ARO 650485 Series Manuel de l'opérateur - Page 2

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650485- X X X

Packing Material

Spring Arrangement

Plunger Type

GENERAL DESCRIPTION

The two-ball pumps are primarily designed for the pumping of

medium viscosity fl uids. Stainless steel construction off ers compat-

ibility with a wide range of fluids. The two-ball design provides

better priming of the lower foot valve. The double acting feature

is standard in all ARO industrial pumps. Material is delivered to the

pump discharge outlet on both the up and down stroke.

The motor is connected to the lower pump end by a spacer section.

This allows for lubrication of the upper packing gland and prevents

motor contamination because of normal wear and eventual leak-

age through the material packing gland. Be sure the solvent cup is

adequately fi lled with lubricant to protect the upper packings and

insure longest service life.

HAZARDOUS PRESSURE. Do not exceed maxi-

WARNING

mum operating pressure of 4629 p.s.i. (319.2 bar) at 150

p.s.i. (10.3 bar) inlet air pressure.

Pump Ratio X

Inlet Pressure to Pump Motor

Pump ratio is an expression of the relationship between the pump motor area

and the lower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure

is supplied to the motor of a 4:1 ratio pump, it will develop a maximum of 600

p.s.i. (41.4 bar) fl uid pressure (at no fl ow) - as the fl uid control is opened, the fl ow

rate will increase as the motor cycle rate increases to keep up with the demand.

Refer to general information sheet for additional

WARNING

safety precautions and important information.

NOTICE: Thermal expansion can occur when the fl uid in the mate-

rial lines is exposed to elevated temperatures. Example: Material

lines located in a non-insulated roof area can warm due to sunlight.

Install a pressure relief valve in the pumping system.

Replacement warning label (pn 92325) is available upon re-

quest.

TROUBLE SHOOTING

Pump problems can occur in either the air motor section or the

lower pump end section. Use these basic guidelines to help deter-

mine which section is aff ected.

Pump will not cycle.

Be certain to first check for non-pump problems including

kinked, restrictive or plugged inlet / outlet hose or dispensing

device. Depressurize the pump system and clean out any ob-

structions in the inlet / outlet material lines.

Refer to the motor manual for trouble shooting if the pump

does not cycle and / or air leaks from the air motor.

Damaged motor. Service the motor.

Pump cycles but does not deliver material.

Refer to the lower pump end manual for further trouble shoot-

ing.

Page 2 of 2

PUMP OPTION DESCRIPTION CHART

PACKING MATERIAL

3 - Glass fi lled PTFE

C - UHMW-PE

G - UHMW-PE / Leather staggered

SPRING ARRANGEMENT

4 - Multiple wave spring with stainless

steel balls

7 - Multiple wave spring with alternate

balls (hard stainless steel)

Maximum Pump

Fluid Pressure

(Packings are upper and lower unless noted)

P - UHMW-PE / Glass fi lled PTFE staggered (upper)

UHMW-PE (lower)

R - Glass fi lled PTFE / UHMW-PE staggered (upper)

Glass fi lled PTFE (lower)

PLUNGER TYPE

3 - Hard stainless steel with hard chrome plating

B - Hard stainless steel with ceramic coating

PUMP CONNECTION - UPPER / LOWER

NOTE: All threads are right hand.

Lay the pump assembly on a work bench.

Remove the three (Y85-29-C) nuts from the three spacer rods

(see fi gure 1).

Pull the air motor from the lower pump end until the motor

piston rod is in the "down" position and the lower pump end

rod is in the "up" position.

Using e-ring pliers, slide the retaining ring up far enough to

allow the sleeve to move upward and release the two connec-

tors (see fi gure 2).

PUMP CONNECTION DETAIL

REASSEMBLY

Align the pump motor with the lower pump end. Position the

air inlet of the motor 58° from the material outlet.

Install the two (90096) connectors and retain with the (90109)

sleeve. Slide the (90102) retaining ring back into position.

Reinstall the spacer rods to the pump motor.

Bring the motor and lower pump together and retain with

three (Y85-29-C) nuts.

ARO® is a registered trademark of Ingersoll-Rand Company

Pump Motor Piston Rod

90102 Retaining Ring

90109 Sleeve

90096 Connector (2)

Lower Pump Piston Rod

Figure 2

PN 97999-654

650485-XXX (en)