1. All valves should be inspected after unpacking, including complete nameplates on the valve body, product quality certification documents, valves in a closed state, no damage to the flange surface, no dirt, and protective covers at both ends, etc. 2. Operators should be familiar with the operation of the pressure test bench. 3. The valve pressure test JHA is perfect, and the operators should be familiar with the safety hazards in the process of valve pressure test and reverse operation, and have corresponding preventive measures. 4. The valve pressure test process is: valve shell strength test, upper seal test, and seal test. (1) The valve shell strength test medium is water, the pressure is 1.5 times the nominal pressure of the valve, and the pressure holding time is 5 minutes. If there is no drip or humidity, it is qualified. (2) Water is used as the sealing test medium on the valve, and the pressure is 1.5 times the nominal pressure. The pressure holding time is 15s for DN≤50, 60s for 65≤DN≤300, and 120s for DN≥350. No leakage is qualified. (3) Valve sealing test Carry out a low-pressure sealing test, the test medium is air (gate valve), the pressure is 0.6MPa, the pressure holding time is 15s for DN≤50, 60s for 65≤DN≤150, 120s for DN≧200, and the penetration amount meets Requirements are qualified. (4) After passing the pressure test, the water in the valve cavity should be dried up with compressed air in time. (5) The valves that pass the pressure test are marked √ on the valve body, and the unqualified valves are marked.
(6) After the pressure test, the valves should be stacked separately according to the model and specification of the device, and the unqualified products should be stacked separately; each stacking area should have an obvious signboard. After the pressure test, the valve should be covered and covered with colored strips of cloth in the storage area. (7) After the pressure test of the valve, the "Valve/Pipe Fitting Test Record" should be filled in time according to the device, and the purchase contract number on the valve body should be filled in the model column. (8) For the release of valves that pass the test, the "Valve Release Record" of the valve must be filled in, and signed by both the release and the receiver. (9) Unqualified valves need to establish a separate "Unqualified Valve Information Ledger"
Jiangmen Guolong Precision Valve Co.,Ltd had professional management and production team who has over 10 years of working experience in the gas appliance and product development capability.The scope of production covers various kinds of Oven Gas Valve.Gas Stove Valve.home furnace gas valve.Stove Burner and Stove Burner.For more information, please contact us:
Tel :+86-0750-3772216
Mobile Phone :+8613612273195
Email :salesteam@glstovevalve.com
