在吸气冲程，空气阀将压缩空气通过
连接管（8）和下气缸盖（9），以向上推动空气马达
活塞和柱塞。活塞上方的空气通过上部
气缸盖（5）、空气阀和消音器（4）。
压力球形止回阀（14）关闭，虹吸球形止回阀（15）打开。
液压部分上部的涂层材料加压
然后从泵里挤出来。新的或再循环的涂层材料
虹吸到液压部分的下部。
当活塞和柱塞到达行程顶部时，换档杆
机构（1）将空气阀滑阀（3）移动到
阀门供气流被重新引导至活塞顶部，以开始
压力冲程。
ECPSR086370-001 -2Suction Stroke On the suction stroke, the air valve routes compressed air through the connecting tube (8) and lower cylinder head (9) to push up the air motor piston and plunger. Air above the piston exhausts through the upper cylinder head (5), air valve, and mufflers (4). The pressure ball check (14) closes and the siphon ball check (15) opens. The coating material in the upper part of the hydraulic section is pressurized and forced out of the pump. New or recirculated coating material is siphoned into the lower part of the hydraulic section. When the piston and plunger reach the top of the stroke, the shifter mechanism (1) moves the air valve spool (3) to the opposite side of the valve. The flow of supply air is rerouted to the top of the piston to begin the pressure stroke.
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