Graco 258262, Operation, Service, & Parts, Page: 14 / 16

Technical Data
14 311842G
Technical Data
† Usable reservoir capacity, as measured from centerline of top gauge glass to centerline of bottom gauge glass
(see page 11).
‡ All displacements are based on SAE 30 oil (500 S.U.S. at 100°F.) at room temperature. Volumetric equivalents of
drops are: 14,115 drops equal 1 pint, 490 drops equal 1 cu. in., 30 drops equal 1 cc.
Construction Materials
Reservoir and Cover - Heavily ribbed cast iron.
Cylinder - Hardened alloy steel, precision-honed.
Plunger - Hardened alloy steel, precision-ground and
fitted.
Valves - Poppet type, flat face, hardened and ground
alloy steel.
Valve Seats - Hardened and ground alloy steel.
Driveshaft - Integral crankshaft type, hardened, ground
and polished alloy steel, machined from solid bar.
Bearings - Bronze bushed, high load capacity, long-life,
self-lubricating type.
Regulating Lever - Forged steel.
Plunger Diameter 1/4 in. (0.64 cm)
HP-50 Maximum Operating Pressure 50,000 psi (344 MPa, 3,447 bar)
Reservoir Capacity 9 quarts (8.5 liters) from centerline of top gauge
glass to centerline of bottom gauge glass
Maximum Pumping Rate based on SAE 40 oil — (approx. 4 drops) 0.008 in 3
(0.133 cc) per stroke
Minimum Pump Rate
0.001 in
3
(0.017 cc) at max. pressure
Operating Speed 3 to 36 rpm
Reservoir Heating (optional) Steam or Electric
Lubricant Viscosity 100 to 5000 SUS
Operating Temperature -20°F to 120°F (-29°C to 49°C)
LUBRICATOR CHARACTERISTICS
Pumping Unit Displacements‡
Model Number of
Feeds
Maximum
Operating
Pressure
Reservoir
Capacity
(Quarts)†
Plunger
Diameter
(Inches)
Drops /
Stroke
cu. in. /
Stroke
cc / Stroke Strokes / min.
Max. Min. Max. Min. Max. Min. Max. Min.
HP-50 1 to 4 50,000 9 1/4 4 1 0.008 0.002 0.133 0.033 36 3