Rexroth先導(dǎo)式三位四通伺服向閥的特征：先導(dǎo)式 4/3-伺服向閥 NG10 ～ NG35，遮蓋度約為 20 ％； 先導(dǎo)閥 NG6，配有控制閥芯和閥套，伺服性能可靠，但電磁鐵驅(qū)動操作，4位4通，斷電時于 Fail-safe 功能位置；控制電磁鐵配有電子位置反饋器和位移傳感器的電子控制器 （Lvdt DC/DC）；主級配有位置反饋器；線性行程滑閥，配有防扭轉(zhuǎn)裝置；流量特性：S = 曲線漸增式，NG16, 25, 27，帶有負(fù)載分接頭 C1/C2 ；用于閥板安裝, NG10 接口的位置符合ISO 4401-05-05-0-05, NC16 接口的位置符合 ISO 4401-07-07-0-05，NG25/27 接口的位置符合ISO 4401-08-08-0-05，NG35 接口的位置符合 ISO 4401-10-09-0-05 ；安裝板根據(jù)規(guī)格參數(shù)表，NG10 RC 45055, NG16 RC 45057, NG25/27 RC 45059 和 NG35 RD 45060（單獨(dú)訂購）；插頭式連接器符合 DIN 43560-AM2，電磁鐵 2P+PE/ M16x1.5，位移傳感器 4P/Pg7 含在供貨范圍內(nèi)；外接電子控制器（單獨(dú)訂購），電子放大器，用于標(biāo)準(zhǔn)特性曲線，沒有斜坡，電子放大器，有斜坡和死區(qū)補(bǔ)償

     Rexroth配有電子位置反饋器的先導(dǎo)式三位四通伺服向閥由 2 個主要部件構(gòu)成：先導(dǎo)閥（1），配有控制控制閥芯和閥套、回位彈簧、控制電磁鐵和感應(yīng)式位移傳感器；主級（2），配有對中彈簧和位置反饋器

     功能說明：當(dāng)沒有操動控制電磁鐵時，先導(dǎo)閥的控制滑閥在彈簧力作用下在“Fail-Safe”功能位置中，主級滑閥在其彈簧對中的中間位置。在集成電子控制器中將設(shè)定值與主級控制滑閥的位置實(shí)際值進(jìn)行比較。 如果存在控制偏差，就會驅(qū)動控制電磁鐵，以改變磁力的方式對先導(dǎo)滑閥進(jìn)行調(diào)整。 經(jīng)過控制截面的體積流量使得主控制滑閥移動。 如果將設(shè)定值設(shè)置為 0 V，則主級的控制滑閥就會在對中彈簧作用下保持在被遮蓋的中間位置。要么在內(nèi)部通過接口 P，或者在外部通過接口 X 將控制油供應(yīng)給先導(dǎo)閥。 可以在內(nèi)部通過接口 T 或者在外部通過接口 Y 回流到油箱。
電源故障：如果發(fā)生故障，或者當(dāng)電纜斷線時，集成式電子控制器就會將控制電磁鐵斷電，先導(dǎo)滑閥進(jìn)入“Fail-Safe”功能位置，并且將主級的控制油腔卸空。 主級控制滑閥在彈簧作用下進(jìn)入中間位置。

Rexroth力士樂先導(dǎo)式三位四通伺服向閥的部分常用型：

4WRL10E80S-3X/G24Z4/M 4WRL10E80S-3X/G24EZ4/M 4WRL10E80S-3X/G24ETZ4/M
4WRL10E80S-3X/G24ZT4/M 4WRL10E180S-3X/G24Z4/M 4WRL10E180S-3X/G24EZ4/M
4WRL10E180S-3X/G24ETZ4/M 4WRL10E180S-3X/G24ZT4/M 4WRL10W80S-3X/G24Z4/M
4WRL10W80S-3X/G24EZ4/M 4WRL10W80S-3X/G24ETZ4/M 4WRL10W80S-3X/G24ZT4/M
4WRL10W180S-3X/G24Z4/M 4WRL10W180S-3X/G24EZ4/M 4WRL10W180S-3X/G24ETZ4/M
4WRL10W180S-3X/G24ZT4/M 4WRL10E480S-3X/G24Z4/M 4WRL10E480S-3X/G24EZ4/M
4WRL10E480S-3X/G24ETZ4/M 4WRL10E480S-3X/G24ZT4/M 4WRL10W480S-3X/G24Z4/M
4WRL10W480S-3X/G24EZ4/M 4WRL10W480S-3X/G24ETZ4/M 4WRL10W480S-3X/G24ZT4/M         力士樂4WRL型伺服向閥

4WRL16E110S-3X/G24Z4/M 4WRL16E110S-3X/G24EZ4/M 4WRL16E110S-3X/G24ETZ4/M
4WRL16E110S-3X/G24ZT4/M 4WRL16E1110S-3X/G24Z4/M 4WRL16E1110S-3X/G24EZ4/M
4WRL16E1110S-3X/G24ETZ4/M 4WRL16E1110S-3X/G24ZT4/M 4WRL16W110S-3X/G24Z4/M
4WRL16W110S-3X/G24EZ4/M 4WRL16W110S-3X/G24ETZ4/M 4WRL16W110S-3X/G24ZT4/M
4WRL16W1110S-3X/G24Z4/M 4WRL16W1110S-3X/G24EZ4/M 4WRL16W1110S-3X/G24ETZ4/M
4WRL16W1110S-3X/G24ZT4/M 4WRL16E4110S-3X/G24Z4/M 4WRL16E4110S-3X/G24EZ4/M
4WRL16E4110S-3X/G24ETZ4/M 4WRL16E4110S-3X/G24ZT4/M 4WRL16W4110S-3X/G24Z4/M
4WRL16W4110S-3X/G24EZ4/M 4WRL16W4110S-3X/G24ETZ4/M 4WRL16W4110S-3X/G24ZT4/M
4WRL16E180S-3X/G24Z4/M 4WRL16E180S-3X/G24EZ4/M 4WRL16E180S-3X/G24ETZ4/M
4WRL16E180S-3X/G24ZT4/M 4WRL16E1180S-3X/G24Z4/M 4WRL16E1180S-3X/G24EZ4/M
4WRL16E1180S-3X/G24ETZ4/M 4WRL16E1180S-3X/G24ZT4/M 4WRL16W180S-3X/G24Z4/M
4WRL16W180S-3X/G24EZ4/M 4WRL16W180S-3X/G24ETZ4/M 4WRL16W180S-3X/G24ZT4/M
4WRL16W1180S-3X/G24Z4/M 4WRL16W1180S-3X/G24EZ4/M 4WRL16W1180S-3X/G24ETZ4/M
4WRL16W1180S-3X/G24ZT4/M 4WRL16E4180S-3X/G24Z4/M 4WRL16E4180S-3X/G24EZ4/M
4WRL16E4180S-3X/G24ETZ4/M 4WRL16E4180S-3X/G24ZT4/M 4WRL16W4180S-3X/G24Z4/M
4WRL16W4180S-3X/G24EZ4/M 4WRL16W4180S-3X/G24ETZ4/M 4WRL16W4180S-3X/G24ZT4/M      力士樂4WRL型伺服向閥

4WRL25E350S-3X/G24Z4/M 4WRL25E350S-3X/G24EZ4/M 4WRL25E350S-3X/G24ETZ4/M
4WRL25E350S-3X/G24ZT4/M 4WRL25E1350S-3X/G24Z4/M 4WRL25E1350S-3X/G24EZ4/M
4WRL25E1350S-3X/G24ETZ4/M 4WRL25E1350S-3X/G24ZT4/M 4WRL25W350S-3X/G24Z4/M
4WRL25W350S-3X/G24EZ4/M 4WRL25W350S-3X/G24ETZ4/M 4WRL25W350S-3X/G24ZT4/M
4WRL25W1350S-3X/G24Z4/M 4WRL25W1350S-3X/G24EZ4/M 4WRL25W1350S-3X/G24ETZ4/M
4WRL25W1350S-3X/G24ZT4/M 4WRL25E4350S-3X/G24Z4/M 4WRL25E4350S-3X/G24EZ4/M
4WRL25E4350S-3X/G24ETZ4/M 4WRL25E4350S-3X/G24ZT4/M 4WRL25W4350S-3X/G24Z4/M
4WRL25W4350S-3X/G24EZ4/M 4WRL25W4350S-3X/G24ETZ4/M 4WRL25W4350S-3X/G24ZT4/M
4WRL27E430S-3X/G24Z4/M 4WRL27E430S-3X/G24EZ4/M 4WRL27E430S-3X/G24ETZ4/M
4WRL27E430S-3X/G24ZT4/M 4WRL27E1430S-3X/G24Z4/M 4WRL27E1430S-3X/G24EZ4/M
4WRL27E1430S-3X/G24ETZ4/M 4WRL27E1430S-3X/G24ZT4/M 4WRL27W430S-3X/G24Z4/M
4WRL27W430S-3X/G24EZ4/M 4WRL27W430S-3X/G24ETZ4/M 4WRL27W430S-3X/G24ZT4/M
4WRL27W1430S-3X/G24Z4/M 4WRL27W1430S-3X/G24EZ4/M 4WRL27W1430S-3X/G24ETZ4/M
4WRL27W1430S-3X/G24ZT4/M 4WRL27E4430S-3X/G24Z4/M 4WRL27E4430S-3X/G24EZ4/M
4WRL27E4430S-3X/G24ETZ4/M 4WRL27E4430S-3X/G24ZT4/M 4WRL27W4430S-3X/G24Z4/M
4WRL27W4430S-3X/G24EZ4/M 4WRL27W4430S-3X/G24ETZ4/M 4WRL27W4430S-3X/G24ZT4/M
4WRL35E1100S-3X/G24Z4/M 4WRL35E1100S-3X/G24EZ4/M 4WRL35E1100S-3X/G24ETZ4/M
4WRL35E1100S-3X/G24ZT4/M 4WRL35E11100S-3X/G24Z4/M 4WRL35E11100S-3X/G24EZ4/M
4WRL35E11100S-3X/G24ETZ4/M 4WRL35E11100S-3X/G24ZT4/M 4WRL35W1100S-3X/G24Z4/M
4WRL35W1100S-3X/G24EZ4/M 4WRL35W1100S-3X/G24ETZ4/M 4WRL35W1100S-3X/G24ZT4/M
4WRL35W11100S-3X/G24Z4/M 4WRL35W11100S-3X/G24EZ4/M 4WRL35W11100S-3X/G24ETZ4/M
4WRL35W11100S-3X/G24ZT4/M 4WRL35E41100S-3X/G24Z4/M 4WRL35E41100S-3X/G24EZ4/M
4WRL35E41100S-3X/G24ETZ4/M 4WRL35E41100S-3X/G24ZT4/M 4WRL35W41100S-3X/G24Z4/M
4WRL35W41100S-3X/G24EZ4/M 4WRL35W41100S-3X/G24ETZ4/M 4WRL35W41100S-3X/G24ZT4/M

Rexroth力士樂先導(dǎo)式三位四通伺服向閥的附件，不在供貨范圍內(nèi)
緊固螺絲 NG10 4 x ISO 4762-M6 x 40-10.9-N67F821 70 2 910 151 209
NG16 2 x ISO 4762-M6 x 45-10.9-N67F821 70 2 910 151 211
4 x ISO 4762-M10 x 50-10.9-N67F821 70 2 910 151 301
NG25/27 6 x ISO 4762-M12 x 60-10.9-N67F821 70 2 910 151 354
NG35 6 x ISO 4762-M20 x 90-10.9-N67F821 70 2 910 151 532
VT-VRRA1-527-20/V0/2STV 0 811 405 063
VT-VRRA1-527-20/V0/RTS-2STV 0 811 405 073