Wenzhou pneumatic brake valve, qualitative description and purpose

wenzhou pneumatic brake valve, qualitative description and use description: pneumatic brake valve application industry more widely, and the principle of work is not complicated, half is the need to work with medium. And the vast majority of pneumatic brake valve is sealed with mandatory, the pneumatic valve is closed, to rely on outside force forced the ram pressure to the pneumatic seat, to ensure the sealing surface sealing.
a pneumatic valve, wenzhou pneumatic brake material description
, pneumatic valve stem material, strive for stainless steel pneumatic valve stem ( CR, large diameter pneumatic valves should also be embedded package of stainless steel stem.
, nut material, the use of aluminum, brass or aluminum bronze and hardness and strength is greater than the pneumatic valve stem.
, pneumatic valve stem bushing material, its hardness and strength shall be no greater than the pneumatic valve stem, and soaking in the water condition and pneumatic, pneumatic valve stem don't form the electrochemical corrosion.
, pneumatic valve body material, should with nodular cast iron, cast steel, stainless steel, L is given priority to, and let us know the brand and the physical and chemical testing data of cast iron practice.
and materials of sealing surface differ
(1) general pneumatic wedge gate valve, the material of copper ring, fixed way and grinding way shall specify;
2. Soft sealing gate pneumatic valve, pneumatic valve plate rubber lining material physical chemistry and health testing data;
(3) pneumatic pneumatic valves have different categories, different sealing methods and material requirements;
(4) butterfly pneumatic valve pneumatic sealing surface on the valve body material and butterfly plate must be marked on the sealing surface material; Their physical and chemical testing data, especially the health requirements of rubber, ageing resistance, wear resistance; Usually use NBR and epdm and so on, are strictly forbidden to mixed with reclaimed rubber.
, pneumatic valve shaft packing
(1) due to pipe network in pneumatic pneumatic valve, usually open/close not frequent, packing in a few years no activity, the packing is not aging, long sealing effect;
2. Pneumatic valve shaft packing should also be under the frequent opening and closing, good seal effect;
3. In view of the above requirements, the pneumatic valve shaft packing to lifetime don't change or more than ten years will not be changed;
(4) packing if need to change, should consider to have hydraulic pneumatic pneumatic valve design conditions change.
2, wenzhou pneumatic brake characteristics
the purpose of the pneumatic valve, purpose is a quarter-turn structure, it has to do with pneumatic valve positioner, proportional control can be realized; V pneumatic valve core is the most suitable for all kinds of regulating occasions, with large rated flow coefficient, adjustable than large, good sealing effect and zero regulation performance, small size, can be installed in vertical lie. Apply to control gas, steam, liquid medium.
, pneumatic piston actuators using compressed air as power source, through the movement of the piston drives the crank arm for degrees of rotation, to make the pneumatic valve open/close automatically. Part of it is: the adjusting bolt, actuator housing, crank arm shaft, piston, connecting rod, cylinder block, cylinder, cardan shaft.
the working principle of pneumatic valve, pneumatic control, pneumatic control pneumatic valve is made up of actuators and regulating mechanism. Actuator is adjust the thrust part of pneumatic valve, it according to the size of the control signal pressure produce corresponding thrust, promote regulating mechanism. Pneumatic valve body is the adjustment of the pneumatic valve pneumatic control components, it is directly contact with control agent, regulating the flow of the fluid.
and characteristics: a quarter-turn structure, by V pneumatic valve, actuator, positioner of and other accessories. There is a best than the intrinsic flow feature of such as approximation; With double bearing structure, small starting torque, has excellent sensitivity and speed of induction; Strong ability of shear.