1 pay attention to the direction of the arrow on the valve and the process requirements of the media flow direction, in order to avoid installation small air separation unit valves errors.
2 The pipeline connected with the valve should be thoroughly cleared of dirt, dust and other foreign mechanical impurities before installation. Prevent damage of the sealing surface of the valve.
3 The cold valve on the cold box of small air separation unit should be installed at the same time as the corresponding bracket, and the valve stem should be tilted at 15℃.
4 pipeline and body welding to close the valve first and use cooling measures, the body temperature in welding is not higher than 200 ℃, so as not to deform the valve seals, affecting the normal use of the valve.
5 switch valve installation, the shaft should be in a horizontal position, flange bolts should be evenly cross-tightened.
6 remote control valve after installation. Should strictly check whether the command signal and the valve actuator action is synchronized, whether the full open and full close position is correct, and record the opening degree command and the actual opening degree relationship of the valve.
7 after the installation of the valve opening and closing should be flexible, after the connection of the pipeline and the cold test process are to check the valve opening and closing state, there shall be no jamming phenomenon to be considered qualified. Where the cold angle valve with sleeve, low temperature pneumatic film adjustment valve, in the cold test process, need to use special tools to tighten the flange bolts.
