Technical information

Contact Surfaces
  Dynamic contact
surface/rod		 Static groove base-
diameter/housing
Rz ≤ 1,0 μm ≤ 4,0 μm
Rmax ≤ 2,0 μm ≤ 10,0 μm
Design

Aufbau Pre-Loading by Axially Acting SpringBased on experience, the specific surface compression of both springs should be between 0.2 and 0.4 N/mm2. With the slightly stiffer type HN 7001 it may be necessary to increase preload to 0.8 N/mm2.

Fitting Instructions
  • Always install packings with sealing lips facing towards the pressure side
  • Spring is normally installed on the pressure side of the packing
  • In case of aggressive media and installation of the spring on the pressureless side, spring compression must be adapted to the maximum media pressure which might be generated
  • Prior to fitting, the installation space of the packing must be cleaned from dirt, swarf, etc.
  • Rod and housing bore must be provided with lead-in chamfers between 15° and 30° to avoid damaging the sealing edges