Parker BU type rod seals

   BU type ULTRATHAN ® rod seal is a compact seal with retaining ring. This seal is mainly used in construction machinery cylinder seal system (see figure), as a buffer seal. In extreme conditions, the oil pressure is often up to 1000bar. BU type ULTRATHAN ® rod seal will be separated from the main seal with such a load. Because it has a special structure, which can be in a pressure seal is formed between the primary seal and the seal of the buffer passed back into the system. Such a seal may be used individually, or you can tandem configuration.

The main advantages:

● wear especially good.

● resistance to shock loads and pressure peaks

● anti-extrusion.

● compression deformation.

● can adapt to the most demanding working conditions.

● Easy to install.

● compliance with international standards ISO7425 / II and 5597 / I seal groove design.

1. Material:

P5008 is a Shore A hardness of about 93, a polyurethane-based material.

Collar material: Polyamide W5019

For special requirements (pressure, temperature, speed, used water, HFA solution, HFB and other liquid media), please

The Company's consulting services department, in order to recommend the appropriate materials and structures.

 
2. Application:

Working pressure: ≤500bar (pressure peaks up to 1000bar)

Operating temperature: -35 to + 110 ° C

Surface speed: ≤0.5m / s

Media: Hydraulic oil (mineral oil based)

Mainly used in mobile hydraulic cylinder seals.

 
3. Install:

  Such seals should be axial clearance (see Table H and L). To avoid damage to the sealing lip, the installation will not pull the seal sharp edges.

  Such seals generally can be loaded into closed groove. When the entrance is restricted to use special installation tools. If user requirements, the company will provide design of such tools, guidelines tolerance H8 / f7.