Recovery made safer
February 1st 2005 A product recovery and waste minimisation system at the Nottingham site of PZ Cussons has brought time and cost savings.
The system is in a feed line from blending room to filling line. For safety, it has a mechanical Plugloc that relies on K bolt interlocks from Castell.
The first of two plugs in the launching trap at the process pump at the end of the line is forced down the pipe by the product, deaerating the line as it proceeds. Upon completion of a batch, the second plug is propelled by compressed air along the line to push any remaining product into a break tank. Both plugs are returned under pressure.
Should a plug need to be removed, Plugloc ensures the line behind the plug is depressurised before access is granted. Opening a vent at the filling end releases a Castell key that is transferred to the pump end. A safetylatching device, with K lock, that prevents access to pump-end pipework, is unlocked by the key. Pipe ends can then be accessed safely without the danger of a pressurised plug in the system. More articles from Castell Safety International Ltd: | 
