This self-priming, external spur gear pump has 1/2 –inch ports and will deliver flows up to 3 gpm. Maximum rated differential pressure for the pump is 140 psi. Designed for simplified maintenance, the pump may be quickly disassembled without the need to break piping connections. The G4 is designed for continuous duty use and can handle a wide variety of applications ranging from viscous to very thin clear, non-abrasive fluids.
Pump housings are investment cast in a variety of corrosion resistant metallurgies; with adequate wall think nesses for hydro testing. Housings are finish machined on precision CNC equipment.
Metallic and non-metallic gears are machine generated. A variety of materials are available, and an existing pump can be quickly converted to satisfy different service conditions. Combination metallic and non-metallic gear sets allow the pump to handle low viscosity and non-lubricating fluids at standard motor speeds. This capability provides reduced noise levels and eliminates the need for larger pumps operating at reduced speeds. All gear materials are non-sparking for use with hazardous fluids.
Pumps do not require periodic lubrication, since the pumped fluid provides the necessary lubricants and cooling. In addition to reducing maintenance, this feature eliminates the possibility of contamination of the pumped fluid.
Mechanical seals are available for the most demanding applications. Single internal and double seals provide operation to 140 psi. Single external seals provide limited service to 50 psi. Two stuffing box designs are also offered.
Because they are expressly designed for chemical service. Eco gear pumps do not include integral/built-in by-pass or pressure relief valves. Designs with these internal valves can cause heat built-us in the pumped fluid, resulting in accelerated corrosion rates, possible vapor binding or even pump seizure. Instead, ECO recommends the use of externally mounted pressure relief valves, piped back to the fluid source. ECO can supply such relief valves, in various metallurgies, for many process requirements.
Optional features include bearing flush plugs and housing vent port. Available accessories include bolt-on heating/cooling jackets, pressure relief valves and backpressure valves.
Pumps components, in all offered materials, are stocked to provide quick delivery. A variety of Constant or variable speed motors, with electric or air power, are also stocked for quick delivery of completely mounted and assembled pump packages. Pumps and replacement parts are stocked worldwide.
GENERAL SPECIFICATION
Port size and type
1/2 inch NPT or BSPT
Port location
Side inlet and outlet
Direction of rotation
Bidirectional
Theoretical displacement
.189 gal/100 rev (7.16cc/rev)
Drive shaft diameter
3/8-inch
Maximum differential press
140 psi (977 kpa)
Minimum system pressure
.1mm Hg (abs)
Maximum speed
1725rpm
Capacity at 1725 rmp, 0psi
3 gpm (.68 m3/hr)
Maximum viscosity
100,000 cP
Minimum viscosity
None
Maximum fluid temp
450 0F (232 0C)
Minimum fluid temp
-100 0F (-73 0C)
Fluid pph range
0-14
Bearing Type
Internal sleeve
Bearing lubrication
by pumped fluid
Packing arrangements
standard or lantern ring box
Mechanical seals to 50 psi
single internal or double seals to 175 psi.
Single external seal to 50 psi.
Approximate weight
4.2 lbs. (1.9 kg) pump only
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