Ama-switch pressure e-HW18 asetshenziselwa ukulawula umfutho wethangi phakathi kwamanani amabili asethiwe ngaphambilini ezigabeni ezi-3 zama-air compressor aqhutshwa ngogesi.

Amaswishi okucindezela e-HW19 asetshenziselwa ukulawula ukucindezela kwethangi phakathi kwamanani amabili asethiwe kusengaphambili kuma-compressor omoya aqhutshwa ngogesi. Atholakala nge-valve yokukhipha umthwalo, evimbela ama-compressor ukuthi aqale ngaphansi komthwalo futhi atholakala ne-Off-Off knob yokusika ngesandla i-compressor.

Amaswishi okucindezela kwe-HW20 asetshenziselwa ukulawula ukucindezela kwethangi phakathi kwamanani amabili asethiwe kusengaphambili kuma-compressor amancane aqhutshwa ngogesi. Ifakwe i-valve yokukhipha impahla, ingavimbela ama-compressor ukuthi aqale ngaphansi komthwalo. I-Theauto -off nqamula i-lever ukuze inqamule i-comressor ngesandla. Zombili izimbobo ezinesitayela esinezimbobo eziningi ziyatholakala ezinikeza ukukhweza kalula kwama-valve namageji.