Sealing-Focused Manual Zirconia Ceramic Double Disc Gate Valve for Process Industries
The Manual Zirconia Ceramic Double Disc Gate Valve integrates advanced zirconia ceramic technology with precise mechanical design to ensure reliable flow control in demanding industrial systems. Its key features highlight measurable advantages in hardness, sealing, and service life that address the most common pain points faced by power plants, mining operations, and chemical processors.
Catalog No.
AT-ZV2-S001
Material
Zirconia ceramic discs + metal body (carbon steel or stainless steel)
Hardness
HRA 88, about 8× higher than carbon steel
Service Life
Lasts 3–5 times longer than metal gate valves in slurry applications
Sealing Performance
Bi-directional sealing, tested to over 100,000 cycles without leakage
ADCERAX® Manual Zirconia Ceramic Double Disc Gate Valve is designed for industries that face abrasive and corrosive media such as ash, slurry, and chemical solutions. Its zirconia ceramic discs provide high hardness and chemical stability, ensuring secure shut-off and extended service life. This valve is widely applied in power generation, mining, chemical processing, and water treatment systems where reliability and long-term performance are critical.
Features of Manual Zirconia Ceramic Double Disc Gate Valve
The zirconia ceramic discs reach HRA 88 hardness, which is about 8 times higher than standard carbon steel, ensuring superior resistance to abrasive particle erosion.
Independent tests show valves with zirconia sealing surfaces last 3–5 times longer than conventional metal gate valves in slurry transport systems.
In coal-fired power plants, ceramic disc valves reduce unplanned shutdowns by up to 40%, directly lowering maintenance and replacement costs.
The double disc structure provides bi-directional sealing, achieving leakage rates below Class V (FCI 70-2 standard) in both high- and low-pressure lines.
Field performance data indicate ceramic-to-ceramic sealing can sustain over 100,000 open/close cycles without measurable degradation.
When used in chemical pipelines, zirconia ceramic valves maintain zero visible leakage even after 12 months of continuous operation.
Zirconia ceramics demonstrate corrosion resistance up to pH 2–12, outperforming stainless steel in acidic and alkaline environments.
In pulp and paper processing, valve lifespan extends by 30–50% compared to alloy-based alternatives due to chemical inertness.
Data from wastewater plants show zirconia ceramic valves maintain structural integrity after exposure to 200°C temperatures and abrasive slurry for over 18 months of service.
Technical Properties for Manual Zirconia Ceramic Double Disc Gate Valve
The Manual Zirconia Ceramic Double Disc Gate Valve is engineered with advanced zirconia ceramic materials and metal housings to deliver high hardness, chemical stability, and long service life.
Property
Pure Zirconia (Monoclinic) - Unstabilized
Yttria-Stabilized Zirconia (YSZ)
Magnesia-stabilized zirconia (Mg-PSZ)
Typical Purity
High-purity raw material, but unstabilized for the final product
High purity
High purity
Crystal Phases (at RT)
Monoclinic (stable up to ~1170°C); Tetragonal and Cubic at higher temperatures.
Primarily, Metastable Tetragonal can have a Cubic phase.
Partially stabilized with tetragonal precipitates in a cubic matrix.
Density (g/cm³)
5.65–6.05
5.85-6.1
~5.7
Melting Point (°C)
~2700-2715
Very High (similar to pure zirconia, but phase stability is key)
Very High
Thermal Conductivity (W/m·K)
Low (approx. 2-3)
Low (approx. 2.5-3)
Low (approx. 3)
Thermal Expansion Coefficient (10⁻⁶/K)
~10
9.5-10
10
Flexural Strength (MPa)
Poor (due to phase transformation and brittleness)
Up to 1000, 710-900
500
Compressive Strength (MPa)
Not typically used structurally
~2000
~2500
Fracture Toughness (MPa·m^0.5)
Low (inherently brittle)
Up to 10 (exceptionally high for ceramics due to transformation toughening), 8-9
6
Hardness (Vickers, HV1)
Moderate
11-13 GPa, 1100-1220 kg/mm²
1100 kg/mm²
Chemical Inertness
Excellent in acids and alkalis
Excellent
Excellent
Biocompatibility
Generally good, but stabilized forms are preferred for medical use
Excellent, widely used in dental and medical implants
Refractories, structural components requiring specific thermal properties
Specifications of Manual Zirconia Ceramic Double Disc Gate Valve
Model
inch
DN(mm)
L
D
D1
D2
n-M
H
Notes
AT-ZV2-S001
2"
50
90
160
125
99
4-M16
380
Nominal Diameter: DN50–DN250;
Working Pressure: 1.0 MPa–1.6 MPa;
Operating Temperature: -20°C to 180°C;
Connection Types: Flanged, Wafer;
Actuation Methods: Manual.
AT-ZV2-S002
2 1/2"
65
125
185
145
118
4-M16
485
AT-ZV2-S003
3"
80
140
200
160
132
8-M16
490
AT-ZV2-S004
4"
100
170
220
180
156
8-M16
585
AT-ZV2-S005
5"
125
185
250
210
184
8-M16
630
AT-ZV2-S006
6"
150
200
280
240
211
8(12)-M20
750
AT-ZV2-S007
8"
200
220
340
295
266
8(12)-M20
830
AT-ZV2-S008
10"
250
220
395
350
320
12-M20
985
Packaging of Manual Zirconia Ceramic Double Disc Gate Valve
Each Manual Zirconia Ceramic Double Disc Gate Valve is first protected with foam-lined wooden boxes to prevent impact during transit. Valves are then packed into reinforced cartons and secured inside export-grade wooden crates for bulk shipment. This ensures them arrives intact, safe, and ready for installation.
The Manual ZrO2 Double Disc Gate Valve addresses the critical challenges of industries handling abrasive, corrosive, or high-temperature media. By combining zirconia ceramic hardness with bi-directional sealing and chemical inertness, it provides measurable solutions in specialized industrial environments.
Dry Ash Hopper Discharge
✅Key Advantages
1. Bi-Directional Class V Sealing — Verified both flow directions to FCI 70-2 Class V at line classes PN10–PN16; prevents reverse leakage during hopper pressure equalization.
2. High-Temperature Abrasion Endurance — Zirconia discs at HRA ≥ 88 maintain sealing for >100,000 cycles in fly-ash service at 200–350 °C.
3. Maintenance-Ready Manual Control — Handwheel rising-stem with dual cleaning/drain ports supports safe isolation and purging during planned outages.
✅ ️Problem Solved
At coal units handling dry fly ash, metal knife gates leaked under variable head, causing blockages and unplanned cleanups. After switching to ADCERAX® Manual Zirconia Ceramic Double Disc Gate Valve (PN16, Class V), sites reported fewer reverse-flow events and longer service intervals, aligned with >100,000-cycle endurance and HRA ≥ 88 sealing faces. Plants documented outage work confined to planned windows as purging leveraged the dual side ports, and unplanned shutdowns fell up to 40% in the first season.
High-Density Slurry Recirculation Loops
✅Key Advantages
1. Dual-Direction Shut-Off in Slurry — Double-disc design sustains Class V sealing under recirculating loads at PN10–PN16, preventing back-mixing.
2. Extended Wear Life in Abrasives — Zirconia sealing faces (HRA ≥ 88) deliver >12 months typical service in dense mineral slurries versus metal gates.
3. Actuator-Free Reliability — Manual handwheel operation reduces actuator failure points; cycle life validated at >100,000 cycles in slurry duty.
✅ ️Problem Solved
A concentrator loop experiencing seal loss every 3–6 months on metal gates adopted ADCERAX® Manual Zirconia Ceramic Double Disc Gate Valve. With bi-directional Class V shut-off and HRA ≥ 88 discs, mean time between interventions exceeded 12 months, and unexpected stoppages tied to valve leakage were eliminated across the review period. Manual local control simplified spares and reduced logistics burden at remote sites.
Neutralization Tank Outlet Control
✅Key Advantages
1. Corrosion Stability Across pH 2–12 — Zirconia ceramic sealing resists alternating acidic/alkaline streams, preserving surface integrity.
2. Reverse-Flow Isolation for Batches — Double-disc geometry maintains Class V shut-off in both directions, avoiding cross-contamination between cycles.
3. Manual Precision Metering — Rising-stem travel enables fine outlet control; installations have held zero visible leakage after 12 months of batch operation.
✅ ️Problem Solved
Facilities running alternating acid/alkali batches saw butterfly and ball valves corrode and leak during reverse isolation, destabilizing pH control. Replacing them with ADCERAX® Manual Zirconia Ceramic Double Disc Gate Valve delivered pH-range (2–12) compatibility and bi-directional Class V sealing, keeping outlet pH within tight process bands and removing contamination events through consecutive campaigns. Maintenance records showed stable performance over 12 months without leakage rework.
User Guide for Manual Zirconia Ceramic Double Disc Gate Valve
Proper operation of a Manual ZrO2 Double Disc Gate Valve requires careful handling, installation, and maintenance. This guide provides practical recommendations to help users maximize service life, ensure safe operation, and reduce unnecessary downtime.
Pre-Installation Checks
1. Visual inspection: Examine the valve body and ceramic discs for cracks or visible surface damage before installation. Three minutes of inspection can prevent unexpected leakage in service.
2. Component verification: Confirm flange size, pressure rating, and flow direction alignment with pipeline requirements. This ensures correct fitment and avoids system mismatch.
3. Cleanliness assurance: Flush pipeline to remove debris and foreign particles before mounting the valve. Residual solids can scratch ceramic discs and compromise sealing performance.
Installation Guidelines
1. Correct orientation: Position the Manual Zirconia Ceramic Double Disc Gate Valve according to flow direction arrows on the body. Wrong alignment can reduce sealing efficiency and shorten lifespan.
2. Secure tightening: Apply uniform torque to flange bolts during installation. Uneven tightening may distort sealing faces and cause leakage under pressure.
3. Shock prevention: Avoid hammering or direct impact on the valve body when positioning. Sudden shocks may fracture zirconia components due to their brittle nature.
Operational Recommendations
1. Gradual operation: Rotate the handwheel slowly during opening and closing cycles. Abrupt movement can stress the discs and accelerate wear.
2. Cycle frequency: Operate the valve at least once every four weeks in idle systems. Regular cycling prevents sticking and maintains smooth sealing contact.
3. Pressure monitoring: Always verify that line pressure stays within the rated limit. Exceeding PN16 or equivalent ANSI rating risks premature failure.
Maintenance and Storage
1. Routine inspection: Check for signs of leakage, torque resistance, or unusual vibration after every 500 operating cycles. Preventive maintenance reduces downtime costs.
2. Seal care: Replace sealing elements if leakage exceeds 1% of rated flow. Overused seals compromise Class V shut-off standards.
3. Storage conditions: Store the valve in a dry, vibration-free environment, ideally between 5–40°C. Proper storage maintains dimensional stability and ceramic integrity.
FAQs about Manual Zirconia Ceramic Double Disc Gate Valve
Q: How does the Manual Zirconia Ceramic Double Disc Gate Valve prevent leakage in abrasive media?
A: The valve uses bi-directional Class V sealing, which ensures tight shut-off in both flow directions. Its zirconia discs withstand abrasion from fly ash and slurry without surface degradation. This prevents leakage that often occurs with conventional metal valves.
Q: Why is zirconia ceramic used in the Manual Zirconia Ceramic Double Disc Gate Valve?
A: Zirconia ceramic achieves hardness levels of HRA 88, nearly eight times stronger than carbon steel. This material resists abrasive wear and chemical corrosion far better than metals. As a result, service life is extended while reducing downtime.
Q: Can the Manual Zirconia Ceramic Double Disc Gate Valve operate under high-temperature conditions?
A: Yes, the zirconia discs remain stable at 200–400°C, depending on the packing and seals used. This makes the valve suitable for fly ash discharge systems and steam handling lines. Conventional valves often fail at these temperatures, but this design resists deformation.
Q: How does the Manual Zirconia Ceramic Double Disc Gate Valve handle reverse flow challenges?
A: Its double-disc design creates secure bi-directional shut-off. In neutralization tanks or batch processes where flow reverses, the valve maintains sealing integrity. This prevents contamination or backflow, ensuring process reliability.
Q: What is the expected service life compared to a metal gate valve?
A: Field data shows the Manual Zirconia Ceramic Double Disc Gate Valve lasts 2–3 times longer than conventional metal valves in abrasive service. For slurry pipelines, this often translates into more than 12 months of continuous operation. Extended life reduces replacement and labor costs.
⭐️⭐️⭐️⭐️⭐️
“The Manual Zirconia Ceramic Double Disc Gate Valve solved our leakage issues in ash handling systems. After installation, downtime dropped significantly because of the valve’s strong bi-directional sealing. The zirconia discs have already lasted longer than any metal alternative we previously used.”
– John M., Maintenance Supervisor, Midwest Power Solutions
⭐️⭐️⭐️⭐️⭐️
“We integrated the Manual Zirconia Ceramic Double Disc Gate Valve into our slurry recirculation loops, and the improvement was immediate. The abrasion resistance held up under high-density flow for over a year without needing replacement. This has cut our maintenance costs by more than 30% annually.”
– Sarah L., Process Engineer, Northland Mining Group
⭐️⭐️⭐️⭐️⭐️
“In our neutralization tanks, corrosion was a constant problem until we switched to the Manual Zirconia Ceramic Double Disc Gate Valve. The valve’s stability across a wide pH 2–12 range gave us consistent sealing results. It has eliminated contamination incidents and improved our compliance confidence.”
– Michael R., Operations Manager, EuroChem Industrial Solutions
⭐️⭐️⭐️⭐️⭐️
“The Manual Zirconia Ceramic Double Disc Gate Valve provided us with reliable manual shut-off in high-temperature discharge lines. The handwheel control was smooth, and sealing integrity was maintained even after 100,000+ operating cycles. We trust this valve now as a standard in our replacement program.”
– Emma T., Reliability Engineer, Atlantic Energy Systems
Customization Services for Manual ZrO2 Double Disc Gate Valve
ADCERAX® provides tailored solutions for the Manual Zirconia Ceramic Double Disc Gate Valve, ensuring each unit meets the specific technical and operational demands of industrial clients. Customization allows alignment with unique flow conditions, material requirements, and site standards.
Valve Body Materials
Valve body materials can be selected by your requirements to enhance durability in specific working environments.
Carbon Steel — Strong support for general industrial service
Stainless Steel — Superior corrosion resistance in chemical conditions
Alloy Options — Enhanced strength for high-wear applications
Actuation Interfaces
Designs can be customized for manual or hybrid integration with control systems.
Handwheel Drive — Precise local control with minimal torque effort
Gear-Assisted — Smooth operation for larger valve diameters
Retrofit Ready — Future upgrade compatibility with automation
Connection Standards
The valve can be manufactured to fit diverse pipeline standards and project requirements.
DIN Flanges — Widely used across European industrial systems
ANSI Flanges — Common in American power and chemical sectors
Custom Ends — Adaptable to site-specific pipeline connections
