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The Hope Group

The Hope Group is an authorized full-line Parker distributor featuring hydraulic, pneumatic, fluid connector, and sealing products for OEM and MRO applications.

Sorensen Systems is a designer/builder of custom systems providing clean water, renewable energy sources, and technologically advanced process systems for industry.

Hope Air Systems is an authorized distributor for Kaeser Compressor featuring energy efficient rotary screw compressors as well as a designer/builder of skid-mounted packaged compressed air systems.

Hope Service can dispatch its field service fleet of vehicles and experienced, factory-trained technicians to provide emergency and routine field service to its hydraulic, electrical, and compressed air systems customers.

The Hope Group owns and operates eight Parker Stores at its branch locations providing "while you wait" replacement of hose assemblies and immediate on-hand access to 3,000 Parker fluid connector parts.

The Hope Group provides 24 hour access to $150 million of Parker parts through its eCommerce website,, offering one or two-day shipping of all your hose & fittings, hydraulic, pneumatic, valve, and filtration needs.

iPower Distribution Group of New England provides supply chain consulting and implementation through streamlined procure-to-pay process, vendor managed inventory (VMI), Kanban, and in-plant buyer-planner services.


Sorensen Systems Home › News from Sorensen Systems › Portable Purification Systems Solve Contamination Problems

Portable Purification Systems
Solve Contamination Problems

Water is one of the most common contaminants in a fluid system and one of the most damaging. When water contaminates a system, it can cause serious problems. Among the most serious problems are:

  • Fluid breakdown
  • Reduction of lubricating properties
  • Additive precipitation
  • Oil oxidation
  • Abrasive wear
  • Corrosion

There are a variety of so-called dryers that attempt to address the water contamination issue. A centrifuge unit can be used to remove water. But, it has some drawbacks; among them are it only removes free water, has difficulty breaking stable emulsions, and is costly. Another type of dryer is a desiccant unit; but, they have limited water removal capability, they only remove air ingressed particles, and again, can be costly. A third option is a coalescent unit; which can only remove free water, has difficulty breaking down stable emulsions and it can take up a lot of floor space.

Free vs. Dissolved Water

When discussing the effects of water contamination, there are two kinds of water to consider. The first is so-called "free" water and the second is "dissolved." Free water occurs when oil becomes saturated and cannot hold any more water. This water is usually seen as cloudy oil or puddles of water at the bottom of an oil reservoir. Water which is absorbed into the oil is called dissolved water. At higher temperatures, oil has the ability to hold more water in the dissolved stage due to the expansion of oil molecules. As the oil cools, this ability reverses and free water will appear where not visible before. In addition to temperature, fluid type also determines the saturation point for each system.

Restoring Contamination Oil

With the use of a portable purification system from Parker, it's possible to restore the oil to acceptable levels of purity. The machine draws the contaminated oil via a vacuum. The oil passes through the in-line low watt density heater where the oil is heated to an optimum temperature of 150°F. The oil then enters the distillation column where it is exposed to the vacuum through the use of special dispersal elements.

This increases the exposed surface area of the oil and converts the water to vapor form, which is then drawn through the condenser by the vacuum pump. The water-free oil falls to the bottom of the column and is removed by a heavy duty lube oil pump. This pump forces the dry oil through a final particulate removal filter. Clean oil passes out of the unit, back to the reservoir, and into the system. The oil is clean.

Parker PVS System

The Parker PVS System has many applications in the commercial/industrial marketplace. The most common applications in power plants are turbine oil, transformer oil and EHC systems. The system has many important design advantages:

  • Condensate holding tank to eliminate potential hazard of exhausting in the atmosphere

  • Compact size allows for easy transport and movement around the plant

  • Automatic operation increases running time and reduces labor costs

  • High temperature safety circuit prevents system damage

  • Programmable thermostat allows for unattended operation and increases oil life



Contamination Removal
High water and particulate contamination can be devastating to hydraulic and lubrication systems in combined cycle plants, causing component failure, bearing damage, and decreased life. Power Plant operators rely on Parker PVS Systems to remove all free water and 90 percent of dissolved water, gas and air.


SOS for Particulates
Another critical component in the power plant is the load tap changer (LTC) compartment, which can be protected from particulates in the oil by the Parker SOS stationary off-line system.


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