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With the new type 8621, Schubert & Salzer combines ASME standards for the first time with sliding gate technology. It is the first sliding gate control valve not to be built in wafer design, but instead on the basis of ASME B16.34 incl. a flange connection according to ASME B16.5. Sliding gate valves can now be selected with a standardized overall length according to ANSI ISA 75.08.01; plant operators  can quickly and simply replace traditional globe valves by much more efficient valves with sliding gate technology.

In comparison with globe valves, users of sliding gate valves benefit from critical advantages, such as minimal consumption of energy due to small actuation forces and fast response due to small strokes. Other features are the controllability of high differential pressures with small actuators, low-noise and cavitation-insensitive operation as well as high variable Cvs/Kvs values (you can find out more about sliding gate technology here).
The new sliding gate control valve type 8621 is the first Schubert & Salzer valve to be produced not only in Germany, but also in the USA at our location in Concord, North Carolina.

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Schubert & Salzer Inc. was founded over 20 years ago in Concord, North Carolina as a strategic hub of the Schubert & Salzer Group. Since then, a strong network of sales reps and regional offices has been successfully established, delivering quality products made in Germany to customers in North and South America.

This success prompted us to expand the expertise and capacities of the subsidiary. In order to be able to offer our customers an even faster and more comprehensive service, the production of a new product line has now started in Concord. This was designed by an international team of developers in accordance with ASME standards especially for the American market.

Over the entire planning process up to the present day, products, logistics and manufacturing specialists from the Schubert & Salzer Group have been supporting the still-young production with expert know-how. This ensures that our high quality standards will be maintained in the future also: "Schubert & Salzer – Quality products made in the USA".

Our developers said to themselves, "It could be even more compact". The result: A sliding gate valve (GS) with impressively reduced dimensions and weight – type 8028. Due to the new 80-mm diaphragm actuator, the type 8028 GS1, for example in DN100, with an installation length of just 487 mm, is another 50 mm shorter than the already compact GS valve with piston actuator. In terms of control accuracy, the GS type 8028 is in no way inferior to its big brother, the type 8021, and impresses with a rangeability of 80:1. For the high control quality of the GS valves, their very good response behaviour is particularly decisive. Very short reaction times at the highest resolution are achieved due to small actuator travels, low moving loads and low actuation forces. With the new type 8028 valve, modern plant installations designed with increasingly smaller dimensions also enjoy the benefits of sliding gate technology.

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The adjustable sliding gate orifice type 8090 uses almost the entire performance of the GS1/GS3 proven GS valve series and is suitable for precise and continuous adjustment of a defined flow. It can be adjusted and secured manually in the installed state during operation. Stops in the end positions and a high-resolution position indicator enable reproducible setting. Among other things, the orifice facilitates the hydraulic adjustment of cooling systems, e.g. when commissioning large engines in CHPs and on ships.

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Centrifugal pumps depend on cooling and lubrication to operate efficiently, reliably and with a long service life. The solutions commonly used for this purpose in the industry are mostly constructions made of a lot of different components. These are often not exactly matched to each other and also require a lot of space and installation effort.

Schubert & Salzer Control Systems has now developed an out-of-the-box solution for this specific application. In this case, the cooling and lubrication of the shaft seals in centrifugal pumps with the operating fluid is controlled via a compact manifold. The adjustable 7010 angle-seat shut-off valve integrated into the block allows a flow rate of 10 to 50 l / h to be set.

When the pump is started, the pneumatic valve opens simultaneously, so that cooling and lubrication are ensured immediately. The liquid sensor integrated in the manifold permanetly checks that coolant always flows when the pump is running. If there is no cooling the pump is switched off to prevent damage to the shaft seal and to prevent it from getting stuck. The switch-off and switch-on functions can be carried out via the pump control or can be taken over by a PLC.

Schubert & Salzer Control Systems thus offers an efficient out-of-the-box solution for the cooling and lubrication of shaft seals in centrifugal pumps. As a complete solution, the new system is not only more compact than the solutions commonly used in industry, but also significantly reduces installation and maintenance costs.
The manifold is suitable for all centrifugal pumps within the specified performance range. In addition, it can be extended with e.g. manometer connections, pressure and temperature sensors. Further options and intelligent, specific, modular solutions are also possible.

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