Relief valve easy to produce high-frequency noise, mainly due to unstable pilot valve performance, that is, the pilot valve pre-cavity pressure caused by high-frequency vibration air vibration noise. The main reasons are:
(1) Air is mixed with air and cavitation occurs in the pilot chamber leading to high frequency noise. At this point, the air should be drained in time to prevent the outside air from re-entering.
(2) When the needle valve is worn frequently due to frequent opening during use, the conical surface of the needle valve can not be in close contact with the valve seat, leading to instable pilot flow and pressure fluctuations resulting in noise. At this time, the valve should be repaired or replaced promptly.
(3) The pilot valve due to spring fatigue deformation caused by its unstable voltage regulating function, making the pressure fluctuations caused by noise, this time should be replaced by spring.
PPGI/PPGL(prepainted galvanized steel /prepainted galvalume steel )is also known as pre-coated steel,color coated steel, coil coated steel, color coated steel,pre pianted steel sheet,The PPGI steel coil/sheet made of cold-rolled steel sheet and galvanized steel sheet, subjected to surface pretreatment (degreasing, cleaning, chemical conversion treatment), coated in a continuous manner, and baked and cooled to form a product. Coated steel has light weight, beautiful appearance and good anti-corrosion performance, and can be directly processed.
Color Coated Steel Coil,Aluminized Zinc Steel Coil,Steel Coil For Roofing Sheet,Galvanized Steel Coil Roofing Sheet
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