Piston seal COR

Description

The COR profile is an elastomer pneumatic piston seal, commonly made of NBR, designed to provide effective sealing, low friction and good cylinder adaptability.

Assembly

Install the COR in a clean groove, free from sharp edges or damage. Lubricate lightly before assembly, avoid twisting the profile and periodically check wear, dirt or deformation to ensure proper sealing.

Advantages

Sealing profile for pneumatic pistons, suitable for static and dynamic functions.
Design focused on reducing friction during piston movement.
Good sealing performance against compressed air in pneumatic applications.
Commonly manufactured in NBR for general use.
Can be manufactured in other elastomers depending on fluid, temperature and working conditions.
Easy assembly in properly machined piston grooves.
Suitable for industrial pneumatic cylinders.
Versatile solution to adapt the material to customer requirements.

Materials

The COR can be manufactured in any elastomer according to the customer’s application, with NBR being the usual option for general pneumatic use and a typical hardness of 80-85 Shore A.

Technical data

NO	Ød	ØD	b	B	C	Ød1
U-16103 COR	10	16	3	3.5	4	15
U-24184 COR	18	24	4	4.5	4	23
U-25193.25 COR	19	25	3.25	3.75	4	24
U-32245.5 COR	24	32	5.5	6	5	30.5
U-40307 COR	30	40	7	7.5	6	38.5
U-423010 COR	30	42	10	11	6	40.5
U-50407 COR	40	50	7	7.5	6	48.5
U-50367 COR	36	50	7	7.5	6	48.5
U-60486.5 COR	48	60	6.5	7	6	58.5
U-63537 COR	53	63	7	7.5	6	61.5
U-80688.5 COR	68	80	8.5	9.5	6	78.5
U-100888.5 COR	88	100	8.5	9.5	6	98
U-12511010 COR	110	125	10	11	6.5	123
U-1251058.25 COR	105	125	8.25	9.25	8	123
U-16014014 COR	140	160	14	15	8	158
U-1601408.25 COR	140	160	8.25	9.25	8	158
U-16014510 COR	145	160	10	11	7	158
U-18016012 COR	160	180	12	13	8	178
U-20018014 COR	180	200	14	15	8	198
U-25022616 COR	226	250	16	17	8	248
U-25023014 COR	230	250	14	15	8	248
U-32029517 COR	295	320	17	18	11	317

Technical drawing and installation parameters of the COR piston seal

This technical drawing defines the dimensions and geometric variables that are essential for the correct selection and installation of the COR piston seal, a one-piece elastomer profile with asymmetrical sealing lips for pneumatic cylinders. It shows the critical dimensions linked to the size table, such as the inside diameter (Ød), the outside diameter (ØD), the profile width (b), the housing groove width (B) and the groove bottom diameter (Ød1), together with the housing dimension (C, shown as n on the drawing) and the 20° lead-in chamfer. The groove edges must be rounded and free from burrs. Complying with these dimensions ensures a correct seating of the profile, installation without twisting and stable sealing performance in diameters from 6 to 2000 mm.

Three-dimensional view and components of the COR piston seal

This 3D illustration shows the basic structure of the COR piston seal. It is a one-piece sealing element with asymmetrical sealing lips, usually manufactured in NBR with a hardness of 80 to 85 Shore A for general pneumatic use. The lip geometry reduces friction during piston movement and maintains uniform contact against the cylinder bore. The main advantage of this profile is its material versatility, as it can be manufactured in other elastomers depending on the fluid, the temperature and the working conditions of each application.

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