Reciprocating pumpdischargepipe must be before the start of the valve to open.
往复泵启动前必须将排出管路中的阀门打开。
2
In order to prevent damage to the pump must pumpdischargepipe into the suction pipe installed between the safety valve.
为了防止泵的损坏，必须在泵的排出管到吸入管之间安装安全阀。
3
A by-pass capillary tube was added on the dischargepipe behind the four-way valve and a tube was added in an accumulator in a heat pump system to solve the problem.