压缩空气向下推动活塞（6）和柱塞（10）。空气低于
活塞通过下气缸盖（9）、连接管（8）排气
阀门（2）和消音器（4）。压力球形止回阀（14）打开
虹吸球形止回阀（15）关闭。涂层材料位于
液压部分加压并从泵中压出。
当活塞到达行程底部时，换档机构（1）
将空气阀滑阀（3）移到阀的另一侧。吸入口
笔划再次开始。
死端和循环系统运行
在终端系统中，泵在施加气压时启动。信息技术
继续操作，直到系统中的液压等于
利用可用的空气压力，泵可以产生的压力。泵
然后暂停，直到液体压力下降，例如当喷枪
已触发。
在循环系统中，泵以
循环阀。打开阀门使泵运行更快；
关闭阀门会减慢泵的速度。正常工作速率为8到10
每分钟冲程数。
柱塞润滑
溶剂室包含润滑液（溶剂室液），其
润滑柱塞上部，防止上部填料
过度磨损。泵送的涂层材料润滑
下部填料。
注：通过上填料压盖泄漏的涂层材料将变色
溶剂室中的液体并使其液位升高。少量的
泄漏正常。如果溶剂杯快速填充并溢出填料
需要更换。应在以下位置更换上填料和下填料
同样的时间。
EI813F 3BDH000022R1 -1Pressure Stroke Compressed air forces down the piston (6) and plunger (10). Air below the piston exhausts through the lower cylinder head (9), connecting tube (8), air valve (2), and mufflers (4). The pressure ball check (14) opens and the siphon ball check (15) closes. The coating material in the lower part of the hydraulic section is pressurized and forced out of the pump. When the piston reaches the bottom of its stroke, the shifter mechanism (1) moves the air valve spool (3) to the opposite side of the valve. The suction stroke begins again. Dead-End and Circulating System Operation In a dead-end system, the pump starts when air pressure is applied. It continues to operate until the fluid pressure in the system equals the pressure the pump can produce with the available air pressure. The pump then stalls until the fluid pressure drops, such as when a spray gun is triggered. In a circulating system, the pump operates continuously at a rate set by a circulation valve. Opening the valve causes the pump to operate faster; closing the valve slows the pump. The normal operating rate is 8 to 10 strokes per minute. Plunger Lubrication The solvent chamber contains lubricating fluid (solvent chamber fluid), that lubricates the upper part of the plunger to prevent the upper packings from wearing excessively. The coating material being pumped lubricates the lower packings. NOTE: Coating material leaking past the upper packing gland will discolor the solvent chamber fluid and cause its level to rise. A small amount of leakage is normal. If the solvent cup fills quickly and overflows the packings need to be replaced. Both upper and lower packings should be replaced at the same time.
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