How should pressure reducing valves be classified by structure?

2021-05-12 00:00

There are many types of pressure reducing valves. It is also important to use which pressure reducing valve on what occasion. The classification of the three steam pressure reducing valves is sorted out for everyone. How to classify them according to the structure?

1. The acting pressure reducing valve in the pressure reducing valve is a valve that is very simple to operate compared to other pressure reducing valves. It is a direct acting pressure reducing valve with a flat diaphragm or a bellows. Because it is a self-contained structure, there is no need to install external sensing lines downstream. It is the smallest and most economical of the three pressure reducing valves, designed for low to medium flow rates.

2. Piston type pressure reducing valve in pressure reducing valve: This type of pressure reducing valve integrates two kinds of valves - pilot valve and main valve. The design of the pilot valve is similar to that of a direct-acting pressure reducing valve. Exhaust pressure from the pilot valve acts on the piston, causing the piston to open the main valve.

This design uses inlet pressure to open the main valve if it is too large to open directly. Therefore, this type of Kunshan Lixinlong pressure reducing valve has a higher capacity under the same pipe size than the direct acting pressure reducing valve. Like the direct acting pressure reducing valve, the pressure reducing valve senses the pressure internally and does not require an external sensing wire.

3. Film type pressure reducing valve in pressure reducing valve: In this type of steam pressure reducing valve, the double diaphragm replaces the piston in the inner guide pressure reducing valve. This diaphragm area enables a larger main valve to open and, for the same pipe size, has a larger capacity than an internally piloted piston regulator. In addition, the diaphragm is more sensitive to pressure changes with an accuracy of +/- 1%. The higher accuracy is due to the positioning of the downstream sensing line where there is less gas or liquid turbulence.

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