一级代理力士乐REXROTH比例方向阀 力士乐Rexroth先导式比例方向阀：
型号 4WRKE 比例方向阀先导式
规格10至35
安装面按ISO 4401
控制流量的方向和大小
通过3通比例方向阀进行先导控制，无位置反馈
主阀芯的弹簧对中
力士乐型号 4WRBKE 比例方向阀先导式，有集成电控器（OBE）电位置反馈
规格10至35
安装面按ISO 4401
遮盖补偿，电子校准
通过3通比例方向阀进行先导控制，无位置反馈
主阀芯的弹簧对中 一级代理力士乐REXROTH比例方向阀 4WRKE25W8-350L-3X/6EG24ETK31/A5D3M
4WRKE16E125L-3X/6EG24EK31/A1D3M
4WRKE32W6-600L-3X/6EG24TK31/A1D3M
4WRKE10E100L-3X/6EG24EK31/A1D3M
4WRKE16E200L-3X/6EG24ETK31/A1D3M
4WRKE25W8-350L-3X/6EG24EK31/F1D3M
4WRKE10E50L-3X/6EG24EK31/A1D3M
4WRKE25R5-350L-3X/6EG24EK31/A1D3M-622
4WRKE16E1-200P-3X/6EG24K31/A5D3M
4WRKE16W1-200P-3X/6EG24EK31/A5D3M-706
4WRKE16W8-125L-3X/6EG24ETK31/F1D3M
4WRKE25W6-350L-3X/6EG24EK31/A1D3M
4WRKE10E50L-3X/6EG24ETK31/A1D3M
4WRKE16E200L-3X/6EG24EK31/A1D3M
4WRKE16E125L-3X/6EG24K31/A1D3M
4WRKE25E220S-3X/6EG24K31/A1D3M
4WRKE27W6-500L-3X/6EG24K31/A1D3M
4WRKE25E350L-3X/6EG24EK31/A1D3M
4WRKE32E600L-3X/6EG24K31/A1D3M
4WRKE25W8-220L-3X/6EG24EK31/F1D3M
4WRKE16W8-125L-3X/6EG24EK31/F1D3M
4WRKE16W8-200L-3X/6EG24EK31/F1D3M
4WRKE25E3-350L-3X/6EG24EK31/A1D3M
4WRKE25W8-220L-3X/6EG24ETK31/F1D3M
4WRKE35E1000L-3X/6EG24K31/A1D3M
4WRKE32W6-600L-3X/6EG24K31/A1D3M
4WRKE25E3-350P-3X/6EG24K31/A5D3M
4WRKE16W6-200L-3X/6EG24EK31/A1D3M
4WRKE16E1-200L-3X/6EG24K31/A5D3M
4WRKE25W6-220L-3X/6EG24EK31/A1D3M
4WRKE16R3-125L-3X/6EG24EK31/A1D3M
4WRKE16W6-200P-3X/6EG24EK31/A1D3M
4WRKE25W6-220L-3X/6EG24K31/A1D3M
4WRKE35E1000L-3X/6EG24K31/A1D3M-280
4WRKE16E125L-3X/6EG24K31/A1D3M-280
4WRKE25E350L-3X/6EG24K31/A1D3M-280
4WRKE32E600L-3X/6EG24EK31/A1D3M
4WRKE27W6-500L-3X/6EG24EK31/A1D3M
4WRKE16E3-125L-3X/6EG24K31/F1D3V
4WRKE16W8-125L-3X/6EG24ETK31/A1D3V
4WRKE25W8-220L-3X/6EG24ETK31/A1D3V
4WRKE16E200P-3X/6EG24EK31/A1D3M
4WRKE32W6-600L-3X/6EG24EK31/A1D3M
4WRKE16W6-200P-3X/6EG24EK31/F1D3M
4WRKE27E500L-3X/6EG24K31/A1D3M
4WRKE32W8-600L-3X/6EG24EK31/F1D3M
4WRKE27W8-500L-3X/6EG24ETK31/F1D3M
4WRKE10E1-50L-3X/6EG24K31/A1D3M
4WRKE10R3-50L-3X/6EG24ETK31/F1D3V
4WRKE10E25L-3X/6EG24EK31/A1D3M-280
4WRKE35W6-1000L-3X/6EG24K31/A1D3M
4WRKE10W8-100L-3X/6EG24K31/F1D3M
4WRKE10W8-100L-3X/6EG24EK31/F1D3M
4WRKE25W6-220L-3X/6EG24TK31/A1D3M
4WRKE25E1-220L-3X/6EG24K31/A1D3M-280
R901160405 4WRDE16V1-125L-5X/6L24TK9/M-280
R901147771 4WRDE25E1-220L-5X/6L24K9/M
R901102032 4WRDE16V1-200L-5X/6L24K9/V
R901047758 4WRDE25W1-350L-5X/6L24EK9/WG152M
R901047756 4WRDE10W1-100L-5X/6L24EK9/WG152M
R900702685 4WRDE16W1-200L-5X/6L24EK9/M
R900702612 4WRDE25V1-350L-5X/6L24EK9/WG152MR
R900699276 KOLBEN4WRDE25V350-41/
R900699274 KOLBEN4WRDE25W350-41/
R900699270 KOLBEN4WRDE16V200-41/
R900699269 KOLBEN4WRDE16W200-41/
R900699266 KOLBEN4WRDE10V100-41/
R900699265 KOLBEN4WRDE10V50-41/
R900699262 KOLBEN4WRDE10E100-41/
R900645078 KOLBEN4WRDE32W1-600-41/
R900639652 KOLBEN4WRDE16W125-41/
R900639275 KOLBEN4WRDE25W1/W2-500-41H/
R900639274 KOLBEN4WRDE25W500-41H/
R900637940 KOLBEN4WRDE10E1/E2-50-41/
R900634053 KOLBEN4WRDE16V125-40/
R900632108 KOLBEN4WRDE10W1/W2-100-40/
R900629797 KOLBEN4WRDE10E1/E2-100-40/
R900623685 FEDERLER4WRDE10.-40/
R900619532 4WRDE25V1-350L-5X/6L24K9/MR
R900617516 4WRDE16W5-200L-5X/6L24ETK9/WG152MR
R900555409 4WRDE10V100L-5X/6L15ETK9/MR
R900545419 GEHAEUSE4WRDE35E1000-41/
R901135024 4WRDE10V1-50L-5X/6L24K9/MR-280
R901134300 4WRDE16Q2-200P-5X/6L15K9/WG152MR
R901132087 4WRDE25V1-350L-5X/6L15K9/VR-280
R901131864 4WRDE16V125L-5X/6L24ETK9/WG152MR
R901131452 4WRDE25V350L-5X/6L15EK9/M
R901130863 4WRDE32V600L-5X/6L24K9/MR-576
R901130612 4WRDE16V200P-5X/6L24ETK9/MR-280
R901130572 4WRDE32E400L-5X/6L24EK9/MR
R901130248 4WRDE10V100S-5X/6L15ETK9/MR
R901129743 4WRDE32V600L-5X/6L24K9/MR-202
R901127196 4WRDE16V200P-5X/6L24K9/VR-576
R901127194 4WRDE10V100P-5X/6L24K9/VR-576
R901125441 4WRDE25V350L-5X/6L24K9/VR-576
R901125425 4WRDE16V125L-5X/6L24K9/V-576
R901122858 4WRDE32V600L-5X/6L24ETK9/MR
R901121801 4WRDE10V1-50L-5X/6L15K9/VR-280
R901120775 4WRDE25E3-350P-5X/6L24ETK9/WG152M
R901118086 4WRDE10V1-50S-5X/6L24K9/WG152MR
R901117439 4WRDE16E125L-5X/6L15EK9/WG152M
R901116616 4WRDE32V1-400L-5X/6L24K9/WG152MR
R901115253 4WRDE16V1-125S-5X/6L24K9/WG152MR
R901114170 4WRDE32V600L-5X/6L24K9/WG150MR-900
R901113536 4WRDE10V100R-5X/6L15EK9/MR
R901112269 4WRDE16W200L-5X/6L24ETK9/MR-280
R901111031 4WRDE25V220L-5X/6L24K9/M-576
R901105517 4WRDE25V350L-5X/6L15K9/VR-280
R901104990 4WRDE32W600L-5X/6L24K9/M
R901102032 4WRDE16V1-200L-5X/6L24K9/V
R901098903 4WRDE16W125L-5X/6L24ETK9/WG152M
R901097831 4WRDE10V50L-5X/6L15EK9/M-280
R901097630 4WRDE10V25L-5X/6L15K9/VR-280
R901096430 4WRDE16W200L-5X/6L24K9/WG152M
R901096284 4WRDE32V600L-5X/6L24K9/VR-881
R901095834 4WRDE10W1-100L-5X/6L24K9/V
R901095362 4WRDE25V220L-5X/6L15ETK9/WG152M
R901095318 4WRDE32W600L-5X/6L24K9/WG152M
R901094073 4WRDE10V1-100L-5X/6L24K9/V
R901093985 4WRDE16W200L-5X/6L24EK9/M
R901092003 4WRDE10V50L-5X/6L24EK9/MR
R901089060 4WRDE10E50P-5X/6L24K9/MR
R901085389 4WRDE25V220L-5X=6L15ETK9/WG152M
R901085388 4WRDE16V125L-5X=6L15ETK9/M
R901085364 4WRDE16W1-200L-5X/6L24TK9/M
R901083593 4WRDE25V350P-5X/6L24K9/MR
R901082785 4WRDE16V125P-5X/6L24TK9/M
R901079991 4WRDE27W500L-5X/6L24K9/MR-280
R901079988 4WRDE16W1-125L-5X/6L24K9/MR-280
R901079986 4WRDE16W1-200L-5X/6L24K9/MR-280
R901079949 4WRDE25V000S-5X/6L15K9/VR-469
R901079507 4WRDE25E1-350L-5X/6L24K9/WG152MR
R901079142 4WRDE27W1-500P-5X/6L24K9/WG152MR
R901078593 4WRDE16E1-125L-5X/6L24ETK9/WG152MR
R901078127 4WRDE10V1-100P-5X/6L24TK9/MR
R901075852 4WRDE25V220L-5X/6L24TK9/WG152M-280
R901075442 4WRDE16V125L-5X/6L24TK9/M-280
R901074358 4WRDE16V125L-5X/6L24ETK9/M-280
R901074350 4WRDE32V400L-5X/6L24K9/MR
R901072877 4WRDE10V50L-5X/6L24TK9/MR-280
R901072551 4WRDE16V125L-5X/6L24TK9/V
R901070226 4WRDE32V400L-5X/6L24K9/WG152MR
R901068907 4WRDE10V25L-5X/6L24TK9/M
R901068457 4WRDE25V220L-5X/6L15K9/MR-881
R901067986 4WRDE32E600L-5X/6L24K9/M
R901067238 4WRDE16V125L-5X/6L24ETK9/MR
R901065914 4WRDE10E100L-5X/6L24EK9/M-280
R901064065 4WRDE27W500L-5X/6L24K9/M
R901064064 4WRDE16W1-200L-5X/6L24K9/M
R901064061 4WRDE25V1-350L-5X/6L24K9/M
R901063828 4WRDE16E1-125L-5X/6L24K9/WG152M
R901063272 4WRDE10V50L-5X/6L24ETK9/MR-202
R901062725 4WRDE32V400L-5X/6L24K9/MR-280
R901061080 4WRDE25V220L-5X/6L24ETK9/M-576
R901052545 4WRDE16V200L-5X/6L24TK9/MR-280
R901050179 4WRDE10V1-50L-5X/6L24ETK9/M-280
R901049339 4WRDE16V1-125L-5X/6L24K9/WG152MR
R901048599 4WRDE16E125P-5X/6L24ETK9/M-280
R901047780 4WRDE10V50L-5X/6L24TK9/V
R901047758 4WRDE25W1-350L-5X/6L24EK9/WG152M
R901047756 4WRDE10W1-100L-5X/6L24EK9/WG152M
R901030042 4WRDE25V350L-5X/6L15ETK9/VR
R901026319 4WRDE10E100L-5X/6L24TK9/WG152M
R901025630 4WRDE25E350S-5X/6L24K9/M-280
R901027139 4WRDE25V350S-5X/6L24EK9/M
R901024133 4WRDE10V50L-5X/6L24ETK9/MR-280
R901023490 4WRDE16V1-200L-5X/6L24ETK9/M-280
R901023038 4WRDE32V1-600L-5X/6L24K9/WG152M
R901020022 4WRDE10V50L-5X/6L24K9/MR-280
R901019798 4WRDE10E100L-5X/6L24K9/WG152M
R901014735 4WRDE25V350P-5X/6L15K9/M
R901006764 4WRDE10V50L-5X/6L15TK9/MR
R900979800 4WRDE16V125L-5X/6L15ETK9/M
R900979616 4WRDE10W1-100L-5X/6L24K9/M
R900978574 4WRDE10V1-50P-5X/6L24ETK9/M
R900978379 4WRDE10V100L-5X/6L24ETK9/MR
R900978347 4WRDE10V50L-5X/6L24TK9/M
R900978280 4WRDE25V350L-5X/6L24K9/MR
R900977457 4WRDE16E125L-5X/6L24K9/WG152M
R900977162 4WRDE10V50P-5X/6L24ETK9/MR-202
R900976154 4WRDE16V1-200P-5X/6L24K9/MR
R900975626 4WRDE25E220L-5X/6L24K9/M
R900975600 4WRDE10V50L-5X/6L24K9/MR-202
R900975265 4WRDE16V125L-5X/6L24K9/VR-202
R900975009 4WRDE10V100L-5X/6L24K9/VR
R900974146 4WRDE35E1000P-5X/6L15K9/M
R900973360 4WRDE16V125L-5X/6L24K9/MR-202
R900973309 4WRDE16V1-125L-5X/6L24K9/M
R900971441 4WRDE10V50L-5X/6L24K9/M-280
R900971418 4WRDE10V100L-5X/6L24K9/MR-202
R900971342 4WRDE27V500L-5X/6L24K9/M
R900971284 4WRDE16V125L-5X/6L24TK9/M
R900971202 4WRDE27Q2-500P-5X/6L24K9/WG152MR
R900970880 4WRDE25V350P-5X/6L24K9/M
R900970846 4WRDE10W50L-5X/6L15EK9/M-280
R900970845 4WRDE10V50L-5X/6L15K9/M-280
R900970729 4WRDE25V350L-5X/6L24EK9/M
R900970576 4WRDE10V1-100L-5X/6L24K9/MR
R900970131 4WRDE10Q2-100P-5X/6L24K9/WG152MR
R900970066 4WRDE10V25L-5X/6L24K9/M
R900969670 4WRDE10V100L-5X/6L24K9/MR-280
R900969611 4WRDE25E350L-5X/6L15K9/M
R900969061 4WRDE16V200L-5X/6L24K9/MR-202
R900969051 4WRDE10V50L-5X/6L15ETK9/M
R900968714 4WRDE35E1000P-5X/6L24K9/M
R900968423 4WRDE16V000S-5X/6L15K9/WG152M-488
R900968197 4WRDE10W50P-5X/6L24K9/MR-280
R900968194 4WRDE16V125P-5X/6L24K9/MR-280
R900967620 4WRDE10V50P-5X/6L24K9/M
R900967608 4WRDE10V100P-5X/6L24K9/WG152MR-478
R900967553 4WRDE10V100L-5X/6L15K9/MR
R900967049 4WRDE16V1-200L-5X/6L24ETK9/MR
R900966882 4WRDE32V600L-5X/6L24K9/MR-280
R900966563 4WRDE10V100L-5X/6L24K9/MR
R900966154 4WRDE16V1-125S-5X/6L15K9/WG152M-259
R900965991 4WRDE16W3-200P-5X/6L24K9/WG152MR
R900965671 4WRDE27E500P-5X/6L15K9/M
R900965596 4WRDE16V200L-5X/6L24TK9/WG152MR
R900965420 4WRDE16E200L-5X/6L24K9/WG152MR
R900965411 4WRDE10V25L-5X/6L24ETK9/MR
R900965242 4WRDE10V50L-5X/6L24EK9/M
R900965189 4WRDE32X600P-5X/6L24K9/V-317
R900965139 4WRDE25V1-350L-5X/6L24K9/MR-280
R900964881 4WRDE16V125P-5X/6L24K9/WG152V
R900964878 4WRDE16V1-200P-5X/6L24K9/WG152VR
R900964876 4WRDE16V1-125P-5X/6L24K9/WG152V
R900964740 4WRDE25V350L-5X/6L15K9/MR-280
R900964392 4WRDE10V25L-5X/6L15K9/MR
R900964258 4WRDE10V1-100L-5X/6L24K9/WG152MR
R900964249 4WRDE16V200L-5X/6L24K9/WG152MR
R900964182 4WRDE25E350P-5X/6L24K9/M
R900963959 4WRDE16W1-125L-5X/6L24K9/M
R900963761 4WRDE10V50L-5X/6L15K9/MR
R900963754 4WRDE16E1-200L-5X/6L24K9/WG082M-478
R900963322 4WRDE10V100L-5X/6L15ETK9/M
R900962952 4WRDE10Q2-100P-5X/6L24K9/MR
R900962868 4WRDE16E125L-5X/6L24TK9/WG152MR
R900962823 4WRDE10V100L-5X/6L24TK9/WG152M
R900962577 4WRDE16V1-125L-5X/6L15K9/MR
R900962078 4WRDE25V350L-5X/6L24K9/WG152MR
R900961518 4WRDE25V350L-5X/6L24K9/MR-202
R900961105 4WRDE16E125L-5X/6L24K9/MR
R900961013 4WRDE10V25L-5X/6L24ETK9/WG152MR
R900960824 4WRDE16V1-200L-5X/6L24K9/WG152MR
R900960820 4WRDE16V200L-5X/6L24K9/VR
R900960819 4WRDE16V125L-5X/6L24K9/VR
R900960616 4WRDE16V200L-5X/6L15K9/MR-280
R900960357 4WRDE10V25L-5X/6L24K9/MR-280
R900960138 4WRDE16V125L-5X/6L24TK9/WG152MR
R900960137 4WRDE10V1-50L-5X/6L24EK9/M
R900959726 4WRDE10V25L-5X/6L24K9/MR-202
R900959699 4WRDE16V125L-5X/6L24K9/MR
R900959564 4WRDE16V125L-5X/6L24K9/M-202
R900959510 4WRDE16V125L-5X/6L15K9/M-280
R900959397 4WRDE10V1-100L-5X/6L24ETK9/M
R900959210 4WRDE25V220L-5X/6L24K9/MR
R900959029 4WRDE16Q2-200P-5X/6L24K9/WG152MR
R900958937 4WRDE16V000S-5X/6L15K9/WG152M-489
R900958681 4WRDE16V000S-5X/6L24K9/WG152M-488
R900958444 4WRDE32E3-600L-5X/6L24K9/WG152MR
R900958052 4WRDE16V200P-5X/6L24K9/MR
R900958017 4WRDE32V600P-5X/6L15K9/M
R900957581 4WRDE16V200L-5X/6L24K9/MR
R900957525 4WRDE16V125L-5X/6L24K9/WG152MR
R900957419 4WRDE16V1-200L-5X/6L24K9/MR
R900956902 4WRDE32V1-600L-5X/6L24K9/WG152MR
R900956672 4WRDE16E125P-5X/6L24EK9/M
R900956578 4WRDE10V50P-5X/6L15K9/WG152M
R900956352 4WRDE16E200L-5X/6L24K9/MR
R900956023 4WRDE16V1-200L-5X/6L24K9/MR-280
R900955792 4WRDE25V1-350L-5X/6L24K9/WG152MR
R900955582 4WRDE16V125L-5X/6L24K9/WG152MR-478
R900954449 4WRDE25V350L-5X/6L24K9/VR
R900954192 4WRDE32V600L-5X/6L24K9/WG152M
R900954191 4WRDE32V600L-5X/6L24ETK9/WG152M
R900954190 4WRDE32V600L-5X/6L24K9/M
R900954189 4WRDE25V1-350L-5X/6L24K9/WG152M
R900954188 4WRDE25V350L-5X/6L24ETK9/WG152M
R900954186 4WRDE25V350L-5X/6L24K9/M
R900954185 4WRDE25V350L-5X/6L24ETK9/M
R900954184 4WRDE25V220L-5X/6L24K9/WG152M
R900954183 4WRDE25V220L-5X/6L24K9/M
R900954182 4WRDE25V220L-5X/6L24ETK9/M
R900954181 4WRDE16V1-200L-5X/6L24K9/WG152M
R900954180 4WRDE16V1-125L-5X/6L24ETK9/WG152M
R900954179 4WRDE16V200L-5X/6L24K9/WG152M
R900954178 4WRDE16V200L-5X/6L24ETK9/WG152M
R900954177 4WRDE16V200L-5X/6L24K9/M
R900954176 4WRDE16V200L-5X/6L24ETK9/M
R900954175 4WRDE16V125L-5X/6L24K9/WG152M
R900954174 4WRDE16V125L-5X/6L24ETK9/WG152M
R900954172 4WRDE16V125L-5X/6L24ETK9/M
R900954171 4WRDE10V1-100L-5X/6L24K9/WG152M
R900954170 4WRDE10V1-50L-5X/6L24ETK9/WG152M
R900954169 4WRDE10V100L-5X/6L24K9/WG152M
R900954168 4WRDE10V100L-5X/6L24ETK9/WG152M
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REXROTH比例方向阀是一种直观简便的流量调节控制装置，管网中应用此阀可直接根据设计来设定流量，阀门可在水作用下，自动消除管线的剩余压头及压力波动所引起的流量偏差，无论系统压力怎样变化均保持设定流量不变，该阀这些功能使管网流量调节一次完成，把调网工作变为简单的流量分配，有效的解决管网的水力失调。REXROTH比例方向阀主要应用于：集中供热（冷）等水系统中，使管网流量按需分配，消除水系统水力失调，解决冷热不均问题，可节能、节电15%-20%。
REXROTH比例方向阀从结构上说，是一个双阀组合，即由一个手动调节阀组和自动平衡阀组组成，手动调节阀组的作用是设定流量，自动平衡阀组的作用是维持流量恒定。
对于手动调节阀组来说，流量G=Kv（P2-P3）,Kv的大小取决于开度，开度不变，则流量G不变，而P2-P3的恒定是由自动平衡阀组控制的。比如进出口压差P1-P3增大，则通过感压膜和弹簧的作用使自动平衡阀组关小，使P1-P2增大，从而维持P2-P3的恒定；反之P1-P3减小，则自动平衡阀组开大，使P1-P2减小，从而维持P2-P3的恒定。既在管网压力变化时，自动阀芯就会在压力的作用下自动开大或关小阀口来维持设定流量数值不变。手动调节阀组的每一个开度对应一个流量，开度和流量的关系由试验台试验标定，并配有开度的显示和锁定装置。 REXROTH比例方向阀是在一定压力差下，依靠改变节流口液阻的大小来控制节流口的流量，从而调节执行元件（液压缸或液压马达）运动速度的阀类。
REXROTH比例方向阀主要包括节流阀、调速阀、溢流节流阀和分流集流阀等。此阀一般水平安装
REXROTH比例方向阀产品特点：
REXROTH比例方向阀又称400X比例方向阀,是一种采用高精度先导方式控制流量的多功能阀门。适用于配水管需控制流量和压力的管路中，保持预定流量不变，将过大流量限制在一个预定值，并将上游高压适当减低，即使主阀上游的压力发生变化，也不会影响主阀下游的流量。 REXROTH比例方向阀原理
1、一改常规节流阀使用孔板或纯机械的减小流域面积的原理，利用相关导阀，zui大限度地减小能量在节流过程中的损失
2、控制灵敏度高，安全可靠，调试简便，使用寿命长。
REXRITG比例方向阀可在没有外接电源的情况下，自动实现系统的流量平衡。是通过保持孔板（固定孔径）前后压差一定而实现流量限定的，因此，也可称定流量阀。
定流量阀作用对象是流量，能够锁定流经阀门的水量，而不是针对阻力的平衡。他能够解决系统的动态失调问题：为了保持单台制冷机、锅炉、冷却塔、换热器这些设备的高效率运行，就需要控制这些设备流量固定于额定值；从系统末端来看，为了避免动态调节的相互影响，也需要在末端装置或分支处限制流量。 在设计中应注意的问题，流量控制阀的缺点是在于阀门有zui小工作差的要求，一般产品要求zui小工作压差20KPa，如果安装在zui不利回路上，势必要求循环水泵多增加2米水柱的工作扬程，所以应采取近端安装，远端不安的方法。
1）按照气体在管道的流动方向，如果只允许气体向一个方向流动，这样的阀叫做单向型控制阀，比如单向阀，梭阀等；可以改变气体流向的控制阀叫做换向阀，比如常用的2way2port，2way3port，2way5port，3way5port等。
2）按照控制方式可分为电磁阀，机械阀，气控阀，人控阀。其中电磁阀又可以分为单和双电控阀两种；机械阀可分为球头阀，滚轮阀等多种；气控阀也可分为单气控和双气控阀；人力阀
可以分为手动阀，脚踏阀两种。
3）按工作原理可以分为直动阀和先导阀，直动阀就是靠人力或者电磁力，气动力直接实现换向要求的阀；先导阀是由先导头和阀主体2部分构成，有先导头活塞驱动阀主体里面的阀杆实现换向。
4）根据换向阀杆的工作位置可以将阀分为2way，3way阀。
5）根据阀上气孔的多少来进行划分，可以分为2port，3port，5port阀。 REXROTH比例方向阀无需辅助能源，简单可靠。常用的有减压阀、溢流阀、压差控制阀、温度控制阀等。各种不同的控制系统达到*的控制效果需要对控制参数进行*化。高阶控制系统中zui主要的影响参数是滞后时间（Tu），因为测量单元需要一段时间来辨识输入信号或干扰信号。现代微处理技术极大地帮助了我们，问题大大简化。在输入实测值的模拟量后，信号被转换为数字信号。数字信号的处理时间大大缩短且信号可*再现。设定值和实际值比的差值也是数字量，即偏差Dw，偏差又转换为相应的控制信号传给控制阀。控制参数的自适应调整由微处理器完成。经过数次循环调节后，控制器辨识出滞后时间（Tu）并对控制参数自动调节，从而减小Tu的影响。 REXROTH比例方向阀和电动、气动执行阀均配有相应的传感器（如压力、温度传感器）。我们的许多传感器，尤其是用于温度和压力自力式控制阀的传感器，性能**，可提供特殊的解决方案！
REXROTH比例方向阀是由手动调节部分和自动调节部分（自力式压差控制阀）组成。手动调节部分设定每一个开度对应一个Kv值，由自动调节部分（自力式压差控制阀）控制手动调节部分的前后压差不变。
REXROTH比例方向阀的基本定义：在一定的压差范围内，恒定被控系统的流量，作用对象是系统的流量。当外网压力波动时被控系统不受影响。
REXROTH比例方向阀应用：
1、适用于大型的热力管网上是流量分配变得简单快捷。
2、适用于逐年并网的系统，新系统地加入不影响原来的系统。
3、适用于风机盘管和空气处理机冷却机、冷水机、冷却塔等设备的定流量运行。
4、单管跨越式系统的立管的流量控制。 
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