EHC Filtration Systems

Turbo-Vac®
Ion Charge Bonding EHC Purification System

Vacuum Distillation & Ion Charge Bonding Technology Purifies & Removes Contamination from all Phosphate Ester Fluids Used with Electrohydraulic Control Systems in Power Plants

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Kaydon's FilterDyne Vacuum Distillation and Ion Charge Bonding Technology controls acid number (AN), entrained gas buildup, fluid resistivity, water, and particulate in phosphate ester fluids used in electrohydraulic control systems (EHC systems). Elevated acid levels of greater than .1mg KOH are considered to be excessive for phosphate ester fluid and can lead to short fluid life. AN is the most important parameter to use when evaluating the condition of phosphate ester oil. High AN drastically decreases the fluid resistivity value and this can contribute to electro-kinetic wear of servo valves. In addition, chlorine content in excess of 20ppm, caused by chlorinated solvents, add to the electro-kinetic problem. The fluid resistivity value should be kept at a minimum of 5 x 109 ohm-cm @ 20¾C. Fuller's Earth, activated alumina, and Selexsorb® are conventional methods used in the past to control and neutralize acid number, and for maintaining a high fluid resistivity. These methods are effective in reducing your acid number and maintaining a high fluid resistivity, but each one produces its own negative effects. Fuller's Earth, over time, tends to leach out free metals such as calcium, magnesium, and iron. These free metals become dissolved by the acids in the phosphate ester fluid and can create even higher acid levels. Activated Alumina contains oxidized aluminum sodium. This produces harmful salts that can degrade the fluid and create deposits on metal surfaces. Selexsorb® GT is a patented filter media specifically designed to filter phosphate ester Fyrquel® fluids. The disadvantage of Selexsorb® GT is that it cannot be used with old phosphate ester fluid. This causes a "jelling" of the Selexsorb® GT resulting in clogged filters and the requirement to add new oil.

A Breakthrough - Ion Charge Bonding Technology! Resin beads bond to harmful acid ions to effectively remove them from all phosphate ester fluids. Water content in phosphate ester fluids must be kept to 300ppm or less, to avoid the effect of hydrolysis. The FilterDyne Vacuum Distillation System is capable of maintaining the oil below 300ppm. In addition, solid contamination, especially catalytic metal particles like copper, iron and lead increase the rate at which oxidation occurs. A 3-micron filter element, with a filtration rating of ß3 = 200, keeps the contamination level controlled. Kaydon's FilterDyne Vacuum Distillation System employs this level of filtration.

The advantages of ion charge bonding are that it has longer life than conventional methods of Fuller's Earth, activated alumina, and Selexsorb®. Ion charge bonding does not release unwanted minerals into the system, and does not remove any additive properties in the phosphate ester fluid. It has the highest adsorption capacity of any adsorptive filter and it can remove dissolved metals that were introduced by other adsorbent media. The ion charge bonding filter allows for more contact time with the phosphate ester fluid, compared to conventional media, which reduces the contact time with the oil.

Options

• 575 VAC, 50Hz‚ 415VAC, 50Hz‚ 400VAC, 50Hz‚ 380VAC, 50Hz Extra Heater - Adds heater rating to 15KW
• Dyna-Save - Water Cooling System - Minimizes the need for continuous cooling water. Increase length by 32"
• Explosion Proof Design - Class I, Div. II, Group C-D
• NEMA 4x Service*
  • Stainless Steel Electrical Enclosure
  • Cast Iron Motors
  • Inlet Shut-Off Valve - Solenoid-Operated
• Export Packaging

Filter Elements
A629021 gasket, channel, 8" vessel, Viton
A629022 gasket, channel, 12" vessel, Viton
124-833 seal kit for discharge pump, Viton
1241210 seal kit for vacuum pump, Viton

Gasket Seals
FE-622-792V Vacuum Chamber Element (disperser)
FE-618-1031V Post-Filter Element {6µ (ß6 = 200)}
A911300 Ion Charge Bonding (qty = 2)