casing valve的意思|示意

The complex surface active agents with success applied in chemical cleaning of dowthem scales in heating casing of ball valve in PTA plant was presented.

采用复合表面活性剂对PTA装置球阀加热夹套热媒垢成功地进行了化学清洗。

The eccentric press handle (3) is riveted and connected to the valve casing (5) through a pin (4).

偏心压把（3）通过销子（4）铆接在阀壳（5）上。

The water heating control valve is composed of a valve casing, a valve outer cover, an inner cover, a pressure spring, a valve core, a positioning device and a sealing ring.

水暖控制阀由阀壳、阀外盖、内盖、压簧、阀芯、定位装置及密封圈构成。

According to this problem, casing oil stolen prevention sealing valve was developed, matching with down-hole oil-gas separator and gas lift valve lift technology.

针对这一难题，研制了套管防盗油密封阀，并配套应用了井下油气分离器与气举阀助流举升工艺技术。

The releasing one-way valve is used to release the pressure from the casing string and pick up the device properly.

释放单向阀用于释放管柱内的压力使装置顺利从套管中提出。

If the exhaust system is under a vacuum, the casing must be warmed by gradually introducing the steam, after opening the exhaust valve.

如果排气系统处于真空下，必须在打开排气阀后，逐渐引蒸汽来加热壳体。