This positions the relief valve below the first check valve, enabling the zone to drain through the relief valve outlet.
在这种位置，安全阀位于第一止回阀下面，使得这个区能够通过安全阀出口排放。
2
A proper drain line connected to the valve outlet and run to a safe place of disposal must be installed.
必须安装一个适当的排泄管道，连接阀门的出水口，并且流向安全的地方。
3
Dual fireproof oil reservoirs should be designed, and the oil inlet height should not be lower than that of the water outlet to siphon oil in and drain water off.