The API 594 A-Type wafer dual plate swing type check valve is an automatic valve that relies on media pressure to open and close. It is installed in the piping system and its main function is to prevent the medium from flowing backwards. The valve stroke is short, the valve flap is light, the spring is assisted to close, and the valve closing speed is fast. The structure length is short, the volume is small, and the weight is light, which brings great convenience to the installation, handling, storage and arrangement of the valve, and can save a lot of materials and reduce the cost. It has four different types: double plate check valve, single flange check valve, solid lug check valve and WCB check valve.
It can be installed horizontally or vertically, and it is light in weight. It is not necessary to set a bracket for the valve.
The fluid resistance is small, the opening pressure is small, and the valve flap can be fully opened under a small pressure difference.
The overall structure is simple and compact, the impact force is small when the valve is closed, and the water hammer pressure is small.
The valve has a long service life and high reliability.
STANDARDS & SPECIFICATIONS:
Main materials: carbon steel, low temperature steel, duplex steel, SS304, SS316 and other metal materials.
Design and manufacture: API594, API6D, ASME B16.34.
Pressure and temperature class: CLASS 150 - 300
Test and inspection: API598, API 6D, ISO5208
Flange: ASME B16.5, ASMEB16.47
Face to face dimensions: ASME B16.10 / API 6D
BW ENDS: ASME B16.25
Socket welding ends: ASME B16.11
Threaded ends (NPT): ASME B16.11
Fire safe design: API 607 / API 6FA
NORMAL DIAMETER: NPS 1/2″-48″
SUITABLE TEMPERATURE: -29℃ - 450℃
PORT TYPE: FULL PORT
CONNECTION ENDS: RF / NPT / BW / SW
STEM MATERIAL: N/A