Rod seal UIP7

Description

The UIP7 is a single-acting, U-shaped hydraulic rod seal, optimised for low friction, with an interference fit on the outer diameter. Its cascading sealing edges are pressure-activated, significantly reducing static and dynamic friction in hydraulic cylinders and improving system efficiency. It is intended for mobile and stationary hydraulics with high demands regarding friction and sliding behaviour, with dimensions conforming to the ISO 5597 standard.

Assembly

Provide an axial clearance in the housing. Chamfer the edges and do not pull the seal over sharp edges during installation so as not to damage the lips. It can normally be snapped into closed grooves, and in restricted access locations a mounting tool may be required. Clean the installation space carefully before fitting.

Advantages

Materials

Made of polyurethane (PU) with a hardness of approximately 93 Shore A, a material with high wear resistance, low compression set and improved temperature resistance. It offers excellent performance against mineral-oil-based hydraulic oils and PAO fluids. Specific compounds are available for the special requirements of the chemical process industry and the food processing industry.

Technical data

NO.	Ød	ØD	b	B
U-20284.5 UIP7	20	28	4.5	5
U-22304.5 UIP7	22	30	4.5	5
U-25334.5 UIP7	25	33	4.5	5
U-28.536.55 UIP7	28.5	36.5	5
U-30385 UIP7	30	38	5
U-30405.7 UIP7	30	40	5.7	6.3
U-30.5395 UIP7	30.5	39	5
U-31385 UIP7	31	38	5
U-32416 UIP7	32	41	6
U-32425.7 UIP7	32	42	5.7	6.3
U-32.5415 UIP7	32.5	41	5
U-33405 UIP7	33	40	5
U-3341.56 UIP7	33	41.5	6
U-33.5405 UIP7	33.5	40	5
U-35446 UIP7	35	44	6
U-35446.4 UIP7	35	44	6.4
U-3544.76.5 UIP7	35	44.7	6.5
U-35455.7 UIP7	35	45	5.7	6.3
U-37475.7 UIP7	37	47	5.7	6.3
U-40505.7 UIP7	40	50	5.7	6.3
U-42526.5 UIP7	42	52	6.5
U-45555.7 UIP7	45	55	5.7	6.3
U-45577 UIP7	45	57	7
U-50605.7 UIP7	50	60	5.7	6.3
U-56666.5 UIP7	56	66	6.5	7
U-65757 UIP7	65	75	7	7.5

Technical drawing and installation parameters of the UIP7 rod seals

This technical drawing defines the essential dimensions and geometric variables for the correct housing and installation of the UIP7 rod seal, with dimensions conforming to the ISO 5597 standard. It specifies the critical dimensions linked to the data tables, including the seal width (b), the groove width (B), the rod diameter (Ød) and the housing bore diameter (ØD). It also details the maximum edge radii (R ≤ 0.2) and the extrusion gap (e), and provides for axial clearance in the housing. These values allow press fitting in a closed or split groove, prevent damage to the cascading lips during installation and guarantee low, constant friction throughout the service life of the seal.

Three-dimensional view and components of the UIP7 rod seals

This 3D illustration details the basic structure of the UIP7 single-acting rod seal for hydraulic applications. The drawing clearly shows its key elements and features: the polyurethane body with a U-profile optimised for low friction, the asymmetrical sealing lips and the cascading lips, which are activated by pressure. This configuration significantly reduces static and dynamic friction, prevents stick-slip even at low speed and after long standstills under pressure, and improves lubrication thanks to the fluid reservoir in the dynamic contact area.

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