力士樂平衡閥FD32KA21/B06V，上海韋米機電設備有限公司主營產品之一，銷售熱線： ；聯系人：雷青；業務QQ：---；手機微信： ； ；傳真 ；原廠直銷，質量保障，現貨庫存，價格優惠！

恒流量調節閥是以補償方式時行變阻力的動作，它有倆個閥瓣，一個是調節閥瓣，用于補償節流孔前后的差壓，因此可成為“補償式變阻力調節閥”其原理是：利用節流孔前后的差壓，作為補償動作的驅動力，補償并保持節流孔前后差壓的穩定，從而保持流量的恒定，調節節流孔的大小就可獲得不同的流量。因此，它既可以調節流量。也可以在系統水利工況變化時保持流量恒定，在系統中它既可恒定各個支路的流量，實現流量的均衡輸配，也可以隨時改變和調節各支路的流量，實現動態平衡。如果每年在初寒到嚴寒和嚴寒到末寒是進行倆次流量調節，即可實現“分階段改變流量的質調節”的節能運行方式。恒流量調節閥的調節簡單方便，但對于較大的系統來說，每年進行倆次調節仍然是個負擔，而且恒流量調節閥的價格高，雖然當年可以收回，但對用戶仍有較大的心理壓力。

 

流量閥是由一個手動調節閥組和一個自動平衡閥組組成。調節閥組作用是設定流量，自動平衡閥組作用是維持流量恒定。系統流體的工作壓力為P1，手動調節閥的前后壓力分別為P2、P3。當手動調節閥調到某一位置時，即人為確定了“設定流量”Kv即手動調節閥的流量系數，流量G=Kv（P2-P3），Kv為，Kv設定后，只要P2－P3不變，則流量G不變。當系統流量增大時，(P2—P3)的實際值超過了允許的給定值，此時通過感壓膜和彈簧作用使自動調節閥組自動關小，直至流量重新維持到設定流量，反之亦然。
流量閥自動調節流量的有效范圍取決于工作彈簧的性能。一般流量閥前后壓差在20—300kPa的范圍內能按設定值有效控制流量。當壓小于20kPa時，控制流量達不到設定值；壓差超過300kPa時，可能產生噪音。
力士樂平衡閥FD32KA21/B06V
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力士樂平衡閥FD32KA21/B06V

按用途分為五種：
(1)節流閥：在調定節流口面積后，能使載荷壓力變化不大和運動均勻性要求不高的執行元件的運動速度基本上保持穩定。節流閥是通過改變節流截面或節流長度以控制流體流量的閥門。將節流閥和單向閥并聯則可組合成單向節流閥。節流閥和單向節流閥是簡易的流量控制閥，在定量泵液壓系統中，節流閥和溢流閥配合，可組成三種節流調速系統，即進油路節流調速系統、回油路節流調速系統和旁路節流調速系統。節流閥沒有流量負反饋功能，不能補償由負載變化所造成的速度不穩定，一般僅用于負載變化不大或對速度穩定性要求不高的場合。 
　　(2)調速閥：調速閥是進行了壓力補償的節流閥。它由定差減壓閥和節流閥串聯而成。節流閥前、后的壓力分別引到減壓閥閥芯右、左兩端，當負載壓力增大，于是作用在減壓閥芯左端的液壓力增大，閥芯右移，減壓口加大，壓降減小，使也增大，從而使節流閥的壓差保持不變；反之亦然。這樣就使調速閥的流量恒定不變。在載荷壓力變化時能保持節流閥的進出口壓差為定值。這樣，在節流口面積調定以后，不論載荷壓力如何變化，調速閥都能保持通過節流閥的流量不變，從而使執行元件的運動速度穩定。
力士樂平衡閥FD32KA21/B06V
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力士樂平衡閥FD32KA21/B06V