GURU® DL2.1

475-001110-035

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The GURU® DL 2.1 is the most widely used and proven locomotive freeze protection valve in the world. It may be thought of as an automatic freeze-out plug with one important difference: The stainless steel GURU® Cartridge releases itself from its body at a pre-set water temperature (35°F or 40°F), rather than being forced out by the tremendous pressure of expanding ice. This provides almost a full one inch bore to rapidly drain the typical locomotive before damage can occur. Resetting and rearming the GURU® Plug is easily accomplished by simply reheating the cartridge and utilizing our GURU® Flag and Clip tool with slotted actuator feature. This feature prevents the GURU® Plug from triggering open again while refilling the cooling system with cold water.
  • Locomotive engine and compressor set cooling systems
  • Stand-by diesel heating circulators
  • Back-up protection in event of shut-down
  • Hot water cab heater lines
  • On-board tanks and piping
  • Thermal actuator sensing surface is the only wetted part
  • Long service life: All moving parts are stainless steel
  • Design excludes cooling water chemicals and other debris from moving parts
  • Several body styles available for various applications: 1-1/4 NPT, tee, and flanged tee
  • Paint mask minimizes accidental paint-ins
  • Knob on cartridge for easy installation and removal even in hard to reach locations
  • Choice of release temperatures: 35°F or 40°F
  • Extra port for temperature bushing
  • Will not trip or dump while locomotive is running
  • Fully automatic - it never forgets to activate freeze protection
  • Completely mechanical - No electrical or air connections required
  • Not affected by air flow or air temperature - releases only when cooling water reaches set-point
  • Rapid draining
  • Easy system refill
  • Easy maintenance and field tested
  • Slotted actuator feature prevents nuisance dumps when refilling cooling system with cold water
  • Unit automatically rearms after filling and reheating
  • Optional domed anti-tamper cap eliminates ability to tamper with the valve resetting stem
  • Self-operating, no power or signal required
Series TYPE-S 35°F: ANTI- TAMPER
Description TYPE-S 35°F: ANTI- TAMPER
Opening Temperature 35°F (1.7°C)
Closing Temperature 45°F (7°C)
Body Material Stainless Steel
Release Temperature 35°F
Isometric View Download
Front View Download
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