**UPDATES** National Spencer, Inc. has recently made a few updates to the site. See below for more information...
New Products Added:
Electric Fuel Pumps: Model 925, Model 930, & Model 945
Electric DEF Pump: Model 9115
Rotary Fuel Pumps: Model 1006, Model 1006H, & Model 1006HFM
Hand Oil Pumps: Model 353
New items available from National-Spencer.
Diesel Exhaust Fluid (DEF)
What is DEF :
How will temperature affect DEF:
At temperature below 12º F (at which DEF will Freeze) trucks will be operational (with limited mileage and speed) until the DEF tank-thawing process is complete by the on board computer & heater.
There is no concern regarding thermal stress with the plastic DEF tank. Tanks have been extensively tested in a variety of extreme climates.
DEF, when heated and maintained at a temperature above 120 degrees Fahrenheit will very slowly start to form small amounts of ammonia. It would take over two years at this constant temperature to convert DEF into a level of what household ammonia is.
How many miles will a tank of DEF last:
Where is DEF injected: