Archive for February, 2011

DEF and Urea Temperature Control

Diesel Exhaust Fluid (DEF) is a mixture of 32.5% urea and 67.5% deionized water.  DEF freezes at 12o F (-11o C), but low temperatures will not cause the DEF solution to degrade.  Regardless, it is recommended that DEF be stored at temperatures above its freezing point so it’s always ready for use. Methods for heating and maintaining temperature in large totes, tanks, and containers can best be achieved with a Powerblanket DEF Heater.

High temperatures is where we run into problems with DEF degradation.  High Temperature will cause DEF to break down and can limit its shelf life.  DEF begins to decompose into isocyanic acid (ammonia) at temperatures above 122o F (50o C).  Diesel-powered vehicles that utilize urea SCR systems require fresh, uncompromised DEF in order to work correctly.  In order to limit DEF decomposition during storage, it is recommended that it be kept between 23o F and 86o F (-5o C and 30o C) and that it be placed away from direct sunlight.

Shelf Life

Shelf Life is a function of Ambient Storage Temperature. Listed below is a chart outlining the guide for shelf life based on ISO 22241-3 specifications.


º F


º C

Minimum Shelf Life

< 50º F < 10º C 36 months
< 77º F < 25º C 18 months
< 86º F < 30º C 12 months
< 95º F < 35º C 6 months

Q & A

Q. How do I keep the DEF from freezing and what happens if the DEF freezes in the tank on my vehicle?
A. During vehicle operation, SCR systems are designed to provide heating for the DEF tank and supply lines. If DEF freezes when the vehicle is shut down, start up and normal operation of the vehicle will not be inhibited. The SCR heating system is designed to quickly return the DEF to liquid form and the operation of the vehicle will not be impacted. The freezing and unthawing of DEF will not cause degradation of the product.
Q. Does DEF expand when frozen?
A. Yes, DEF expands by approximately 7% when frozen. DEF packaging and tanks are designed to allow for expansion.
Q. How much DEF will a truck consume?
A. DEF consumption is expected to be approximately 2% of fuel consumption, depending on vehicle operation, duty cycle, geography, load ratings, etc.
Q. What is the number of miles a truck can expect to travel on one gallon of DEF?
A. DEF consumption is directly related to fuel consumption.  A truck averaging 6 MPG can expect to go approximately 300 miles on one gallon of DEF.
Q. How can an operator determine how much DEF they will need/use?
A. DEF consumption will be approximately 2% of the diesel fuel consumed. Another way to consider it is that DEF will be consumed on a 50 to 1 ratio with diesel. (For every 50 gallons of diesel fuel burned, you will use 1 gallon of DEF).  If you know the average fuel consumption of a vehicle, you can easily calculate the amount of DEF that will be used.
Q. Is the DEF dose rate the same for all engine manufacturers?
A. The DEF dose rate will vary slightly amongst engine manufacturers. While most engines will have a dose rate of 2 percent of diesel fuel consumed, the dose rate will range from 1 percent to 3 percent.
Q. What happens if the vehicle runs out of DEF?
A. Vehicles that use DEF will have indicators on the dash that will alert the driver of the quantity of DEF on board. A gauge similar to a fuel gauge will indicate the level of DEF. There will be a DEF low level warning lamp that will illuminate when DEF is low. If the vehicle is operated such that one would run completely out of DEF, vehicle power will be reduced enough to encourage the operator to refill the DEF tank. Once the tank has been refilled the engine will resume normal power levels
Q. What is the recommend solution for temperature control of DEF at refilling stations and storage facilities?
A. Powerblanket DEF Temperature Control Shelters!

Grease Keg Heaters That Really Deliver

Grease, oil, hydraulic fluids and other petroleum products require viscosity control regardless of season.  Pumping cold grease is an impossible task.  Ask any lube shop or  mechanic.  Without a method for efficiently heating petroleum products during cold weather, mother nature wins the battle every time.

Grease kegs, oil drums and a host of other viscous materials benefit greatly from the heating properties of GreenHeat Technology used in Powerblanket® products. Engineered with a patented heat spreading material, Powerblanket, LLC manufactures a complete line of heated wraps for drums, barrels, buckets and totes.  Powerblanket heaters even the playing field and allow temperature control to proceed without delay.

  • Heat, insulate and protect materials year round
  • Works on both metal & poly drums and pails
  • Best solution for viscosity & flow control
  • Heat propane and other compressed gases
  • Maximum freeze protection to -40F/-40C
  • Insulated full wrap design – keeps heat in & cold out
  • Safe on a wide variety of materials
  • Certified to UL/CSA safety standards
  • New Rapid-Ramp 2x heat technology available on select models
  • Adjustable thermostat options for pinpoint temperature control

Grease Keg Heater (BH15-PRO)

L.K. Goodwin


Ice Dam Melting

BOSTON, MA – Ice Dam Melting and Removal Discussed. Powerblanket® Extra-Hot (EH) outdoor electric blankets provide rapid heat to troublesome ice dams, parking lot snow, driveway ice, and other snow covered areas. Powerblanket products and their all-in-one heating solution provides a barrier of heat to help melt snow, ice, and thaw frozen ground at home or on the job by using a standard 120V 20amp plug to provide power to the heater.

Ice dams and frozen gutters are caused when large amounts of ice forms at the edge of the roof, thus trapping any snow on the roof behind it. With nowhere to go, the snow and water become trapped and will begin piling up on your roof, eves, and entryways.  If ice dams have formed at the eaves of your roof you should immediately take measures to melt the ice enough to let any trapped water flow away.

Powerblanket products are is a UL/CSA approved and use GreenHeat Technology to provide low cost heating to almost any surface area including troublesome ice dams and roof snow.  Designed originally for ground thawing and concrete curing, Powerblanket brand products provide heating solutions for almost any outdoor setting.

Rapid thawing and heating can now be achieved without the hassles of tents, blowers, chemicals, or open flames. The Powerblanket Extra-Hot line of heated blankets are lightweight, portable, and a favorite among contractors and home owners alike.

Powerblanket, LLC can be reached online at or by contacting them by phone at 877-927-6432 for more information on their complete line of ice dam melting blankets.

  • Portable, Lightweight Heating Solution
  • Easy to install, uninstall, and reinstall
  • Extra-Hot (EH) model for fast thawing
  • Quickly melt ice dams & frozen gutters
  • Prevent snow & ice buildup
  • Eliminate roof leaks and damage
Multiple Sizes to Choose From

Multiple Sizes to Choose From