A28H safety valves, safety valves, valve Everbright (View) Ltd provided by Shandong Everbright valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) is specialized in the "valve" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Ma. Body material: cast iron, steel, stainless steel, forged steel, chrome molybdenum steel, chrome molybdenum vanadium steel. Working pressure 1.6-32MPA (American Standard from 150LB-2500LB spring safety valve, the standard from 10K-64K). Operating temperature -20 ℃ -550 ° C valve diameter from DN15-DN300 connection: flange, silk mouth or welding. Drive: manual, electric, pneumatic, bevel gears, spur gears. Suitable medium: water, oil, gas, steam and so on. Breakdown and elimination method (1) does not return after the discharge valve seat. This is mainly a spring bent stem, the valve installation caused by malposition or jammed. Should be re-assembled. (2) less than the required pressure is on. The main constant pressure allowed; elastic spring aging decline. Tighten the screw should be properly adjust or replace the spring. (3) valve frequency hopping or vibration. Mainly due to the spring rate is too large. Should use appropriate spring stiffness; adjustment ring to adjust properly, so that the back seat pressure is too high. Should readjust the position of the adjustment ring; discharge piping resistance is too large, resulting in excessive emissions of backpressure. Discharge piping resistance should be reduced.