The quality of a packing's braiding significantly affects the service life of the packing. Packings produced using smaller or outdated braiding machines lack the strength of true cross-lock, are less dense and are not as square in cross-section. The looser the braid of a packing, the lower its durability will be. Additionally, greater gland pressure is required to perform a seal, resulting in increased mechanical stress. As the packing deteriorates, frequent gland adjustments are required, causing more mechanical stress on the packing, leading to accelerated failure.

2 Diagonals
Sec 3x3mm 8 Spindles
Sec 4x4mm 8 Spindles
Sec 5x5mm 8 Spindles

3 Diagonals
Sec 6x6mm 12 Spindles
Sec 7x7mm 12 Spindles
Sec 8x8mm 12 Spindles

2 Diagonals
Sec 10x10mm 24 Spindles
Sec 12x12mm 24 Spindles
Sec 14x14mm 24 Spindles
Sec 16x16mm 24 Spindles
Sec.over 18x18mm 36 Spindles

Type VK4S

Product Information
Vulcan type VK4S is specially designed to be used in the food, pharmaceutical and fine chemical dye industries, to replace standard KEVLAR fibre packings, which contain silicone based lubricants, not suitable for these purposes.

Applications
Type VK4S gives maximum service life in food and pharmaceutical duties on centrifugal and reciprocating pumps, agitators, mixers and valves.

VK4S has excellent acid resistance and can be used against all but the strongest alkalis at high pressures and shaft speeds.

SERVICE CAPABILITY
Pressure Rating: 400 Bar	Rotary speed: 15m/s
Temperature: -100 + 280C	pH range: 0-12

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Product Information
Vulcan Types VT9S and VT9P are specially inter-braided from 100% pure PTFE silk fibres. Type VT9P is braided dry whilst VT9S is thoroughly impregnated with PTFE dispersion and a special inert lubricant.

Applications
Universal chemical, food quality packings which may be safely specified throughout the food, beverage, fine chemical and pharmaceutical industries. Type VT9P is limited to 3m/s rotary speed.

SERVICE CAPABILITY
Pressure Rating: 150 Bar	Rotary speed: 12m/s
Temperature: -200 + 280C	pH range: 0-14

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Product Information
Vulcan Grafan material is essentially pure carbon in Graphite form processed into a flexible foil material without any fillers, binders or other additives. The product is self-lubricating, dimensionally stable, impervious to gases and fluids, and shows exceptional temperature and chemical resistance. Grafan offers unrivalled sealing capabilities under extreme temperature, media and pressure conditions giving extended packing life.

Graphite in this form is self-lubricating with a low coefficient of friction (comparable to Teflon), high thermal conductivity and permanent volumetric elasticity (spring back) which results in no volume reduction (compression set) in use. Resilient with ideal fluid and gas sealing characteristics and extreme capabilities, Grafan offers the ultimate range and performance in a packing material.

Vulcan Type VR1 is a crimped Graphan Ribbon Tape, available from 6mm to 75mm wide, for in-situ packing of pump valve stems and then it is easily compressed into a uniform packing ring. Using this system, a small tape inventory can pack any size gland with superior service results.

Applications
As per Type VR3 below, but for static use only.

SERVICE CAPABILITY
Pressure Rating: 200 Bar	Rotary speed: 1m/s
Temperature: -200 + 3000C (Inert ATM)
Temperature: -200 + 600C (In Air)
pH range: 0-14

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Product Information
Type VR2 Die-Formed Rings are produced by compressing an exact amount of Grafan Ribbon Tape in precision metal moulds. The result: uniform quality, dense, smooth finished, close tolerance, Die-Formed Rings.

A large range of Grafan rings are available ex-stock. Any custom size or shape can be produced, usually from existing tooling with a range of densities available from 1 to 1.8gm/c.c.. VR2 die-formed Rings are supplied just to size for ease of fitting. When energised in the gland, the rings compress to effect a perfect leak-free seal on valves. It is well proven that valves packed with this material have been in service for years, leak-free without maintenance, where previous braided packings have failed in weeks or months.

Applications
As per Type VR3 below.

SERVICE CAPABILITY
Pressure Rating: 200 Bar	Rotary speed: 30m/s
Temperature: -200 + 3000C (Inert ATM)
Temperature: -200 + 600C (In Air)
pH range: 0-14

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Product Information
Vulcan Types VR3 and VR31 are braided packings constructed from 100% Grafan yarns to form truly exceptional capability and performance, pure Graphite packing.

Type VR31 is additional re-inforced with Inconel Wire to create the packing for high temperature, high pressure valves.

Under compression in the gland, Types VR3/VR31 die-forms 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.

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

Applications For Types VR1, VR2, VR3 and VR31
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 oxidisers), gases, feed water and superheated, or saturated, steam.

SERVICE CAPABILITY
Pressure Rating: 200 Bar (VR3) 360 Bar (VR31)	Rotary speed: 30m/s (VR3) 1m/s (VR31)
Temperature: -200 + 3000C (Inert ATM)
Temperature: -200 + 600C (In Air)
pH range: 0-14

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