and weight A short length of structure, small volume, light weight, easy installation, the valve handling, storage and piping layout, and can save material and reduce cost The structural length is very long, large volume, weight is very stupid
H76 The type of structure length H44 only 1/4 ~ 6, H76 type 1 / weight only H44 type 1/4-1 in 10
Fluid resistance A small resistance and fluid flow resistance coefficient ζ for 2.6 ~ 0.7, with the increase of valve size, fluid resistance coefficient decreases A small resistance and fluid flow resistance coefficient ζ 1.3 ~ 3, but in low-pressure conditions cannot be completely open, disc, fluid resistance. Fluid resistance with the valve size increases
installation Can be installed horizontally or vertically, light weight, need for valve setting bearings Can be installed horizontally or vertically, large diameter valve weight, need to install bearings
Open pressure Open valve, pressure is in small pressure differentials can fully open Open valve, pressure in the larger pressure differentials can fully open
Reliability The valve for the whole structure, simple and compact, valve closed wallop, water hammer pressure small small, long service life, high reliability valve Check valve closes the huge impact and water hammer pressure easily
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