Graco 344834EN-A User Manual
Bellows Pumps
The Newest Technology in Piston Pumps
Merkur™ Bellows
The gentle pumping action of the
Merkur Bellows Pump, combined with
reduced sealing surfaces, provides
superior handling of shear-sensitive
materials, including UV coatings and
waterborne materials.
Applications
• Catalyzed coatings
• Varnish and lacquer
• High solid coatings
• Abrasive materials
• Solvent and waterborne materials
• Moisture-sensitive materials
• UV-cure coatings
• Flat line machine lines
• General finishing applications where open
wet cups are not preferred
Operator Control Panel
• Air controls located at operator height
for easy setting and monitoring
DataTrak
• Easy-to-set runaway protection
• Pump diagnostics for maintenance
• Resettable batch counter tracks material
usage and maintenance schedule
™
Time (1/1000 sec)
Merkur
Competitor
1800 2000 2200 2400 2600 2800 3000
M
C
Powerful Capabilities in a Unique Piston Pump
Merkur Air Motor Technology
• Highest technology air motor on the market
• Low air consumption for increased efficiency
• Simple air motor design and minimal parts
reduces repair time
Leak Proof Pump Lower
• Easy-to-flush design allows for fast color changes
and reduced material waste
• 300 series stainless steel pump construction
provides long-lasting durability
• Fewer parts and online replacement bellows seal
means improved serviceability, lower cost of
ownership and reduced downtime
1. Air Valve
Provides smooth and rapid changeover
2. Quick Removal Coupler
Allows for easy disassembly of the pump lower
from the air motor
3. Rotatable Inlet Fitting
Inlet can be rotated 360 degrees for
easy access
4. Improved Bellows Seal Design
Eliminates throat seal leakage and lubrication
5. Overflow Chamber (Optional)
D-shaped seal and overflow chamber
contains the material within the pump
in case of bellows leakage
Inlet Fitting
3
Bellows Seal
4
Overflow Chamber
Quick Removal Coupler
2
Less Pulsation
5
for Better Results
Merkur is designed to provide
a smooth, rapid changeover for
a better, more consistent finish
and less user fatigue.
1
Air Valve
6. Throat and Piston Packings
• Spring-loaded to maintain long packing
life – no adjustments needed
• Available with V-Packing seals for abrasives
or U-Cup seals for UV coatings
Packings
6
Quick changeover and recovery minimizes
M
pulsation and creates an even film thickness
C
Longer changeover and pressure spike creates
inconsistent finish
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