Pump Option Description Chart

650484-X X

PACKING MATERIAL

(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)

Glass filled PTFE

P UHMW-PE / PTFE staggered (upper)

UHMW-PE

UHMW-PE (lower)

PLUNGER TYPE

UHMW-PE / Leather staggered

R PTFE / UHMW-PE staggered (upper)

PTFE (lower)

PACKING MATERIAL

SPRING ARRANGEMENT

PLUNGER TYPE

Multiple Wave Spring w/

3 Hardened Stainless Steel w/

316 Stainless Steel Balls

Hard Chrome Plating

Multiple Wave Spring w/

B Hardened Stainless Steel w/

440 Stainless Steel Balls

Ceramic Coating

GENERAL DESCRIPTION

WARNING HAZARDOUS PRESSURE. Do not exceed maxi- mum operating pressure of 3300 p.s.i. (228 bar) at 150 p.s.i. (10.3 bar) inlet air pressure.

PUMP RATIO X	=	MAXIMUM PUMP
INLET PRESSURE TO PUMP MOTOR	=	FLUID PRESSURE

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 6:1 ratio pump it will develop a maximum of 750 p.s.i. (52 bar) fluid pressure (at no flow) - as the fluid control is opened, the flow rate will in- crease as the motor cycle rate increases to keep up with the demand.

WARNING Refer to general information sheet for additional safety precautions and important information.

ξThe Two-Ball pumps are primarily designed for the pumping of me- dium viscosity fluids, Stainless Steel construction offers compatibili- ty 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 dis- charge outlet on both the up and down stroke.

ξThe 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 leakage through the material packing gland. Be sure the solvent cup is ade- quately filled with lubricant to protect the upper packings and insure longest service life.

TROUBLE SHOOTING

Pump problems can occur in either the Air Motor Section or the Lower Pump End Section, use these basic guidelines to help determine which section is affected.

If the pump will not cycle.

ξBe certain to first check for non-pump problems including kinked, re- strictive or plugged inlet / outlet hose or dispensing device. Depres- surize the pump system and clean out any obstructions in the inlet / outlet material lines.

ξRefer to the motor manual for trouble shooting if the pump does not

cycle and / or air leaks from the air motor.

If the pump cycles but does not deliver material.

ξRefer to the lower pump end manual for further trouble shooting.

PUMP CONNECTION - UPPER / LOWER

NOTE: All threads are right hand.

1.Lay the pump assembly on a workbench.

2.Remove the three nuts from the three spacer rods. (Fig. 1)

3.Pull the air motor from the lower pump end until motor piston rod is in the “down” position and lower pump end rod is in “up” position.

4.Using e-ring pliers, slide the retaining ring up far enough to allow the sleeve to move upward and release the two connectors. (Fig. 2)

PUMP CONNECTOR DETAIL

Pump Motor

Piston RodRETAINING RING

90102

FIGURE 2	SLEEVE
	90109
Lower Pump	CONNECTOR
Piston Rod	90096 (2)

REASSEMBLY

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

2.Install the two connectors and retain with the sleeve, slide the retain- ing ring back into position.

3.Reinstall the spacer rods to the pump motor.

4.Bring the motor and lower pump together and retain with the three nuts.

PN 97999-653

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