Neptune® Series 500 Hydraulic Metering Pumps Tackle Tough Water Cooling Tower Applications

Lansdale, PA - June 18, 2009 - Neptune(TM) Chemical Pump Co., Inc., a leading manufacturer of chemical metering pumps and an operating company within Dover Corporation's Pump Solutions Group (PSG(TM)), announced today that all variations of its Series 500 hydraulic metering pumps have been designed to handle the demanding operating conditions present in all water cooling tower applications.

Neptune is able to make this claim because the construction of the Series 500 hydraulic metering pumps feature a Variable Oil By-pass(TM) stroke adjustment that allows better valve performance when compared to variable-linkage designs. This is possible since the valve checks have extra time to seat, even in heavy liquids, since they are idle during the by-pass portion of the suction and discharge strokes. Series 500 pumps are also the only pumps that feature EZE-CLEAN(TM) valves, whose cartridges can be removed for cleaning without disturbing the piping to the pump.

Series 500 pumps also are available with four automatic control options:

o Electric Stroke Control - Allows control automatically by a process instrument or manually from a remote location
o Pneumatic Stroke Control - Can be controlled by an instrument air signal to change stroke length.
o Variable Speed Control - Controlled automatically by a process instrument using a variable-speed drive to change pump-stroke speed.
o Sodium Hypochlorite Gas Bleed - A special head designed with an automatic air release valve to vent gas accumulation from chemicals that off gas, such as sodium hypochlorite.

Neptune(TM) Chemical Pump Co. is an operating company within Dover Corporation's Pump Solutions Group (PSG®). Formed by its parent company Dover Corporation (DOV: NYSE) in 2008, PSG combines the following operating companies into a cohesive pump organization with a broad array of pump technologies: Wilden®, the world's largest manufacturer of AODD pumps; Blackmer®, the largest global manufacturer of sliding vane pumps; Mouvex®, a manufacturer of eccentric disc pumps; Griswold®, an ANSI centrifugal pump manufacturer; Almatec®, a premier manufacturer of air-operated diaphragm pumps specializing in plastic pumps with solid housings; and Neptune®, a producer of chemical metering pumps and chemical feed systems. For more information, go to or email us at

James Marengo,
Marketing Manager
(215) 699-8700 ext. 3383

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