TPi January 2008

steel stainless

Stainless steel non return valves

The principle of the non return valve with integrated soft sealing in the valve cone has already proved itself in the market, forming the basis for a successful application in many different procedures and areas of industry. Non return valves from Schwer Fittings, Germany, manufactured out of stainless steel 1.4571, ensure maximum precision and functional character.

The company’s range includes non return valves with guts ring connection (German Institute for Standardization 2353 / EN ISO 8434-1) for tube dimensions of light series 6L to 42L and for series 6S to 38S. Schwer also offers non return valves with external thread connection (German Institute for Standardization of ISO 228) in the sizes G 1 / 8 " to G 1 1 / 2 ", and a wide range of valve feathers for different opening pressures. Non return valves with one-piece valve housing and internal thread connection (German Institute for Standardization of ISO 228) by the thread sizes G 1 / 8 " to G 2" and the proved close system with soft sealing are standard. Depending on the connection variant and sealing material, the valves are suitable for many fluids or gaseous media, as well as with raised temperatures.

Eco-Tube couplings provide a high standard of finish p

A selection of valves from Schwer Fittings q

The valves are also available in special materials, on request.

Schwer Fittings also produces Eco- Tube couplings – cavity-free connectors for use when a high standard of finish on all coupling surfaces is required. Eco-Tube couplings consist of four parts: inlet, threaded body, sealing ring and nut. The inlet and threaded body are secured together by the nut. During the process of joining the inlet and threaded body together, the two parts are centred due to a specially designed geometry. Smallerdimensionnutsaremanufactured in hexagonal form as standard, while larger sizes are usually octagonal. The threaded body is fabricated with two flat sides, to facilitate precise installation. Weld-ends are supplied according to customer specification, eg orbital welding or autogenous welding. The centring and ingress of the inlet and the threaded body are such that radial disassembly is simple. The seal is ensured by an O-ring, which can be a standard sealing or an FEP Jacket sealing (O-ring with PTFE jacket). The jacket ensures that no contact exists between the elastomer and the medium. Eco-Tube couplings are suitable for paint-line applications. Schwer Fittings GmbH – Germany marketing@schwer.com www.schwer.com

High quality pipes from Italy TIS, Italy, produces stainless steel pipes for use in sectors that demand pipes of high mechanical and aesthetic quality. All work is performed using high-tech, cutting-edge systems with the support of environment-friendly equipment, and monitored by trained personnel committed to quality.

TIS is able to certify end product quality because only select raw materials are used.

The company produces its pipes starting from top-quality, certified cold and hot laminate sheet from European steelworks. The tight tolerance limits and strict adherence to measurement parameters mean that TIS products are of high technical quality, are highly reliable and provide excellent mechanical performance.

TIS manufactures high quality stainless steel pipes

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Tungsten inert gas (TIG) welding and the application of exclusive production

systems eliminate virtually any alteration in the raw materials and ensure external and internal pipe cleanliness. All production lines are equipped with induced current (eddy current) equipment to detect pipe defects. The structural quality of TIS pipes is further heightened by external satin finish and polishing using a range of grits.

TIS continues to expand its production and sales capabilities, multiplying its efforts towards research into new technological solutions.

TIS Srl – Italy Tel: +39 0341 201724

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Tube Products International January 2008

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