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我厂四台5L-40/8型空压机,自七○年先后安装运转使用,我们发现一些不足之处: ①一、二级气缸吸气阀叉子小活塞密封性能较差; ②气阀盖在往气缸上安装时易掉爪。 为此,我们在上述两处做了小改动: a.将2＃空压机原来一、二级气缸吸气阀叉子小活塞上的一道密封圈,改为两道密封圈。后车的一道密封圈的槽比原来那边密封圈的糟略浅一些,使已磨损的密封圈放置其中再利用（见图1）。经一段时间试验运转正常,
I plant four 5L-40/8 air compressor, has been installed since 70 years of operation, we found some deficiencies: ①, two cylinder suction valve fork small piston sealing performance is poor; ② valve Cover easy to claw when installed on the cylinder. To this end, we made a small change in the two places: a. The original 2 # air compressor cylinder valve suction valve on a small piston on a seal, to two seals. The groove of a sealing ring in the rear of the vehicle is slightly shallower than the sealing ring on the original side, so that the worn sealing ring is placed and reused (see FIG. 1). After a period of normal operation of the test,