The robust urethane seat portion of the one-piece liner covers the interior of the valve.
一件式衬垫的结实耐用的氨基甲酸乙酯阀座部分也覆盖了阀门内部表面。
2
Test shows that the service life of the drill pump valve and liner after carburizing and vanadiumizing are greatly extended.
试验表明,钻井泵泵阀和缸套经增碳-钒化处理后其使用寿命显著延长。
3
The flow control valve is mainly made up of housing, body, sealing shim, liner bushing, valve cartridge, bearing, breather layer, aerator tank and transmission device etc.