The lowpressureheader shall be brass and shall be near the panel floor with drain valves and tundishes piped to a drain.
低压力头应黄铜,并应靠近排水阀和中间包输送到一个排水板地板。
2
The lowpressureheader and each branch shall have a 6 mm minimum, non ferrous shut off valve for each instrument requiring an air supply and a compression coupling for each air purge connection.