Information from industry experts

1. What is the detailed technical definition of MEHF performance ?  What pumps and conditions have been used to evaluate MEHF, and what are the results?
Click here for: Maximum Efficiency Hydraulic Fluids
M.E.H.F. 2005

2. How can you improve the value of your hydraulic fluid product line?  MEHF addresses the current trends in equipment design and offers a fast payback on the higher cost of this high performance fluid. 
Click here for: MEHF Performance Advantages
ILMA Forum, 2003

3. Reducing Energy Consumption with MEHF.  How does fluid viscosity affect pump efficiency, and what are the potential benefits?
Click here for: Reducing Energy Consumption with Multigrade Hydraulic Fluids

4. How much fuel or cost reduction is possible with MEHF?  Examples using vane pumps at typical operating conditions show savings of up to 20%, which are converted into Dollars/Euro/Yen when considering regional diesel fuel costs.
Click here for: Reducing Energy Consumption with Multigrade Hydraulic Fluids
Fuels & Lubes Asia Conference 2003

5. Pump efficiency can be modeled and therefore predicted for any operating temperature or pressure.  Pump efficiency is a function of viscosity and pressure, and the Poiseuille equation can be used determine pump flowrates if the viscosity/temperature profile of the fluid is known. Examples are given for a gear pump.
Click here for: Influence of Oil Viscosity and Pressure on the Internal Leakage of Gear Pump
STLE 2002

6. What other hydraulic fluid standards should be considered when selecting a MEHF.  A review of the major standards from North America/Europe/Japan that also define viscosity grades and fluid selection are summarized.
Click here for : Global Hydraulic Specifications Review
March 2002

7. Selecting the optimum hydraulic oil to meet the viscosity requirements of major pump manufacturers is a challenge.  MEHF can be used to meet the requirements of multiple OEMs due to a wider Temperature Operating Window.
Click here for: Selecting the Optimum Hydraulic Oil to meet the Viscosity Requirements of Major Pump Manufacturers.
Fuels and Lubes Asia Conference 2004
and
Click here for: Summary Presentation – STLE 2005.
STLE 2005

8. High VI fluids can show some loss of kinematic viscosity in service. A fluid formulated to meet the MEHF performance level will deliver a constant flow rate at all times, even over extended operating periods. This work documents MEHF flowrate stability in medium and high pressure pumps.
Click here for: IFPE 2005 MEHF Flow Stability.
IFPE 2005

9. The operating temperature of a hydraulic fluid is a function of system pressure and volumetric efficiency. The use of an MEHF can significantly reduce thermal stress on the fluid and reduce chances of overheating. This study presents a model to calculate the actual operating temperature of the oil in the pump, as well as the temperature increase of the oil as it passes through the pump.
Click here for: IFPE 2005 MEHF Temperature Control.
IFPE 2005

10. Collaborative work between Komatsu and RohMax has resulted in a paper
reviewing the performance of a variety of monograde and multigrade fluids
in a widely used high performance Komatsu piston pump. The results show a
significant advantage when using MEHF fluids, and provides support for the
MEHF technical performance level definition.
Click here for: FLAsia 2006 RohMax Komatsu Piston Pump.
FLAsia 2006

11. Efficiency Advantages in Vane, Piston and Gear Pumps - What High VI
Fluids Can Do For You!. A collective summary of pump efficiency work
conducted in a variety of controlled laboratory test stands, offering one
technical paper that demonstrates the performance value of MEHF fluids in
all pump types.
Click here for: IFK 2006 MEHF in Vane Piston Gear Pumps.
IFK 2006
Click here for: IFK 2006 MEHF in Vane Piston Gear Pumps PRES.
IFK 2006