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Inside Diameter

Outside Diameter

Height (H)

Uniring

The piston Uniring is a one-piece, double-acting piston seal made of two bonded materials: a hard,
wear-resistant dynamic sealing layer (Duro 60D) and a softer, resilient static sealing layer (Duro 57A)
that acts like a seal energizing spring for reliable sealing across a wide pressure range. This design
ensures reliable sealing across a wide pressure range, allows easy installation on one-piece pistons,
and replaces a variety of seal types (O-rings, O-rings with back-ups, T-seals, U-seals).

Product View

Technical Diagram

Available Materials

Material

Acronym

Temperature

Surface Speed

AUAU (56 found(s))-40ºF to +250ºF (-40ºC to +120ºC)<3 ft/s (0.9 m/s)

Ref. No.	∅d	∅D	H	Price
UNI12500750-187 ∅d 0.75 ∅D 1 H 0.187	0.750	1.000	0.187	Call for price
UNI12501000-187 ∅d 1 ∅D 1.25 H 0.187	1.000	1.250	0.187	Call for price
UNI12501250-187 ∅d 1.25 ∅D 1.5 H 0.187	1.250	1.500	0.187	Call for price
UNI12501500-187 ∅d 1.5 ∅D 1.75 H 0.187	1.500	1.750	0.187	Call for price
UNI12501750 ∅d 1.75 ∅D 2 H 0.125	1.750	2.000	0.125	Call for price
UNI12501750-250 ∅d 1.75 ∅D 2 H 0.25	1.750	2.000	0.250	Call for price
UNI18701125-250 ∅d 1.125 ∅D 1.5 H 0.25	1.125	1.500	0.250	Call for price
UNI18701375-250 ∅d 1.375 ∅D 1.75 H 0.25	1.375	1.750	0.250	Call for price
UNI18701625-125 ∅d 1.625 ∅D 2 H 0.125	1.625	2.000	0.125	Call for price
UNI18701625-250 ∅d 1.625 ∅D 2 H 0.25	1.625	2.000	0.250	Call for price
UNI18701625-312 ∅d 1.625 ∅D 2 H 0.312	1.625	2.000	0.312	Call for price
UNI18701625-375 ∅d 1.625 ∅D 2 H 0.375	1.625	2.000	0.375	Call for price
UNI18701875-265 ∅d 1.875 ∅D 2.25 H 0.265	1.875	2.250	0.265	Call for price
UNI18701875-312 ∅d 1.875 ∅D 2.25 H 0.312	1.875	2.250	0.312	Call for price
UNI18702125-312 ∅d 2.125 ∅D 2.5 H 0.312	2.125	2.500	0.312	Call for price
UNI18702125-375 ∅d 2.125 ∅D 2.5 H 0.375	2.125	2.500	0.375	Call for price
UNI18702375-250 ∅d 2.375 ∅D 2.75 H 0.25	2.375	2.750	0.250	Call for price
UNI18702375-312 ∅d 2.375 ∅D 2.75 H 0.312	2.375	2.750	0.312	Call for price
UNI18702625-312 ∅d 2.625 ∅D 3 H 0.312	2.625	3.000	0.312	Call for price
UNI18702625-375 ∅d 2.625 ∅D 3 H 0.375	2.625	3.000	0.375	Call for price
UNI18702875-312 ∅d 2.875 ∅D 3.25 H 0.312	2.875	3.250	0.312	Call for price
UNI18702875-375 ∅d 2.875 ∅D 3.25 H 0.375	2.875	3.250	0.375	Call for price
UNI18703125-312 ∅d 3.125 ∅D 3.5 H 0.312	3.125	3.500	0.312	Call for price
UNI18703125-375 ∅d 3.125 ∅D 3.5 H 0.375	3.125	3.500	0.375	Call for price
UNI18703625-375 ∅d 3.625 ∅D 4 H 0.375	3.625	4.000	0.375	Call for price
UNI18704625-265 ∅d 4.625 ∅D 5 H 0.265	4.625	5.000	0.265	Call for price
UNI25001000-375 ∅d 1 ∅D 1.5 H 0.375	1.000	1.500	0.375	Call for price
UNI25001500-375 ∅d 1.5 ∅D 2 H 0.375	1.500	2.000	0.375	Call for price
UNI25001750-375 ∅d 1.75 ∅D 2.25 H 0.375	1.750	2.250	0.375	Call for price
UNI25002000-312 ∅d 2 ∅D 2.5 H 0.312	2.000	2.500	0.312	Call for price
UNI25002000-375 ∅d 2 ∅D 2.5 H 0.375	2.000	2.500	0.375	Call for price
UNI25002125-375 ∅d 2.125 ∅D 2.625 H 0.375	2.125	2.625	0.375	Call for price
UNI25002250-375 ∅d 2.25 ∅D 2.75 H 0.375	2.250	2.750	0.375	Call for price
UNI25002500-250 ∅d 2.5 ∅D 3 H 0.25	2.500	3.000	0.250	Call for price
UNI25002500-375 ∅d 2.5 ∅D 3 H 0.375	2.500	3.000	0.375	Call for price
UNI25002750-375 ∅d 2.75 ∅D 3.25 H 0.375	2.750	3.250	0.375	Call for price
UNI25003000-375 ∅d 3 ∅D 3.5 H 0.375	3.000	3.500	0.375	Call for price
UNI25003500-375 ∅d 3.5 ∅D 4 H 0.375	3.500	4.000	0.375	Call for price
UNI25004000-375 ∅d 4 ∅D 4.5 H 0.375	4.000	4.500	0.375	Call for price
UNI25004500-375 ∅d 4.5 ∅D 5 H 0.375	4.500	5.000	0.375	Call for price
UNI25005000-562 ∅d 5 ∅D 5.5 H 0.562	5.000	5.500	0.562	Call for price
UNI25005500-312 ∅d 5.5 ∅D 6 H 0.312	5.500	6.000	0.312	Call for price
UNI25005500-375 ∅d 5.5 ∅D 6 H 0.375	5.500	6.000	0.375	Call for price
UNI25005500-562 ∅d 5.5 ∅D 6 H 0.562	5.500	6.000	0.562	Call for price
UNI25006000-562 ∅d 6 ∅D 6.5 H 0.562	6.000	6.500	0.562	Call for price
UNI25104802-228 ∅d 4.3 ∅D 4.802 H 0.228	4.300	4.802	0.228	Call for price
UNI26103500-375 ∅d 3.5 ∅D 4.022 H 0.375	3.500	4.022	0.375	Call for price
UNI28102437-170 ∅d 2.437 ∅D 3 H 0.17	2.437	3.000	0.170	Call for price
UNI31202125-250 ∅d 2.125 ∅D 2.75 H 0.25	2.125	2.750	0.250	Call for price
UNI31204375-500 ∅d 4.375 ∅D 5 H 0.5	4.375	5.000	0.500	Call for price
UNI31205375-500 ∅d 5.375 ∅D 6 H 0.5	5.375	6.000	0.500	Call for price
UNI37502250-187 ∅d 2.25 ∅D 3 H 0.187	2.250	3.000	0.187	Call for price
UNI37502250-250 ∅d 2.25 ∅D 3 H 0.25	2.250	3.000	0.250	Call for price
UNI37507250 ∅d 7.25 ∅D 8 H 0.375	7.250	8.000	0.375	Call for price
UNI37507500 ∅d 7.5 ∅D 8.25 H 0.375	7.500	8.250	0.375	Call for price
UNI37511000 ∅d 11 ∅D 11.75 H 0.375	11.000	11.750	0.375	Call for price

AU - AU (56 found(s))

Ref. No.	∅d	∅D	H	Price
UNI12500750-187 ∅d 0.75 ∅D 1 H 0.187	0.750	1.000	0.187	Call for price
UNI12501000-187 ∅d 1 ∅D 1.25 H 0.187	1.000	1.250	0.187	Call for price
UNI12501250-187 ∅d 1.25 ∅D 1.5 H 0.187	1.250	1.500	0.187	Call for price
UNI12501500-187 ∅d 1.5 ∅D 1.75 H 0.187	1.500	1.750	0.187	Call for price
UNI12501750 ∅d 1.75 ∅D 2 H 0.125	1.750	2.000	0.125	Call for price
UNI12501750-250 ∅d 1.75 ∅D 2 H 0.25	1.750	2.000	0.250	Call for price
UNI18701125-250 ∅d 1.125 ∅D 1.5 H 0.25	1.125	1.500	0.250	Call for price
UNI18701375-250 ∅d 1.375 ∅D 1.75 H 0.25	1.375	1.750	0.250	Call for price
UNI18701625-125 ∅d 1.625 ∅D 2 H 0.125	1.625	2.000	0.125	Call for price
UNI18701625-250 ∅d 1.625 ∅D 2 H 0.25	1.625	2.000	0.250	Call for price
UNI18701625-312 ∅d 1.625 ∅D 2 H 0.312	1.625	2.000	0.312	Call for price
UNI18701625-375 ∅d 1.625 ∅D 2 H 0.375	1.625	2.000	0.375	Call for price
UNI18701875-265 ∅d 1.875 ∅D 2.25 H 0.265	1.875	2.250	0.265	Call for price
UNI18701875-312 ∅d 1.875 ∅D 2.25 H 0.312	1.875	2.250	0.312	Call for price
UNI18702125-312 ∅d 2.125 ∅D 2.5 H 0.312	2.125	2.500	0.312	Call for price
UNI18702125-375 ∅d 2.125 ∅D 2.5 H 0.375	2.125	2.500	0.375	Call for price
UNI18702375-250 ∅d 2.375 ∅D 2.75 H 0.25	2.375	2.750	0.250	Call for price
UNI18702375-312 ∅d 2.375 ∅D 2.75 H 0.312	2.375	2.750	0.312	Call for price
UNI18702625-312 ∅d 2.625 ∅D 3 H 0.312	2.625	3.000	0.312	Call for price
UNI18702625-375 ∅d 2.625 ∅D 3 H 0.375	2.625	3.000	0.375	Call for price
UNI18702875-312 ∅d 2.875 ∅D 3.25 H 0.312	2.875	3.250	0.312	Call for price
UNI18702875-375 ∅d 2.875 ∅D 3.25 H 0.375	2.875	3.250	0.375	Call for price
UNI18703125-312 ∅d 3.125 ∅D 3.5 H 0.312	3.125	3.500	0.312	Call for price
UNI18703125-375 ∅d 3.125 ∅D 3.5 H 0.375	3.125	3.500	0.375	Call for price
UNI18703625-375 ∅d 3.625 ∅D 4 H 0.375	3.625	4.000	0.375	Call for price
UNI18704625-265 ∅d 4.625 ∅D 5 H 0.265	4.625	5.000	0.265	Call for price
UNI25001000-375 ∅d 1 ∅D 1.5 H 0.375	1.000	1.500	0.375	Call for price
UNI25001500-375 ∅d 1.5 ∅D 2 H 0.375	1.500	2.000	0.375	Call for price
UNI25001750-375 ∅d 1.75 ∅D 2.25 H 0.375	1.750	2.250	0.375	Call for price
UNI25002000-312 ∅d 2 ∅D 2.5 H 0.312	2.000	2.500	0.312	Call for price
UNI25002000-375 ∅d 2 ∅D 2.5 H 0.375	2.000	2.500	0.375	Call for price
UNI25002125-375 ∅d 2.125 ∅D 2.625 H 0.375	2.125	2.625	0.375	Call for price
UNI25002250-375 ∅d 2.25 ∅D 2.75 H 0.375	2.250	2.750	0.375	Call for price
UNI25002500-250 ∅d 2.5 ∅D 3 H 0.25	2.500	3.000	0.250	Call for price
UNI25002500-375 ∅d 2.5 ∅D 3 H 0.375	2.500	3.000	0.375	Call for price
UNI25002750-375 ∅d 2.75 ∅D 3.25 H 0.375	2.750	3.250	0.375	Call for price
UNI25003000-375 ∅d 3 ∅D 3.5 H 0.375	3.000	3.500	0.375	Call for price
UNI25003500-375 ∅d 3.5 ∅D 4 H 0.375	3.500	4.000	0.375	Call for price
UNI25004000-375 ∅d 4 ∅D 4.5 H 0.375	4.000	4.500	0.375	Call for price
UNI25004500-375 ∅d 4.5 ∅D 5 H 0.375	4.500	5.000	0.375	Call for price
UNI25005000-562 ∅d 5 ∅D 5.5 H 0.562	5.000	5.500	0.562	Call for price
UNI25005500-312 ∅d 5.5 ∅D 6 H 0.312	5.500	6.000	0.312	Call for price
UNI25005500-375 ∅d 5.5 ∅D 6 H 0.375	5.500	6.000	0.375	Call for price
UNI25005500-562 ∅d 5.5 ∅D 6 H 0.562	5.500	6.000	0.562	Call for price
UNI25006000-562 ∅d 6 ∅D 6.5 H 0.562	6.000	6.500	0.562	Call for price
UNI25104802-228 ∅d 4.3 ∅D 4.802 H 0.228	4.300	4.802	0.228	Call for price
UNI26103500-375 ∅d 3.5 ∅D 4.022 H 0.375	3.500	4.022	0.375	Call for price
UNI28102437-170 ∅d 2.437 ∅D 3 H 0.17	2.437	3.000	0.170	Call for price
UNI31202125-250 ∅d 2.125 ∅D 2.75 H 0.25	2.125	2.750	0.250	Call for price
UNI31204375-500 ∅d 4.375 ∅D 5 H 0.5	4.375	5.000	0.500	Call for price
UNI31205375-500 ∅d 5.375 ∅D 6 H 0.5	5.375	6.000	0.500	Call for price
UNI37502250-187 ∅d 2.25 ∅D 3 H 0.187	2.250	3.000	0.187	Call for price
UNI37502250-250 ∅d 2.25 ∅D 3 H 0.25	2.250	3.000	0.250	Call for price
UNI37507250 ∅d 7.25 ∅D 8 H 0.375	7.250	8.000	0.375	Call for price
UNI37507500 ∅d 7.5 ∅D 8.25 H 0.375	7.500	8.250	0.375	Call for price
UNI37511000 ∅d 11 ∅D 11.75 H 0.375	11.000	11.750	0.375	Call for price