D101VW001C1VJWG美國PARKER比例換向閥PARKER比例換向閥
D101VHW003C4VYCF4563A D101VW001B1NYCF D101VW001B2NJCG D101VW001B4NYCF D101VW001C1NJPM3A
D101VW001C1NTP3A D101VW001C1NYCF D101VW001C1NYCFH3A D101VW001C1NYCF3A D101VW001C1VDCG
D101VW001C1VJWG D101VW001C1VKCM63F D101VW001C1VTCF D101VW001C1VYCF D101VW001C1VYCF563F
D101VW001C2NYCF56 D101VW001C2NYCF563A D101VW001C2NYC3A D101VW001C2NYW D101VW001C4NJPM3K
D101VW001C4NYC D101VW001C4NYCF D101VW001C4NYCFH3A D101VW001C4NYCF3A D101VW001C4NYCF5
D101VW001C4NYCF563A D101VW001C4NYCF6 D101VW001C4NYPF3G D101VW001C4NYPH D101VW001C4NYPH20
D101VW001C5NYCF D101VW001D1NYCF D101VW001D4NYCF D101VW001D4NYCF6 D101VW001H2NYCF D101VW001K2NYWF
D101VW002C3NYCF D101VW002C5NYCF3A D101VW002C5NYCF4 D101VW002C6NYCF D101VW002C6NYCF3A
D101VW003C1NYCF D101VW003C3NYCF D101VW003K1NJWG D101VW004B1NYCF D101VW004C1NYCF D101VW004C1NYCF3A

結構原理

輸入信號增大，供氣用電磁閥先導閥1換向，而排氣用電磁先導閥7處于復位狀態(tài)，則供氣壓力從SUP口通過閥1進入先導室5，先導室壓力上升，氣壓力作用在膜片2的上方，則和膜片2相連的供氣閥芯4便開啟，排氣閥芯3關閉，產(chǎn)生輸出壓力。此輸出壓力通過壓力傳感器6反饋至控制回路8。在這里，與目標值進行快速比較修正，知道輸出壓力與輸入信號成一定比例為止，從而得到輸出壓力與輸入信號的變化成比例的變化。由于沒有噴嘴擋板機構，故閥對雜質(zhì)不敏感，可靠性高。

特點

1)可實現(xiàn)壓力、速度的無極調(diào)節(jié)，避免了常通的開關式氣閥換向時的沖擊現(xiàn)象。

2)能實現(xiàn)遠程控制和程序控制。

3)與斷續(xù)控制相比，系統(tǒng)簡化，元件大大減少。

4)與液壓比例閥相比，體積小、重量輕、結構簡單、成本較低，但響應速度比液壓系統(tǒng)慢得多，對負載變化也比較敏感。

5)使用功率小、發(fā)熱少、噪聲低。

6)不會發(fā)生火災，不污染環(huán)境。受溫度變化的影響小。