Kusintha kwamphamvu kwa HW18 kumagwiritsidwa ntchito kuwongolera kuthamanga kwa thanki pakati pa zinthu ziwiri zokhazikitsidwa kale pa 3 gawo lamagetsi loyendetsedwa ndi ma compressor amagetsi. Amapezeka ndi valavu yotsitsa, yomwe imalepheretsa ma compressor kuti ayambe kunyamula, ndipo imapezeka ndi batani la On-Off kuti adulidwe pamanja.

Ma switch amphamvu aHW19 amagwiritsidwa ntchito kuwongolera kuthamanga kwa thanki pakati pa zinthu ziwiri zomwe zidakhazikitsidwa kale pama compressor amagetsi oyendetsedwa ndi magetsi. Amapezeka ndi valavu yotsitsa, yomwe imalepheretsa ma compressor kuti ayambe kudzaza katundu ndipo imapezeka ndi On-Off knob kuti adulidwe pamanja.

Ma switch amphamvu a HW20 amagwiritsidwa ntchito kuwongolera kuthamanga kwa thanki pakati pa zinthu ziwiri zokhazikitsidwa kale pamagetsi ang'onoang'ono oyendetsa magetsi. Okonzeka ndi valavu unloader, iwo angalepheretse kompresa kuyamba pansi load.Theauto -off chotsani cholumikizira kwa Buku kudula comressor. Mitundu yambiri ya madoko amodzi ndi anayi ilipo yomwe imathandizira kuyika ma valve ndi ma geji mosavuta.