测量阀孔和阀芯的配合间隙，阀孔直径为50 ？
Measuring valve spool with holes and gaps, valve hole diameter is 50?
油温升高使阀心受热膨胀，阀套与阀心间的配合间隙减小， 阀心有可能被卡死在阀套里。
The fit clearance between spool and sleeve decreases because of the thermal expansion of the spool caused by temperature increment, so it is possible that spool is deadlocked in sleeve.
吹灰器的阀门内装有调整盘，改变调整盘与阀阀座环的间隙，可以改变吹灰介质的工作压力。请在吹灰之前现场调节。
There is adjusting disc in the valve. Change the distance between disc and seat ring can change the blowing pressure.
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