Gemu: Aseptic Globe Valves

Sept. 3, 2012
Gemu: Aseptic Globe Valves

The new GEMÜ 505/555 pure steam Aseptic Globe valves are made of quality materials and offers optimal processing of individual media as well as advantages in terms of performance and maintenance.

In the foodstuffs industry, the chemical and pharmaceutical industry, and even in other industrial sectors, products must sometimes be manufactured aseptically. As a result, stringent requirements are made of the purity of the working media which are used during manufacture and even the quality of the steam used. If steam comes into contact with surfaces or directly with liquid or gaseous products during aseptic production, this contact must satisfy the purity requirements of these products. The solution is found in complex pure steam systems at product requirement level. GEMÜ has long maintained intensive contacts with plant engineers and operators who have these systems in use and took one particular customer project as a suitable occasion for checking its valve solutions and developing them further.

High quality – High value for money

When designing the new globe valve range, it was important to meet the high quality and safety requirements demanded of the pure steam processes without losing sight of the question of the purchasing cost. For reasons of quality, all wetted parts are made of high quality stainless steel (316L), while internally the valve body is actually mechanically machined clean and externally electropolished. "As far as surface quality is concerned, we are able, thanks to the body geometry on the inside of the body, not only to produce Ra values of down to 0.4 µm but to even reproduce them. In addition, particular importance was also attached to the seal materials (seat code 5P) which also satisfy the stringent requirements of the FDA. The seals were tested according to USP Class VI at 121°.

Even in the actuators, the basic materials and the processing of the individual materials are impressive, whether it is the stainless steel bellows which accomplishes up to 100,000 cycle duties without problems and enables the actuator to use non-ferrous metals. Or whether it is the valve plug which is designed without threads and, as a result, requires little maintenance and which is provided with a seal made of extremely inert, acid and heat-resistant thermoplastic synthetic material (PTFE). Or it may be the special feature that the valve plug is sealed with the valve spindle and then smoothed and, as a result, eliminates the otherwise usual "dirt pockets" which occur with valve plug solutions which are bolted together. Because of these and other finer points, both angle seat globe valve variants provide a long service life including outstanding material.

See Gemu's website here for full details.