1, use and scope of application
Self-operated pressure regulating valve (hereinafter referred to as pressure valve) is an energy-saving product that automatically adjusts the pressure without relying on the pressure change of the medium itself without external energy. It has comprehensive functions of measurement, execution and control. It is widely used in petroleum, chemical, metallurgy, light industry and other industrial sectors as well as urban heating and supply systems. This product can be used for pressure control devices for non-corrosive (up to 350 ° C) liquids, gases and vapors.
2, structure and working principle
The pre-valve pressure P1 of the process medium is changed to the post-valve pressure P2 after the throttle of the valve core and the valve seat. P2 is applied to the top plate of the actuator through the control line input actuator. The generated force is balanced with the reaction force of the spring. Determine the relative position of the valve core and valve seat. Control the pressure behind the valve. When the post-valve pressure P2 increases. The force of P2 acting on the top plate also increases. at this time. The force of the top plate is greater than the reaction force of the spring. Position the spool to the seat. Until the force of the top plate is balanced with the spring reaction force. At this time. The flow area between the valve plug and the valve seat is reduced. The flow resistance becomes larger. This reduces P2 to the set value. Similarly, when the post-valve pressure P2 decreases. The direction of action is opposite to the above. This is how the pressure is adjusted after the valve. When it is necessary to change the set value of the post-valve pressure P2. The adjustment nut 8 can be adjusted.
Technical features:
The self-operated pressure regulating valve is an actuator product that does not require any external energy and uses the energy of the medium to be adjusted to achieve automatic adjustment. The biggest feature of this product is that it can work in places without electricity and gas, and at the same time save energy. The pressure setting value can be adjusted at will during operation. It adopts fast opening flow characteristics, sensitive action and good sealing performance. Therefore, it is widely used in various industrial and industrial equipments such as petroleum, chemical, electric power, metallurgy, food, textile, machinery manufacturing and residential buildings. Steam medium decompression, pressure regulation (for post-valve adjustment), or automatic control of pressure relief, holding pressure (for pre-valve adjustment). A condenser can be used at temperatures up to ≤350 °C.
CNC Rebar Bending Machine, GF20CNC, GF25CNC Automatic Rebar Stirrup Bending Machine belongs to this type of machine.
This model control by foot pedal, and worker press the two foot pedal with 90 degree / 135 degree to control the bending angle.
1. Convenient use: perfect safety performance, standard angle, fast speed, light and
handy.
2. Easy Operation: one man can operate it once switch on the power.
3. Convenient of range adjustment: for GF20 model, just need to shift induced magnet.
for GF20 CNC and GF25CNC model, just need to press the button on operation panel
4. We adopt two foot pedals: 90°and 135°, angle adjustment freely.
5. Fast Speed: rotate speed is 20-25 times/min (GF20), 25-30 times/min(GF25).
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BAODING JINDI MACHINERY CO., LTD , http://www.rebarconnector.com