Vent the air gap and drain line from the relief valve in accordance with code requirements.
按照规程的要求，排出安全阀气隙和排放管道的空气。
Relief valve or vent valves permit a small pressure to be maintained on the vapor over the oil in the tank (except when the tank is being emptied).
卸压阀或通气阀使罐内油面上方的蒸汽保持微正压(油罐正在排空时除外)。
The Model 10bp USES a force balance principle to open the relief valve and vent the system pressure when the set point is exceeded.
示范10BP使用力量平衡的原则，以打开安全阀和通风系统压力设定点时超出。
The Model 10bp USES a force balance principle to open the relief valve and vent the system pressure when the set point is exceeded.
示范10BP使用力量平衡的原则，以打开安全阀和通风系统压力设定点时超出。
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