Principle One
The outlet pressure can be constantly changed between the pressure reducing valve’s maximum value and minimum value within the specified range of spring pressure levels without jamming or abnormal vibration;

Principle Two
There must be no leakage for soft-sealed pressure reduction valves within the allotted time; for metal-sealed pressure reducing valves, the leakage must not be greater than 0.5% of the maximum flow;

Principle three
The outlet pressure deviation of the direct-acting type is not more than 20%, and the pilot-operated type is not more than 10%, when the outlet flow rate changes;

Principle Four
The direct-acting type’s outlet pressure deviation when the inlet pressure changes is no greater than 10%, whereas the pilot-operated type’s deviation is no greater than 5%;

Principle five
The pressure behind the pressure reduction valve’s valve should typically be less than 0.5 times the pressure prior to the valve;

Principle six
The pressure reduction valve has a very broad variety of applications and can be used on steam, compressed air, industrial gas, water, oil, and many other liquid media equipment and pipelines. representation of the volume flow or flow;

Principle Seven
Low pressure, small, and medium diameter steam medium are suited for bellows direct acting pressure lowering valve;

Principle eight
Medium and low pressure, medium and small diameter air and water media are suited for thin-film direct-acting pressure reduction valves;

Principle Nine
The steam, air, and water media of varied pressures, diameters, and temperatures can all be used with the pilot piston pressure lowering valve. It can be used for a variety of corrosive media if it is built of stainless acid-resistant steel;

Principle ten
low pressure, medium and small diameter steam, air, and other media are ideal for a pilot bellows pressure decreasing valve;

Principle Eleven
low pressure, medium pressure, small and medium diameter steam or water, and other media-compatible pilot film pressure reduction valve;

Principle twelve
80% to 105% of the specified value of the intake pressure should be used to manage the pressure reduction valve’s inlet pressure fluctuation. The performance during the initial stages of decompression will be impacted if it exceeds this range;

Principle Thirteen
Typically, the pressure behind the pressure-reducing valve valve should be less than 0.5 times that which was present before the valve;

Principle Fourteen
The pressure lowering valve’s gear springs are only useful within a specific range of output pressure, and they should be replaced if the range is exceeded;
Principle 15
Pilot piston type pressure reduction valves or pilot bellows type pressure reducing valves are typically employed when the working temperature of the medium is quite high;

Principle 16
It is typically advised to use a direct-acting thin-film pressure reducing valve or a pilot-operated thin-film pressure reduction valve when the medium is air or water (liquid);

Principle 17
When steam is the medium, a pressure reduction valve of the pilot piston or pilot bellows type should be chosen;

Principle 18
The pressure reduction valve should normally be positioned on the horizontal pipeline for ease of use, adjustment, and maintenance.