Double Acting Piston Seal For Static And Dynamic Applications K 35-P

A versatile double acting piston seal for static and dynamic applications

The single-piece piston seal K 35-P is a double acting compact seal for a wide range of static and dynamic applications. 

The seal profile is optimized for polyurethane materi-als, which  leads in combination with the compact seal geometry to a high pressure resistance and long service time. 

Years of experience in dynamic and static sealing solutions in connection with the use of modern Finite Element Programs (FEA) for non-linear material behaviour resulted in the profile K 35-P with its excellent sealing characteristics for all pressure ran-ges.

 

Due to the slightly increased radial preload of the cross section, no activating pressure is needed for low pressure ranges to obtain a compact sealing behaviour as it is the case for standard lipseals. At higher pressure the deformation of the seal cross section generates a contact pressure distribution in the area of the sealing gap which leads to an excell-lent dynamic sealing performance also at increased speeds. 

On the other hand, the risk of gap extrusion is mini-mised by the geometry and material and therefore additional back-up rings are not needed.

• simple, single-piece geometry

• double acting pressurisation

• high pressure load up to 400 bar

• no twisting and tilting of the profile

• adaptable for almost all existing housings

• high tightness at low pressure

• suitable for vacuum applications

• minimised gap extrusion, no additional back-up rings

• long service life

• smooth surface – suitable for sterilisation in the food industry

• compensation of production tolerances

• diameter range from 4 to 4.000 mm

• easy to install (less parts)

The cross-section of the K 35-P is adaptable for almost all existing housing dimensions. For new housing designs, a ratio CS / L of 1:1,35 is recommended. 

Normally these seals may be snapped into closed grooves. For extreme ratios of diameter to cross section open grooves, the use of special assembly tools may be requi-red. Proposals for the design of such tools will be provided on request.

The profile geometry is optimized for polyurethanes. For special working conditions such as high temperature and aggressive media which cannot be met with polyurethane, many standard and special elastomeric materials are also available. 

Profile K 35-P is an optimized alternative to conven-tional O-rings. The stable design minimises the risk of twisting during installation and at dynamic applica-tions. For this purpose the seal is also available with an inside (S 35-P) or a lateral (R 35-P) sealing edge.

The double acting piston seal K 35-P can be used for many applications, as per example:

• oil- and water hydraulics

• pneumatics (modificated design)

• static sealing applications

• O-ring replacement

(particularly for dynamic use)

• food industry

• valve shaft seal or spools

• discharge piston seal