ECO Gearchem Pumps offer the reliability you need to safely handle clear lubricating and non-lubricating liquids. Extensive material availability provides versatility for pumping low or high viscosity fluids over a broad range of temperatures, pressures, and corrosive services. Typical applications for these self-priming, external-spur gear pumps include chemical transfer, cyclic operations and continuous production systems - both open-end and closed-loop. They are well suited for pilot plants, vacuum sys tems and metering applications.
At the heart of each ECO Gearchem pump are two tightly toleranced, machine- generated spur gears consisting of a drive and an idler gear. Self-priming capability is accomplished by our closely toleranced gears which evacuate air from the suction piping. Gearchem pumps provide linear, pulsation-free flows. And the pumps are bidirectional. This lets yo u easily change flow direction.
We offer six models with a maximum capacity of 60 USGPM (13.6 m 3 /h). Most models offer maximum differential pressure of 100 psi (6.9 bar). ECO pumps are designed for temperatures ranging from -100 F to +450 F (-73 C to +232 C). Gearchem pum ps are ideal for vacuum applications where system pressures are as low as 0.1 mm Hg abs.
ECO Gearchem Pumps Product Specifications
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General Specs
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G2
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G4
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G6
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GH6
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G8
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GH8
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GA12
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GA16
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Port Size & Type
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1/4"
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1/2"
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3/4"
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3/4"
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1"
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1"
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1.5"
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2"
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Port locations
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Side inlet and outlet
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Direction of rotation
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Bidirectional
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Theoretical Displacement
(gal / 100 rev)
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.108
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.189
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.684
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.684
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1.368
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1.386
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2.792
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5.584
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Drive shaft diameter
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3/8"
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1/2"
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3/4"
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1/2"
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3/4"
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1"
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Max. Differential Pressures
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100 psi
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200 psi
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50 psi
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100 psi
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150 psi*
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100 psi
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Maximum System Pressure
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200 psig
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150 psig
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210 psig
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150 psig
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200 psig
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Maximum Speed
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1725 rpm
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1150 rpm
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Capacity at Max. Speed, 0 psi
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1.5 gpm
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3 gpm
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10 gpm
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22 gpm
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28 gpm
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60 gpm
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Maximum Viscocity
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75,000 cp
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Minimum Viscocity
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None
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Maximum Fluid Temperature
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450 F (232 C)
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Minimum Fluid Temperature
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-100 F (-73 C)
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Bearing Type
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Internal sleeve
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Bearing Lubrication
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By pumped fluid
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Packing Arrangements
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Standard or Lantern ring box
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Lantern ring box
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Standard or lantern ring box
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Lantern ring box
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Mechanical seals
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Single internal, double or external
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Single internal or double
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Single internal, double, or external
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Single internal or double
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Approx. weight, pump only
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4.2 lbs.
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7 lbs.
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11.2 lbs.
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10 lbs.
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14 lbs.
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39 lbs.
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80 lbs.
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* Consult factory for application
Alloy gear pumps offering versatility in chemical services.
Extensive Material Availability To Satisfy Your Pumping Needs
Pump housing components and drive and idler gear shafts are available in two types of austenitic stainless steels - 316 and Alloy 20 - and high-nickel Alloy C. All housings are investment-cast and precision machined for high quality and durability.
Gears
A broad selection of metallic and non-metallic gears are available to meet a wide variety of process conditions. This includes non-sparking, gall resistant Alloy C. Alloy 20 stainless steel is also available. Where conditions do not allow metal-to-metal c ontact, glass-filled Teflon, carbon graphite, and PEEK (polyetheretherketone) can also be used as gear materials. In conjuction with a metallic drive gear, these materials allow extended life at full-speed operation even with fluids with viscosities less than 1 cps.
Wearplates
Wearplatesare used on ECO Gearchem pumps to permit easy restoration of a pump to "like-new" performance.
Carbon graphite wearplates are used most often since they are suitable for all pump speeds over the full range of viscosities and temperatures. Additional materials include glass-fileld Teflon, PEEK, and ceramic which are used in certain applications, such as those where exposure to strong oxidizers makes carbon graphite unsatisfactory.
Bearings
Beaings used in ECO Gearchem pumps are of the internal sleeves type and are colled and lubricated by the pumped fluid. This eliminates the risk of contamination from external lubricating materials. Carbon graphite and glass-filled Teflon are offered beca use of their proven durability and inherent self-lubricating properties.
Mechanical Seals
Our pump seals prevent or minimize product leakage and ingress of air to the process stream. Selection of the seal arrangement, probably the most important step in pump specification, depends upon suction pressure, discharge pressure, viscosity, and other fluid characteristics and typ eof service.
ECO Gearchem Pumps allow for quick and easy conversion in the field from one type of seal to another, if required, without special tools or training.
Three types of seal and packing arrangements are available for ECO Gearchem Pumps:
Mechanical seals on Gearchem pumps are of the John Crane type 9 design. Primary sealing is accomplished by the lapped surface of the stationary sealing wedge. Teflon O-rings or gaskets seal the stationary seat against the seal housing.
The single internal mechanical seal is suitable for all recommended pump operating pressures and temperatures to 250 F (121 C). For fluids that tend to crystallize or precipitate, or for vacuum or high temperature applications, a double mechanical seal is often used.
An external mechanical seal is mounted outside the pump housing. This arrangement permits easy adjustment and inspection of the seal faces. The addition of a housing extension procudes a vacuum seal for operating pressures as low as 0.1 mm Hg abs.
The mechanical packed box designs use braided Teflon or Graphoil rings to control leakage along the shaft.
Options.
Under certain process conditions, special options are required to insure that the pump operates satisfactorily. We offer design features such as:
