MAXIMUM EFFICIENCY AND PRECISION The overfl ow cover for optimum fl uid control The overfl ow cover refers to an overfl ow valve integrated in the pump cover, which is triggered when the set opening pressure is exceeded. This increases the distance between the closing plate and the rotary piston due to the pressure that builds up. This pressure is counteracted by the widening gap so that the rotary lobe pump is protected from damage caused by pressure surges. Applications: Oil & Gas Dosing Paints and varnishes Loading Technical data Pressure: - VX / VY136 up to 10 bar - EP136 up to 18 bar Sealing material: - FKM - EPDM Cover material: - Steel - Stainless steel Temperature ranges: rotary lobe pump - Identisch mit der Drehkolbenpumpe Identical to the Advantages Replaces large overfl ow valves with bypass lines through direct integration Closes again when the pressure falls below the opening pressure Can be retrofi tted to existing pumps Low maintenance Opening pressure is easily adjustable Opening pressure can be determined from the outside Triggering of the cover is indicated by an optical display An opening sensor can be retrofi tted for digital display Comparably low total weight Pressure intervals easy to implement by retrofi tting a spring Benefi t Protects the machine and thus offers higher system availability due to fewer downtimes Savings compared to external overfl ow valves Easy operation and low maintenance Vogelsang GmbH & Co. KG | Holthöge 10–14 | 49632 Essen / Oldb., Germany | Phone : +49 5434 83-0 | Fax: +49 5434 83-10 | germany@vogelsang.info | vogelsang.info 2 4 3 0 0 0 0 T E M | 4 2 0 2 . 6 0