Selection criteria for adjustable pressure reducing valve
1. Within the range of spring yellow pressure given, the outlet pressure can be continuously adjusted between the larger and the least pressure relief valve, and there should be no jamming or abnormal vibration;
2. For the soft-sealing pressure reducing valve, there should be no leakage within the required time; for the metal material sealing pressure reducing valve, the leakage cannot exceed 0.5 of the larger total flow;
3. When the total outlet flow changes, the immediate effect outlet pressure error value does not exceed 20, and the guiding type does not exceed 10;
4. When the channel pressure changes, the immediate effect outlet pressure error does not exceed 10, and the guiding type does not exceed 5;
5. The pressure of the rear valve of the superheated steam adjustable pressure reducing valve should be lower than 0.5 times of the pressure before the valve;
6. The use of pressure reducing valves is very common. It can be used for steam, compressed air, chemical gas, water, oil and many other liquid media machinery and equipment and pipelines. The amount of medium passing through the outlet of the pressure reducing valve is generally expressed by mass flow or total volume flow;
7. Metal bellows direct-acting pressure reducing valve is suitable for bottom pressure, medium and small diameter steam media;
8. Plastic film direct-acting Natural Gas Regulator is suitable for medium bottom pressure, medium caliber gas and water medium;
9. The pilot-operated pressure reducing valve is suitable for various pressures, various specifications and various temperatures of steam, gas and water media. If it is made of stainless steel, acid-resistant steel, it can be used in various corrosive media.
10. Pilot metal bellows pressure reducing valve is suitable for the bottom pressure, medium and small diameter steam, gas and other media; pneumatic shut-off valve
11. Pilot diaphragm pressure reducing valve is suitable for bottom pressure, high pressure, medium and small diameter steam or water medium;
12. The fluctuation of the channel pressure of the pressure reducing valve should be controlled at 80~105 of the input pressure of the channel pressure. If it exceeds, the characteristics of the pre-shrinking pressure will be compromised;
13. Generally, the pressure of the rear valve of the pressure reducing valve should be less than 0.5 times of the pressure before the valve;
14. Each yellow spring of the pressure reducing valve is only applicable to a certain range of outlet pressure, and the yellow spring should be replaced;
15. When the operating temperature of the medium is high, the pilot piston machine pressure reducing valve or the pilot metal bellows pressure reducing valve is generally used; emergency shut-off valve
16. When the medium is gas or water wet, it is generally selected to use immediate effect membrane pressure reducing valve or pilot diaphragm pressure reducing valve;
17. When the medium is steam, a pilot piston engine or pilot metal bellows pressure reducing valve should be used;
18. In order to facilitate the actual operation, adjustment and maintenance, the pressure reducing valve should generally be installed on the level pipe.
Post time: Dec-08-2021