Valve Packings
This sets of packing rings and in some instances intermediate and bull rings have been checked at renowned institutes for their ability to work according to TA-Luft (Technische Anleitung zur Reinhaltung der Luft) and are approved.
The tested leakage rates meet the VDI-Guidline 2440 with controlled leakage rates of 1.0 · 10-4 mbar · l/(s·m) up to 200 °C and 1.0 · 10-2 mbar · l/(s·m) up to 400 °C (test medium Helium) and are therefore recommended as (BAT) Best Available Technology an high grade sealing systems.
Main application:
Main application: Armatures, valves, gate valves, door and lid seals, as well as slow speed applications in mixers and filters.
Specifications
- Surface roughness: shaft: Ra max 0.5 μm, housing Ra max 5 μm
- Gap between shaft/housing or shaft/gland max 0.2 mm
- Precompression after installation: ca 50 MPa for short time
- Min. compression in service: ca 30 MPa
- For pressure above 40 bar and frequently varying temperature and presure we recommend to use of Live Loading Systems
TA Luft and ISO 15848 certified packings can also be supplied on spools. To be TA Luft conform each packing ring must be precompressed in the stuffing box or a similar device to the recommended TA Luft ring densities.
Valve packings should always be used as pre-pressed rings.
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Valve Packing
A 19 Spezial
A 19 Spezial packing has a very low coefficient of friction and therefore displays low stem/spindle frictions and seals reliably with lower gland forces. In applications with high pressure or vacuum, die formed bullrings of S4 are recommended, top and bottom, to prevent extrusion. The packing rings require minimal maintenance and readjustments. The packing is non-ageing and long lasting.
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Valve Packing
A 19OX Oxygen
A190X Oxygen has a low coefficient of friction and displays low stem/spindle frictions.The packing is non-ageing and has a long lifetime. In applications with high pressure or vacuum, die formed bullrings of S4 are recommended, top and bottom, to prevent extrusion. The packing rings require minimal maintenance and readjustments.
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Valve Packing
A 22 Graphostat
Yarn of highest puricity >99 % C content and universally chemical resistant. The addition of high temperature Graphite impregnation, increases the cross section density and works as a stable pressure cushion for the graphite fiber. A22 is flexible, resistant to wear and surface protecting. Excellent in temperature cycling, since graphite has a similar coefficient of expansion as steel. Also, excellent as bullrings for packing made of expanded graphite.
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Valve Packing
A 33 Carbostat
High temperature blocking agent increases the cross section density and acts as a form stable pressure bed for the Carbographite fiber; flexible, wear resistant and valve stem protecting; Perfect for temperature cycling as the coefficient of thermal expansion corresponds to that of steel; Excellent as a bullring in use with rings of expanded graphite
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Valve Packing
A 37 GraphoFlon
No slip stick effect; High cross section density; High temperature resistant to minimize emissions; Non hardening, good reset capability; Coefficient of thermal expansion similar to steel; Easy to cut, install and disassemble; Low coefficient of friction minimizes the adjustment force in valves; Recommended as die formed rings; For valve applications rings should be approx. 25 - 30% compressed at installation
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Valve Packing
A 44 Grapho
Universal use in pumps and valves; Very good dry-running characteristics; No wear, perfect thermal conductivity; High quality pure graphite; Coefficient of thermal expansion similar to steel; Rings should be approx. 20 - 25 % compressed during assembly; Recommended as die formed rings
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Valve Packing
A 44 I Grapho Extra
Universal use valve packing; Expanded graphite of higher quality; Coefficient of expansion similar to steel; For valve applications rings should be approx. 20 - 25 % compressed at installation; Precompressed rings are recommended
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Valve Packing
A 55 K
Universal plant wide use in static and rotating applications; Wear and extrusion stability through carbon fiber corner reinforcement; Non hardening, good reset capability, coefficient of thermal expansion corresponds to the coefficient of steel; High temperature resistance and excellent heat and electric conductivity; Self lubricating, excellent use in pumps, minimizing the need of flushwater; Easy to cut, assemble and disassemble; Low coefficient of friction minimizes the adjustment force in valves; No shaft wear, excellent dry running characteristics; Rings should be compressed in valve applications at assembly approx. 15 - 20 % in height; Die formed rings are recommended
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Valve Packing
A 66 Incograph HT
Universal plant wide use in static applications; Extrusion stability through ultrafine 10 myh Inconel mesh reinforcement on each strand; Non hardening, good reset capability, coefficient of thermal expansion corresponds to the coefficient of steel; High temperature and pressure resistance; Easy to cut, assemble and disassemble; Low coefficient of friction minimizes the adjustment force in valves; For valve applications rings should be approx. 25 - 30 % compressed at installation; A 66 can be used as bullrings for style A 44, A 44 I, P 60 and ARF ; Die formed rings are recommended
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Valve Packing
A 99 Spezialgraph
Universal plant wide use in static applications; Extrusion stability through ultrafine 10 myh Inconel mesh reinforcement on each strand; Non hardening, good reset capability, coefficient of thermal expansion corresponds to the coefficient of steel; High temperature and pressure resistance; Easy to cut, assemble and disassemble; Low coefficient of friction minimizes the adjustment force in valves; For valve applications rings should be approx. 25 - 30 % compressed at installation; A 99 can be used as bullrings for style A 44 I, P60 and ARF; Die formed rings are recommended; Contains effective passive corrosion inhibitor
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Pump packing
P 60 CarboGraph
Wear and extrusion stability through Carbon fiber reinforcement; Non hardening, good reset capability, coefficient of thermal expansion similar to steel; High temperature resistant and excellent heat and electric conductivity; Self lubricating, excellent use in pumps, minimizing the need for flushwater; Easy to cut, assemble and disassemble; No shaft wear, excellent dry running characteristics