Graco Inc.

Therm-O-Flow 20  Bulk Hot Melt System

For hot melt sealants and adhesives in 20 liter (5-gal) pails

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The Therm-O-Flow 20 is an industrial bulk hot melt system that is perfect for applications in low and high-flow settings. It offers improved throughput, better process monitoring and reliable, efficient operation.

Improve process efficiency

  • Keep your production runnnig with automatic electric crossover when using tandem units

Improve production capabililty

  • Smaller footprint lets you place unit near the application
  • Capable of melt rates up to 1.3 lb/min (0.6 kg/min)

Reduce energy costs

  • Inactivity shutoff and temperature setback reduces energy costs

Supply factory environment initiatives

  • Graco NXT Air Motors operate around 87 decibels while other comparable motors operate up to 103 decibels
Therm-O-Flow_ADM

Intuitive, easy to use controls

  • Displays actual and set point temperatures for up to 12 zones per unit
  • Material tracking and machine diagnostics can be downloaded to USB
  • Provides programmable preventative maintenance schedules
  • Languages supported: English, Spanish, German, French, Chinese, Japanese, Portuguese, Italian and Korean

Merkur & NXT Air Motor Technology

  • Provides quiet, reliabile, efficient operation
  • Proven Graco technology

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Therm-O-Flow 20 Hot Melt System
Air inlet size
1/2 npsm(f)
1/2 npsm(f)
Air motor sound data
See air motor instruction manual.
See air motor instruction manual.
Wetted Parts
carbon steel, brass, chrome, zinc, nickel plating, stainless steel (304, 316, 440, and 17–4 PH), alloy steel, ductile iron, PTFE
carbon steel, brass, chrome, zinc, nickel plating, stainless steel (304, 316, 440, and 17–4 PH), alloy steel, ductile iron, PTFE
Displacement pump effective area
Merkur and NXT
1.24 in²
8 cm²
President
0.884 in²
5.7 cm²
Volume per cycle
Merkur and NXT
11.7 in³
192 cm³
President
3.8 in³
62.3 cm³
Pump cycles per 1 gallon (3.8 liters)
Merkur and NXT
21
21
President
61
61
Ram maximum input pressure
Merkur and NXT
125 psi
0.85 MPA, 8.5 bar
President
120 psi
0.8 MPa, 8.3 bar
Maximum pump operating temperature
Merkur and NXT
400°F
204°C
President
400°F
204°C
Pump fluid outlet size
Merkur and NXT
1 in npt(f)
1 in npt(f)
President
1/2 in npt(f)
1/2 in npt(f)
Maximum Fluid Working Pressure
Merkur 6.0 in
2300 psi
15.9 MPa, 159 bar
Merkur 7.5 in
3000 psi
20.7 MPa, 207 bar
NXT 6500
3000 psi
20.7 MPa, 207 bar
President 4.25 in
1800 psi
12.6 MPa, 125 bar
Maximum Air Input Pressure (Pumps)
Merkur 6.0 in
100 psi
0.7 MPa, 7 bar
Merkur 7.5 in
82 psi
0.57 MPa, 5.7 bar
NXT 6500
43 psi
0.29 MPa, 2.9 bar
President 4.25 in
120 psi
0.8 MPa, 8.3 bar
Power Requirements
Compressed Air (typical)
25–50 scfm
25–50 scfm
Voltage (as selected)
220/240 V, 3-phase, 50/60 Hz
220/240 V, 3-phase, 50/60 Hz
380/400 V, 3-phase, 50/60 Hz
380/400 V, 3-phase, 50/60 Hz
470/490 V, 3-phase, 50/60 Hz
470/490 V, 3-phase, 50/60 Hz
575 V, 3-phase, 50/60 Hz
575 V, 3-phase, 50/60 Hz
Peak Consumption (includes drum melt grid, pump, and a 6kVa transformer for the 230 V hoses and accessories)
Standard melt grid platen with President pump
6.4 kVa
6.4 kVa
Standard melt grid platen with Merkur or NXT pump
8.7 kVa
8.7 kVa
Smooth melt grid platen with President pump
6.4 kVa
6.4 kVa
Smooth melt grid platen with Merkur or NXT pump
8.7 kVa
8.7 kVa