HP High-Pressure Rotary Valves

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HP high pressure rotary valves

Special inlet for maximum protection against product degradation
High filling efficiency
Lowest air leakage through self-adjusting seals
Robust construction
Easy to assemble and disassemble
Customised solutions
Drilled flanges in accordance with PN10 and ANSI 150lbs
Explosion proof models available up to 10 bar g
Flameproof versions available suitable for St2 products
Versions conforming to ATEX 2014/34/EU available

The HP rotary valves with a specially designed inlet have been designed by DMN-WESTINGHOUSE for applications in the metering and pneumatic conveying of granular formed products under a high pressure of maximum 3.5 bar g. The configuration of the body and rotor has been specifically developed to minimise degradation of the product which runs through it, whilst retaining the best possible pocket filling efficiency.

The DMN-WESTINGHOUSE HP valve has a very important advantage in air leakage: the special configuration of the body and rotor does not only protect the granular product against degradation, it also does not allow any axial air leakage. This means that this valve has an air leakage reduction of one third against other standard high pressure valves.

The HP valves are available in 3 consecutive sizes from 200 - 300, covering a capacity range of the rotor from 8.3 - 30 litre per revolution at 100% filling.

The HP valves are supplied with a 316 stainless steel body and aluminium end covers, in order to have maximum protection against wear.

The standard full end disc rotor is made of 316 stainless steel and has 12 fixed blades. Due to the state of the art manufacturing facility, a high accuracy and tight rotor clearances can easily be attained. The end covers have outboard bearings, lubricated and sealed for life. The special construction of the shaft sealing guarantees the lowest air leakage.

The standard models are suitable for handling products up to a temperature of +80°C and a maximum pressure difference of 3.5 bar.

All models offer optimum venting through the large vent hole, so a maximum product flow into the vented pockets is guaranteed. DMN-WESTINGHOUSE fits SEW drives as their standard.

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DMN-WESTINGHOUSE has been designing and manufacturing rotary valves and diverter valves for the bulk solids handling industry for more than 45 years. As an independent company with no involvement in system design, our sole activity is the development, manufacture and sale of these components.

DMN-WESTINGHOUSE offers tailor-made solutions to the global food, dairy, plastics, (petro)chemical, pharmaceutical, mineral, power and biomass industries. Our line of rotary valves and diverter valves comprises a number of universal components that are suitable for many applications. We also have a range of dedicated components for use in specific industries or to handle specific products. Stringent hygiene requirements and/or low capacities are often required in the pharmaceutical industry. With the emergence of new industries, our rotary valves have also proven themselves to be capable of handling recycled plastic from cars, vegetable waste, and so on.

Our rotary valves and diverters have a well-established reputation for being able to handle all kinds of dry powders and granular materials, such as sugar, cocoa, starch, flour, chemical ingredients, lime powder, china clay, fly ash and wood chips. A number of standard rotary valves can be upgraded, depending on the product to be handled. The housing can be made from Ni-hard casting when working with abrasive products, such as fly ash. Or the inside of the housing can be coated with chromium or tungsten, when working with mild abrasive products.

Diverters by DMN-WESTINGHOUSE come in many types and sizes, suitable for a specific use or a variety of applications. The extensive diverter range comprises a series of plug diverters (dual pipe, single pipe, CIP suitable, gravity) and tube diverters (2-14 ports), some of which are also available in USDA Dairy accepted version. For the mineral industry, the BTD ball type diverter with its rugged design is very suitable for handling abrasive products.

In certain parts of the process industry it is very important that product contamination is prevented in the process. When dealing with powders, there is also always a danger of dust explosions. In order to protect public health and ensure safe working conditions, governments have drawn up official legislation for systems and components. Moreover, private organisations have created specifications components should comply with in order to meet the required branch or system-specific requirements.

With regards to the USDA (United States Department of Agriculture), our AL, AML and BL rotary valves are tested and certified USDA Dairy Accepted. This also applies to our 2- and 3-TDV tube diverters, M-TDV multiport diverter and GPD gravity plug diverter. This means that these components meet the high standards that apply in the US food, dairy, pet food and other related industries.

Process systems and components often have to be able to withstand explosions and prevent fires from passing the component. This has resulted in official European legislation, known as the ATEX 2014/34/EU Directive. All DMN rotary valves and diverter valves are also available in ATEX 2014/34/EU-compliant versions.

In 2011 DMN-WESTINGHOUSE was awarded the official EHEDG Type EL Class I certificates of compliance for its hygienic CIP rotary valves. This enables DMN-WESTINGHOUSE to offer a range of components that are suitable for hygienic ‘clean in place’ (CIP) processing systems.

The European regulation EC 1935/2004 applies to all food contact materials. With regard to the use of these materials as parts in our components, we can supply a declaration of compliance and appropriate documentation that demonstrate compliance to the EC 1935/2004 regulation. The materials used also conform to FDA regulations with regard to food contact.