Piston seals

A piston seal separates the cylinder chambers and holds pressure from both sides. Unlike a rod seal, it sits in a closed groove with no external lubrication. Below are 787 Hansa Flex sizes: DBM, DAS, DPS, EGR, RSE and other series, from compact single-acting to double-acting heavy-duty designs.

Complete size range — 787

The table lists 787 sizes. Start typing a part number or size to filter the list.

787
Part number
D11W 150 100
D11W 200 137
D11W 248 185
D11W 250 187
D11W 295 220
D11W 300 225
D11W 325 250
D11W 354 275-1
D11W 400 325
D11W 413 314
D11W 425 350
D11W 433 334
D11W 433 354
D11W 452 354
D11W 492 393
D11W 492 413
D11W 500 400
D11W 550 450
D11W 551 472
D11W 590 472
D11W 629 511
D11W 650 550
D11W 708 590
D11W 748 629
D11W 787 669
D11W 980 47
CH3-030
CH3-032
CH3-040
CH3-045
CH3-050
CH3-055
CH3-060
CH3-063
CH3-065
CH3-070
CH3-080
CH3-090
CH3-100
CH3-100 FPM-C
CH3-110
CH3-115
CH3-125
CH3-140
CH3-140 FPM-C
CH3-150
CH3-160
CH3-180
CH3-200
CH3-225
CH3-250
CH3-300
DAS 30 17
DAS 40 24
DAS 40 30
DAS 50 34
DAS 60 44
DAS 63 47
DAS 70 50
DAS 80 60
DAS 90 70
DAS 100 75
DAS 110 85
DAS 125 100
DAS 130 105
DAS 140 115
DAS 150 125
DAS 160 135
DAS 180 155
DAS 200 175
DAS 220 195
DBM 078 043-M
DBM 086 051-M
DBM 098 059
DBM 098 059-1
DBM 098 059-2
DBM 098 063-M
DBM 098 066-SI
DBM 110 074-M
DBM 118 083-M
DBM 125 086
DBM 125 086-ISO
DBM 125 086-M
DBM 125 094-ISO
DBM 125 094-SI
DBM 137 098
DBM 137 098-M
DBM 137 106-SI
DBM 157 102-M
DBM 157 118 FPM
DBM 157 118-1
DBM 157 118-2
DBM 157 118-NEO
DBM 157 125-ISO
DBM 157 125-SI
DBM 165 110-M
DBM 175 112
DBM 177 114
DBM 177 122-M
DBM 177 137
DBM 196 133 FPM
DBM 196 133-M
DBM 196 137-ISO
DBM 196 149-SI
DBM 196 157-ISO
DBM 200 137
DBM 200 162
DBM 212 150
DBM 216 153
DBM 216 153-M
DBM 216 177-ISO
DBM 220 157-M
DBM 236 173 FPM
DBM 236 173-M
DBM 236 173-NEO
DBM 236 188-SI
DBM 237 175
DBM 248 185 FPM
DBM 248 185-2
DBM 248 185-M
DBM 248 188-ISO
DBM 248 188ISO
DBM 248 201-SI
DBM 248 208-ISO
DBM 250 187
DBM 250 212
DBM 255 192-M
DBM 255 196
DBM 262 200
DBM 275 196 FPM
DBM 275 212-M
DBM 275 216-ISO
DBM 275 228-SI
DBM 295 216
DBM 295 232-M
DBM 300 225
DBM 314 236 FPM
DBM 314 236-ISO
DBM 314 236-NEO
DBM 314 244-M
DBM 314 255-ISO
DBM 314 259-SI
DBM 334 255
DBM 350 275
DBM 354 283-M
DBM 354 295-ISO
DBM 354 299-SI
DBM 374 295
DBM 393 295 FPM
DBM 393 314
DBM 393 314-ISO
DBM 393 332-M
DBM 393 334-ISO
DBM 393 339-SI
DBM 400 325
DBM 413 314
DBM 433 334-1
DBM 433 362-M
DBM 433 374-ISO
DBM 433 378-SI
DBM 452 354
DBM 452 381-M
DBM 472 417-SI
DBM 492 393-ISO
DBM 492 405-M
DBM 492 413
DBM 492 413-ISO
DBM 492 425-SI
DBM 511 413-1
DBM 523 452
DBM 531 433
DBM 531 433-1
DBM 551 452-1
DBM 551 464-M
DBM 551 472-ISO
DBM 551 484-SI
DBM 570 472
DBM 570 472-1
DBM 590 492-1
DBM 590 503-M
DBM 590 523-SI
DBM 600 500
DBM 610 511
DBM 610 511-1
DBM 629 511
DBM 629 511-1
DBM 629 531-ISO
DBM 629 543-M
DBM 629 551-ISO
DBM 629 563-SI
DBM 649 551
DBM 669 570
DBM 669 582-M
DBM 688 590
DBM 708 590-1
DBM 708 621-M
DBM 728 629
DBM 748 649
DBM 767 669
DBM 787 669-1
DBM 787 669-ISO
DBM 787 688-M
DBM 787 708-SI
DBM 826 728
DBM 866 748
DBM 905 807
DBM 944 846
DBM 984 866
DBM 984 886
DDE 50
DDE 62
DDE 75
DDE 100
DDE 106
DDE 112
DDE 125
DDE 137
DDE 143
DDE 150
DDE 156
DDE 162
DDE 175
DDE 200
DDE 250
DDE 300
DDE 312
DDE 387
DDE 400
DDE 437
DDE 150100
DDE 175112
DDE 212150
DDE 300225
DDEM 00 180-P
DDEM 000 88-P
DDEM 12 06
DDEM 16 10
DDEM 20 12
DDEM 20 14-P
DDEM 25 110-P
DDEM 25 17
DDEM 25 17-P
DDEM 32 24
DDEM 32 24-P
DDEM 40 30
DDEM 40 30-P
DDEM 50 40
DDEM 50 40-P
DDEM 55 45
DDEM 55 45-P
DDEM 60 145-P
DDEM 60 50
DDEM 60 50-P
DDEM 63 53
DDEM 63 53-P
DDEM 65 55
DDEM 65 55-P
DDEM 70 58
DDEM 70 58-P
DDEM 75 63
DDEM 75 63-P
DDEM 80 160-P
DDEM 80 68
DDEM 80 68-P
DDEM 85 73
DDEM 85 73-P
DDEM 90 78
DDEM 90 78-P
DDEM 100 088
DDEM 100 95-P
DDEM 105 093
DDEM 110 098
DDEM 120 105
DDEM 125 110
DDEM 140 125
DDEM 150 135
DDEM 160 145
DDEM 180 160
DDEM 200 180
DDEM 201 05-P
DPC 40 24
DPC 45 29
DPC 50 34
DPC 55 39
DPC 60 44
DPC 65 50
DPC 70 50
DPC 75 55
DPC 80 60
DPC 85 65
DPC 85 65-NEO
DPC 90 70
DPC 90 70-NEO
DPC 95 75
DPC 100 75
DPC 100 80
DPC 100 80-NEO
DPC 105 85
DPC 110 85
DPC 120 100
DPC 120 100-NEO
DPC 140 115
DPC 150 125
DPS 25 17-1
DPS 30 22-SI
DPS 32 24
DPS 32 24 FPM
DPS 32 24-1
DPS 32 24-1 FPM
DPS 32 24-SI
DPS 35 27
DPS 35 27-SI
DPS 40 32
DPS 40 32-1
DPS 45 37
DPS 45 37-SI
DPS 50 38
DPS 50 38 FPM
DPS 50 40-1
DPS 50 40-1 FPM
DPS 60 48
DPS 60 48 FPM
DPS 63 51
DPS 63 51 FPM
DPS 63 53-1
DPS 65 53
DPS 70 58
DPS 75 63
DPS 80 65-1
DPS 80 66
DPS 80 66 FPM
DPS 85 71
DPS 90 76
DPS 100 85-1
DPS 100 86
DPS 100 86 FPM
DPS 110 96
DPS 120 106
DPS 125 105-1
DPS 125 108
DPS 125 108 FPM
DPS 140 120-1
DPS 140 123
DPS 140 123 FPM
DPS 160 140-1
DPS 160 143
DPS 180 163
DPS 200 170-1
DPS 200 180
DPS 220 200
DPS 250 230
DS 118 11062
DS 157 098
DS 157 098-M
DS 196 137
DS 196 137-M
DS 216 157
DS 216 1571
DS 220 157-NEO
DS 236 177-M
DS 248 188-M
DS 248 188-NEO
DS 255 177
DS 255 177-NEO
DS 275 196
DS 275 196-NEO
DS 314 236
DS 314 236-NEO
DS 314 236M
DS 334 255-NEO
DS 334 275-NEO
DS 354 275
DS 354 275-NEO
DS 374 295
DS 374 295-NEO
DS 393 314-M
DS 393 314-NEO
DS 393 3141-NEO
DS 413 334-NEO
DS 433 354-M
DS 433 354-NEO
DS 452 354-M
DS 452 374-M
DS 452 374-NEO
DS 472 393-NEO
DS 480 401-NEO
DS 492 393-M
DS 492 393-NEO
DS 511 413-NEO
DS 531 433-NEO
DS 551 452-M
DS 551 452-NEO
DS 590 472-M
DS 590 472-NEO
DS 590 492
DS 629 511-M
DS 629 511-NEO
DS 708 590-M
DS 787 669
DS 886 767
DS 940 47
DS 980 51
DS 984 866
DSM 102 4925-1A
DSM 110 21004-1A
DSM 216 157-1A
DSM 236 173-1A
DSM 255 192-1A
DSM 275 196-1A
DSM 295 216-1A
DSM 314 236-1A
DSM 314 251-1A
DSM 334 255-1A
DSM 354 275-1A
DSM 374 295-1A
DSM 393 314-1A
DSM 413 334-1A
DSM 433 354-1A
DSM 472 393-1A
DSM 492 393-1A
DSM 500 400-1A
DSM 511 413-1A
DSM 551 452-1A
DSM 551 472-1A
DSM 590 492-1A
DSM 629 531-1A
DSM 669 551-1A
DSM 708 610-1A
DSM 787 688-1A
DSM 826 728-1A
DSM 866 767-1A
EGR 0080 A554470
EGR 0100 A554470
EGR 0120 A554470
EGR 0150 A554470
EGR 0160 A554470
EGR 0200 A554470
EGR 0220 A554470
EGR 0240 A554470
EGR 0250 A554470
EGR 0280 A554470
EGR 0300 A554470
EGR 0320 A554470
EGR 0350 A554470
EGR 0360 A554470
EGR 0380 A554470
EGR 0400 A554470
EGR 0420 A554470
EGR 0440 A554470
EGR 0450 A554470
EGR 0480 A554470
EGR 0500 A554470
EGR 0520 A554470
EGR 0550 A554470
EGR 0560 A554470
EGR 0600 A554470
EGR 0600 B554470
EGR 0630 A554470
EGR 0650 A554470
EGR 0700 A554470
EGR 0750 A554470
EGR 0800 A554470
EGR 0850 A554470
EGR 0900 A554470
EGR 0950 A554470
EGR 1000 A554470
EGR 1050 A554470
EGR 1100 A554470
EGR 1150 A554470
EGR 1200 A554470
EGR 1250 A554470
EGR 1300 A554470
EGR 1350 A554470
EGR 1400 A554470
EGR 1450 A554470
EGR 1500 A554470
EGR 1550 A554470
EGR 1600 A554470
EGR 1650 A554470
EGR 1700 A554470
EGR 1800 A554470
EGR 1900 A554470
EGR 2000 A554470
EGR 2100 A554470
EGR 2200 A554470
EGR 2250 A554470
EGR 2300 A554470
EGR 2400 A554470
EGR 2500 A554470
EGR 2600 A554470
EGR 2700 A554470
EGR 2800 A554470
EGR 2900 A554470
EGR 3000 A554470
EGR 3200 A554470
EGR 3300 A554470
EGR 3500 A554470
EGR 3600 A554470
EGR 3700 A554470
EGR 3800 A554470
EGR 4000 A554470
EGR 4500 A554470
EGR 4800 A554470
EGR 5000 A554470
EGRP 0400 A554470
EGRP 0500 A554470
EGRP 0600 A554470
EGRP 0630 A554470
EGRP 0650 A554470
EGRP 0700 A554470
EGRP 0800 A554470
EGRP 0900 A554470
EGRP 1000 A554470
EGRP 1100 A554470
EGRP 1200 A554470
EGRP 1250 A554470
EGRP 1300 A554470
EUD 32 24-P
EUD 40 32-P
EUD 50 40-P
EUD 60 48
EUD 63 51
EUD 63 53-P
EUD 70 58
EUD 80 66
EUD 80 70-P
EUD 100 86
EUD 110 96
EUD 125 108
GPK 90-1
GPK 100-1
GPK 110-1
GPK 120-1
GPK 125-1
GPK 130-1
GPK 140
GPK 150
GPK 160
GPK 180
GPK 190
GPK 200
GPP 16
GPP 25
GPP 63
GPS 25
GPS 25-1
GPS 30
GPS 32
GPS 32-1
GPS 35
GPS 35-1-LP
GPS 38-LP
GPS 40
GPS 40-1
GPS 40-2
GPS 45
GPS 45-1
GPS 49
GPS 50
GPS 50-1
GPS 55
GPS 55-1
GPS 60
GPS 60-1
GPS 63
GPS 63-1
GPS 65
GPS 65-1
GPS 70
GPS 70-1
GPS 75
GPS 75-1
GPS 80
GPS 80-1
GPS 85
GPS 90
GPS 100
GPS 105
GPS 110
GPS 120
GPS 125
GPS 130
GPS 130-1-LP
GPS 140
GPS 150
GPS 160
GPS 170
GPS 180
GPS 200
PHD 50 36
PHD 55 41
PHD 60 46
PHD 60 50
PHD 63 48
PHD 65 50
PHD 70 55
PHD 75 60
PHD 80 65
PHD 85 70
PHD 90 75
PHD 95 80
PHD 100 85
PHD 100 85-PU
PHD 105 90
PHD 110 95
PHD 110 95-PU
PHD 115 100
PHD 120 105
PHD 125 102
PHD 130 107
PHD 135 112
PHD 140 117
PHD 145 122
PHD 150 127
PHD 160 137
PHD 165 142
PHD 180 157
RSE 12 05
RSE 14 08
RSE 16 10
RSE 16 10-1
RSE 20 12
RSE 20 14
RSE 22 12
RSE 25 15
RSE 30 15
RSE 30 20
RSE 30 22
RSE 32 20-W
RSE 32 22
RSE 32 26
RSE 35 20
RSE 35 25
RSE 37 21
RSE 40 25
RSE 40 25-1
RSE 40 25-AE
RSE 40 25-W
RSE 40 26-W-AR
RSE 40 30
RSE 40 30-1
RSE 40 32
RSE 40 32-2
RSE 40 33
RSE 42 32
RSE 42 35
RSE 45 29
RSE 45 30
RSE 45 35-W
RSE 50 30
RSE 50 32
RSE 50 35
RSE 50 35-1
RSE 50 35-AE
RSE 50 40
RSE 50 40-1
RSE 50 42
RSE 50 42-1
RSE 50 42-2
RSE 51 41
RSE 55 40
RSE 60 40
RSE 60 40-1
RSE 60 40-W
RSE 60 45
RSE 60 45-AE
RSE 60 50
RSE 60 50-2
RSE 60 52
RSE 63 43
RSE 63 45
RSE 63 45-2
RSE 63 45-W-AR
RSE 63 48
RSE 63 48-1
RSE 63 48-AE
RSE 63 53
RSE 63 53-1
RSE 65 45
RSE 65 45-1
RSE 65 50
RSE 65 50-W
RSE 65 55
RSE 65 55-1
RSE 70 50
RSE 70 50-1
RSE 70 50-AE
RSE 70 50-W
RSE 70 55
RSE 70 55-1
RSE 70 60
RSE 70 60-1
RSE 70 60-2
RSE 70 62
RSE 72 58
RSE 75 50
RSE 75 55
RSE 75 65
RSE 75 65-2
RSE 75 65-4
RSE 80 60
RSE 80 60-1
RSE 80 60-AE
RSE 80 60-W1
RSE 80 65
RSE 80 70
RSE 80 70-1
RSE 80 72
RSE 85 65-2
RSE 90 70
RSE 90 70-1
RSE 90 70-AE
RSE 90 70-W1
RSE 90 75
RSE 90 80
RSE 90 80-1
RSE 90 80-2
RSE 100 80
RSE 100 80-1
RSE 100 80-2
RSE 100 80-AE
RSE 100 80-W
RSE 100 85
RSE 100 86
RSE 100 90
RSE 100 90-1
RSE 110 100
RSE 110 100-1
RSE 110 90
RSE 110 90-AE
RSE 110 95
RSE 115 100
RSE 115 105
RSE 120 100
RSE 120 100-1
RSE 125 100-AE
RSE 125 105
RSE 125 105-1
RSE 125 115
RSE 125 115-1
RSE 140 115-AE
RSE 140 120
RSE 140 120-AE
RSE 150 125
RSE 150 130
RSE 160 140
RSE 160 140-AE
RSE 180 160
RSE 200 170-AE
RSE 200 175-AE
RSE 280 250
TDO 26
TDO 30
TDO 35
TDO 40
TDO 45
TDO 50
TDO 55
TDO 60
TDO 63
TDO 70
TDO 080 FPM
TDO 80
TDO 100
TDO 100 FPM
TDO 110
TDO 115
TDO 125
TDO 140
TDO 150
TDO 200
TDO 250
TDO 300
TDOP 25
TDOP 32
TDOP 40
TDOP 50
TDOP 60
TDOP 063-1
TDOP 63
TDOP 65
TDOP 70
TDOP 80
TDOP 100
TDOP 125
TDOP 160
TDOP 200

How to select the size

Measure the cylinder bore and the groove width on the piston. Profile height is critical: too tall and it will not seat, too short and there is no preload.

For pressure in both directions you need a double-acting profile. Single-acting series will pass oil when pressure reverses.

Materials

The material is chosen by medium and temperature, not by price:

  • NBR — the standard for mineral oil, −30…+100 °C. Most common and least expensive.
  • FKM (Viton) — up to +200 °C, aggressive media, brake fluid. Three to five times the price of NBR.
  • PU (polyurethane) — high pressure and abrasion, but not above +80 °C.
  • PTFE — chemicals, very low friction, but poor under compression without support.
  • EPDM — water, steam, glycol-based brake fluid. Not compatible with oil.

Common fitting mistakes

Three mistakes that make a new seal leak within a day:

  1. Damaged lip during fitting. The seal is pushed over threads or splines without a sleeve — the lip is cut and you cannot see it.
  2. Measuring a worn part. The old ring has lost its shape, so the new size does not seat in the groove.
  3. No back-up ring. Above 160 bar the seal extrudes into the gap.

Frequently asked questions

How is a piston seal different from a rod seal?
By location and profile. A rod seal runs on the rod and faces outward; a piston seal sits in a closed groove inside the cylinder. They are never interchangeable.

Why does a cylinder sag under load?
Usually a worn piston seal: oil bypasses between chambers and speed drops. The second cause is scoring in the bore.

What is a double-acting seal?
A profile that holds pressure from both sides without being flipped. It is identified by two symmetrical sealing lips.

Piston seals separate the two chambers of a cylinder and must hold pressure in both directions. We supply compact seals, U-cups, V-rings, step seals and PTFE piston rings, all as genuine parts with the original material and hardness. Selection depends on the bore diameter, groove width and depth, pressure range and fluid; the profile code on the old seal is the reliable reference. Common materials are NBR for mineral oil, PU for high-pressure dynamic duty and PTFE for low-friction applications. If the code is unreadable, send a photo of the cross-section with dimensions. We confirm the exact seal and material within 24 hours.

Showing 33–48 of 787 results

Frequently Asked Questions

Do you supply genuine parts or Chinese equivalents?

Genuine parts are our main business. If you need a lower-cost option, we can also look for a Chinese-made equivalent with the same mounting dimensions and ratings.

What is the lead time?

It depends on the supplier. If the factory has stock or produces in China, we ship quickly. A factory order that must be manufactured or shipped from abroad takes longer. We confirm the exact date in your quote.

How do I place an order?

Send the part number, a photo of the nameplate, or the machine model. We confirm availability and price within 24 hours.

What are the payment and shipping terms?

EXW by default. 20-50% prepayment, balance before shipment. We can work with your freight forwarder.

What piston seal types do you supply?

Compact seals, U-cups, V-rings, step seals and PTFE piston rings.

How do I size a piston seal?

Match the bore diameter, groove width and the original profile code.

Are piston seals genuine?

Yes, genuine parts with the original material and hardness.

Seal type comparison

Seal typeCross-sectionPressure classTypical applications
O-ringCircularLow to mediumStatic sealing, light dynamic duty
Quad ringFour-lobedLow to mediumLow-pressure sealing, less tendency to roll
U-cupU-shapedMedium to highRod and piston sealing in cylinders
V-ring (chevron)V stackHighHeavy-duty cylinders
Wiper / scraperLip-Removing dirt and water from the rod

Material data follows published O-ring manufacturer catalogues (Parker, Trelleborg). Pressure class and efficiency are relative comparisons between types, not rated values for a specific part - always confirm against the datasheet of the exact model.

Need a price or an equivalent?

Send the part number or a photo — we will match it and reply within 24 hours.

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