Nominal diameter: 8” ~ 48”
Pressure rating: class 150 ~ class 1500
Actuator: manual
Product features: ①Single-direction backflow prevention, pump or compressor protection; ②Piggable check valve; ③Quick closing + slow movement back to seat, preventing large quantity backflow and avoiding water hammer effect at the same time; ④Counter balance, manually operated.
Nominal Diameter: 3”~16”
Pressure Rating: Class 150~Class 1500
Product Feature: ①Two national innovative patent, two national utility model patent; ②No external energy, automatic quick pressure relief and slow closing; ③Originated design valve position displacement signal displacement and transmission function; ④Adjustable pilot valve open and close speed, suit for different application.