理論上，泵的流量只取決于泵的主要結構參數 n（每分鐘往復次數）、S（活塞行程）、D（活塞直徑）、Z（活塞數目），與排出壓力無關，且與輸送介質的溫度、粘度等物理、化學性質無關。所以說泵的流量是恒定的。
3.泵的壓力取決于管道特性
柱塞泵的排出壓力不能由泵本身限定，而是取決于泵裝置的管道特性，并且與流量無關。也就是說，如果認為輸送液體是不可壓縮的，那么，在理論上可認為往復泵的排出壓力將不受任何限制，即可根據泵裝置的管道特性，建立泵的任何所需的排出壓力。當然，所有往復泵都有一個泵的排出壓力的規定，這不是說該泵的排出壓力不會再升高，而只是說，由于原動機額定功率和泵本身的結構強度的限制，不允許在超出這一排出壓力下使用而己。
4.對輸送介質有較強的適應性
柱塞泵原則上可以輸送任何介質，幾乎不受介質的物理性能和化學性能的限制。當然，由于液力端的材料和制造工藝以及密封技術的限制，有時也會遇到不能適應的情況。
5.有良好的自吸性能
柱塞泵不僅有良好的吸入性能，而且還有良好的自吸性能。因此，對多數往復泵來說，在啟動前通常不需灌泵。 機器效率高，節能。
6.高壓柱塞泵的流量
泵的理論流量：Qt=AsnZ
| 型號代碼 | zui大排量 cm3/r [ in3/rev] | 輸出流量 lpm [gpm] @ 額定轉速 rpm | 額定轉速 rpm | zui高壓力 bar [psi] | 基礎泵 重量 kg [lbs] | 通軸驅動泵 SAE A 重量 kg [lbs] |
| PVH 57QIC | 57,4 [3.5] | 98 [26] | 1800 | 250 [3625] | 30-36 [66-79] | 31-37 [68-82] |
| PVH 63QIC | 62,7 [3.84] | 106 [28] | 1800 | 230 [3300] | 30-36 [66-79] | 31-37 [68-82] |
| PVH 74QIC | 73,7 [4.50] | 125 [33] | 1800 | 250 [3625] | 39-45 [86-99] | 42-48 [93-106] |
| PVH 81QIC | 81,0 [4.5] | 135 [36] | 1800 | 230 [3300] | 39-45 [86-99] | 42-48 [93-106] |
| PVH 98QIC | 98,3 [6.0] | 170 [45] | 1800 | 250 [3625] | 43-49 [95-108] | 44-50 [97-110] |
| PVH 106QIC | 106,5 [6.5] | 183 [48] | 1800 | 230 [3300] | 43-49 [95-108] | 44-50 [97-110] |
| PVH 131QIC | 131,1 [8.0] | 223 [59] | 1500 | 250 [3625] | 60-66 [132-145] | 65-68 [137-150] |
| PVH 141QIC | 141,0 [8.64] | 236 [62] | 1500 | 230 [3300] | 60-66 [132-145] | 65-68 [137-150] |
| ? 在一個負荷感覺系統內補償者可以被規定 280 bar [4060 psi] | ||||||
PVH74QIC-RAF-13S-10-C25-31
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