GENERAL DESCRIPTION
The ARO U.L. listed pump for pumping petroleum products, offers high volume delivery even at low air pressures and easy
AIR AND LUBE REQUIREMENTS
WARNING EXCESSIVE AIR PRESSURE. Can cause pump and property damage. The air supply must be limited to 50 p.s.i.g. (3.4 bar) maximum inlet air pressure.
yThe air supply line or hose to the pump should be ad- equately sized to carry a sufficient volume of air to the pump. The material inlet supply tubing should not be too small or restrictive which will inhibit material flow. The outlet material volume is governed not only by the air supply but also by the material volume available at the inlet.
yAir supply provided should be filtered to provide clean dry air. A filter capable of filtering out particles larger than 50 microns should be used on the air supply. There is no lubrication required other than the “O” ring lubricant which is applied during assembly or repair.
yIf lubricated air is present, make sure that it is compatible with the “O” rings and seals in the air motor section of the pump.
INSTALLATION
IMPORTANT
yRequirements for the installation are included in the Flammable and Combustible Liquids Code, NFPA No. 30, Automotive and Marine Service Station Code, NFPA No. 30A and the National Electric Code, ANSI / NFPA No. 70.
yA fluid return hose which is compatible with the fluid be- ing pumped must be installed to the relief valve on the outlet manifold to return fluid back to the supply tank or pump inlet.
yThe pump must be grounded to prevent static discharge. Grounding may be accomplished through the legs or to the ground lug provided on the pump.
yNotice that the material inlet / outlet manifolds may be removed and rotated 180° to facilitate various mounting applications.
yIf the body of the pump must be rotated, remove the end covers and manifolds and index it so the bolts line up properly. NOTE: The arrow on the end caps must always point upward for optimum performance.
yWhen the diaphragm pump is used in a
ySecure diaphragm pump legs to a suitable surface to in- sure against damage by excessive vibration.
OPERATING INSTRUCTIONS
yThe pump should never be operated at pressures exceed- ing 50 p.s.i.g. (345 kPa) inlet air pressure. This pump is equipped with a pressure relief valve on the material out- let manifold which will open at 40
yDisconnect the air supply from the pump if it is to be in- active for a few hours.
MAINTENANCE
Refer to the part views and descriptions as provided on pages 4 through 7 for parts identification and service kit in- formation.
yCertain ARO “Smart Parts” are indicated which should be available for fast repair and reduction of down time.
yService kits are available to service two separate diaphragm pump functions: 1. AIR SECTION, 2. FLUID SECTION. The Fluid Section is divided further to match typical active Material Options.
yProvide a clean work surface to protect sensitive internal moving parts from contamination from dirt and foreign matter during service disassembly and reassembly.
yKeep good records of service activity and include the pump in preventive maintenance program.
yBefore disassembling, empty captured material in the outlet manifold by turning the pump upside down to drain material from the pump.
y Loctite® is a registered trademark of Henkel Loctite Corporation y ARO® is a registered trademark of
y Kynar® is a registered trademark of Arkema Inc. y Viton® is a registered trademark of the DuPont Company y
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