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Fluid Conditioning Services with Pall Fluid Purifiers

From the Leader in Contamination Control-Products For Hydraulic, Fuel and Lube Systems - R.W. Davisí fluid conditioning services remove water, air and solid contaminants from Hydraulic lube, transformer and circuit breaker oils or other service fluids compatible with the unitís seals and having a flashpoint of 200 degrees F or above.

HVP 902 HVP Series Portable Oil Purifier - The Pall HVP Portable Fluid Purifier extends fluid life, reduces disposal costs, minimizes waste and increases equipment uptime. In one package - a compact, economical, easy-to-use fluid purification system for removing water, particulate and gaseous contamination from hydraulic, lubrication and transformer oils.

Pall Fluid Purifiers were first introduced in 1965 responding to industry's concern regarding water contamination within hydraulic systems. Today the Pall HVP Portable Fluid Purifier is used as support equipment for the power generation, primary metals, pulp and paper, and light industrial markets. This rugged and dependable purifier provides extensive cost savings and improved equipment operation.

The immediate and long-term benefits are:

Reduced system wear
  • Less frequent component changes are required
  • Smaller spare parts inventory can be maintained
Improved system performance
  • Fewer costly operational delays
  • increased system reliability
Improved on-line performance
  • Less downtime resulting from service interruptions
Extended fluid life
  • Sharply reduced oil change out due to contamination; extended oil change intervals
Reduced fluid disposal costs and environmental risk
  • Sharply reduced need to transport contaminated fluids for disposal
  • Helps to minimize waste oil disposal costs


Problems associated with fluid contamination
Problems caused by water - The presence of both free and dissolved water in oil breaks down the oil through reduced lubricity, oxidation and acid formation. Oil that is free of water has a reduced tendency to oxidize and form organic acid, even when exposed to high temperatures. The presence of organic acid compounds leads to corrosion. Water accelerates fluid thermal degradation with production of particles or carbonaceous material. The presence of water also causes the polymerization of oil, forming larger molecules. Polymerization results in viscosity change, generation of solids harmful in terms of clogging of orifices and abrasive wear to system components.

In short, water-contaminated oil introduces many disadvantages with no benefits. It attacks the system by causing:
  • Fluid breakdown, such as additive precipitation and oil oxidation
  • Reduced lubricating film thickness
  • Accelerated metal surface fatigue
  • Corrosion
  • Jamming of components due to ice crystals formed at low temperature
  • Loss of dielectric strength in insulating fluids

Water removal - In the same way that air is said to have 100% relative humidity when it contains all the water vapor it can hold, oil is said to be saturated when it contains all the dissolved water it can hold. Any increase in water level above this point results in water droplets suspended in the oil. Thus, water can exist in oil in two forms: (1) dissolved water (up to the saturation point) and (2) free water (above the saturation point). Free water contained in oil tends to collect In low spots and low flow branches in the system, as well as plate out in close tolerance components. Such water will cause corrosion if not removed.

Problems caused by air - All fluids contain dissolved air and other gases, and may also contain some free air. There are many ways that air can enter the low pressure side of working systems. It can enter through lines that are disconnected to remove or install components, through entrainment from poor reservoir design, through ground support equipment, through improper maintenance procedures such as failure to fill filter bowls with oil when replacing filter elements, or through a rod seal of an actuator cylinder that IS leakinq. Despite the most rigorous bleed procedures, air can remain trapped in the system.

Trapped air can cause many problems, damaging both fluid and system components. It can cause poor system response due to variations in system pressure. Air will also cause erosion and pump cavitation. Air can accelerate hydraulic and lube oil oxidation and cause loss of insulation properties in dielectric fluids.

Air removal - The HVP Portable Fluid Purifer removes 100% of free (entrained) air and up to 75% of dissolved air. Air is removed when the fluid passes through the partially evacuated tower. Other gases are reduced down to trace amounts depending on recirculation time.

Problems caused by solids - Solid particulate contamination in fluids can damage system components severely. Left to recirculate in a fluid system, 1 to 5 micron contaminants or "silting" particles act as a lapping compound - grinding away surfaces of components... generating additional contamination...causing a chain reaction of wear.



R.W. Davs' Fluid Conditioner significantly reduces problems caused by particulates, water and air. - R.W. Davis' Fluid Conditioner is a complete and automatic unit. It typically provides the following levels of contamination control:

Contaminant Filtration Performance To:
Particulate Pall Cleanliness Code 13/12/10*
Free and dissolved water 100% free, 80% dissolved water removed
Free and dissolved air 100% free, 75% dissolved air removed

*When utilizing Pall, KZ Ultipor III Ŗ1>200



Does not alter fluid... just removes water and contaminants - Sine R.W. Davis' Fluid Conditioner does not us desiccants, high vacuum or high heat, it will not alter the physical or chemical properties of the treated fluid. Any other equipment using these processes could cause the following problems:
Purification Process Potential Problem
Desiccant Strips out fluid additives, generates hard particle contamination and requires monitoring to ensure that proper desiccant level is maintained.
High Vacuum Strips the fluid of light ends, changing its viscosity.
High Heat Causes fluid oxidation, coking or charring.




pdf file HVP 902 & HVP 2702 - .pdf file 2.39 mb

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