Safety valves are widely used in various industries of the national economy, as boilers and pressure vessels and piping safety accessories, in accordance with the national "Pressure Vessel Safety Technology Supervision" requirement, "safety valve should check at least once a year in general." However, the current petrochemical, chemical and other enterprises means more than one year of continuous operation, even two or three years to achieve parity once a year is difficult; some devices are continuous operation, no maintenance period; in addition, is running on the device The safety valve failure need not stop to remove and replace it difficult to achieve. To do this with a handle spring safety valve, developed a safety valve A28H fast switching device with a handle spring safety valve, you can achieve the purpose of stopping the machine to quickly replace the safety valve. According to the State Bureau of Quality Supervision Boiler and Pressure Vessel Inspection and Supervision Bureau issued "steam boiler safety technology supervision order states:" The boiler safety valve at least once a year should check ";" Electric Power Industry Boiler and Pressure monitoring procedures "container ((DL612-1996 ) 9.1.13) states: "After the boiler safety valve installation and overhaul is completed and reconditioned should check the pressure relief valve from the seat," (and clearly states that "procedures to monitor the range: f) the thermodynamic system pressure vessel: high, low pressure heaters, deaerator, and other various types of expansion "; State Power Corporation issued" to prevent major accidents electricity production of 25 key requirements, "states:" all kinds of pressure vessel safety valve should regularly check and emissions test. " These provisions are very clear on power plant safety valve regular checks. This type valve in the pipe should generally be installed horizontally. 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, Japanese 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. Safety valve, safety valve, the valve model with handle spring Everbright Ltd. Shandong Everbright provided by the valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) is a specialist in the "valve" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Everbright" brand has a good reputation. We adhere to the "service first, customers first" principle, so that the valve Everbright won the trust of customers in the congregation ball, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you!