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HW forged check valves are designed and manufactured in accordance with API 602, ISO 15671, ASME B16.34 and pressure tested in accordance with API 598. The forged steel check valve series is available in three bonnet designs: bolted bonnet, welded bonnet and pressure self-sealing bonnet. It can meet the design of ultra-low temperature forged steel check valve, ball lifting check valve design, Y-type lifting check valve design.