往复泵的流量与压头无关，与泵缸尺寸、活塞冲程及往复次数有关。
Reciprocating pump flow and pressure head has nothing to do with the pump cylinder size, and the reciprocating frequency of the piston stroke.
该模式有利于提高泵的有效冲程及系统效率，降低能耗。
This pumping model is suitable for enhancing the effective stroke and efficiency of pumping system and reducing the consumption of energy.
采用固定冲程的柱塞泵，省去复杂的机械冲程调节装置，使柱塞直接推动膜片工作。
Adopting piston pump with fixed stroke, the piston directly propels the diaphragm, thus deleting the complex mechanic stroke adjustment equipment.
柱塞的长度总大于它的冲程，并只有柱塞的一个端面为液体增压。双作用柱塞泵至少需要两个缸体和柱塞。
A plunger is always longer than its stroke and only one end is available for pumping. Double-acting plunger pumps require at least two cylinders and plungers.
高容量轴流泵配备强大的635立方厘米2冲程双人整个转速范围内提供了巨大的推力。
A high-capacity axial-flow pump mated to the powerful 635 cm3 2-stroke Twin delivered tremendous thrust across the rev range.
该泵安装到曲轴箱的前面或后面，该泵是由发动机振动驱动。也可使用2冲程发动机。不推荐使用多缸发动机。
The pumps are actuated by engine vibration. May also be used for 2-cycle engines. Not recommended for opposed multi-cylinder engines.
因为滤渣器与泵塞是连轴一起移动的，在下冲程期间进入的液体可以起到冲刷作用，利用液体的冲刷来清理滤渣器，使砂粒悬浮于产出液中。
Because the filters move with the plunger, the sweeping action of the fluid on the downstroke cleans the filters and keeps sand suspended within the production fluid.
设计原理是减慢泵速、缩短冲程或改用小泵来降低排量，保持适当的沉没深度。
The design principle is to decrease the pump velocity, reduce stroke or to use a small pump to reduce the pump displacement and keep proper submersible depth.
设计原理是减慢泵速、缩短冲程或改用小泵来降低排量，保持适当的沉没深度。
The design principle is to decrease the pump velocity, reduce stroke or to use a small pump to reduce the pump displacement and keep proper submersible depth.
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