Featured Product

March 2013

**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

July 2012

New items available from National-Spencer.

July 2011

Diesel Exhaust Fluid (DEF)

What is DEF :

• Diesel Exhaust Fluid (DEF) is an organic non- toxic compound made of 32.5% urea and 67.5 % de-ionized water.
• DEF helps to convert NOx into Nitrogen gas and water vapors. It is stable, colorless, odorless, and meets accepted international standards for purity and composition.
• DEF is carefully regulated by the American Petroleum Institute & is mandatory on all Diesel motors built after Jan 2010.

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:

• 2.5 Gal of DEF will yield over 800 miles
• DEF estimated usage rate is approximately 2% per gallon of fuel.

Where is DEF injected:

• It can not be mixed with the Fuel.
• It is injected in the exhaust pipe just before a special exhaust converter.

July 2010