Valve According To Main Parameters
Apr 04, 2024| According to nominal pressure:
(1) Vacuum valve: refers to a valve whose working pressure is lower than standard atmospheric pressure.
(2) Low pressure valve: refers to valves with nominal pressure PN ≤1.6Mpa.
(3) Medium pressure valve: refers to valves with nominal pressure PN of 2.5Mpa, 4.0Mpa, and 6.4Mpa.
(4) High-pressure valve: refers to a valve with a nominal pressure PN of 10.0Mpa ~ 80.0Mpa.
(5) Ultra-high pressure valve: refers to valves with nominal pressure PN≥100.0Mpa.
According to operating temperature:
(1) Ultra-low temperature valve: used for valves with medium working temperature t<-101℃.
(2) Normal temperature valve: used for valves with medium working temperature -29℃<t<120℃.
(3) Medium temperature valve: used for valves with medium working temperature 120℃<t<425℃.
(4) High temperature valve: used for valves with medium working temperature t>425℃.
According to driving mode:
According to the driving mode, it can be divided into automatic valves, power-driven valves and manual valves.
According to nominal diameter
(1) Small diameter valve: valve with nominal diameter DN≤40mm.
(2) Medium diameter valve: a valve with a nominal diameter DN of 50 to 300mm.
(3) Large diameter valve: a valve with a nominal diameter DN of 350 to 1200mm.
(4) Extra large diameter valve: valve with nominal diameter DN≥1400mm
According to structural characteristics
The structural characteristics of the valve can be divided into: according to the direction of movement of the closing member relative to the valve seat:
(1) Cut-off shape: the closing member moves along the center of the valve seat; such as a stop valve
(2) Plug and ball: The closing member is a plunger or ball, which rotates around its center line; such as plug valves and ball valves
(3) Gate shape: the closing member moves along the center of the vertical valve seat; such as gate valves, gates, etc.
(4) Swing type: The closing member rotates around the axis outside the valve seat; such as swing check valve, etc.
(5) Butterfly: The disc of the closing member rotates around the axis in the valve seat; such as butterfly valve, butterfly check valve, etc.
(6) Slide valve shape: The closing member slides in the direction perpendicular to the channel. slippery