疊加式減壓閥 PRDM2PP16SVG15　一般說來，好像伺服系統(tǒng)都是閉環(huán)控制，比例多用于開環(huán)控制；其次比例閥類型要多，有比例壓力、流量控制閥等，號：D3W004CNJW42 連接形式：法蘭 品牌：Parker/派克
適用介質(zhì)：油品
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控制比伺服藥靈活一些。從他們內(nèi)部結(jié)構(gòu)看，伺服閥多是零遮蓋，比例閥則有一定的死區(qū)，控制精度要低，向應(yīng)要慢。但從發(fā)展趨勢看，特別在比例方向流量控制閥和伺服閥方面，兩者性能差別逐漸在縮小，另外比例閥的成本比伺服閥要低許多，抗污染能力也強(qiáng)！
伺服閥與比例閥的區(qū)別F12-040-RF-IV-K-000-000-0
F12-040-LF-IH-K-000-000-0(3799516)
F12-040-LF-IN-K-000-000-0(3781294)
F12-040-LF-IV-K-000-000-0(3783376)
F12-040-LS-SH-S-000-000-0(3799517)
F12-040-LS-SH-T-000-000-0(3799518)
F12-040-LS-TH-S-000-000-0(3780950)
F12-040-LS-TH-T-000-000-0(3782675)
F12-040-MF-CH-C-000-000-0(3799520)
F12-040-MF-CH-C-000-000-P(3782743)
F12-040-MF-CH-C-000-L01-0(3782446)
F12-040-MF-CH-C-244-000-0(3799545)
F12-040-MF-CH-C-248-000-0(3780206)
F12-040-MF-CH-C-248-000-S(3781978)
F12-040-MF-CH-C-294-000-0(3782387)
F12-040-MF-CH-C-294-000-S(3782313)
F12-040-MF-CH-X-264-000-0(3781029)
F12-040-MF-CH-X-300-000-0(3783054)
F12-040-MF-CV-C-000-000-0(3799521)
F12-040-MF-CV-X-264-L01-0(3783434)
F12-040-MF-IE-D-000-000-0(3799522)
F12-040-MF-IE-K-000-000-0(3799523)
F12-040-MF-IE-K-000-L01-0(3785583)
F12-040-MF-IH-D-000-000-0(3799525)
F12-040-MF-IH-D-000-000-S(3799966)
F12-040-MF-IH-D-000-L01-0(3799509)
F12-040-MF-IH-D-000-L01-S(3783011)
F12-040-MF-IH-D-000-L02-0(3781143)
F12-040-MF-IH-D-239-000-0(3799548)
F12-040-MF-IH-D-322-000-0(3785899)
F12-040-MF-IH-K-000-000-0(3799526)
F12-040-MF-IH-K-000-000-P(3785048)
F12-040-MF-IH-K-000-000-S(3780326)
F12-040-MF-IH-K-000-L01-0(3799510)
F12-040-MF-IH-K-000-L01-P(3783004)
F12-040-MF-IH-K-000-L01-S(3781290)
F12-040-MF-IH-Z-000-000-0(3799527)
F12-040-MF-IH-Z-000-L01-0(3782983)
F12-040-MF-IN-K-000-000-0(3799528)
F12-040-MF-IN-X-264-000-0(3781137)
F12-040-MF-IV-D-000-000-0(3799529)
F12-040-MF-IV-D-000-L01-0(3799511)
F12-040-MF-IV-K-000-000-0(3799530)
F12-040-MF-IV-K-000-L01-0(3782388)
F12-040-MF-IV-K-000-L01-P(3785758)
F12-040-MF-IV-Z-000-L07-0(3783330)

　　伺服閥與比例閥之間的差別并沒有嚴(yán)格的規(guī)定，因?yàn)楸壤y的性能越來越好，逐漸向伺服閥靠近，所以近些年出現(xiàn)了比例伺服閥。 
　　非要說差別，主要體現(xiàn)在一下幾點(diǎn)： 
　　1.伺服閥中位沒有死區(qū)，比例閥有中位死區(qū)； 
　　2.伺服閥的頻響（響應(yīng)頻率）更高，可以高達(dá)200Hz左右，比例閥一般*高幾十Hz； 
　　3.伺服閥對液壓油液的要求更高，需要精過濾才行，否則容易堵塞，比例閥要求低一些。 
　　比例伺服閥性能介于伺服閥和比例閥之間。 
　　比例換向閥屬于比例閥的一種，用來控制流量和流向。D1VW001CNGW PAVC1002R4222 D1FBB31FC0NJW0
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