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WJZ-K8 Fire-Resistant Fluid (EHC) Purifier

The latest dry ion exchange resin technology effectively removes acidic compounds from fire-resistant fluid, with 7 times the acid removal capacity of diatomaceous earth, maintaining the acid number (TAN) below 0.15 mg KOH/g
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WJZ-K8 Fire-Resistant Fluid (EHC) Purifier
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WJZ-K8 Fire-Resistant Fluid (EHC) Purifier

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The latest balanced charge technology effectively removes system sludge and varnish, prevents valve spool sticking, maintains system cleanliness below NAS 5 long-term, effectively increases the resistivity of the fire-resistant fluid and prevents electrochemical corrosion
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High-efficiency vacuum dehydration and degassing system rapidly separates water and gases, keeping water content below 300 ppm
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Dual oil pumps + dual VFDs automatically balance inlet and outlet flow without manual adjustment
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PLC intelligent control with PID interlock of oil temperature, level and flow; automatic defoaming, automatic vacuum regulation and automatic water drainage without stopping
Real-time monitoring and display of key data: pre-filter pressure, collector pressure, inlet flow, outlet flow, oil temperature, high-voltage electrostatic voltage and leakage current
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Product Features

Utilizes high-purity dry ion exchange resin with a spherical bead structure and uniform particle size, completely preventing resin leakage into the circuit. The acid removal process generates zero gel-like metal phosphate precipitates and actively decomposes existing deposits, thoroughly eliminating servo valve spool sticking and extending fluid service life.
Gel-Free Acid Removal & Servo Valve Protection
Utilizes high-purity dry ion exchange resin with a spherical bead structure and uniform particle size, completely preventing resin leakage into the circuit. The acid removal process generates zero gel-like metal phosphate precipitates and actively decomposes existing deposits, thoroughly eliminating servo valve spool sticking and extending fluid service life.
Equipped with a large-surface-area heating system featuring an ultra-low surface heat flux (≤2 W/cm²) to eliminate localized overheating and thermal fluid degradation. A multi-tier safety architecture combining PLC intelligent logic, inline temperature sensors, and liquid-expansion thermostats ensures precise automatic temperature regulation and fail-safe operation.
Low-Heat-Flux Thermal Conditioning & Multi-Tier Safety
Equipped with a large-surface-area heating system featuring an ultra-low surface heat flux (≤2 W/cm²) to eliminate localized overheating and thermal fluid degradation. A multi-tier safety architecture combining PLC intelligent logic, inline temperature sensors, and liquid-expansion thermostats ensures precise automatic temperature regulation and fail-safe operation.
Rapidly captures and decomposes oxidation gums, varnish, and sub-micron degradation products accumulated throughout the fluid system. Successfully resolves spool sluggishness and sticking in high-precision servo valves, deeply decontaminates the lubrication and control network, and substantially optimizes the overall operating environment.
Oxidation Gum Elimination & Deep System Decontamination
Rapidly captures and decomposes oxidation gums, varnish, and sub-micron degradation products accumulated throughout the fluid system. Successfully resolves spool sluggishness and sticking in high-precision servo valves, deeply decontaminates the lubrication and control network, and substantially optimizes the overall operating environment.
Features a compact footprint and non-intrusive bypass design, enabling seamless online operation without interfering with main turbine equipment. Built for true 24/7 unattended running with fully automated monitoring and fault alerts, drastically lowering routine maintenance workload and delivering exceptionally low operating costs.
Intelligent Unattended Operation & Low Lifecycle Cost
Features a compact footprint and non-intrusive bypass design, enabling seamless online operation without interfering with main turbine equipment. Built for true 24/7 unattended running with fully automated monitoring and fault alerts, drastically lowering routine maintenance workload and delivering exceptionally low operating costs.

Process Flow Diagram

Balanced Charge Agglomeration

Positive and negative electrodes are placed in two parallel flow paths through the non-conductive fluid, charging the particulate contaminants — one path with a positive (+) charge and the other with a negative (-) charge.


The oppositely charged particles are then remixed, attract each other and agglomerate into larger clusters, so that fine particles that are otherwise difficult to filter can be easily captured and removed.

Vacuum Flash Dehydration

Under high vacuum, the boiling point of water drops sharply, creating a large gap between the boiling points of water and oil. In the vacuum dehydration system the oil is heated and held at approximately 60 ℃; under vacuum the water reaches its boiling point and begins to evaporate.


Inside the vacuum separation chamber, the oil is sprayed through nozzles into a coarse mist, greatly increasing the evaporation surface area and efficiency. Drawn by the vacuum pump, the water vapor enters the condenser, condenses into droplets and is collected in the water tank, completing oil-water separation.

DICR (Dry Ion Exchange Resin) technology removes soluble contaminants ranging from acids to metal salts without introducing hazardous sub-micron particles. Compared with other acid removal technologies, DICR offers several times higher acid removal capacity, longer life and greater effectiveness. Our DICR technology generates no water during acid removal, and has a proven track record of more than 20 million hours of successful operation.


Technical Specifications
ParameterSpecification
Length1110mm
Width1050mm
Height1685mm
Weight340kg
Power SupplyCustomized based on request (For example: USA 480V 60Hz, Mexico 440V/220V 60Hz, Saudi Arabia 380V 60Hz, Nigeria 415V 50Hz...)
Flow Rate8L/min
CE CertificationYes
Protection ClassIP55
SealsFKM (Fluoroelastomer / Viton®)
Inlet/Outlet PortM26×1.5
Filtration StagesThree-stage: suction strainer + 5 μm + 3 μm
Material of ConstructionStainless steel 304
Inlet Connection1CB-26-08WD  M26×1.5 for hose; G1/2"×14 for ball valve
Outlet Connection1CB-26-08WD  M26×1.5 for hose; G1/2"×14 for ball valve
Characteristics of Fire-Resistant Fluid
Contamination Pain Points of Fire-Resistant Fluid in Captive Power Plants

With the extensive commissioning of high-parameter and large-capacity generating units, fire-resistant fluids have become widely utilized in Electro-Hydraulic Control (EHC) systems. Consequently, quality monitoring and testing of fire-resistant fluids have emerged as a critical component of power plant chemical supervision.

  • Synthetic Base: Unlike conventional mineral oils, it is a synthetic oil primarily composed of phosphate esters.

  • Higher Density: Phosphate ester fire-resistant fluid has a density greater than 1 (typically 1.11–1.17g/cm31.11\text{–}1.17\text{ g/cm}^3).

  • Combustion & Stability Profile: Highly flame-resistant with relatively high toxicity; exhibits relatively poor thermal and hydrolytic stability.

  • High Hygroscopicity: Strong tendency to absorb ambient moisture.

  • Operational Vulnerabilities: Prone to increased total acid number (TAN), degraded electrical resistivity, and elevated water content during routine operation.

Fluid Contamination Pain Points:

Fire-resistant fluids used in EH (Electro-Hydraulic) systems inherently suffer from poor thermal stability, low hydrolytic stability, and extremely high hygroscopicity. Over prolonged operation, fluid oxidation and phosphate ester hydrolysis inevitably drive up the Total Acid Number (TAN), while accumulated moisture significantly increases water content. Furthermore, particulate contamination severely compromises the safe and reliable operation of the EH control system.


Applicable To:

Phosphate ester fire-resistant fluids in power plant EH oil reservoirs.


Target Parameters Addressed:

Cleanliness (particle count), Total Acid Number (TAN), Electrical Resistivity, Moisture Content.


Core Technologies Employed:

Balanced Charge Agglomeration + Dry Ion Exchange Resin (DICR) + High-Efficiency Vacuum Dehydration.



Customer Case Studies

Customer Background:

Zhong'an United Coal Chemical Co., Ltd. comprises a Coal Chemical Branch and a Coal Mining Branch. Phase I of its Coal-Chemical Integration Project features a coal-to-methanol production capacity of 1.7 million tons/year, a 350,000 tons/year linear low-density polyethylene (LLDPE) unit, and a 350,000 tons/year polypropylene (PP) unit, supported by an adjacent coal mine with an annual output of 4 million tons.


Customer Pain Point:

Excessive Total Acid Number (TAN exceeding operational limits)


System / Application:

EH (Electro-Hydraulic) Control System


Fluid Type & Grade:

Great Lakes Phosphate Ester Fire-Resistant Hydraulic Fluid ISO VG 46


Reservoir Capacity:

1 m31\text{ m}^3 (approx. 1,000 Liters)


Purifier Commissioning Date:

2020 to Present (Continuous reliable operation since 2020)



Keep your oil clean. Keep your business running

Discover how removing particles, water, varnish and acids can reduce breakdowns, extend oil and equipment life, and lower maintenance costs.