AIR AND LUBE REQUIREMENTS
WARNING EXCESSIVE AIR PRESSURE. Can cause pump damage, personal injury or property damage.
A filter capable of filtering out particles larger than 50 microns should be used on the air supply. There is no lu- brication required other than the “O” ring lubricant which is applied during assembly or repair.
If lubricated air is present, make sure that is compatible with the Nitrile “O” rings in the air motor section of the pump.
OPERATING INSTRUCTIONS
Always flush the pump with a solvent compatible with the material being pumped if the material being pumped is subject to “setting up” when not in use for a period of time.
Disconnect the air supply from the pump if it is to be inactive for a few hours.
The outlet material volume is governed not only by the air supply but also by the material supply available at the inlet. The material supply tubing should not be too small or restric- tive. Be sure not to use hose which might collapse.
When the diaphragm pump is used in a
Secure the diaphragm pump legs to a suitable surface to in- sure against damage by vibration.
MAINTENANCE
Refer to the part views and descriptions as provided on page 4 through 7 for parts identification and Service Kit information.
Certain ARO “Smart Parts” are indicated which should be available for fast repair and reduction of down time.
Service kits are divided to service two separate dia- phragm pump functions: 1. AIR SECTION, 2. FLUID SEC- TION. The FLUID SECTION is divided further to match typical part MATERIAL OPTIONS.
Provide a clean work surface to protect sensitive internal moving parts from contamination from dirt and foreign matter during service disassembly and reassembly.
Keep good records of service activity and include pump in preventive maintenance program.
Before disassembling empty captured material in the outlet manifold by turning the pump upside down to drain material from the pump.
FLUID SECTION DISASSEMBLY
1.Remove top manifold(s).
2.Remove (22) balls, (19 and 33) “O” rings and (21) seats.
3.Remove (15) fluid caps.
NOTE: Only PTFE diaphragm models use a primary dia- phragm (7) and a backup diaphragm (8). Refer to the auxil- iary view in the Fluid Section illustration.
For
4.Remove (7) diaphragm, (5) washers and (30) shims. For other models:
4.Remove (6) nut, (7) or (7 / 8) diaphragms and (5) washers.
5.Remove (3 and 4) “O” rings.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
FLUID SECTION REASSEMBLY
Reassemble in reverse order.
Clean and inspect all parts. Replace worn or damaged parts with new parts as required.
Lubricate (1) diaphragm rod and (2) “O” ring with
Use ARO PN /
For
Attach a regulated airline to the pump inlet; gradually in- creasing the air pressure
Fasten (7) diaphragm with (5) washer into (1) diaphragm rod, and insert them into (101) Center body from the
chamber identified with blowing air in the previous step.
Install (15) fluid cap.
Thread the other side of (7) diaphragm with (5) washer into (1) diaphragm rod, but do not tighten it.
Record the angle for the misalignment between (7) dia- phragm hole and (101) center body holes, then unthread the (7) diaphragm and place proper Qty. of (30) shims between (5) washer and (1) diaphragm rod.
Attach a regulated airline to the pump inlet, gradually increasing the air pressure
Install the second (15) fluid cap.
Note: for details, refer to service kits manual 48495949. For other models:
Be certain (7) or (7 / 8) diaphragm(s) align properly with (15) fluid caps before making final torque adjustments on bolt and nuts to avoid twisting the diaphragm.
For models with PTFE diaphragms: Item (8) Santoprene diaphragm is installed with the side marked “AIR SIDE” to- wards the pump center body. Install the PTFE Diaphragm with the side marked “FLUID SIDE” towards the fluid cap.
Fluid Side
Air Side
Air
Side
Fluid
Side
CROSS SECTION VIEW OF DIAPHRAGMS (Refer to gure 3, page 5)
3 | 1 |
|
5 |
| 8 |
7 |
| 6 |
2 | 4 |
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Torque Sequence | Figure 2 | |
(Refer to gure 3, page 5) | ||
Viton® and Hytrel® are registered trademarks of the DuPont® | Company. Kynar® is a registered trademark of Penwell Corp |
Santoprene® is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P. | |
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