溢流减压阀是靠进气口的节流作用减压，靠膜片上力的平衡作用和溢流孔的溢流作用稳压；调节弹簧即可使输出压力在一定范围内改变。为防止以上溢流式减压阀徘出少量气体对周围环境的污染，可采用不带溢流阀的减压阀（即普通减压阀）。减压阀是气动调节阀的一个必备配件，主要作用是将气源的压力减压并稳定到一个定值，以便于调节阀能够获得稳定的气源动力用
在这种情况下，建议使用减压阀或减压阀站。减压阀既可以允许将驱动压力维持在能够满足泵排量的设定压力，同时也可以保护进气阀不受磨损。另外，在应用空间较狭窄时，建议使用带集汽管的减压阀站。在泵水过程中，集汽管为泵供汽从而为泵提供了缓冲区。这个缓冲区使整个装置的动作柔和，减少对减压阀的磨损。
减压阀的作用原理是靠阀内流道对水流的局部阻力降低水压，水压降的范围由连接阀瓣的薄膜或活塞两侧的进出口水压差自动调节。定比减压原理是利用阀体中浮动活塞的水压比控制，进出口端减压比与进出口侧活塞面积比成反比。这种减压阀工作平稳无振动；阀体内无弹簧，故无弹簧锈蚀、金属疲劳失效之虑；密封性能良好不渗漏，因而既减动压（水流动时）又减静压

溢流阀：
BG-06-32
BSG-03-2B2-A240-4745 BSG-03-2B3B-D24-N-46
BST-06-2B3B-A240-N-46
MTP-02 MTP-03 MTT-03 MTT-02 MBP-02-C MBP-02-H MBA-02-C MBA-02-H MBB-02-C MBB-02-H
MRP-02-B MRP-02-C MRP-02-H MRA-02-B MRA-02-C MRA-02-H MRB-02-B MRB-02-C MRB-02-H
MSW-02-XY MSW-02-YX MSA-02-X MSA-02-Y MSB-02-X MSB-02-Y MSW-02-X MSW-02-Y
MPA-02-2 MPA-02-4 MPB-02-2 MPB-02-4 MPW-02-2 MPW-02-4 MBP-01-0-10T
MCP-02-0 MCP-02-2 MCP-02-4 MCT-02-0 MCT-02-2 MCT-02-4
MBP-03-B MBP-03-H MBA-03-B MBA-03-H MBB-03-B MBB-03-H MBW-03-B MBW-03-H
MBP-04-B MBP-04-H MBA-04-B MBA-04-H MBB-03-B MBB-04-H MBW-04-B MBW-04-H
MRP-03-B MRP-03-H MRA-03-B MRA-03-H MRB-03-B MRB-03-H
MRP-04-B MRP-04-H MRA-04-B MRA-04-H MRB-04-B MRB-04-H
MSA-03-X MSA-03-Y MSB-03-X MSB-03-Y MSW-03-X MSW-03-Y
MSA-04-X MSA-04-Y MSB-04-X MSB-04-Y MSW-04-X MSW-04-Y
MPA-03-2 MPA-03-4 MPB-03-2 MPB-03-4 MPW-03-2 MPW-03-4
MPA-04-2 MPA-04-4 MPB-04-2 MPB-04-4 MPW-04-2 MPW-04-4
MCP-03-0 MCP-03-2 MCA-03-0 MCA-03-2 MCB-03-0 MCB-03-2 MCT-03-0 MCT-03-2
DG-01-22
EBG-03-B-20 EBG-03-C-20 EBG-03-H-20 EBG-06-B-20 EBG-06-C-20 EBG-06-H-20
EBG-10-B-20 EBG-10-C-20 EBG-10-H-20 EBG-10-B-T-20 EBG-10-T-C-20 EBG-10-T-H-20
EBG-03-B-T-20 EBG-03-C-T-20 EBG-03-H-T-20 EBG-06-B-T-20 EBG-06-C-T-20 EBG-06-H-T-20
Y1-F6D-P/0 Y-F6D-A/0 Y-F6D-B/0 Y1-F10D-P/0-1 Y1-F16D
单向阀：
CIT-06-05-50
液控单向阀：
CPDG-03-E-30-20 CPDG-03-E-35-50 CPDG-10-35-50
CRG-03-04-50 CRG-06-04-50 CRG-10-04-50 CRG-10-35-50
手动换向阀：
DMG-01-2D2-10 DMG-03-3C2-50
电磁换向阀
DSG-01-2B12B-D24-50-L DSG-01-2B2-A110-50 DSG-01-2B2-A200-70 DSG-01-2B2-A220-50 DSG-01-2B2-A240
DSG-01-2B2-A240-70 DSG-01-2B2B-A220-50 DSG-01-2B2B-D24-50 DSG-01-2B2B-D24-N1-50
DSG-01-2B2-D24-50
DSG-01-2B2-D24-N1-50 DSG-01-2B2-D24-N-70 DSG-01-2B3B-A220-50 DSG-01-2B3B-A220-50(Y)
DSG-01-2B3B-A220-N1-50
DSG-01-2B3B-D24-50 DSG-01-2B3B-D24-N-50 DSG-01-2B3B-D24V DSG-01-2B3-D24-50
DSG-01-2B8-D24-N-50 DSG-01-2D2-A100-70 DSG-01-2D2-A240-70 DSG-01-2D2-D24-50 DSG-01-3C2-A100-70
DSG-01-3C2-A110-50 DSG-01-3C2-A110-N1-50 DSG-01-3C2-A200-N-70 DSG-01-3C2-A220-50 DSG-01-3C2-A240-70
DSG-01-3C2-A240-N-70
DSG-01-3C2-D24-N1-50 DSG-01-3C2-D24-N-70 DSG-01-3C3-A240-70 DSG-01-3C3-A240-N-50 DSG-01-3C3-D24-50
DSG-01-3C3-D24-N1-50 DSG-01-3C3-D24-N-50 DSG-01-3C4-A100-70 DSG-01-3C4-A110-50 DSG-01-3C4-A200-C-N-50-L
DSG-01-3C4-A220-50 DSG-01-3C4-A240-60 DSG-01-3C4-A240-70 DSG-01-3C4-A240-N-50 DSG-01-3C4-D24-50
DSG-01-3C4-D24-70 DSG-01-3C4-D24-N1-50 DSG-01-3C4-D24-N-70 DSG-01-3C60-A220-50 DSG-01-3C60-D24-50
DSG-01-3C60-D24-N1-50 DSG-01-3C9-A220-50(70) DSG-01-3C9-D24-70(50) DSG-02-2B20-A1-10 DSG-02-2B20-A1-20
DSG-02-2B20-A2-10 DSG-02-2B20-D2-10 DSG-02-2B20-D2-20 DSG-02-2B20S-A1-10 DSG-02-2B20S-A1-20 DSG-02-2B20S-A2-10
DSG-02-2B20S-D2-10 DSG-02-2B20S-D2-20 DSG-02-2B2-A1-10 DSG-02-2B2-A1-20 DSG-02-2B2-A2-10 DSG-02-2B2-D2-10
DSG-02-2B2-D2-20 DSG-02-2B2S-A1-10 DSG-02-2B2S-A1-20 DSG-02-2B2S-A2-10 DSG-02-2B2S-D2-10 DSG-02-2B2S-D2-20
DSG-02-2B3-A1-10 DSG-02-2B3-A1-20 DSG-02-2B3-A2-10 DSG-02-2B3-D2-10 DSG-02-2B3-D2-20 DSG-02-2B3S-A1-10
DSG-02-2B3S-A1-20 DSG-02-2B3S-A2-10 DSG-02-2B3S-D2-10 DSG-02-2B3S-D2-20 DSG-02-2B40-A1-10 DSG-02-2B40-A1-20
DSG-02-2B40-A2-10 DSG-02-2B40-D2-10 DSG-02-2B40-D2-20 DSG-02-2C2B-A1-10 DSG-02-2C2B-A1-20 DSG-02-2C2B-A2-10
DSG-02-2C2B-D2-10 DSG-02-2C2B-D2-20 DSG-02-2C2BS-A1-10 DSG-02-2C2BS-A1-20 DSG-02-2C2BS-A2-10 DSG-02-2C2BS-D2-10
DSG-02-2C2BS-D2-20 DSG-02-2C3B-A1-10 DSG-02-2C3B-A1-20 DSG-02-2C3B-A2-10 DSG-02-2C3B-D2-10 DSG-02-2C3B-D2-20
DSG-02-2C3BS-A1-10 DSG-02-2C3BS-A1-20 DSG-02-2C3BS-A2-10 DSG-02-2C3BS-D2-10 DSG-02-2C3BS-D2-20
DSG-02-2C40B-A1-10 DSG-02-2C40B-A1-20 DSG-02-2C40B-A2-10 DSG-02-2C40B-D2-10 DSG-02-2C40B-D2-20
DSG-02-2C40BS-A1-10 DSG-02-2C40BS-A1-20 DSG-02-2C40BS-A2-10 DSG-02-2C40BS-D2-10 DSG-02-2C40BS-D2-20
DSG-02-2C4B-A1-10 DSG-02-2C4B-A1-20 DSG-02-2C4B-A2-10 DSG-02-2C4B-D2-10 DSG-02-2C4B-D2-20 DSG-02-2C4BS-A1-10
DSG-02-2C4BS-A1-20 DSG-02-2C4BS-A2-0 DSG-02-2C4BS-D2-10 DSG-02-2C4BS-D2-20 DSG-02-2C5B-A1-10
DSG-02-2C5B-A1-20 DSG-02-2C5B-A2-10 DSG-02-2C5B-D2-10 DSG-02-2C5B-D2-20 DSG-02-2C5BS-A1-10 DSG-02-2C5BS-A1-20
DSG-02-2C5BS-A2-10 DSG-02-2C5BS-D2-10 DSG-02-2C5BS-D2-20 DSG-02-2C5SB-A1-10 DSG-02-2C5SB-A1-20
DSG-02-2C5SB-A2-10 DSG-02-2C5SB-D2-10 DSG-02-2C5SB-D2-20 DSG-02-2C60B-A1-10 DSG-02-2C60B-A1-20
DSG-02-2C60B-A2-10 DSG-02-2C60B-D2-10 DSG-02-2C60B-D2-20 DSG-02-2C60BS-A1-10 DSG-02-2C60BS-A1-20
DSG-02-2C60BS-A2-10 DSG-02-2C60BS-D2-10 DSG-02-2C60BS-D2-20 DSG-02-2C6B-A1-10 DSG-02-2C6B-A1-20
DSG-02-2C6B-A2-10 DSG-02-2C6B-D2-10 DSG-02-2C6B-D2-20 DSG-02-2C6BS-A1-10 DSG-02-2C6BS-A1-20
DSG-02-2C6BS-A2-10 DSG-02-2C6BS-D2-10 DSG-02-2C6BS-D2-20 DSG-02-2C7B-A1-10 DSG-02-2C7B-A1-20 DSG-02-2C7B-A2-10
DSG-02-2C7B-D2-10 DSG-02-2C7B-D2-20 DSG-02-2C7BS-A1-10 DSG-02-2C7BS-A1-20 DSG-02-2C7BS-A2-10 DSG-02-2C7BS-D2-10
DSG-02-2C7BS-D2-20 DSG-02-2C8B-A1-10 DSG-02-2C8B-A1-20 DSG-02-2C8B-A2-10 DSG-02-2C8B-D2-10 DSG-02-2C8B-D2-20
DSG-02-2C8BS-A1-10 DSG-02-2C8BS-A1-20 DSG-02-2C8BS-A2-10 DSG-02-2C8BS-D2-10 DSG-02-2C8BS-D2-20
DSG-02-2C8SB-A1-10 DSG-02-2C8SB-A1-20 DSG-02-2C8SB-A2-10 DSG-02-2C8SB-D2-10 DSG-02-2C8SB-D2-20
DSG-02-2C9B-A1-10 DSG-02-2C9B-A1-20 DSG-02-2C9B-A2-10 DSG-02-2C9B-D2-10 DSG-02-2C9B-D2-20 DSG-02-2C9BS-A1-10
DSG-02-2C9BS-A1-20 DSG-02-2C9BS-A2-10 DSG-02-2C9BS-D2-10 DSG-02-2C9BS-D2-20 DSG-02-2C9SB-A1-10
DSG-02-2C9SB-A1-20 DSG-02-2C9SB-A2-10 DSG-02-2C9SB-D2-10 DSG-02-2C9SB-D2-20 DSG-02-2D2-A1-10 DSG-02-2D2-A1-20
DSG-02-2D2-A2-10 DSG-02-2D2-D2-10 DSG-02-2D2-D2-20 DSG-02-2D3-A1-10 DSG-02-2D3-A1-20 DSG-02-2D3-A2-10
DSG-02-2D3-D2-10 DSG-02-2D3-D2-20 DSG-02-3C2-A1-10 DSG-02-3C2-A1-20 DSG-02-3C2-A2-10 DSG-02-3C2-D2-10
DSG-02-3C2-D2-20 DSG-02-3C3-A1-20 DSG-02-3C3-A2-10 DSG-02-3C3-D2-10 DSG-02-3C3-D2-20 DSG-02-3C40-A1-10
DSG-02-3C40-A1-20 DSG-02-3C40-A2-10 DSG-02-3C40-D2-10 DSG-02-3C40-D2-20 DSG-02-3C4-A1-10 DSG-02-3C4-A1-20
DSG-02-3C4-A2-10 DSG-02-3C4-D2-10 DSG-02-3C4-D2-20 DSG-02-3C5-A1-10 DSG-02-3C5-A1-20 DSG-02-3C5-A2-10
DSG-02-3C5-D2-10 DSG-02-3C5-D2-20 DSG-02-3C60-A1-10 DSG-02-3C60-A1-20 DSG-02-3C60-A2-10 DSG-02-3C60-D2-10
DSG-02-3C60-D2-20 DSG-02-3C6-A1-10 DSG-02-3C6-A1-20 DSG-02-3C6-A2-10 DSG-02-3C6-D2-10 DSG-02-3C6-D2-20
DSG-02-3C7-A1-10 DSG-02-3C7-A1-20 DSG-02-3C7-A2-10 DSG-02-3C7-D2-10 DSG-02-3C7-D2-20 DSG-02-3C8-A1-10
DSG-02-3C8-A1-20 DSG-02-3C8-A2-10 DSG-02-3C8-D2-10 DSG-02-3C8-D2-20 DSG-02-3C9-A1-10 DSG-02-3C9-A1-20
DSG-02-3C9-A2-10 DSG-02-3C9-D2-10 DSG-02-3C9-D2-20 DSG-02-C5S-A1-10 DSG-02-C5S-A1-20 DSG-02-C5S-A2-10
DSG-02-C5S-D2-10 DSG-02-C5S-D2-20 DSG-02-C8S-A1-10 DSG-02-C8S-A1-20 DSG-02-C8S-A2-10 DSG-02-C8S-D2-10
DSG-02-C8S-D2-20 DSG-02-C9S-A1-10 DSG-02-C9S-A1-20 DSG-02-C9S-A2-10 DSG-02-C9S-D2-10 DSG-02-C9S-D2-20
DSG-03-2B2-A110-50 DSG-03-2B2-A200-50 DSG-03-2B2-A220-D24-50 DSG-03-2B2-A220-N1-50 DSG-03-2B2B-A220-D24-50
DSG-03-2B2B-D24 DSG-03-2B2-D24-50L DSG-03-2B3-A110-50 DSG-03-2B3B-A240-N-50 DSG-03-2B8-A220-L(Y)
DSG-03-2B8-D24-N DSG-03-2C2-D24-50 DSG-03-2D2-A100-50 DSG-03-2D2-A110-50 DSG-03-2D2-A220-N1-50
DSG-03-2D2-D24-50 DSG-03-2D2-D24-C-N1-50 DSG-03-3C12-D24 DSG-03-3C2-A100-50 DSG-03-3C2-A220-50
DSG-03-3C2-A220-N-50 DSG-03-3C2-A240-50 DSG-03-3C2-A240-N1-50 DSG-03-3C2-A240-N-50 DSG-03-3C2-D24
DSG-03-3C2-D24-50 DSG-03-3C2-D24-N1-50 DSG-03-3C2-D24-N-50 DSG-03-3C2-D24-N-70 DSG-03-3C2-R220-50
DSG-03-3C3-R110-50 DSG-03-3C40-D24 DSG-03-3C4-A100-50 DSG-03-3C4-A110-50 DSG-03-3C4-A200-50 DSG-03-3C4-A220-50
DSG-03-3C4-A240-50 DSG-03-3C4-A240-N1-50 DSG-03-3C4-A240-N-50 DSG-03-3C4-D24-50 DSG-03-3C4-D24-C-N1-50
DSG-03-3C4-D24-N1-50 DSG-03-3C4-D24-N-50 DSG-03-3C60-A110-50 DSG-03-3C60-A220-50 DSG-03-3C60-A240-5006
DSG-03-3C60-A240-N-50 DSG-03-3C60-D24-50 DSG-04-3C60-E-D24-50
电液换向阀：
DSGH-06-3C4-A100-51 DSHG-01-3C2-T-A240-N1-50 DSHG-03-3C2-D24-13 DSHG-04-2B2-A110-20 DSHG-04-2B2-A220-20
DSHG-04-2B2-D24-20 DSHG-04-2B2-T-D24-51
DSHG-04-2B3-A110-20 DSHG-04-2B3-A220-20 DSHG-04-2B3-D24-20 DSHG-04-2B40-A110-20 DSHG-04-2B40-A220-20
DSHG-04-2B40-D24-20 DSHG-04-2B4-A110-20 DSHG-04-2B4-A220-20 DSHG-04-2B4-D24-20 DSHG-04-2B7-A110-20
DSHG-04-2B7-A220-20 DSHG-04-2B7-D24-20 DSHG-04-3C10-A110-20 DSHG-04-3C10-A220-20 DSHG-04-3C10-D24-20
DSHG-04-3C10-D24-51 DSHG-04-3C11-A110-20 DSHG-04-3C11-A220-20 DSHG-04-3C11-D24-20 DSHG-04-3C12-A110-20
DSHG-04-3C12-A220-20 DSHG-04-3C12-D24-20 DSHG-04-3C12-E-D24-50 DSHG-04-3C2-A110-20 DSHG-04-3C2-A220-20
DSHG-04-3C2-D24-20 DSHG-04-3C2-E-D24-50 DSHG-04-3C2-T-A220-N1-50 DSHG-04-3C3-A110-20 DSHG-04-3C3-A220-20
DSHG-04-3C3-D24-20 DSHG-04-3C40-A110-20 DSHG-04-3C40-A220-20 DSHG-04-3C40-D24-20 DSHG-04-3C4-A110-20
DSHG-04-3C4-A220-20 DSHG-04-3C4-C2-T-D24-N1-50 DSHG-04-3C4-D24-20 DSHG-04-3C4-D24-N1-52 DSHG-04-3C4-D24-N-52
DSHG-04-3C4-T-D24-N1-51 DSHG-04-3C5-A110-20 DSHG-04-3C5-A220-20 DSHG-04-3C5-D24-20 DSHG-04-3C60-A110-20
DSHG-04-3C60-A220-20 DSHG-04-3C60-D24-20 DSHG-04-3C60-E-D24-50 DSHG-04-3C6-A110-20 DSHG-04-3C6-A220-20
DSHG-04-3C6-D24-20 DSHG-04-3C7-A110-20 DSHG-04-3C7-A220-20 DSHG-04-3C7-D24-20 DSHG-04-3C9-A110-20
DSHG-04-3C9-A220-20 DSHG-04-3C9-D24-20 DSHG-06-3C10-C2-T-D24-N-50 DSHG-06-3C12-ET-A110-50 DSHG-06-3C2-A220-50
DSHG-06-3C2-ET-A220-50 DSHG-06-3C2-ET-A220-50(Y) DSHG-06-3C3-C2-E-T-A24-N1-50 DSHG-06-3C4-A100-53
DSHG-06-3C60-C1C2-E-A200-5206 DSHG-06-3C60-C2-E-T-A240-N1-50
DSPG-01-C-D24-10
调速阀：
FCG-01-4-11 FCG-02-30-N-30
压力控制阀：
HG-03-A2-22