How Valve Systems Provide Optimal Flow Control and Precise Dosing

Related Vendors

Glatt Ingenieurtechnik GmbH

Italvacuum, Srl

Anton Paar GmbH

EBRO ARMATUREN Gebr.Bröer GmbH

From a design point of view, the six vanes of the impeller wheel only run through the zero axis of the casing. The discharged product is neither scraped along the walls and compressed nor banked up. Any granules thus retain their shape and are not crushed into the sides, assuring an extremely product-friendly and energy–efficient production. Ebro impeller valves can be enhanced with an optional stop function. After the lock is “closed”, the next pair of vanes close off the impeller in the zero position and shut the pipe. The designers of this valve placed particular emphasis on the bearing system of the shaft: The entire unit is completely encapsulated and can be uninstalled without having to remove the impeller valve from the plant.

Minimal Wear and Tear

The valves of the new TW–M provide a number of special features. Originally designed for use as hard–wearing butterfly valves for silo vehicles, these valves are now being used in many areas where a gas seal is not strictly necessary, but where a higher degree of abrasion–related wear and tear is experienced. Unlike inserted or vulcanised elastomer liners, the tough metal rings offer sufficient resistance to any sharp–edged granules or fast–flowing media. This means the service life of the plant can be significantly increased and plant outages and maintenance periods reduced.

Almost Cavity–Free Sealing

The one–piece, precisely slotted shaft and flat shape of the valve disc used at the centre of rotation prevent any passing material from being dragged through. This makes the new butterfly and control valves almost cavity–free. No frequently changing batches are mixed together and the purity of conveyed goods is thus preserved. The casing of the TW–M is made out of lightweight metal with an irremovable, built–in stainless steel ring. This means that, despite its minimal weight, all components in contact with the passing material are corrosion resistant and FDA–approved. For transport containers and silo vehicles, metal seal valves with a customs–approved, bonded plate can be supplied. The option of being able to lock the disc does not have to be dispensed with in such cases. The high–precision axial lock ensures the disc sits perfectly in any position, even when vibration or jolting occurs and the long–life shaft seal helps keep maintenance to a minimum.

The seal between opposing flange surfaces is achieved via O–ring seals. All available sealant materials can be used for this purpose without any problems eliminating the need for any additional, hard–to–insert, flat seals. The large–scale flange surfaces support both customer–specific, individual drill patterns as well as standard drill profiles as per DIN, ANSI, JIS and other industry standards.

* The author works in the marketing for Ebro Armaturen.

(ID:42510533)