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MARO OPERATING MANUAL
3" MARO MA Series Metallic DIAPHRAGM PUMP
READ THIS MANUAL CAREFULLY BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT. It is the responsibility of the employer to
place this information in the hands of the operator. Keep for future reference. Failure to comply with the recommendations stated in this
manual can cause serious injury, damage the pump and void factory warranty.
PUMP DATA
Maximum Capacity:
Air Inlet Connection:
Fluid Inlet/Outlet Connection:
Max. Working Pressure:
Suspended Solids Max. Dia.:
Max. Dry Suction Lift:
Shipping Weight:
Optimum
Compound
Temperature
10 to 54 ͦ C
Neoprene
50 to 130 ͦ F
10 to 60 ͦ C
Buna-N
50 to 140 ͦ F
10 to 100 ͦ C
Santoprene
50 to 212 ͦ F
10 to 100 ͦ C
PTFE
50 to 212 ͦ F
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
890 l/min (236 gpm)
¾" BSP (F)
3" BSP (F) or NPT (F)
8.3 bar (120psi)
9 mm (3/8")
5.8 m (19 ft)
50 Kg (110 lbs) AL Pump
97 Kg (213 lbs) CI Pump
101 Kg (223 lbs) SS Pump
Main Applications / Chemical Compatibility
General purpose diaphragm
(non-aggressive applications -- water-based slurries, well water or sea
water)
Petroleum/oil-based fluids (leaded gasoline, fuel oils, non-synthetic
hydraulic oils, kerosene, turpentine, motor oils)
Lower cost alternative to PTFE in many acidic and caustic applications
such as sodium hydroxide, sulfuric or hydrochloric, At a cost comparable
to neoprene.
Aggressive chemicals and solvent but low abrasion resistance
RELEASED:
1.4.2021
1
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Table of Contents
Summary of Contents for Maro MA Series
- Page 1 RELEASED: 1.4.2021 3” MARO MA Series Metallic DIAPHRAGM PUMP READ THIS MANUAL CAREFULLY BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT. It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference. Failure to comply with the recommendations stated in this manual can cause serious injury, damage the pump and void factory warranty.
-
Page 2: General Description
BEFORE using or servicing your pump, please make sure to wear the proper clothing, eye protection and follow standard safety procedures when handling corrosive or personally harmful materials. To avoid danger and risk to yourself and others always use only genuine MARO parts. warning Fire or explosion can result when handling flammable liquids. -
Page 3: Identification Code
It always good to have lubricated air (lubrication oil must be SAE 5 or 10 with just 10 minutes a drop) If lubricated air is present, make sure that it is compatible with the O-rings and seals in the center section of the pump ... -
Page 4: Pump Curve
PUMP CURVE PARTS LIST... - Page 5 FLUID PART LIST...
- Page 6 FLUID SECTION DISASSEMBLY Remove (61) top manifolds Remove (22) balls, (19) O – rings and (21) seats. Remove (15) Fluid Chamber NOTE: Only PTFE diaphragm use a primary diaphragm (7) and a backup diaphragm (8). Refer to the auxiliary view in the Fluid Section illustration Remove (14) screw, (6) washer, (7) or (7/8) diaphragms and (5) washers NOTE: Do not scratch or mar the surface of (1) Shaft...
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Page 7: Troubleshooting
AIR MOTOR SECTION SERVICE Service is divided into two parts: 1. Pilot Valve, 2 Major Valve Air Motor section service is continued from Fluid Section repair Inspect and replace old parts with new parts as necessary. Look for deep scratches on metallic surfaces, and nicks or cuts in O rings ... -
Page 8: Dimensional Data
Failure due to normal wear and tear, improper storage or handling, un-authorized modification, misapplication or abuse is specifically excluded from this warranty. MARO Pump shall not be liable for any and all consequential damage or expense arising from the use or misuse of its products. In any and all events, manufacturer’s liability shall not exceed the purchase price of the product and/or accessories.
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