
Packed glands provide cost effective sealing for most valves, reciprocating and centrifugal pumps, and other rotary equipment. Our extensive range includes packings made from PTFE, aramid, glass fibres, graphite and natural fibres. Many contain advanced lubrication systems, and some are designed to work efficiently under poor mechanical conditions. Significant advances in materials and lubricants, as well as packing design, mean you will be able to select a packing to suit your application on board with the confidence that it will help to keep equipment operating reliably year-in and year-out. Our Quick Reference Chart on pages 4 and 5 presents an overview of our products that are most suited to marine operations, with fuller details contained in this section.
1. Supagraf® Premier

This cost-effective packing is one of our top-of-the-range fugitive emission control products for both rotary and rising stem valves handling hydrocarbon liquid fuels and gases, lubricating oils and chemicals in the marine sector. It is manufactured in exfoliated graphite, and reinforced in a novel way for additional resistance to pressure and extrusion. An advanced lubricant system prevents the pick-up of graphite on the vale stem.
– A best available technique (BAT) product for reducing fugitive emissions in line with the European Union’s IPPC Directive.
– Third party tested and certified to TA Luft Rev 7.2002, VDI 2440 for VOC emission control in valves. Met TA Luft High Grade requirements in tests for Ruhr Oel (Deutsche BP and Petróleos de Venezuela).
– In tests to API 622, it produced an average emission level of 10.5ppmV, with a maximum 37ppmV over five thermals and 1510 mechanical cycles.
– Shell specification SPE 77/312 Class A, Rev 16, 10.2007.
– API 607 Edition 4 Fire Safety, to an expanded specification.
– No special fitting techniques needed.
Service capabilities
Valve stem duties
– Temperature range: -200°C to +450°C.
– Maximum system pressure: 25MPa/250bar
How supplied
Split preformed rings and sets for ease of installation and optimal performance. Also length-form in boxes containing 8m for maintenance economy. Supplied in all popular sections from 3mm upwards to suit standard valves. Non-standard square or rectangular sections made to order.
2. Supagraf® Moulded Rings

High efficiency graphite sealing rings moulded to precise density and size for valves handling high temperature/pressure steam, demineralised water, heat transfer fluids, petroleum products, acids, alkalises, hot waxes and oils. These rings are manufactured from 98% purity graphite foil without binders, elastomers or filler.
– Outstanding performance over long adjustment-free periods.
– Can seal liquid and gaseous oxygen at up to 90°C — consult James Walker first.
– Chemically inert within the range pH 0-14.
– Density range 1.1 – 1.8g/cm3.
Service capabilities
– Valve stem duties
– Maximum temperatures: Steam +650°C.
– Oxidising media +500°C. Non-oxidising +1000°C.
– Minimum temperature: -200°C.
– Maximum system pressure 25MPa/250bar.
– Centrifugal pumps & rotary equipment
– Consult James Walker for service recommendations.
How supplied
Precision moulded rings in endless form, or with single split, or matched scarf split halves. Sections 1.5mm to 40mm; diameters 2mm to over 1100mm. Recommended densities: 1.6g/cm3 for valve stems (with end rings of Grafpak, see below), or mixture of ring densities for special applications. 1.5g/cm3 for rotary duties.
3. Grafpak

A dense, high strength packing of cross-plaited premier quality graphite filament yarns. It is treated with pure graphite before and after plaiting, and further treated with special corrosion inhibitors.
– Recommended for control valves and stop valves on high temperature/pressure marine steam installations.
– Also used for duties with water, condensate, alkalis, acids, solvents and most chemicals.
– Suitable for a wide range of valve sealing duties.
– Low friction for low torque operation.
– Tough and resilient to fretting and extrusion.
– Chemically inert within the range pH 0-14.
Service capabilities
Valve stem duties
– Maximum temperatures
Steam & oxidising conditions: +550°C
Non-oxidising: (significantly higher; refer to James Walker)
– Minimum temperature: -50°C
– Maximum system pressure: 15MPa/150bar typical (refer to James Walker for higher pressures)
How supplied
All popular square sections from 3mm upwards, in boxes containing 8m. Also supplied as split preformed rings and sets.
4. Supagraf® RibbonPak

Made from high purity graphite ribbons, plaited into a flexible length-form packing for convenient on-board maintenance.
– Marine applications include high-speed centrifugal pumps and rotary equipment.
– Excellent valve packing for steam and chemical duties, including IMO Class 1 cargoes.
– High chemical resistance across a wide temperature range.
– Flexible and compressible.
– Reduces inventories — suitable for many marine applications.
Service capabilities
Valve stem duties
– Maximum temperatures
Steam: +550°C
Oxidising conditions: +450°C
– Non-oxidising: +850°C
– Minimum temperature: -200°C
– Maximum system pressure: 25MPa/250bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 25m/s
– Maximum system pressure: 2.5MPa/25bar
How supplied
All popular square sections from 3mm upwards, in boxes containing 8m. Also supplied as split preformed rings and sets.
5. Supagraf® RibbonPak M

Similar to Supagraf® RibbonPak (above), but made with Inconel® wire reinforced graphite ribbons, to provide additional strength plus resistance to pressure and extrusion.
– Marine applications include valves handling steam, condensate, fuels, oils, gases and chemicals.
– High chemical resistance across a wide temperature range.
– Chemically inert within the range pH 0-14, excluding strong oxidising agents.
– Low friction and high thermal conductivity.
– Reduces inventories for valve stem packing.
Service capabilities
Valve stem duties
– Maximum temperatures
Steam: +650°C
Oxidising conditions: +450°C
– Non-oxidising: +1000°C
– Minimum temperature: -200°C
– Maximum system pressure: 30MPa/300bar
How supplied
All popular square sections from 3mm upwards, in boxes containing 8m. Also supplied as split preformed rings and sets.
6. Supagraf® Tape

Supagraf® exfoliated graphite in easy-touse textured tape form. Can be supplied with a self-adhesive backing. This widely used maintenance expedient is usually wound round a valve stem then compressed into the stuffing box.
– Suitable for valves handling high temperature steam, heat transfer media, petroleum products, hot waxes and oils, inorganic and organic acids, and alkalis.
– Chemically inert within the range pH 0-14, but maximum temperature limit may be reduced when used with oxidising agents.
– Version with self-adhesive backing can also be used as emergency gasket replacement.
Service capabilities
Valve stem duties
– Temperature range: -200°C to +500°C
– Maximum system pressure: 7MPa/70bar
How supplied
Cassettes containing 0.5mm thick tape: 10mm wide x 10m long, 15mm x 10m, 20mm x 15m, or 25mm x 15m. Also available with self-adhesive backing.
7. Fluograf®

Fluograf® is made totally from highly-developed GORE® GFO® yarn that combines the benefits of ePTFE, graphite and high temperature lubricants.
– Applications cover most marine services — especially pumps and valves handling aggressive chemicals (IMO Class 1), steam up to 260°C, as well as high speed rotary duties.
– Extended service life — by up to 400% in harsh environments.
– High thermal conductivity for cool running.
– WRAS approved for hot and cold potable water duties to 85°C.
– Service capabilities
Valve stem duties
– Temperature range: -100°C to +260°C
– Maximum system pressure: 8MPa/80bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 22m/s (refer to James Walker for duties to 28m/s)
– Maximum system pressure: 1MPa/10bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 1.0m/s
– Maximum system pressure: 8MPa/80bar (refer to James Walker if duties are more severe)
How supplied
All popular sections from 3mm to 25mm, in boxes containing 8m. Also supplied as preformed rings and sets.
8. Liongraf

A highly reliable pump and valve packing based on graphite and PTFE yarn that is thermally stabilised then lubricated with a silicone-free compound. Sections of 6.5mm square and above are of cross- plaited construction; sections below 6.5mm are plaited.
– Applications cover most marine pump and valve duties.
– Reduces on-board stock holding requirements, as it is very reliable and can be used on a wide range of equipment.
– Strong, durable and extrusion resistant.
– Excellent chemical resistance — pH 0-14.
– Low friction with high thermal conductivity.
Service capabilities
Valve stem duties
– Temperature range: -100°C to +260°C
– Maximum system pressure: 12MPa/120bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 17.5m/s
– Maximum system pressure: 2MPa/20bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 2m/s
– Maximum system pressure: 8MPa/80bar
How supplied
All popular square sections from 3mm to 25mm, in boxes containing 8m. Also supplied as split preformed rings and sets.
9. Duramid®

This tough, high performance gland packing is designed for multi-service on pumps and valves in the marine sector. It is cross plaited from textured aramid yarns, with each yarn uniformly impregnated with PTFE dispersion and a silicone lubricant that resists chemical attack at high temperatures.
– WRAS approved for cold and hot potable water duties to 85°C.
– Excellent abrasion resistance.
– Resilient and responsive in operation.
– Compatible with media in the range pH 2-13, including water, oils, solvents, plus medium strength acids and alkalis.
Service capabilities
Valve stem duties
– Temperature range: -50°C to +250°C
– Maximum system pressure: 15MPa/150bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 20m/s
– Maximum system pressure: 2.5MPa/25bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 1.5m/s
– Maximum system pressure: 15MPa/150bar
How supplied
All popular square sections from 3mm to 25mm, in boxes containing 8m. Also supplied as preformed rings and sets.
10. Hornet

A high performance packing, with excellent abrasion resistance, that absorbs the eccentric action of worn shafts and bearings. It is recommended for marine valves and pumps that handle abrasive slurries, waste water, potable water, or steam. This packing is cross-plaited over an elastomeric core, with wear-resistant aramid fibres at the corners, and PTFE/graphite yarns at the centre of each side to reduce friction and dissipate heat.
– WRAS approved for cold and hot potable water duties to 85°C.
– Compatible with media in the range pH 2-13, including water, oils, solvents, plus medium strength acids and alkalis.
Service capabilities
Valve stem duties
– Temperature range: -50°C to +260°C
– Maximum system pressure: 25MPa/250bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 20m/s
– Maximum system pressure: 2MPa/20bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 2m/s
– Maximum system pressure: 10MPa/100bar
How supplied
All popular square sections from 6.5mm to 25mm, in boxes containing 8m. Also supplied as preformed rings and sets.
11. Ramiex

A versatile high-performance packing, cross-plaited from top quality bleached ramie fibres that are impregnated with PTFE dispersion. Ramie, a tropical nettle plant, produces fibres of extreme durability and greater strength than flax, cotton or hemp.
– Recommended for high pressure reciprocating pumps working with water containing highly abrasive particles.
– Also cooling water systems and sea water systems.
– Excellent resistance to extrusion, abrasion and rot.
Service capabilities
Valve stem duties
– Temperature range: -30°C to +120°C
– Maximum system pressure: 25MPa/250bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 17.5m/s
– Maximum system pressure: 2MPa/20bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 2m/s
– Maximum system pressure: 25MPa/250bar (can be extended to 70MPa/700bar with special support rings on some applications)
How supplied
All popular square sections from 3mm to 25mm, in boxes containing 8m. Also supplied as split preformed rings and sets.
12. Arasele

A clean white packing for marine pumps and valves that helps to overcome the shaft/rod wear problems often experience when inferior aramid-based packings are used with abrasive slurries or aggressive chemicals. It is braided from fine yarns of tough synthetic aromatic polymer fibre, over a rubber core. The yarns are impregnated with PTFE and an inert silicone-free lubricant.
– Rubber core absorbs eccentric movement of out-of-true shafts.
– Resists abrasion and chemical attack.
– Resists hydrolysis: ideal for steam, water, aqueous solutions.
– Compatible with media in the range pH 0-13, including steam, fuels, oils, solvents, acids and alkalis.
Service capabilities
Valve stem duties
– Temperature range: -50°C to +285°C (Note: Traditional aramidbased packings are usually limited to +250°C maximum.)
– Maximum system pressure: 15MPa/150bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 20m/s
– Maximum system pressure: 2.5MPa/25bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 1.5m/s
– Maximum system pressure: 10MPa/100bar
How supplied
All standard square sections to fit pump and valve glands, in boxes containing 8m. Also supplied as preformed rings and sets.
13. Fluolion® Filament L
This packing is cross-plaited from tough thermally stable PTFE yarn. It is impregnated and densified with particles of PTFE and contains an inert running-in lubricant.
– Chemically resistant high-performance packing for pumps and valves that handle IMO Class 1 cargoes.
– Chemically compatible with media in the range pH 0-14.
– Long life valve sealing with minimum maintenance.
– Clean and highly conformable for ease of fitting.
Service capabilities
Valve stem duties
– Temperature range: -100°C to +250°C
– Maximum system pressure: 15MPa/150bar
Centrifugal pumps & rotary equipment
– Operating temperatures: As for valve stems
– Maximum shaft speed: 10m/s
– Maximum system pressure: 2.5MPa/25bar
Reciprocating pumps & rams
– Operating temperatures: As for valve stems
– Maximum rod speed: 1.0m/s
– Maximum system pressure: 10MPa/100bar
How supplied
All popular sections from 3mm to 25mm, in boxes containing 8m. Also supplied as preformed rings and sets.
14. Fluolion® Filament D

The purity of this product enables it to be used with potable water. It is also suitable for slow rotary duties with pumps and plant handling chemicals. The packing is cross-plaited from tough PTFE fibre yarn impregnated with particles of PTFE. It is then cleaned of all organic matter and volatile content.
- WRAS approved for cold and hot potable water duties to 85°C.
- Chemically compatible with media in the range pH 0-14.
Service capabilities
Valve stem duties
- Temperature range: -100°C to +250°C
- Maximum system pressure: 25MPa/250bar
Centrifugal pumps & rotary equipment
- Operating temperatures: As for valve stems
- Maximum shaft speed: 4m/s
- Maximum system pressure: 1MPa/10bar
Reciprocating pumps & rams
- Operating temperatures: As for valve stems
- Maximum rod speeds: 0.5m/s
- Maximum system pressure: 5MPa/50bar
How supplied
All popular sections from 3mm to 25mm, in boxes containing 8m. Also supplied as preformed rings and sets.
15. Valcor® Hi-Temp

This innovative non-hazardous product is braided as a gland packing for high efficiency sealing at up to 1000°C constant on static and slow rotary duties. The material also fulfils other high temperature duties in various forms of construction.
- Applications include seals for Class 60 fire doors and furnace doors.
- Also gland packing for stems of valves controlling hot gas flow at low pressures.
- Non-hazardous alternative to normal ceramic fibre packings.
Health & Safety considerations
Average diameter of the silica fibre used in Valcor® Hi-Temp is 9μm, which is considered non-hazardous to health. No protection is required for breathing, eye, hand or body by the World Health Organisation or European Union during the material’s normal handling, storage and use. Normal hard ceramic fibres, as often used in the manufacture of gland packings for duties at very high temperatures, are around 3μm diameter. These are now considered hazardous to health, with WHO and EU restrictions applied to the products that contain them.
Service capabilities
Static duties — door seals
- Temperature range: -50°C to +1000°C constant, with excursions to +1100°C
- Maximum pressure: Not rated
Valve stem duties
- Temperature range: -50°C to +1000°C constant, with excursions to +1100°C
- Maximum system pressure: Not rated
How supplied
Densely braided compression packing (square, round or rectangular) from 3mm to 100mm sections to any length. Also available as braided insulation sleeves, webbing tapes, ladder tapes, twisted ropes, lagging ropes, blankets and paper.