The low pressure header 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。
The low pressure header 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.
低压头和每个分支应为6毫米，非铁关断阀在每个送风和空气净化压缩为每个连接耦合仪器最低要求。
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