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The Guru® DL 2.1 thermostatic valves respond to engine coolant temperatures. When the locomotive is shut down and the cooling water temperature drops to the valve's set point, (Standard offerings: 35ºF or 40ºF) the valve cartridges will release, draining the locomotive cooling system before any freeze damage occurs.

After a drain occurrence, the valve cartridges can be heated and reinserted back into the hex nut to refill the water tank and promptly return the locomotive to service.
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Type-S Standard Plug Locomotive Freeze Protection Thermostatic Valve

Guru® DL 2.1 Type-S Standard Plug and 35 Degree Fahrenheit (ºF) Temperature Locomotive Freeze Protection Thermostatic Valve
Type-T Tee Body Locomotive Freeze Protection Thermostatic Valve

Guru® DL 2.1 Type-T Tee Body and 35 Degree Fahrenheit (ºF) Temperature Locomotive Freeze Protection Thermostatic Valve
Type-FL Locomotive Freeze Protection Thermostatic Valve

Guru® DL 2.1 Type-FL and 35 Degree Fahrenheit (ºF) Temperature Locomotive Freeze Protection Thermostatic Valve
Type-FL/FL-GX Locomotive Freeze Protection Thermostatic Valve

Guru® DL 2.1 Type-FL-GX and 35 Degree Fahrenheit (ºF) Temperature Locomotive Freeze Protection Thermostatic Valve
Type-S Standard Plug Locomotive Freeze Protection Thermostatic Valve

Guru® DL 2.1 Type-S Standard Plug and 40 Degree Fahrenheit (ºF) Temperature Locomotive Freeze Protection Thermostatic Valve
Description N/A The Guru® DL 2.1 thermostatic valves respond to engine coolant temperatures. When the locomotive is shut down and the cooling water temperature drops to the valve's set point, (Standard offerings: 35ºF or 40ºF) the valve cartridges will release, draining the locomotive cooling system before any freeze damage occurs.

After a drain occurrence, the valve cartridges can be heated and reinserted back into the hex nut to refill the water tank and promptly return the locomotive to service.
Brands N/A ThermOmegaTech®
Type N/A Type-S Standard Plug N/A Type-T Tee Body N/A Type-FL N/A Type-FL-GX N/A Type-S Standard Plug
Cartridge N/A 481-04-82-CART N/A 481-04-82-CART N/A 481-04-82-CART N/A 481-04-82-CART N/A 481-04-81V-CART
Temperature N/A 35 ºF N/A 35 ºF N/A 35 ºF N/A 35 ºF N/A 40 ºF
Available Options N/A GURU® DL 2.1 plugs are available in various configurations, including in a tee or cross body, with different flange styles such as grooved flanges and gasket seals, flat-faced flanges, or a combination of both.