Everbright valve model (Figure), A27H type spring inching valve, safety valve provided by Shandong China Everbright Limited 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. Such non-direct acting valve safety valve can be divided into pilot safety valve, safety valve driving force auxiliary device. Pilot valve is to rely on the media discharged from the pilot valve to drive or control. The pilot valve itself is a direct-acting valve, sometimes with other forms of valves. Pilot valve suitable for high pressure, large diameter occasions. The main valve pilot valve can also be designed to rely on the work of the media to seal the form, or can be applied much larger than the direct effect of mechanical load safety valve safety valve to valve, which has a good sealing performance. Meanwhile Shandong A27H safety valve, it moves very little affected backpressure. The disadvantage is that it is reliable safety valve with the main valve and pilot valve related action as a direct-acting valve as quickly, reliably, and more complex structure. Opening pressure adjustment: ① valve factory in Shandong A27H inching valve springs should be adjusted by one of its opening pressure to the setting value of user requirements. If the user make spring working pressure level, the lower limit should apply general level of the factory adjustment pressures. ② users before the safety valve is installed on the protected equipment or before the installation, you must re-adjusted at the installation site, in order to ensure the safety valve set pressure value to meet the requirements.