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Description
A live-loaded system for the high integrity sealing of valves (and slow rotary equipment) in arduous conditions.
It comprises Supagraf® Moulded Rings of differing graphite construction located along the valve stem - to give even distribution of radial stress on the gland - with lubrication/anti-extrusion rings of tough Grafpak packing at each end.
Disc-spring stacks operate on the gland follower to provide live-loading action for self adjustment over long maintenance-free periods.
Typical applications
Inaccessible valves controlling hazardous media, especially valves subject to thermal/pressure cycling and vibration. Industries include chemical and hydrocarbon processing, oil and gas production, power generation, sewage treatment and nuclear.
Prime features
Chemical properties
Suitable for steam, water, condensate, oils, hot waxes, solvents, organic and inorganic acids, alkalis and most other chemicals in the range pH 0-14. Temperature limits apply to strong oxiding agents.
Service capabilities - valve stem duties
Maximum operating temperature (packings)
Steam and oxiding media: +550°C.
Minimum operating temperature (packings): -200°C.
Pressure range: High vacuum to 250bar.
Temperature ranges (disc springs)
Stainless steel: -150°C to +250°C.
Inconel: -200°C to +550°C.
How supplied
Each Valvemaster® set is custom-dresigned and manufactured to match precisely the physical dimensions and operating conditions of a specific valve. Full fitting instructions are included.
Click here to download the Compression Packing Guide pdf (2.17MB)
