High Pressure Swing Check Valve High Pressure Swing Check Valve API 6D Design CLASS 1500 Size:10 ... DIN259/29992, silica sol and hot investment casting stainless steel Valve body Bonnet Petal. 3, application: water, gas, ... workshops, tourism building, industrial pipeline system, marine pipeline system, heating supply, gas pipeline system, and industrial petroleum pipeline system etc.Advantages: Strong ...