Boiler and pressure vessel safety valve operation inspection requirements 1, regular release of gas (gas) test records, and in accordance with the provisions of regular discharge (gas). 2, the normal operation of the boiler pressure vessel safety valve should be leak-free. 3, after the inspection of safety valve calibration records, setting values ​​in line with the requirements of the regulations. 4, safety valve exhaust pipe muffler exhaust holes no plug, water, water. 5, spring-loaded safety valve to prevent random twist device intact, lever-type safety valve limit device is complete, pulse safety valve pulse tube insulation intact, gas-type safety valve gas source to meet the requirements. 6, there is no safety valve relieve or arbitrarily raise the pressure of the phenomenon. Boiler and pressure vessel safety valve maintenance, maintenance requirements 1, found that safety valve selection error, timely replacement of the correct type of safety valve. 2, safety valve spool and seat sealing surface is not strict and can not be repaired, the safety valve should be replaced. 3, safety valve spool and valve stick or spring serious rust, corrosion should be replaced safety valve. 4, the safety valve body, valve, seat intact, no cracks on the surface, the sealing surface has been repaired by qualified acceptance. 5, stem, spool no jamming phenomenon. 6, spring-loaded safety valve spring deformation normal, no cracks; lever safety valve lever intact, no crack edge, heavy hammer limit device easy to adjust, fixed and secure; gas-box valve without jam. 7, safety valve exhaust pipe without overheating, internal corrosion has been cleaned up, support hanger force normal. 8, safety valve drain pipe clear, fixed in the right way. 9, check the safety valve pressure, back seat pressure, take-off height measurement, in line with technical documentation standards. 10, the boiler pressure vessel safety valve installation and maintenance, should check the pressure relief valve seat. Electromagnetic safety valve with electromagnetic return auxiliary operating mechanism, in addition to the mechanical or hydraulic device calibration, but also should do the remote operation of the electrical circuit test and automatic circuit pressure relay operation test. 11, boiler pressure vessel safety valve calibration, the pressure from the seat, back seat pressure, valve flap height should be consistent with the provisions of the boiler pressure vessel file records. 12, safety valve in the calibration process must have strict protection against overpressure protection measures, and under the supervision of the implementation. Safety valve calibration, the verifier shall not leave the scene halfway. - Feng Mao Valve Technology
301 Stainless Steel Cut Wire Shot
Longlived 301 Stainless Steel Shot is made from high quality 301 stainless steel wire by drawing, cutting and round. It has been widely used on surface treatment of springs, gears, screws, chains and many other dis casting parts for surface treatment of deburring, anti-corrosion, anti-fatigue and so on.
Its advantage is as below:
1. It is obtained by cutting the wire so that there is no hallowness one in bulk. It has a great durability and long service life. It's
2. The cutting process is fully completed by automatic machine so its particle fineness is extremely uniform.
3. Grinding process changes the surface of Stainless Steel Shot to make parts have a fine and smooth surface.
4. It has a great characteristics of moderate hardness, high strength and good toughness. When used in shot blasting machine, it will not be broken easily and could save much time and cost.
5. It will not rust even in a wet environment for a long time due to its material of stainless steel.
Using Longlioved 301 Stainless Steel Shot could make shot blasting faster, safer and cleaner. Welcome all of clients to connect with us to learn more.
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Longlived Metal Products Co ., Ltd , https://www.tzlonglivedmetal.com
