Watchdog® Oil Dryers are a passive drying system designed for bearing housings and other applications, where moisture condensation must be minimized. Relative humidity is substantially reduced in most applications. The compact design and standard thread size are designed to simplify installation. Standby equipment can be protected from internal moisture damage when the Watchdog® Oil Dryer is installed.
Description
Watchdog® Oil Dryers contain a 1″ NPT port for easy installation on ANSI and API pumps
Desiccant cartridges change from orange to dark green color to indicate when replacement is required
Cartridge replacement is simple and takes less than one minute
Engineered polymer provides high temperature rating and excellent corrosion resistance
Multiple purpose – serves as a viewport, a fill port and an oil dryer
Models
Model No.
Description
Material
Style
Connection
31807
Oil Dryer
Polysulfone
With Viewport
1 NPT
31808
Oil Dryer
Polysulfone
Without Viewport
1/2 NPT
31848
Oil Dryer
Metal/Glass
With Viewport
1 NPT
31849
Oil Dryer
Metal/Glass
With Viewport & Wire Guard
1 NPT
Replacement Cartridges
The Watchdog® Oil Dryer Replacement Cartridges are used with Watchdog® Oil Dryers. When the orange silica gel has turned dark green, remove fitting from the bottom of desiccant cartridge, dispose of the spent dark green desiccant cartridge, then replace with new cartridge.
Passive Oil Dryers 
