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Product Q&A

Primary Pressure Regulating Valve

What is the difference between a primary pressure regulating valve and a differential pressure regulating valve?

"Primary pressure regulating valve" is installed as a relief valve for the pump in the air conditioning facilities for high-rise buildings adopting the open circuit method. "Differential pressure regulating valve" is installed in the facilities adopting the close circuit method, where a pump needs to run at the stable flow rate regardless of the back pressure. GD-20R primary pressure regulating valve and GD-21 differential pressure regulating valve are the major products in our product lineup.

Which size of mesh is recommended for the strainer applied to a primary pressure regulating valve to prevent foreign substances?

The size of 60 to 80mesh is recommended in the case that the controlled fluid is liquid or gas.

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