Qty 3: Nichols Zenith Digital Metering Pumps, QM-SY-10. 20.2 CC/Revolution. 9.0-180 RPM, continuous duty, 4.7 amp, 1/2 HP, 90 VDC. Pacific Scientific motors mounted on the base. Yellow safety guards cover pump.

In 1926, Zenith Pumps was approached by the synthetic fiber industry to design a
pump to provide a precise, pulseless, repeatable flow and assure better quality
control. The options then were the same as those in the chemical process industry
today–diaphragm, lobe, coarse gear, piston, plunger, and screw pumps. Each
had problems with pulsation, flow inaccuracies, multiple seal areas and slippage,
which required constant calibration, high maintenance, and extended downtimes.
Zenith Pumps met the challenge and designed a rotary external gear pump of
unique precision and simplicity. Manufacturing techniques were developed to hold
tolerances to + .00005" minimizing internal clearances to assure accurate and precise
metering. The pump’s simplistic design of only three moving parts–two
metering gears and a drive shaft–provided long life and easy maintenance.
For years since, process engineers have relied on Zenith to provide precision
fluid handling solutions for their most difficult pumping applications. Zenith gear
pumps can be found wherever precise, pulseless, repeatable metering of fluids is
required.

Features:

High Accuracy. Stable, repeatable flows are assured even under varying conditions of pressure, viscosity and temperature. Minimum Pulsation. Unique design offers virtually pulseless flow without valves or flexible elements to hinder performance. High Temperature Capability. Operating temperatures to 950°F (510°C). Maximum Life. Only three moving parts; components are throughhardened tool and die steels to 64 Rc or better. Replaceable sleeve bearings for low-cost rebuilds. High Volumetric Efficiency. Maximum efficiency is achieved with optimum operating clearances and assured under pressure by built-in alignment dowels. Precision Construction. Ground and lapped components for close of operating clearances.

Specifications:

Pump Type: Rotary external spur gear, single stream.
Rotation: Refer to pump drawing.
Operating Speed: 9.0–180 rpm depending upon application conditions and fluid viscosity.
Temperature: To 950°F (510°C).

Applications:

The H-Series pumps are ideal for metering in such applications as:

Adhesives, Additives, Asphalt, Abrasives, Bottoms, Foams, Coatings, Inks, Fibers, Pitch, Urethanes, Surfactants, Oxide Slurries, Lubricants, Polymers, Plasticizers, Polyols, Plastics, Paints, Resins, Monomers, Oils, Pigments, Tars, Many others.

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