Rotary Seals - Dilanda.it

Turcon ® Roto Variseal ®
Table LXV Standard Turcon ® materials for Roto Variseal ®
Material,
Applications,
Properties
Code
Spring
material
Code
Operating temp.
°C
Mating surface
material
MPa
max.
Turcon ® T40
For all lubricating and non-lubricating
hydraulic fluids, water hydraulics, soft mating
surfaces
Carbon fibre filled
Colour: Grey
T40
Spring material
AISI 301
S -100 to +260
Steel
Steel, chromeplated
Cast iron
Stainless steel,
Aluminium
Bronze
Alloys
15
Turcon ® T78
For all lubricated and non-lubricated
applications, soft mating surfaces.
Aromatic polymer
Colour: Tan to dark brown
T78
Spring material
AISI 301
S -100 to +260
Steel
Steel, chromeplated
Cast iron
Stainless steel
5
n Highlighted materials are standard.
Busak+Shamban recommends that the following surface
finishes be observed :
Table LXVI
Surface roughness
Recommended maximum surface roughness μm
Media Shaft surface 1) Static groove surface
Cryogenic and low molecular gases
Hydrogen, Helium, Freon, Oxygen
Nitrogen
Low viscosity fluids
Water, Alcohols, Hydrazine, Gaseous
nitrogen, Natural gas, Skydrol, air
High viscosity fluids
Hydraulic oils, Crude oil, Gear oil,
Sealants, Glue, Milkproducts
R max = 1.0 μm
R z = 0.63 μm
R a = 0.1 μm
R max = 2.5 μm
R z = 1.6 μm
R a = 0.2 μm
R max = 2.5 μm
R z = 1.6 μm
R a = 0.2 μm
R max = 3.5 μm
R z = 2.2 μm
R a = 0.3 μm
R max = 5.0 μm
R z = 3.5 μm
R a = 0.6 μm
R max = 6.5 μm
R z = 5.0 μm
R a = 0.8 μm
1) The sealing surface must be free from spiral grooves.
The material contact area R mr should be approx. 50 to 70%, determined at a cut depth c = 0.25 x R z , relative to a reference line of C ref . 5%.
208
Latest information available at www.busakshamban.com
Edition April 2006