Products
Pump
Ceramic Pump ET-Series
Ceramic Pump ET-Series are internationally renowned process pumps used in the heart of all kinds of chemical processes.
Ceramic Pump ET-Series use ceramics NGK (NGK Insulators) has developed for use in chemical processes with high strength, high corrosion resistance, and high wear resistance for parts that are in contact with liquids.
The designs conform to international standards (ISO 2858) and JIS standards.
In addition, these high corrosion resistant pumps incorporate various proprietary technologies which fulfill customer needs, including reduced maintenance and running costs, demonstrating their effectiveness in the heart of all kinds of chemical processes.
NGK (NGK Insulators) produced our first ceramic pump in 1931, and today, we deliver a full lineup of Ceramic Pump ET-Series, including high capacity and head models.
Characteristics
1. Corrosion Resistance
Parts in contact with liquids such as the casing and impeller use NGK’s prized chemical industry ceramics, and possess the highest corrosion resistance against almost all acids and organic solvents.
Furthermore, they lack the risks of corrosion caused by chemical permeation unavoidable with plastics or the electrolytic corrosion seen in corrosion resistant metals such as titanium.
However, they cannot be used with alkaline substances, hydrofluoric acid, or fluorine compounds.
2. Pressure and Heat Resistance
While the strength and heat resistance of ceramics is perfect for the pump structure, covering the exterior of the ceramic with additional cast iron armor makes the structure extremely strong.
In addition, since they are ceramic, there is no thermal deformation, so they maintain high performance over the long term.
Heat Resistant Temperature: -10 to 120℃
• The heat-resistant temperature varies with the properties of the liquid.
• Please contact us about applications below -10℃ or above 120℃.
3. Wear Resistance
The high-strength ceramics used in ET-type ceramic pumps are highly wear-resistant, providing excellent durability when processing liquids containing slurry.
PSZ (partially stabilized zirconia) impellers, which offer even greater wear resistance, are also available. Please contact us for more information.
Chemical Industry Ceramics Physical Characteristics
| Units | Chemical Industrial Ceramics | Conventional Ceramics | ||
|---|---|---|---|---|
| Coloration | Blue | White | ||
| Apparent Specific Gravity | 2.50 | 2.30 | ||
| Flexural Strength | (Glazed) | MPa | 122 | 93 |
| (Unglazed) | 137 | 103 | ||
| Compression Strength | MPa | 588 | 490 | |
Note: Shows representative values based on a test piece.
Toughness is a value which represents fracture strength and resistance to crack propagation when under shock loads. To put it simply, it is a benchmark of resistance to cracking.
4. Operability
For general purpose pumps, they conform to typical international standards (ISO 2858) and JIS standards, and not only do they simplify plant design, they have also been scaled down in size.
Furthermore, the back pull out design enables replacing and servicing parts without disconnecting the piping, simplifying maintenance.
5. Interchangeability
NGK pumps that conform to international standards offer an interchangeability, and are designed to share parts with EB series PFA pumps as well.
6. Pump Performance
The superior pumping efficiency achieved with high hardness ceramic impellers reduces running costs.
7. Shaft Seal Reliability
From our extensive experience in the field of corrosion resistant pumps, we offer variety of shaft seal devices optimum for the needs.
This ensures leakless, trouble-free operation over the long term, reducing maintenance costs.
Ceramic Pump EK-Series (SiC)
Ceramic Pump EK-Series use thick pressureless sintered silicon carbide (SiC) for parts that contact liquids.
These highly corrosion resistant pumps exhibit near perfect resistance to corrosion.
Characteristics
1. Superior Corrosion Resistance
They can be used for chemicals which are typically difficult to pump, such as high temperature hydrochloric acid, high temperature sulfuric acid, and hydrofluoric acid.
In addition, there is extremely minimal leaching of ceramic compounds into the pumped liquid, enabling prevention of contamination.
2. Superior Permeation Resistance
Since bulk silicon carbide is sintered to a high density, there is no penetration even by highly penetrating liquids such as organic acids and organochlorides, enabling stable operation.
3. Superior Heat and Thermal Shock Resistance
Due the high thermal conductivity and hardness of silicon carbide, they can be used for liquids with a maximum temperature of 160℃, and with a temperature differential of up to 100℃ (1.4 times that of our conventional pumps).
This means it is not necessary to preheat or precool the pumped liquid in the first stage of the pumps, making them suitable for pumping liquids in multipurpose plants, etc.
4. Superior Durability
As the impeller blades and sleeve are single-piece constructions, using no O-rings or other elastic materials, there is no need to replace O-rings, greatly increasing durability and maintainability.
For the shaft seals, they can be equipped with mechanical seals proven in all types of ET series ceramic pumps (M-frame models: shaft diameter of 50 mm).
Silicon Carbide Characteristics
The silicon carbide used in Ceramic Pump EK-Series is the pressureless sintered alpha type, and among typical industrial ceramics, its hardness ranks second to diamond.
Its resistance to corrosion, permeation, and thermal shock in particular are superior relative to other materials.
| Class | Characteristic | SiC | 98% Alumina | High-Alumina Ceramic |
Teflon PFA | Nickel Molybdenum Alloy | |
|---|---|---|---|---|---|---|---|
| Physical Characteristics (Room Temperature) |
Density | Kg/m³ | 3,100 | 3,600 | 2,500 | 2,140 | 8,900 |
| Flexural Strength | MPa | 480 | 310 | 90 | 27 (tension) | 820 (tension) | |
| Elastic Coefficient | GPa | 410 | 290 | 82 | 0.80 | 210 | |
| Thermal Expansion Coefficient | ×10⁻⁶/K | 4.2 | 6.8 | 6.0 | 150 | 10.8 | |
| Hardness (Hv) | GPa | 27.5 | 15.4 | 13.0 | - | 2.0 | |
| Material Corrosion Resistance | 20% Hydrochloric Acid | Usable Temperature K | 453.15 | 403.15 | 363.15 | 363.15 | 353.15 |
| 60% Sulfuric Acid | Usable Temperature K | 453.15 | 403.15 | 383.15 | 413.15 | 373.15 | |
| 25% Sodium Hydroxide | Usable Temperature K | 423.15 | 353.15 | N/A | 413.15 | 373.15 | |
| 50% Hydrofluoric Acid | Usable Temperature K | 373.15 | N/A | N/A | 353.15 | N/A | |
|
Characteristics for Pump Applications ◎: Excellent 〇: Superior △: Usable for a limited period ×: Not usable |
Wear Resistance | - | ◎ | ◯ | ◯ | ✕ | △ |
| Chemical Permeation Resistance | - | ◎ | ◎ | ◯ | △ | ◎ | |
| Thermal Shock Resistance | - | ◎ | ◯ | ◯ | ◎ | ◎ | |
The data in this table and characteristics comparison show representative values for each material and should not be taken as specifications.
Corrosion resistance is based on the results of beaker tests. The usable temperature range for actual pump applications must be determined separately.
Ceramic Pump EZ-Series (Magnet Drive)
Ceramic Pump EZ-Series use fine ceramics for parts in contact with liquids.
This is world’s first high corrosion resistance leakless pump, perfected by NGK.
(Conforms to ISO 2858 pump standards)
Characteristics
1. Superior Sealing
Since they are centrifugal pumps without a shaft seal, they are perfect for pumping liquids which cannot be allowed to escape.
2. Superior Corrosion Resistance
As the parts in contact with liquids are ceramic, they have excellent resistance to corrosion by almost any chemical.
In addition, the structure is stable, with no liquid permeation or deformation, even by organic solvents.
3. Superior Performance
Critical parts such as the can and rotor cover, etc., use partially stabilized zirconia (PSZ), which enables use at temperatures up to 120℃.
Additionally, the use of a ceramic can eliminates rotating field eddy current heating loss, improving efficiency by 7 to 10%. (in comparison to a metal can)
[PSZ Physical Characteristics]
| Ceramics | Test Pressure (MPaG) | |||||
|---|---|---|---|---|---|---|
| PSZ | Silicon Nitride | Silicon Carbide | Alumina (95%) | S45C | SS41 | |
| Manufacturing Method | Pressureless Sintering | Pressureless Sintering | Pressureless Sintering | Pressureless Sintering | - | - |
| Density (kg/cm³) | 5900 | 3200 | 3100 | 3600 | 7800 | 7900 |
| Four-Point Flexural Strength (MPa at room temperature) |
1019.9 | 882.6 | 500.1 | 313.8 | >568.8 (tension) | >402.1 (tension) |
| Elasticity (GPa) |
205.94 | 225.55 | 304.01 | 294.2 | 205.94 | 205.94 |
| Fracture Toughness K2c (MPa·√m) |
8.5 | 7 | 2.4 | 3.8 | 80–100 | 80–100 |
| Thermal Expansion Coefficient (×10⁻⁶/K) |
10.5 | 3.3 | 4.3 | 6.8 | 11.2 | 12 |
| Thermal Conductivity (W/(m·K)) |
2.93 | 29.31 | 16.75 | 16.75 | 50.24 | 50.24 |
4. Superior Slurry Properties
The high hardness of the ceramics and the unique flushing structures at shaft bearing also enable pumping liquid slurries.
Chemflow Pump EB-Series (PFA lining)
Chemflow Pump EB-Series (PFA lining) are all-purpose high corrosion resistance pumps that securely pump all kinds of chemicals.
Chemflow Pump EB-Series (PFA lining) were developed and commercialized based on NGK's (NGK Insulators) extensive experience in the anti-corrosion field and cutting-edge plastic molding techniques.
The parts in contact with liquids are lined with PFA (perfluoroalkoxy ethylene copolymer), which possesses the highest corrosion resistance among plastics.
The designs also conform to international standards (ISO 2858) and JIS standards.
Furthermore, they incorporate proprietary technologies everywhere to reduce running and maintenance costs.
With a range of nine models, EB series PFA pumps are high corrosion resistance pumps that meet the needs for high reliability, durability, and ease of handling, etc., in all kinds of chemical processes.
Characteristics
1. Corrosion Resistance
Chemical Resistance Comparison with Other Fluoroplastics
| Plastic | PFA | PTFE | PVDF | ETFE | |
|---|---|---|---|---|---|
| Maximum Usable Temperature | 230℃ | 230℃ | 135℃ | 150℃ | |
| Chemicals | Acids | ◎ | ◎ | ◯ | ◯ |
| Bases | ◎ | ◎ | △ | ◯ | |
| Solvents | ◎ | ◎ | △ Not usable with polar solvents | ||
◎ Excellent 〇 Good △ Precautions for use required
The above values are not certified values.
2. Durability
The PFA liner in contact with liquids and the metal armor are mechanically bonded, so it is safe from separation of the lining or stress cracking.
3. Pressure and Heat Resistance
The thick PFA liner is mechanically bonded to the FCD-S (ductile cast iron) armor, so they can be operated safely.
Heat Resistant Temperature: -10 to 150℃
• The heat-resistant temperature varies with the properties of the liquid.
• Please contact us about applications below -10℃.
4. Operability
They conform to international standards (ISO 2858) and JIS standards, and not only do they simplify plant design, they have also been scaled down in size.
Furthermore, the back pull out design enables replacing and servicing parts without disconnecting the piping, simplifying maintenance.
5. Interchangeability
NGK pumps that conform to international standards offer an interchangeability, and are designed to share some parts with ET series ceramic pumps as well.
6. Pump Performance
Excellent pumping efficiency reduces running costs.
Additionally, based on pump specifications compliant with ISO standards, you can make a rational model selection from a broad range up to a 5 m³/min maximum flow rate and a 90 m lift height.
7. Shaft Seal Reliability
From our extensive experience in the field of corrosion resistant pumps, we offer variety of shaft seal devices optimum for the needs.
This ensures leakless, trouble-free operation over the long term, reducing maintenance costs.