TPi November 2016

products & developments Easy and safe connection of measuring and display devices

and safely connect analogue and digital measuring and display devices for the temporary or continuous testing of system pressure and other factors. If required, they also allow venting of the system as well as collecting representative fluid samples, eg for analysing the degree of contamination of the fluid. This type of connection requires no tools and can also be carried out during operation under full system pressure up to 630 bar (depending on the type of coupling). The check valve (ball or poppet valve) integrated into the test coupling opens only after connection of the hydraulic tester with suitable adapters or hoses. This ensures safe sealing of the connection without leakage or danger of fluids escaping from the system. Stauff test couplings are not crimped after insertion of the internal valve components and seals, but are closed with a threaded nipple in a fully automated process. Not only does this design contribute to precision and process reliability in production, it also secures the proper functioning of the couplings. The vibration requirements. By varying production stages, the company can achieve hardness values between 160 and 470 HV, tensile strength values (Rm) between 580 and 1,700N/mm 2 , and yield strength between 240 and 1,200N/mm 2 with elongation of more than 50 per cent, for austenitic steels. These features make Tecnofar’s tubes suitable for use in a range of applications, from those that require high hardness and elasticity, to those for which high malleability

In addition to flow, pressure is the most relevant parameter and measuring factor in hydraulics. Measuring system pressure is therefore the most important and most frequently used method for monitoring, controlling and preventive service and maintenance of hydraulically operated machines and systems, and is a prerequisite for their economical operation. Test couplings from the Stauff Test range are planned during the design phase of a machine and installed in suitable positions in the hydraulic system at the factory. They allow machine operators and maintenance personnel to easily

Cross section of a male stud test

coupling SMK with integrated ball valve from the Stauff Test 20 range

protection, which prevents a self-acting detachment of the protective metal cap through vibrations in the system, is another advantage. For the finishing of the test coupling range in carbon steel, Stauff relies on the zinc/nickel surface coating, which provides more than 720 hours of resistance against red rust/base metal corrosion in the salt spray chamber in line with DIN EN ISO 9227. The chromium(VI)-free coating exceeds the highest requirements with regard to resistance and durability and also complies with the valid ELV, REACH and RoHS guidelines. Versions in stainless steel V2A and V4A are generally available from stock. Alternative materials and surfaces are available on request.

The entire range of measuring equipment from Stauff, including test couplings and adaptors

Walter Stauffenberg GmbH & Co KG – Germany

sales@stauff.com www.stauff.com Stainless steel tubes for forming and bending

and deformability are necessary for machining, bending, hydroforming and expanding. These characteristics are required, for example, in component production for the automotive industry, hot water, heat exchangers and thermocouples. Tecnofar also has experience in the production and heat treatment of special nickel alloy and ferritic steel (400 series) pipes.

Tecnofar SpA produces stainless steel and special nickel alloys tubes, welded and cold drawn. The company’s ability to provide tubes in full hard or bright annealed condition, over its entire range, makes the products suitable for many kinds of applications. The drawing process, carried out by means of drawing benches or floating mandrel machines, ensures product compliance with close tolerances on diameter and thickness, with material hardness according to customer

Tecnofar SpA – Italy info@tecnofar.it www.tecnofar.it

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Tube Products International November 2016

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