VR-3 / VR-31

VR-3 / VR-31

Vulcan Types VR3 and VR31 are braided packing, constructed from 100% Grafan yarns, to form truly exceptional capabilities and performance, pure Expanded Graphite packing. Type VR31 is additionally reinforced with Inconel wire to create the ideal packing for high temperatures, high-pressure valves.

Under compression in the gland, Types VR3/VR31 die-form into packing rings like VR2, whilst offering the advantage of avoiding the need to laboriously wrap VR1 ribbon tape around valve stems or the cost of an inventory of many sizes of individual VR2 die-formed rings.

Types VR3 / VR31 can be merely cut to length and spiralled into the gland. There is no need for individual cut rings, as is the case with conventional braided packing. Grafan is self-lubricating and will not shrink nor harden nor dry out in use.

Type VR3 / VR31 standard spool length is 8 metres, aside from cross-section sizes 3mm and 5mm where the standard length is 30 metres. Custom lengths can be available - please contact us using the form.

Features
  • Reinforced with Inconel wire to create the ideal packing for high temperature, high pressure valves
  • Designed for high temperature, high pressure and high speed applications.
  • Suitable for use in pumps, valves, mixers, agitators, expansion joints, ball valve seats and other static seals
Operating Limits
  • Pressure Rating: VR3 200 Bar
  • Pressure Rating: VR31 360 Bar
  • Rotary Speed: VR3 30 m/s
  • Rotary Speed: VR31 1 m/s
  • Temperature: -200°C to +3000°C Inert
  • Temperature: -200°C - +600°C In Air

Limits are for guidance only. Product performance is dependent on materials and other operating conditions.

100% pure flexible expanded graphite yarns high Carbon content.

Compatible with media in the range pH 0-14, excluding strong oxidizing agents.

Negligible volatile content.

Low in extractable trace impurities such as chloride and sulphur.

size

Extreme condition, long life and zero leakage packing for all uses, up to high temperature, high-pressure, high-speed applications on pumps, valves, mixers, agitators, expansion joints, ball valve seats and other static seals. Types VR1 and VR31 are designed for use in static applications only. Against all acids, alkalis and solvents (except very strong oxidants), gases, feed water and superheated, or saturated steam.