Marzocchi馬祖奇齒輪泵*
ALP1-D-2 ALP1-D-3 ALP1-D-4 ALP1-D-5 ALP1-D-6
ALP1-D-7 ALP1-D-9 ALP1-D-11 ALP1-D-13 ALP1-D-16
ALP1-D-20 ALP1A-D-2 ALP1A-D-3 ALP1A-D-4 ALP1A-D-5
ALP1A-D-6 ALP1A-D-7

Marzocchi馬祖奇齒輪泵*

卸荷溢流閥由溢流閥和單向閥組成。當(dāng)系統(tǒng)壓力達(dá)到溢流閥的開啟壓力時(shí)，溢流閥開啟，泵卸荷；當(dāng)系統(tǒng)壓力降至溢流閥的關(guān)閉壓力時(shí)，溢流閥關(guān)閉，泵向系統(tǒng)加載。使泵卸荷時(shí)的壓力稱為卸荷壓力，使泵處于加載狀態(tài)的壓力稱為加載壓力。它依靠壓縮彈簧把液壓系統(tǒng)中的過剩壓力能轉(zhuǎn)化為彈簧勢(shì)能存儲(chǔ)起來，需要時(shí)釋放出去。其結(jié)構(gòu)簡(jiǎn)單，成本較低。但是因?yàn)閺椈缮炜s量有限，而且彈簧的伸縮對(duì)壓力變化不敏感，消振功能差，所以只適合小容量、低壓系統(tǒng)（P≦1.0～1.2MPa），或者用作緩沖裝置。

它通過提升加載在密封活塞上的質(zhì)量塊把液壓系統(tǒng)中的壓力能轉(zhuǎn)化為重力勢(shì)能積蓄起來。其結(jié)構(gòu)簡(jiǎn)單、壓力穩(wěn)定。缺點(diǎn)是安裝局限性大，只能垂直安裝；不易密封；質(zhì)量塊慣性大，不靈敏。這類蓄能器僅供暫存能量用。

卸荷溢流閥的主要功能是自動(dòng)控制泵的卸荷或加載。鑒于卸荷溢流閥的功用，要求卸荷壓力與加載壓力之間存在一定差別。差值過小，則泵的卸荷與加載動(dòng)作過于頻繁；差值過大，則系統(tǒng)壓力變化太大。

Marzocchi馬祖奇齒輪泵*

ALP1-D-2  ALP1-D-3  ALP1-D-4  ALP1-D-5  ALP1-D-6
ALP1-D-7  ALP1-D-9  ALP1-D-11 ALP1-D-13 ALP1-D-16

ALP1-D-20 ALP1A-D-2 ALP1A-D-3 ALP1A-D-4 ALP1A-D-5
ALP1A-D-6 ALP1A-D-7 ALP1A-D-9

ALP1A-D-11 ALP1A-D-13 ALP1A-D-16 ALP1A-D-20 ALP1AQ-D-2
ALP1AQ-D-4 ALP1AQ-D-5 ALP1AQ-D-6 ALP1AQ-D-7 ALP1AQ-D-9

ALP1AQ -D-3 ALP1AQ-D-11 ALP1AQ-D-13 ALP1AQ-D-16
ALP1AQ-D-20 ALP1AQN-D-2 ALP1AQN-D-3 ALP1AQN-D-4

ALP1AQN-D-5  ALP1AQN-D-6  ALP1AQN-D-7  ALP1AQN-D-9
ALP1AQN-D-11 ALP1AQN-D-13 ALP1AQN-D-16 ALP1AQN-D-20

ALP2-D-10 ALP2-D-12 ALP2-D-13  ALP2-D-16  ALP1AF-S-4
ALP2-D-20 ALP2-D-22 ALP2-D-25  ALP2-D-30  ALP1AF-S-5

ALP2-D-34 ALP2-D-37 ALP2-D-40  ALP2-D-50  ALP1AF-S-9
ALP2A-D-6 ALP2A-D-9 ALP1AF-S-7 ALP1AF-S-6 ALP2-D-9

ALP2A-D-10 ALP2A-D-12 ALP2A-D-13 ALP2A-D-16 ALP2-D-6
ALP2A-D-20 ALP2A-D-22 ALP2A-D-25 ALP2A-D-30 ALP2A-D-34