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Brief introduction and role of Dongguan gas pressure regulating valve
The gas pressure regulating Valve is a lever-type differential pressure feedback control device used to regulate gas pressure. The gas stored in the cylinder is in liquid form and at high pressure, which needs to be reduced to a suitable level for use in stoves or other gas appliances.
**Brief Introduction and Role of Dongguan Gas Pressure Regulating Valve**
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**1) What is a Gas Pressure Regulating Valve?**
A gas pressure regulating valve is a type of lever-based control system that uses differential pressure feedback to manage gas pressure. Since the gas inside the cylinder is in liquid form and under high pressure, it must be regulated to a safe and usable level before being used in household or industrial appliances like stoves.
**2) Function of the Filter Pressure Regulating Valve**
The filter pressure regulating valve operates based on the principle of force balance. When the signal pressure applied to the bellows increases, it causes the lever to rotate around a fulcrum, bringing the baffle closer to the nozzle. This results in an increase in backpressure, which is then amplified and sent to the film actuator’s air chamber. As a result, the valve stem moves downward, driving the feedback rod (pendulum rod) to rotate around the fulcrum. The connected feedback cam (eccentric cam) also rotates counterclockwise, causing lever 1 to move via a roller. The feedback spring stretches, and as the force from the bellows balances with the spring force, the system reaches equilibrium. At this point, a specific signal pressure corresponds to a particular valve position.
This is known as a positive action. If the action mode needs to be changed, the cam can be reversed, switching the direction from A to B. A positive-acting positioner increases output pressure when the signal pressure increases, while a reverse-acting positioner decreases output pressure when the signal pressure increases. A positive-acting actuator can function as a reverse-acting one by installing a reverse positioner, and vice versa.
**Related Information (With Photos)**
Regulating valves typically consist of an electric or pneumatic actuator combined with a valve body. For linear motion, common types include single-seat and double-seat straight-through valves. Double-seat valves offer higher flow capacity, unbalanced operation, and stability, making them ideal for applications with large flow rates, high pressure drops, and low leakage. Angular stroke valves include V-type electric Ball Valves, electric butterfly valves, ventilation control valves, and eccentric butterfly valves.
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