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  • Belt width 122 to 213 cm (48” to 84”)

  • Heat chamber length 183 cm (72”)

  • CoolSkin™ technology

Guardian® II, the industry's most efficient, innovative, and affordable high-production graphic gas screen printing conveyor dryer, is available in belt widths from 122 to 213 cm (48" to 84"). Not only does it have the highest production capacity in its class, it’s also the most energy efficient. Heavy-duty thermal insulation prevents heat from migrating into the workplace; CoolSkin™ technology leaves the dryer skin cool to the touch; and exhaust gasses heat incoming air. Fast cure rates and high product throughput maximize dryer capacity and minimize per-unit cost.

Available in liquid propane (LP) or Natural Gas (NG), the high-performance burners are designed with excess capacity that far exceeds consumption rates under normal operating conditions. Separate blowers control combustion, circulation, and exhaust. A high-volume forced air system quickly brings the chamber to the desired temperature, speeding the start of production. Process temperatures and set temperatures are controlled digitally. Temperature consistency is ensured by a fuzzy-logic controller, which responds to ambient temperature changes by keeping chamber heat within 1° of target temperature at the thermocouple. A tower light shows when temperatures are within user-set parameters. When readings fall outside those settings, a temperature monitor issues visible and audible alarms.

Guardian II features M&R’s Teflon-coated fiberglass Patriot Belt™ with the SureTrak™ roller system (U.S. Patents Pending: SN 15194035 & 15265538). The red flexible bead stitched along one edge of the Patriot Belt rides in grooves machined into the large anodized aluminum SureTrak rollers. It’s the most precise dryer belt tracking available. Entry and exit openings are adjustable. Digital speed readout makes it easy to duplicate settings. M&R’s automatic shutdown sequence keeps the blower and belt running until the chamber has cooled. Guardian II options include high speed conveyors; split belt conveyors with independent variable speed drives and direction; Switchback™ & Vitran II™ UV Curing Modules; and ambient air and refrigerated air cooling units.

Resources & Specs

Product Brochure

Belt Width 122 cm (48")
Burner Input Maximum 400 000 Btu
Burner Width 217 cm (85.5”)
Electrical Requirements 208/230V, 3 ph, 20/18 A, 50/60 Hz, 8 kW
50 Hz, 8 kW
Electrical Requirements for Optional 61 cm (24”) Radiant Section
Exhaust Blower System 25 cm (10"): 50 970 l/min (1800 cfm) @ 6 mm (1/4")
Expansion Heat Modules 61 cm (24")
Gas Input Size 2.54 cm (1")
Heat Chamber Length 183 cm (72”)
Heat Chamber Width 160 cm (63")
Infeed/Outfeed Length (Standard) 122 cm (48”)
LP/Natural Gas Input Pressure .93 mm Hg (5" w.c.)
Overall Length 427 cm (14’) or more
Shipping Weight 1588 kg (3500 lb)
Standard Features

AIR HANDLING

  • Blowers hold down even the lightest substrates
  • Enhanced airflow accelerates drying/curing
  • Exhaust Blower evacuates up to 50 970 l/min (1800 cfm)
  • Heat efficiency system reduces operating expenses by using outgoing combustion gas to heat incoming air
  • High-volume circulation blower reduces energy costs
  • Stainless steel filter slides out for easy cleaning
  • Three separate dedicated blowers (combustion, circulation & exhaust)
CERTIFICATION
  • CE Certified: Built to specifications established by the European Committee for Standardization® (CE)
  • CSA Certified: Built to specifications established by the CSA Group (models sold in Australia are AGA Certified: Built to specifications established by the Australian Gas Association)
  • UL Listed: Built to specifications established by Underwriters Laboratories® (UL)
CONTROL CENTER
  • Automatic shutdown sequence keeps the blower and belt running until the dryer chamber has cooled
  • Control panel rotates for visibility and access
  • Digital keypad with digital display
  • Temperature monitor issues visible and audible alarms when readings fall outside user-specified parameters
  • Tower light indicates when temperatures are within user-set tolerances
CONVEYOR SYSTEM
  • Conveyor dryer belt is made of heat-resistant, Teflon®-coated fiberglass
  • Digital belt speed readout makes it easy to duplicate conveyor dryer speed settings
  • Driven by a reliable, heavy-duty, variable-speed DC motor
  • Large anodized aluminum rollers are crowned for positive belt tracking
  • Patriot Belt™ with the SureTrak™ roller system features a heat-resistant, Teflon®-coated fiberglass belt with a red flexible bead stitched along one edge that rides in grooves machined into the large anodized aluminum rollers, providing the most precise belt tracking available (U.S. Patents Pending: SN 15194035 & 15265538)
  • Standard belt speed: 91 to 1554 cm (3’ to 51’) per minute
DESIGN & CONSTRUCTION
  • Adjustable infeed and outfeed openings
  • Air-cooled cabinet ensures long life for electrical components
  • Bearings are designed for high speeds and high temperatures
  • Circuit breakers allow easy reset
  • Low-profile design makes it easier to see over the screen printing dryer
  • Modular design and specialized fasteners make it easy to attach additional heat chamber units
ENERGY EFFICIENCY
  • Burners are designed with excess capacity that far exceeds consumption rates under normal operating conditions
  • CoolSkin™ technology leaves the conveyor dryer skin cool to the touch
  • Fast curing rates and high product throughput maximize conveyor dryer capacity and minimize per-unit cost
  • Fuzzy-Logic controller ensures consistency by keeping dryer chamber heat within 1° of target temperature at the thermocouple
  • Guardian II is the most energy-efficient dryer in its class
  • Heavy-duty thermal insulation prevents heat from migrating from the conveyor dryer into the workplace
  • Pressurized vector air knives provide consistent and uniform temperatures throughout the drying chamber
  • Process temperature and set temperature are displayed and controlled digitally
HEAT CHAMBER
  • Burners are available for liquid propane (LP) or natural gas (NG)
  • Direct-fired burner is maximum-rated at 400 000 Btu
  • Double-wall construction
  • Galvanized steel interior
  • Interior air distribution system ensures uniformity and consistency of temperature
  • Modular gas train simplifies maintenance
PRODUCTIVITY
  • Guardian II has the highest production capacity in its class
WARRANTY, SERVICE AND SUPPORT
  • 24-hour hotline is staffed 365 days a year
  • Access to M&R’s Training Center
  • One-year limited warranty

 

Options

AIR HANDLING

  • AC variable-speed circulation blower
CONVEYOR SYSTEM
  • Available with conveyor speeds faster than the standard rates listed
  • Conveyor extension sections are available in 30 cm (12") increments
  • Split-belt model with independent drives features reversible direction and variable speed
COOLING
  • Ambient air and refrigerated air cooling units
HEAT CHAMBER
  • 61 cm (24”) infrared pre-heat module speeds throughput
  • Additional 61 cm (24") conveyor dryer sections are available
UV CURING MODULES
  • Switchback™
  • Vitran II™