The valve has been widely used in various industries, suitable for water and gas pipes and equipment. Butterfly valve manufacturer by the next we explain a variety of different kinds of simple working principle of the pressure reducing valve.

1。 Working principle of the direct acting pressure reducing valve

exports increased lateral pressure, membrane move up, valve opening decreases, and traffic increase, the pressure drop increases, the valve after pressure drop; Move down the export side pressure drop, membrane, Industrial Valves opening increases, the flow rate decreases, and lower pressure. Behind the droplets decreases, the valve pressure increases. At the back of the valve outlet pressure always maintain a constant by adjusting screw configuration.

2。 Straight moving type bellows type pressure reducing valve working principle

export side pressure increases, corrugated pipe moving up, valve opening decreases, and flow rate increases, the pressure drop increases, pressure behind the valve; Export the lateral pressure is reduced, the corrugated pipe moves down, the valve opening increases, the flow decreases. pressure drop is reduced, the back pressure increases. At the back of the valve outlet pressure always maintain a constant by adjusting screw configuration.

3。 The guide piston type pressure reducing valve working principle

tighten the adjustment screw, open the pilot valve cover, medium from the side entrance into the piston. Plug area is greater than the area of the main valve cover, push the piston down to the main valve opens, the balance after spring pressure regulation valve pilot valve opening, so as to change the piston at the top of the pressure and control the opening of the main valve disc. Stay behind the valve pressure constant.

4。 Pilot diaphragm type pressure reducing Industrial Valves working principle

operation principle of the No. 3. The piston by the thin film is slow, membrane intraluminal pressure controlled by the bypass valve.

5。 The forerunner diaphragm type pressure reducing valve working principle

when adjusting spring in a free state, the main valve and pilot valve are closed. When the handwheel clockwise, pilot valve diaphragm downward, pilot valve is opened, the medium through the pilot valve to the top of the diaphragm, the main valve is pushed, the main valve opens, media of exports, cylinder into the pilot valve at the bottom of the diaphragm. Outlet pressure rise to adjust the spring force balance. If the outlet pressure decrease, the forerunner diaphragm upward motion and the guide openings. At the same time, into the main diaphragm medium flow rate, pressure is reduced, the opening of the main valve is reduced, the outlet pressure is reduced, reaching a new equilibrium, and vice versa.

6, the working principle of combination of pressure reducing valve

pressure reducing valve by the main valve and pilot valve and globe valve. When adjusting spring in a free state, the main valve and pilot valve is closed. Turn adjusting screw, medium to promote pilot valve and into the chamber 1 and adjust the spring pressure balance, hand in hand in the valve cavity 2 rubber film. The flow direction of medium rubber diaphragm upward, the main valve opens, exports. Globe valve open to keep 2 mobile pressure chamber. Export medium was sent back to the rubber film chamber 3 and pilot valve at the bottom of the chamber 4. When the discharge pressure increases, the pilot valve diaphragm moving up, the pilot valve opening is reduced, and medium voltage lower chamber 1. Chamber pressure drop of 2, the main valve moves down the rubber membrane, the main valve opening is reduced, the outlet pressure drops, and reached a new equilibrium, and perception is the same.

7, the working principle of lever type pressure reducing valve

this is a pressure reducing valve, pressure by the weight of the lever balance. Operating principle: when the lever is in a state of freedom, the valve plate and double seat seat closed. Under the effect of inlet pressure, push up the disc, outlet pressure. Weight on the lever balance weight, will adjust to the desired outlet pressure. When the outlet pressure over a given pressure, due to the medium pressure under the action of forces acting on the seat of the force on the seat is very big, the formation of a certain pressure difference, namely the disc moves down, in order to reduce the area of throttling, outlet pressure is decreased, reaching a new equilibrium ( And vice versa) 。

8。 Guiding type bellows type pressure reducing valve working principle

turn adjusting screw, open the pilot valve tray, medium from the side entrance into the piston. Due to the piston area is greater than the area of the disc, piston is driven down to make the main valve opens, and spring balance adjust the spring pressure change. To change the piston at the top of the valve open pressure, control of the main valve disc to open, to keep the valve at the back of the constant pressure.

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