What does a hydraulic piston seal do?

It seals the piston to the barrel so oil cannot bypass from one chamber to the other.

Rod seal or piston seal?

If oil is leaking along the chrome rod, start with the rod seal. If the cylinder drifts or feels weak with no external leak, the piston seal is the usual suspect.

How do I match a size?

Use ID, OD and H from the groove or the old part, then filter the series table. Send a sketch if the profile is unclear.

Hydraulic piston seals

2,077 parts in catalog

Technical table

Live column filters for code, category, ID, OD and H — same workflow as the store.

Find your size

Dimensions in mm. Enter one measurement or a full size such as 36x44x5.5.

Inner diameter · IDOuter diameter · ODHeight · HCode / SKUCategory / series

2,077 parts

Code (SKU)	Category	ID (d)	OD (D)	H (L)	Action
K03-020	K03	10	20	8.9	View
K03-022	K03	12	22	8.9	View
K03-025	K03	15	25	8.9	View
K03-028	K03	18	28	8.9	View
K03-030	K03	20	30	8.9	View
K03-032	K03	20	32	10.4	View
K03-035	K03	23	35	10.4	View
K03-036	K03	24	36	10.4	View
K03-040	K03	25	40	11	View
K03-042	K03	27	42	11	View
K03-045	K03	30	45	11	View
K03-050	K03	35	50	11	View
K03-055	K03	40	55	11	View
K03-056	K03	41	56	11	View
K03-060	K03	45	60	11	View
K03-063	K03	48	63	12.5	View
K03-070	K03	50	70	14.6	View
K03-080	K03	60	80	14.6	View
K03-090	K03	70	90	20.6	View
K03-100	K03	80	100	20.6	View
K03-110	K03	90	110	20.6	View
K03-115	K03	95	115	20.6	View
K03-125	K03	100	125	25	View
K03-140	K03	115	140	25	View
K03-150	K03	120	150	28	View
K03-160	K03	130	160	28	View
K03-180	K03	150	180	30.5	View
K03-200	K03	170	200	32.5	View
K03-250	K03	220	250	32.5	View
K03-275	K03	245	275	32.5	View
K03-280	K03	250	280	32.5	View
K03-300	K03	270	300	32.5	View
K15 015-007.5	K15	7.5	15	3.2	View
K15 016-008.5	K15	8.5	16	3.2	View
K15 020-012.5	K15	12.5	20	3.2	View
K15 022-014.5	K15	14.5	22	3.2	View
K15 025-014	K15	14	25	4.2	View
K15 025-017.5	K15	17.5	25	3.2	View
K15 030-022.5	K15	22.5	30	3.2	View
K15 032-021	K15	21	32	4.2	View
K15 032-024.5	K15	24.5	32	3.2	View
K15 035-027.5	K15	27.5	35	3.2	View
K15 038-030.5	K15	30.5	38	3.2	View
K15 040-024.5	K15	24.5	40	6.3	View
K15 040-029	K15	29	40	4.2	View
K15 040-032.5	K15	32.5	40	3.2	View
K15 045-029.5	K15	29.5	45	6.3	View
K15 045-034	K15	34	45	4.2	View
K15 048-037	K15	37	48	4.2	View
K15 049-038	K15	38	49	4.2	View

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Piston seals ride on the piston and separate the two oil chambers inside the barrel. They stop internal bypass so the cylinder can hold and move a load.

Each series page has a live ID, OD and H table. Filter those columns or search a measured size. We only show dimensions that exist on the product record.

How to specify

Inner diameter (ID, d)
Outer diameter (OD, D)
Section height (H, L)
Series code, or a photo or drawing if the profile is unknown

Hydraulic piston seals

Technical table

How to specify

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