James Walker products

Metal to rubber bonded washers, also known as Dowty seals. Designed for use as connector seals in hydraulic equipment, bonded seals (commonly known as Dowty Seals or Dowty Washers) are used across a broad range of applications including fluid systems in power generation, aviation and defence and general industrial applications.

PTFE-based fugitive emissions packing. Proprietary lubrication package ensures low friction, even at sub-zero temperatures. Lionpak 2103 is a low emission packing set consisting of engineered PTFE sintered end rings with braided intermediate rings from tough, cross-plaited, thermally stable PTFE fibre yarn.

A long-term, high integrity sealing solution for control valves. Supagraf Control is an innovative compression packing that provides long-term, high integrity sealing for control valves. Its very low friction enhances the control accuracy of valves. This is a `best available technique` product for reducing industry`s VOC fugitive emissions in line with the European Union`s IPPC Directive. It is manufactured in exfoliated graphite, reinforced in a novel way with a non-metallic structure to provide additional strength and resistance to pressure and extrusion. An advanced lubricant system is incorporated to prevent the pick-up of graphite on valve stems.

A graphite yarn compression packing designed for valves in oxygen service. Supagraf OX has been developed specifically for valve services with gaseous and liquid oxygen, to provide safe operation and low emission rates. This valve stem packing is manufactured in a clean room environment, from yarn to finished product. It comprises high purity flexible graphite yarn treated with oxidation inhibitors. The yarns are individually reinforced with Inconel 600 wire mesh.

A tough, high performance packing, cross-plaited from texturised aramid yarns. Each yarn is uniformly impregnated with PTFE dispersion and a silicone-based lubricant that resists chemical attack at high temperatures. Suitable for a very wide range of media. Excellent abrasion resistance. Long service life with minimal shaft wear. Resilient and responsive in operation.

Devlon A153 is a specially formulated high-viscosity grade of Nylon 66 with superior wear characteristcs. It is yellow in colour. With its improved impact strength and rigidity, this material offers customers a high degree of design reliability when component strength, weight and size are critical. In addition, Devlon A153 has a significantly lower coefficient of linear expansion than normal Nylon 66, which enables customers` components to maintain their dimensional tolerances and clearances more accurately during thermal cycling. This benefit is backed by a long-term service temperature of 100°C, which is significantly higher than that for normal Nylon 66.

Devlon S Grade is a premium grade polyamide thermoplastic with a high molecular weight and superior mechanical properties. It is blue in colour.

Comflex wraps provide a rapid economic solution to the problems of failed expansion joints. Many years of experience of supplying this product has taught us that the emergency answer very often becomes the permanent solution. We offer ex-stock availabilty of all product grades in standard widths of 250mm, 375mm and 500mm from our UK factory.