What is the appearance of the valve with no stem valve?
4, drive mode is classifiedThe peso (1) does not require an external drive in the automatic valve device, but acts on the media's own energy valve action. Such as safety valve, pressure reducing valve, steam trap, check valve, automatic control valve.Day (2) power driven valve: power driven valve can be driven by a variety of power sources. Product display - electric valve: electric drive valve.Pneumatic valve: driven by compressed air valve.Hydraulic valves: valves driven by oil and liquid pressure.In addition, there are more than several driving modes, such as gas combinations - electric valves.Pesos (3) manual valves: manual valves, hand wheels, handles, levers, sprockets, operated by human resources to operate the valve. When the valve opening and closing torque is greater, the round or worm gear can be set between the handwheel and valve stem. If necessary, you can use the cardan joint and the drive shaft for remote operation.
2, classified by namePeso (1) vacuum valve: work pressure below standard atmospheric pressure valve is lower.Day (2): refers to the low pressure valve nominal pressure PN, a, 1.6Mpa valve.Peso (3) pressure valve: 2.5,4.0,6.4Mpa valve nominal pressure PN.Peso (4) high pressure valve: refers to the worker called PN 1080MPa pressure valve.Peso (5) high pressure valve: refers to the nominal PN, a100Mpa valve.3, according to the work temperature classificationPeso (1) ultra low temperature valve: used for medium temperature valve, <-100 tons or so.Day (2) low temperature valve: for medium temperature of -100 DEG a valve, t, a, -40 degrees celsius.The peso (3) with the valve: the valve at room temperature is -40 DEG C, a, t, a, 120 degrees Celsius temperature.The peso (4) at the temperature valve: used at medium temperature of about 120 degreesDay (5) high temperature valve: used for medium temperature, T> valve, about 450 degrees celsius.
1, according to the classificationThe role of the (1) cut-off valve and purpose: stop valve, also known as closed valve, whose role is to connect or disconnect the line media. Globe valves include gate valves, globe valves, plug valves, ball valves, butterfly valves, and diaphragm valves.(2) check: check valve, also known as one-way valve or check valve, its role is to prevent the medium back of the pipeline. Pump water off the valve check valve also belongs to the class.(3) safety valve: in the role of the class is to prevent the pipeline safety valve or device in the medium pressure exceeds the specified value, so as to achieve the purpose of safety.Peso (4) control valve: valves include regulating valves, throttle and relief valve, the role is to regulate the media pressure, flow and other parameters.Pesos (5) shunt valve: diverter valve, including a variety of distribution valves and traps, etc., the role is to distribute, separation or mixed media lines.
Limiting valve: in the fluid system "valve"Define the flow direction of the flow by means of pressure control. The pipe and valve are a medium (liquid, gas, powder) that stops flowing within the device and can control the flow of the device. According to the open and close valve
