New chopping valve for the production of polypropylene and polyethylene

Phil Black - PII Editor 26/07/2010

205 1 minute read

Listen to this article

Reliable reduction in size and discharge of agglomerates

Zeppelin Systems UK Ltd located in Nottingham in conjunction with their Head office in Friedrichshafen Germany has perfected a new chopping valve for the production of polypropylene and polyethylene. The valve reliably reduces the size of agglomerates which develop during the production process and consequently avoids blocking of the process lines. The rotary valve is proven and already working in demanding environments.

When the process starts agglomerates which have settled on the inside vessel wall may break loose and enter the conveying system. Conventional valves are blocked by the compact agglomerates of up to 250 mm in width and 300 to 800 mm in length. The design of the new valve with offset rotor chambers, an admissible drive torque of 10000 Nm and an extremely rigid construction allows reliable breaking of these agglomerates.

The cutting devices which have been installed in valves up to now in order to break agglomerates require a high degree of maintenance (exchange and readjustment). For Zeppelin’s chopping valve this function is realized by a chopping insert which is both: sturdy and exchangeable. The insert and the solid construction of the valve

contribute to a significant reduction of idle times of the valve and consequently of the complete process. Furthermore, the solid construction does not only have an impact on the times required for maintenance, repair and readjustment but also minimizes the quantity of leakage air by the reduced gap between the rotor and the casing.

Another advantage is the use of an electric motor for the new Zeppelin chopping valve type PFC 650/160. Compared to hydraulic motors the electric type allows a very compact construction and therefore reduced space requirements.

For more information contact;

Zeppelin Systems UK Ltd, Annesley
Notts. Tel. +44 (0)1623 753291

E-mail: Martin.stevenson@zeppelin-uk.com
Web www.zeppelin-industry.com