Datasheet

© Freudenberg Simrit GmbH & Co. KG | Technical Manual 2007590
Products I ISC O-Rings and Static Seals
Merkel Cover Seal PU 83
TPU profile ring
Merkel Cover Seal PU 83
Product description
Single-piece, double-acting Merkel compact seal made
from low temperature polyurethane for static sealing,
outer sealing.
Product advantages
Interchangeable for O-ring housings and O-ring
with back-up ring
High reliability
Simple and secure installation
Simplified stockkeeping
Gas-proof height.
Application
Higher operating pressure (up to 60 MPa)
Gap for breathing (pipe expansion)
Short rate of increase of the pressure
(end position damping)
Alternating in situ operating pressure
Nominal diameter up to 2000 mm.
Presses, steel industry, wind power plants, cranes,
construction machinery, industrial vehicles, forestry
equipment, injection moulding machines.
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Material
Material Code
Polyurethane 95 AU V142/94 AU 925
Operating conditions
Material 95 V142/94 AU 925
Temperature range in °C
Hydraulic oils HL, HLP –30 … +110
HFA fluids +5 … +50
HFB fluids +5 … +50
HFC fluids –30 … +40
HFD fluids –
Water +5 … +40
HETG (rapeseed oil) –30 … +60
HEES (synthetic esters) –30 … +80
HEPG (glycol) –30 … +50
Mineral greases –30 … +110
Pressure p in MPa 60
The specified values are maximum values and must not be applied
simultaneously.
Surface quality
Surface
roughness
R
a
R
max
Sliding surface 0,8 µm 3,2 µm
Groove base 1,6 µm 6,3 µm
Groove flanks 6,3 µm 20,0 µm
Lead-in chamfer* 0,8 µm 3,2 µm
* burr-free transition