In accordance with the automatic valve and drive, purpose and role, technical parameters, structural characteristics, structural principle of the valve to classif
1, an automatic valve 』rely on media (liquid, air, steam, etc.) their ability to self-action valves. Such as safety valve, check valve, relief valve, steam traps, steam trap air solenoid valve, emergency shut-off valves, etc.
2, drive with manual valves, electrical, hydraulic or pneumatic valves to manipulate. Such as gate valve, stop valve, throttle valve, butterfly valve, ball valves, plug valves, etc.
1, cut-off Valves mainly used for cut-off or pipe connected to the media stream. Such as cut-off valve, gate valve, ball valves, plug valves, butterfly valves, valve, etc.
2, category for non-return valve to prevent backflow medium. A variety of different structures such as the non-return valve
3, valve type primarily for regulating the pipe pressure and flow media. Such as control valve, throttle valve, relief valve, etc.
4, shunt valve type pipe used to alter the direction of medium flow, from distribution, streaming or mixed media role. The distribution of various structures such as valves, cocks three or four, three or four-way ball valves, various types of traps, etc.
5, type safety valve for overpressure protection, emissions redundant media, to prevent the stress exceeds the set value. 如各种类型的安全阀 Such as various types of safety valve
6, Valves for alternative two, three or even more types of valves. Such as closing non-return valve, check globe valves, safety valves, such as deadline-return
7, other special dedicated Valves such as sewage valve, emptying valve, Qing Jiao valves, pigging valves, etc.
DN according to the classification of the valve
1, small-caliber valve 』『 DN DN ≤ 40mm valve
2, Medium-caliber valve 』『 DN valves DN50-300mm
3, large diameter valves 』『 DN valves DN350-1200mm
4, large diameter valves 』『 DN DN ≥ 1400mm val
Nominal pressure valve according to the classification of
1, vacuum valves 』『 job stress less than the standard atmospheric pressure valve
2, low pressure valve Nominal pressure PN ≤ 1.6MPA valves
3, medium-pressure valve 』『 PN2.5-6.4MPA Nominal pressure valve
4, high-pressure valve 』『 PN10.0-80.0MPA Nominal pressure valve
5, 』『 ultra-high pressure valve Nominal pressure PN ≥ 100MPA valve
By medium temperature valve job classification
1, high temperature valve 』『 t> 450 ℃ valve
2, valve 』『 temperature 120 ℃ ≤ t ≤ 450 ℃ valve
3, valve 』『 room temperature -40 ℃ ≤ t ≤ 120 ℃ valve
4, low temperature valve 』『 -100 ℃ ≤ t ≤ -40 ℃ valve
5, 』『 ultra-low temperature valve t <-100 ℃ valve
Valve Body Materials in accordance with the classification of
1, valve 』『 non-metallic materials such as ceramic valves, glass fiber reinforced plastic valves, plastic valves
2, 『』 valve metal materials such as copper alloy valves, valve aluminum alloy, lead alloy valves, titanium valves, monel alloy valves, cast iron valves, cast steel valves, low-alloy steel valves, high alloy steel valves
3, 『』 valve metal lining body such as lead-lined valves, plastic lined valves, valve enamel lining
According to the connections and pipeline valve classification
1, 『』 body flange connection on the valve with flange, with the pipe flange connection of the valves used
2, 『』 Body thread connection on the valve with internal thread or external thread, the use of threaded connections and pipeline valves
3, 『』 welding to connect the valve with a valve on Welded Joints with the pipeline to connect the use of welding valves
4, 『』 folder hoop connect the valve body with a folder on the mouth, and pipelines used to connect the valve folder hoop
5, 『』 card set to connect the valve card sets of valves and pipe connections
Valve by manipulating the way the classification
1, 『』 manual valves with hand wheels, handles, levers or sprocket, etc., from human to manipulate the valve. When the need to transmit larger torque when using worm, gear deceleration devices, etc.
2, 『』 valves with electric motor, electromagnetic or other electrical installations in the manipulation of valves
3, 『』 hydraulic or pneumatic valves with the liquid (water, oil and other liquid medium) or air pressure control valve
1, door-shaped 』『 cut down turn off pieces of the center line of mobile Valve base
2, turn off the gate-shaped pieces down the center line perpendicular to the direction of mobile Valve base
3, cocks and turn off pieces are spherical plunger, cone plug or ball around its own axis of rotation
4, Swing-shaped pieces around the turn off Valve base outside the rotation axis
5, butterfly turn off pieces of the disc around the valve seat within the rotation axis (center line) or around the seat outside the rotation axis (eccentric type) structure
