In the above, we have learned about the GJB150.5A-2009 military equipment laboratory environmental test method part 5: the purpose and specific application of the temperature shock test, and then we will continue to explain this issue. First, the limit (1) This test does not apply to: 1. Equipment that does not experience extreme extreme temperature changes due to reasons such as its packaging and installation location; 2. Equipment that will withstand air and liquid or transfer between two liquids to cause temperature shocks; 3. Equipment that will withstand the gas shock caused by the engine compressor or the rapid transient heating caused by pneumatic loading; 4. Equipment that is cooled by water after being heated by fire. (2) This test does not apply to equipment that does not produce significant temperature shocks during conversion in different environments (except for environmental stress screening). (3) This test cannot replace GJB150.3A-2009 and GJB150.4A-2009; performance evaluation of equipment after long-term exposure to extreme temperatures. Second, safety and environmental stress screening In addition to the above, this test is applicable to reveal safety issues and potential defects that are common to equipment exposure to sub-temperature changes (as long as the test conditions do not exceed the design limits of the equipment). Although this test is used as an environmental stress screening (ESS), it can also be used as a screening test (using a more extreme temperature temperature shock) after proper engineering to reveal that the equipment is exposed to sub-temperature changes. Potential defects that may arise. Industrial check valves are wildly used in all type of industrial pipelines, such as power stataion, petrochemical, natual gas,water treatment ect. Swing Check Valve, wafer check valve, titling disc check valve, piston check valve, disc checkvalve, lift check valve and API 602 Check Valve with ASME & DIN & EN & GOST standard are commonly used by customer. Industrial check valve we provided can cover size from 1/2 inch to 48 inch(DN15-DN1200) matching pressure from class 150 to class 2500(PN10-PN420) which are suitable for operating in the working media temperature from -196℃ to 693℃, as well as material in carbon steel, stainless steel, alloy steel and duplex steel in casting material or forging material. Check Valve,Piston Check Valve,Pvc Check Valve,Check Disc Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com