Workers in Shanghai to open the valve is a professional valve manufacturer, main products are gate valve, high pressure valve, ball valve, globe valve, engineers Jieyou decades of professional experience, introduced today is the choice for everyone vacuum valve 5 of the major factors to consider:
1. According to the material stainless steel, carbon steel, aluminum as the main material of the valve.
2. According to the work of a low pressure vacuum valves, ultra high vacuum valves and vacuum valves.
3. According to structural characteristics of a flapper valve, flapper valves, butterfly valves, ball valves, diaphragm valves, angle valves, through the valve, three-way valve.
4. According to the materials can be divided into dynamic seal metal seal and metal sealing valve. Rubber O-ring seal typically vacuum seals the drain was 10-4Pa.L / S, the axis of vacuum is not high, can be used for less demanding high vacuum conditions; metal bellows seal pipe sealing, the leakage rate of 10-7Pa.L / S, for ultra-high vacuum conditions.
5. According to a manual transmission principle, pneumatic, electric, electromagnetic. General pneumatic electromagnetic guide, the process of performing actions cylinder can also be manually controlled pilot valve cylinder process of the implementation of the action. Power for the hand, dual power, when power is available when manually operated.