Rod seal UNP2

Description

The UNP2 is an asymmetrical single-acting U-shaped seal with a secondary sealing lip and an additional support edge. Its geometry, with a tight fit on the outer diameter, is designed for cylinders with small housing dimensions. The secondary lip protects against the ingress of dirt and, together with the preload generated by the profile, provides good sealing at both high and low pressures.

Assembly

Fit in a closed, machined groove (or in axially open spaces up to 25 mm diameter). Chamfer and deburr the edges of the housing and of the rod, and clean the housing thoroughly before installation. Do not pull the seal over sharp edges, threads or keyways, using a mounting sleeve if necessary. Lubricate the rod before assembly.

Advantages

Materials

Made of polyurethane (PU) with a hardness of 92 to 95 Shore A, a material of high mechanical and abrasion resistance that offers excellent performance against hydraulic oils to DIN 51524 parts 1 to 3, mineral-based lubricating oils and greases, and HFA, HFB and HFC fire-resistant hydraulic fluids to VDMA 24317.

Technical data

NO.	Ød	ØD	b	B	C
U-6104 UNP2	6	10	4	4.5	3
U-8165.8 UNP2	8	16	5.8	6.3	4
U-10165 UNP2	10	16	5	6	3
U-10153.7 UNP2	10	15	3.7	4.2	3
U-12205.8 UNP2	12	20	5.8	6.3	4
U-12195.7 UNP2	12	19	5.7	6.2	3.5
U-14205.7 UNP2	14	20	5.7	6.2	3
U-16225 UNP2	16	22	5	6	3
U-1620.93.5 UNP2	16	20.9	3.5	4	3
U-18265.8 UNP2	18	26	5.8	6.3	4
U-18255 UNP2	18	25	5	6	3.5
U-20285.8 UNP2	20	28	5.8	6.3	4
U-20275.8 UNP2	20	27	5.8	6.8	3.5
U-22284.5 UNP2	22	28	4.5	5	3
U-22307 UNP2	22	30	7	8	4
U-22305.8 UNP2	22	30	5.8	6.3	4
U-24.5304.5 UNP2	24.5	30	4.5	5	3
U-25335.8 UNP2	25	33	5.8	6.3	4
U-25365 UNP2	25	36	5	6	4.5
U-28366 UNP2	28	36	6	7	4
U-28366.3 UNP2	28	36	6.3	7.3	4
U-28368 UNP2	28	36	8	9	4
U-2834.25 UNP2	28	34.2	5	6	3
U-28385.3 UNP2	28	38	5.3	6.3	4.5
U-30385.8 UNP2	30	38	5.8	6.3	4
U-30388 UNP2	30	38	8	9	4
U-304010 UNP2	30	40	10	11	4.5
U-30408 UNP2	30	40	8	9	4.5
U-30387 UNP2	30	38	7	8	4
U-30406.5 UNP2	30	40	6.5	7.5	4.5
U-31.7538.16.35 UNP2	31.75	38.1	6.35	7.35	3
U-32408 UNP2	32	40	8	9	4
U-32405.5 UNP2	32	40	5.5	6	4
U-32427 UNP2	32	42	7	8	4.5
U-32428 UNP2	32	42	8	9	4.5
U-32406 UNP2	32	40	6	7	4
U-324710 UNP2	32	47	10	11	5.5
U-32406.5 UNP2	32	40	6.5	7.5	4
U-35435.8 UNP2	35	43	5.8	6.3	4
U-35438 UNP2	35	43	8	9	4
U-35455.8 UNP2	35	45	5.8	6.3	4.5
U-354510 UNP2	35	45	10	11	4.5
U-35457 UNP2	35	45	7	8	4.5
U-36445.8 UNP2	36	44	5.8	6.3	4
U-36448 UNP2	36	44	8	9	4
U-38508.5 UNP2	38	50	8.5	9.5	5
U-40485.8 UNP2	40	48	5.8	6.3	4
U-40488 UNP2	40	48	8	9	4
U-40507 UNP2	40	50	7	8	4.5
U-405010 UNP2	40	50	10	11	4.5
U-42506 UNP2	42	50	6	7	4
U-42528 UNP2	42	52	8	9	4.5
U-44.4553.977.92 UNP2	44.45	53.97	7.92	8.92	4.5
U-45535.8 UNP2	45	53	5.8	6.3	4
U-45538 UNP2	45	53	8	9	4
U-45557 UNP2	45	55	7	8	4.5
U-45555.8 UNP2	45	55	5.8	6.3	4.5
U-455212 UNP2	45	52	12	13	3.5
U-455510 UNP2	45	55	10	11	4.5
U-46548 UNP2	46	54	8	9	4
U-50588 UNP2	50	58	8	9	4
U-50589 UNP2	50	58	9	10	4
U-506010 UNP2	50	60	10	11	4.5
U-50607 UNP2	50	60	7	8	4.5
U-507013.5 UNP2	50	70	13.5	14.5	6
U-50609 UNP2	50	60	9	10	4.5
U-55658 UNP2	55	65	8	9	4.5
U-55638 UNP2	55	63	8	9	4
U-556510 UNP2	55	65	10	11	4.5
U-56648 UNP2	56	64	8	9	4
U-56666.8 UNP2	56	66	6.8	7.8	4.5
U-60688 UNP2	60	68	8	9	4
U-607011.5 UNP2	60	70	11.5	12.5	4.5
U-60729 UNP2	60	72	9	10	5
U-607010 UNP2	60	70	10	11	4.5
U-60686 UNP2	60	68	6	7	4
U-60707.5 UNP2	60	70	7.5	8.5	4.5
U-61696 UNP2	61	69	6	7	4
U-63.573.029.52 UNP2	63.5	73.02	9.52	10.52	4.5
U-63718 UNP2	63	71	8	9	4
U-65738 UNP2	65	73	8	9	4
U-65779 UNP2	65	77	9	10	5
U-657512.5 UNP2	65	75	12.5	13.5	4.5
U-66.776.29.52 UNP2	66.7	76.2	9.52	10.52	4.5
U-70788 UNP2	70	78	8	9	4
U-70829 UNP2	70	82	9	10	5
U-708512 UNP2	70	85	12	13	5.5
U-708511.5 UNP2	70	85	11.5	12.5	5.5
U-70806.5 UNP2	70	80	6.5	7.5	4.5
U-75858 UNP2	75	85	8	9	4.5
U-75838 UNP2	75	83	8	9	4
U-75836 UNP2	75	83	6	7	4
U-758510 UNP2	75	85	10	11	4.5
U-76846 UNP2	76	84	6	7	4
U-788613 UNP2	78	86	13	14	4
U-80888 UNP2	80	88	8	9	4
U-809010 UNP2	80	90	10	11	4.5
U-809012 UNP2	80	90	12	13	4.5
U-80929 UNP2	80	92	9	10	5
U-808810 UNP2	80	88	10	11	4
U-808812 UNP2	80	88	12	13	4
U-80969.5 UNP2	80	96	9.5	10.5	5.5
U-85938 UNP2	85	93	8	9	4
U-859512 UNP2	85	95	12	13	4.5
U-87.597.38 UNP2	87.5	97.3	8	9	4.5
U-90988 UNP2	90	98	8	9	4
U-901029 UNP2	90	102	9	10	5
U-9010511.5 UNP2	90	105	11.5	12.5	5.5
U-9010010 UNP2	90	100	10	11	4.5
U-951038 UNP2	95	103	8	9	4
U-9710512 UNP2	97	105	12	13	4
U-10012015 UNP2	100	120	15	16	6
U-10010811.5 UNP2	100	108	11.5	12.5	4
U-10011512 UNP2	100	115	12	13	5.5
U-1051158 UNP2	105	115	8	9	4.5
U-1051138 UNP2	105	113	8	9	4
U-106.5116.38 UNP2	106.5	116.3	8	9	4.5
U-1081168 UNP2	108	116	8	9	4
U-11012511 UNP2	110	125	11	12	5.5
U-12012811.5 UNP2	120	128	11.5	12.5	4
U-125.5135.38 UNP2	125.5	135.3	8	9	4.5
U-12813611.5 UNP2	128	136	11.5	12.5	4
U-144.5154.38 UNP2	144.5	154.3	8	9	4.5
U-15816812 UNP2	158	168	12	13	4.5
U-1601708 UNP2	160	170	8	9	4.5
U-164.5174.38 UNP2	164.5	174.3	8	9	4.5
U-186.5196.38 UNP2	186.5	196.3	8	9	4.5
U-209.5219.38 UNP2	209.5	219.3	8	9	4.5

Technical drawing and installation parameters of the UNP2 rod seal

This technical diagram defines the essential dimensions and geometric variables for the correct selection and installation of the UNP2 seal. In it you will find the critical dimensions linked to the specification tables, such as the inner diameter (Ød), the outer diameter (ØD), the width of the seal profile (b), the housing width (B) and the length of the lead-in chamfer (C). Complying with these values ensures a tight fit on the outer diameter, optimises the work of the secondary lip and guarantees stable, long-lasting sealing at both high and low pressures.

Three-dimensional view and components of the UNP2 rod seal

This 3D illustration details the basic structure of the UNP2 U-seal. You will be able to see its key elements clearly: the polyurethane (PU) body, the symmetrical sealing lips and the additional sealing and support edge. Its compact design provides a tight fit on the outer diameter, while its secondary lip protects against the ingress of dirt and guarantees excellent performance at both high and low pressures.

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