Self-reliance type pneumatic pressure control valve is introduced and illustrated

Self-reliance type pneumatic pressure control valve by using the principle of control oil with spring balance work, its working status directly affected by pressure control, its state is changing. Understanding the structures of pressure pneumatic valve, pneumatic valve under different working conditions, easy to master the job characteristics. When load pressure changes to keep the import and export of pneumatic valve throttle pressure difference to fixed value. At the throttle mouth area of setting later, no matter how change, load pressure control pneumatic valve can keep unchanged by the flow throttling pneumatic valve, so that the movement speed of executive element, the stable.
USES the energy of modulated medium to achieve automatic adjustment of the actuator products, is a quarter-turn structure, by V pneumatic valve, actuator, positioner of and other accessories, such as an approximation of best than the intrinsic flow feature of double bearing structure, the starting torque is small, has good sensitivity and speed of induction and shear capacity. Can work in places where no electricity, no gas, at the same time, save energy, pressure setting can be adjusted freely in the run. Use quick opening traffic characteristics, action quick, sealed performance is good, so it is widely used in petroleum, chemical, electric power, metallurgy, food, textile, machinery manufacturing and resident building blocks, and other industrial equipment in a variety of gas, liquid and steam decompression, medium voltage ( After used in pneumatic valve adjusting) , or automatic control of pressure, holding pressure, attached condenser can be used under the temperature of 350 ℃ or less.
enter the pneumatic valve after the control line to the actuator in particular of the film under the indoor function of force and reacting force of spring balance, determines the relative of the pneumatic valve, pneumatic valve seat position, pneumatic control valve after pressure. After the self-reliance type pneumatic pressure control valve pressure increases, the effect on the particular of force also will increase. In particular is greater than the power of the spring reaction, make the pneumatic valve core is close to the location of the pneumatic valve seat, until a particular reaction and the reaction force of spring balance. At this point, the pneumatic valve core and valve seat area to reduce the circulation, flow resistance, making the P2 down to a set value.