General classification This classification only <br> <br> accordance with the principles, the role and structure in accordance with the division within the most current international and national common classification.
Divided into: gate valve, globe valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, pressure reducing valve, safety valve, steam trap, regulating valve, bottom valve, filtration Equipment, sewage valve, etc.
There are several valves a classification, the classification according to the driving mode <br> <br> automatic valve: automatic valves without driving force, relying on its own power to drive the valve medium. Such as safety valves, pressure relief valves, traps.
Power Drive Valves: Power Drive Valves can be powered using a variety of power sources. (Electric valves act on electrically driven valves; pneumatic valves are actuated by compressed air; hydraulic valves are actuated by hydraulic pressures such as oil; in addition, there are combinations of several types of drive, such as gas-electric valves, etc.)
Manual valve: The manual valve uses the handwheel, handle, lever and sprockets to maneuver the valve. When the valve closing torque is large, a gear or worm gear reducer can be provided between the hand wheel and the valve stem. When necessary, it is also possible to use a universal joint and a transmission shaft for long-distance operation.
Second, the role of classification according to the purposes and the cutoff valve <br> <br>: truncated or connected to the medium pipe. Such as gate valve, globe valve, ball valve, butterfly valve, diaphragm valve, plug valve and so on.
Check valve: used to prevent the back flow of media in the pipeline. Such as check valve (bottom valve).
Dispense valve: used to change the direction of the media, to distribute, separate or mix media. Such as three-way ball valve, three-way plug valve, distribution valve, traps and so on.
Regulating valve: used to regulate the pressure and flow of the media. Such as pressure reducing valve, regulating valve, throttle valve and so on.
Safety valve: To prevent the medium pressure in the device from exceeding the specified value, and to discharge excess media, thus providing overpressure safety protection for pipelines or equipment. Such as safety valves, accident valves and so on.
Other special-purpose valves: such as traps, vent valves, drain valves, etc.
Third, according to the classification of the valve nominal pressure vacuum valve <br> <br>: working pressure below standard atmospheric pressure valve.
Low pressure valve: Nominal pressure PN ≤ 1.6MPa valve.
Medium pressure valve: Nominal pressure PN is 2.5 ~ 6.4MPa valve.
High pressure valve: nominal pressure PN is 10 ~ 80. OMPa valve.
Ultra-high pressure valve: Nominal pressure PN ≥ IOOMPa valve.
Fourth, according to the temperature of the medium free <br> <br> Chang Wen valves: a valve 40 ℃ ≤f≤120 ℃ for medium temperature.
Medium temperature valve: For valves with media operating temperature 120°C<£≤450°C.
High temperature valve: used for the medium working temperature t ≤ 450 °C valve.
Cryogenic valve: For valves with medium operating temperature - l00°C ≤ t ≤ 40°C.
Ultra-low temperature valve: Valve used for medium working temperature £ < l00 °C.
Fifth, in accordance with the nominal diameter classification <br> <br> smaller size valves: nominal diameter DN≤40mm valve.
In the diameter of the valve: nominal diameter DN is 50mm ~ 300mm valve.
Large diameter valve: Nominal diameter DN 350mm ~ 1200mm valve.
Large diameter valve: nominal diameter DN ≥ 1400mm valve.
Six, classified according to the structure wherein the gate-shaped cross <br> <br>: opening and closing member (the flap) by a stem drive for the lifting movement along the centerline of the valve seat.
Gate shape: The opening and closing part (the gate) is driven by the valve stem to move vertically along the centerline of the valve seat.
Plug shape: The opening and closing member (cone or ball) rotates around its own centerline.
Special swivel shape: The opening and closing element (valve) rotates around the axis outside the valve seat.
Butterfly: The opening and closing member (disc) rotates around the fixed axis in the valve seat.
Sliding valve shape: The opening and closing piece slides in the direction perpendicular to the channel
Seven, classified according <br> <br> screw valves connections: a valve body with an internal or external thread, a threaded pipe connection.
Flange connection valve: The valve body is flanged and connected to the pipe flange.
Welded connection valve: The valve body has a welding groove and is welded to the pipe.
Clamp connection valve: The valve body has a clamp and is connected to the pipe clamp.
The card sleeve connects the valve: The valve is connected with the sleeve and the pipe is connected with the valve and the clip is connected with the valve: the bolt is used to directly clamp the valve and the two ends of the pipe together.
Eight, <br> metal material in accordance with the valve body material classification <br>: valve body and other parts made of a metallic material. Such as cast iron valves, carbon steel valves, alloy steel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titanium valves, Monel alloy valves.
Non-metallic valve: its valve body and other parts made of non-metallic materials. Such as plastic valves, ceramic valves, enamel valves, glass and steel valves.
Metal body lining valve: The body of the valve body is metal, and the main surface of the interior where it comes in contact with the medium is a lining such as a rubber lined valve and a lined plastic valve.
Divided into: gate valve, globe valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, pressure reducing valve, safety valve, steam trap, regulating valve, bottom valve, filtration Equipment, sewage valve, etc.
There are several valves a classification, the classification according to the driving mode <br> <br> automatic valve: automatic valves without driving force, relying on its own power to drive the valve medium. Such as safety valves, pressure relief valves, traps.
Power Drive Valves: Power Drive Valves can be powered using a variety of power sources. (Electric valves act on electrically driven valves; pneumatic valves are actuated by compressed air; hydraulic valves are actuated by hydraulic pressures such as oil; in addition, there are combinations of several types of drive, such as gas-electric valves, etc.)
Manual valve: The manual valve uses the handwheel, handle, lever and sprockets to maneuver the valve. When the valve closing torque is large, a gear or worm gear reducer can be provided between the hand wheel and the valve stem. When necessary, it is also possible to use a universal joint and a transmission shaft for long-distance operation.
Second, the role of classification according to the purposes and the cutoff valve <br> <br>: truncated or connected to the medium pipe. Such as gate valve, globe valve, ball valve, butterfly valve, diaphragm valve, plug valve and so on.
Check valve: used to prevent the back flow of media in the pipeline. Such as check valve (bottom valve).
Dispense valve: used to change the direction of the media, to distribute, separate or mix media. Such as three-way ball valve, three-way plug valve, distribution valve, traps and so on.
Regulating valve: used to regulate the pressure and flow of the media. Such as pressure reducing valve, regulating valve, throttle valve and so on.
Safety valve: To prevent the medium pressure in the device from exceeding the specified value, and to discharge excess media, thus providing overpressure safety protection for pipelines or equipment. Such as safety valves, accident valves and so on.
Other special-purpose valves: such as traps, vent valves, drain valves, etc.
Third, according to the classification of the valve nominal pressure vacuum valve <br> <br>: working pressure below standard atmospheric pressure valve.
Low pressure valve: Nominal pressure PN ≤ 1.6MPa valve.
Medium pressure valve: Nominal pressure PN is 2.5 ~ 6.4MPa valve.
High pressure valve: nominal pressure PN is 10 ~ 80. OMPa valve.
Ultra-high pressure valve: Nominal pressure PN ≥ IOOMPa valve.
Fourth, according to the temperature of the medium free <br> <br> Chang Wen valves: a valve 40 ℃ ≤f≤120 ℃ for medium temperature.
Medium temperature valve: For valves with media operating temperature 120°C<£≤450°C.
High temperature valve: used for the medium working temperature t ≤ 450 °C valve.
Cryogenic valve: For valves with medium operating temperature - l00°C ≤ t ≤ 40°C.
Ultra-low temperature valve: Valve used for medium working temperature £ < l00 °C.
Fifth, in accordance with the nominal diameter classification <br> <br> smaller size valves: nominal diameter DN≤40mm valve.
In the diameter of the valve: nominal diameter DN is 50mm ~ 300mm valve.
Large diameter valve: Nominal diameter DN 350mm ~ 1200mm valve.
Large diameter valve: nominal diameter DN ≥ 1400mm valve.
Six, classified according to the structure wherein the gate-shaped cross <br> <br>: opening and closing member (the flap) by a stem drive for the lifting movement along the centerline of the valve seat.
Gate shape: The opening and closing part (the gate) is driven by the valve stem to move vertically along the centerline of the valve seat.
Plug shape: The opening and closing member (cone or ball) rotates around its own centerline.
Special swivel shape: The opening and closing element (valve) rotates around the axis outside the valve seat.
Butterfly: The opening and closing member (disc) rotates around the fixed axis in the valve seat.
Sliding valve shape: The opening and closing piece slides in the direction perpendicular to the channel
Seven, classified according <br> <br> screw valves connections: a valve body with an internal or external thread, a threaded pipe connection.
Flange connection valve: The valve body is flanged and connected to the pipe flange.
Welded connection valve: The valve body has a welding groove and is welded to the pipe.
Clamp connection valve: The valve body has a clamp and is connected to the pipe clamp.
The card sleeve connects the valve: The valve is connected with the sleeve and the pipe is connected with the valve and the clip is connected with the valve: the bolt is used to directly clamp the valve and the two ends of the pipe together.
Eight, <br> metal material in accordance with the valve body material classification <br>: valve body and other parts made of a metallic material. Such as cast iron valves, carbon steel valves, alloy steel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titanium valves, Monel alloy valves.
Non-metallic valve: its valve body and other parts made of non-metallic materials. Such as plastic valves, ceramic valves, enamel valves, glass and steel valves.
Metal body lining valve: The body of the valve body is metal, and the main surface of the interior where it comes in contact with the medium is a lining such as a rubber lined valve and a lined plastic valve.
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