使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinders. Use a check valve to prevent reverse flow into the cylinder.
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。
This positions the relief valve below the first check valve, enabling the zone to drain through the relief valve outlet.
要求：压差安全阀必须具有将两个止回阀之间的“区域”压力维持在比供应压力低至少2 PSI的功能。
Requirements: the pressure differential relief valve must operate to maintain the "zone" between the two check valves at least 2 PSI less than the supply pressure.
止回阀与安全阀在齿轮泵的输出管路上最好安装一个止回阀。
Check valve and relief valve on the output of the gear pump tube had better install a check valve.
对于锅炉厂的安全运行来说，截止止回阀和其它附加在锅炉上的安全阀或其它安全设施一样是必不可少的。
Valves are as essential to safe operation of a boiler plant as safety valves or other safety devices attached to the boiler.
该止回阀密封性能好，耐腐蚀，安全可靠，使用寿命长。
The check valve has good sealing property, is corrosion resistant, safe and reliable and has a long service life.
此外，在紧急回流或出现水锤现象时，如果第二止回阀受到污染，则这种安全阀可能出现释放（喷溅）。
Otherwise, such relief ( spitting) can occur when the second check is fouled during emergency backflow or resulting from a water hammer condition.
压差安全阀位于止回阀之间的区内。
A pressure differential relief valve is located in a zone between the check valves.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinder.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinder.
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