Document Centre Send Us Your Enquiry About Us Industries & Applications Products & Services Contact Us Back to Document Centre Technical Papers Analysis of surface roughness and profile parameters of graphite packing deposition on valve stems and how this influences frictional performance Specific stem surface finishes that optimise friction and fugitive emission performance of graphite based control valve packing have been identified and reported; however the reasons behind this varied performance, specifically friction, and the effect of the resultant graphite boundary layer deposit remains unclear. Compatibility testing of elastomeric materials for rotary sealing use with Environmentally Acceptable Lubricants (EALs) in marine propulsion applications At James Walker we have been carrying out static immersion testing on EALs for many years, and continue to do so; although during this time it has become apparent elastomeric compatibility can vary between static and dynamic applications. Elastomers in bioprocessing EPDM gaskets - what debate? This white paper examines why adapting materials from other applications causes serious underperformance in high specification industries such as biopharmaceuticals. Eliminating gasket to ferrule adhesion Eliminating gasket to ferrule adhesion. Extractables and leachables - a converter’s view A technical paper first presented at the RAPRA conference, London, September 2010. How stem finish affects friction and fugitive emissions with graphite-based control valve packing Achieving reliable performance with graphite packing sets in high cycle duties requires a different approach to the boundary tribology between the packing and stem. Human factors in Biopharma sealing Human factors in Biopharma sealing Human factors in Biopharma sealing: Overtorque Overtorque Intrusion and sealability Intrusion and sealability. Low temperature sealing capability of O-rings: The relationship between laboratory tests and service performance Many engineers or purchasing professionals have requirements for O-rings that operate at low temperatures. They rely on the information provided from technical data sheets, and in many cases will compare the minimum operating temperature claim from several seal suppliers before making their choice. Marginal performance gains Are we increasing operational risk by ignoring marginal performance gains in elastomer technology? Minimising human factors in gasket change-out Minimising human factors in gasket change-out Piston seal and material design EBA chromatography column - client Biotechflow Ltd Technical case study following the developmentof piston seals for a new design of Chromatography column. Problems and solutions with expansion joints in gas turbine applications Expansion joints have been installed on gas turbine exhaust ducts since they were first introduced for power generation applications. Product development of Metaflex HFA SG/IR-CK Gasket Product development of Metaflex HFA SG/IR-CK Gasket. Reinventing the seal An innovative sealing solution for large diameter rotary sealing applications in the wind industry. Successful sealing of problem flanges in high temperature/pressure applications This paper explains the main causal factors of problems encountered with stainless steel pipe flanges in areas subject to high temperatures and pressures and details the solution now employed as a result of the James Walker study and research. Technical report - Gaskets for polyethylene (PE) pipe connections A technical guide for gaskets to suit PE pipe connections. The benefits of using the correct seal material The benefits of using the correct seal material. The combined effect of material and intrusion The combined effect of material and intrusion. ← Previous 1 2 Next → Document Centre For industry or application News Desk Case studies, images and news Current Vacancies Global career opportunities Sign up for products and services news Back to top ABOUT US Home About James Walker Our History Procurement News Desk Career Opportunities Customer Satisfaction Contact Us INDUSTRIES & APPLICATIONS Chemical and Petrochemical Construction Defence and Aerospace Engineering and Manufacturing Food and Beverages Marine Propulsion Marine Transportation Metallurgical Mineral Oil and Gas Paper, Pulp and Board Pharmaceutical and Bioprocessing Power Semiconductor and Electronics Valves Water and Waste PRODUCTS & SERVICES Cartridge Seal Systems Compression Packing Critical Metallic Sealing Elastomer Technology Engineering Plastics Environmental Excellence Expansion Joints and Bellows Flange Management and Joint Integrity Flooring and Decking Products Gaskets and Sheet Jointings Hydraulic Sealing Products Mechanical Seals O-rings Ring Type Joints Rotary Seals Seals in PTFE and Engineered Thermoplastics Static Seals Tension Control Bolting Valves Vibration Attenuation Products DOCUMENTS & PAPERS Case Studies Technical Papers and Presentations Document Centre FOLLOW US James Walker on Twitter James Walker on LinkedIn James Walker on YouTube James Walker on Instagram Sign up for products and services news © All contents copyright of James Walker. 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