Operating range
Pressure
[pmax]:
|
800 bar |
| pH: | 0 - 14 |
Temperature: t = -200… +550 °C
Temperature in steam
Density 1.40 up to 1.80 g/cm3
Main application
- Fittings
- Pumps (high temperature)
- Covers
- Valves
Suitable for
- Valves and fittings of all Industries
Despite ARF rings are mainly designed for valves it also can be used in pumps at higher shaft speeds due to its high heat conductivity.
As this is a precision sealing element Stuffingbox needs to be in precise alignment and perfect surface condition.
Approvals
- Oxygen BAM 200 °C/250 bar
- DVGW and KTW
Variant
- Graphite in Purity 98 %
- Graphite in Purity 99,85 %
- expanded graphite APX 2 foil with integrated oxidation protection
- VDI 2440 / TA Luft with a leakage rate of 5.7 · 10-3 mbar · l/(s·m) 300 °C
- Rings with integrated reinforcement or endcaps made from AISI 316
Form of delivery
- Standard: Endless rings. As Option cut into half-shells or with skive cut.
- Rings with or without metal reinforcement
- Pressure seals in any kind of geometry
- Graphite tape in in 10, 15, 20 or 25 mm width,
corrugated, 0.38 mm thick mit density 1.1
0.5 or 1.0 mm thick with density 1.0 and self adhesive backing
ARF Ring
Pure expanded graphite ring
Characteristics
- High cross section density
- Self lubrication and limited wear
- Dry running capability
- Coefficient of thermal expansion similar to steel
- Maintenance free and elastic, also under variable pressure
- Non ageing, high chemical resistance
- Attention! Precise tolerances and surfaces of application are requested