| Customization: | Available |
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| Structure: | Single End |
| Pressure: | High Pressure Mechanical Seals |
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Parameter
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Details
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General Information
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Seal Type
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Qt - Tc Ring (Tungsten Carbide Ring)
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Application
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Widely used in pumps, compressors, agitators, and other industrial machinery to prevent fluid leakage and ensure efficient operation.
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Physical Properties
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Density
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Ranges from 14.4 - 15.0 g/cm³. This high density provides robust structural integrity, enabling the seal ring to withstand significant mechanical forces during operation.
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Hardness
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Exhibits a high hardness rating. Specifically, on the Rockwell A scale, it ranges from HRA 89.5 - 91.0. This high hardness ensures excellent resistance to wear and tear, making it suitable for applications where there is continuous friction between sealing surfaces.
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Fracture Toughness
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Possesses excellent fracture toughness. This property allows the Qt - Tc Ring to withstand high - stress conditions without cracking or breaking, ensuring long - term reliability in demanding industrial environments.
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Thermal Conductivity
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High thermal conductivity, which is crucial for facilitating heat dissipation during operation. This helps in maintaining the optimal temperature of the sealing system and prevents overheating that could lead to seal failure.
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Corrosion Resistance
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Highly resistant to various corrosive environments. It can be used in applications involving exposure to chemicals, acidic or alkaline fluids, and other corrosive substances, enhancing the longevity of the seal in such harsh conditions.
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Mechanical Performance
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Pressure Resistance
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Static Pressure
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Can withstand static pressures up to 40 MPa. This makes it suitable for applications where there is a need to maintain a tight seal under high - pressure static conditions, such as in some types of hydraulic systems.
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Dynamic Pressure
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For dynamic applications, like in pumps and compressors, it can handle dynamic pressures up to 35 MPa. The ring's design and material properties enable it to maintain an effective seal even when the pressure is fluctuating during the operation of the machinery.
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Temperature Range
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Minimum Operating Temperature
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- 40 °C. The Qt - Tc Ring can function effectively in low - temperature environments, such as in some refrigeration or cryogenic applications.
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Maximum Operating Temperature
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250 °C. It can also withstand high - temperature conditions, making it suitable for applications in industries like chemical processing, where the fluids being sealed may be at elevated temperatures.
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Sliding Speed
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In applications involving sliding motion, such as in mechanical seals of rotating shafts, the Qt - Tc Ring can handle sliding speeds up to 15 m/s. This high - speed capability is essential for ensuring smooth operation and reliable sealing in high - speed machinery.
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Chemical Compatibility
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Fluids Compatible
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Compatible with a wide range of fluids, including mineral oil - based hydraulic fluids, barely flammable hydraulic fluids, water, air, and many common industrial chemicals. However, for highly specialized or aggressive chemicals, further compatibility testing may be required.
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Geometric Dimensions
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Inner Diameter (ID)
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Available in a variety of standard sizes, with common diameters starting from 10 mm and going up to 500 mm. Custom sizes can also be manufactured according to specific application requirements.
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Outer Diameter (OD)
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Corresponding to the inner diameter, the outer diameter sizes are designed to fit standard mechanical seal housings. For example, if the inner diameter is 50 mm, a common outer diameter might be 70 mm, but this can vary depending on the specific seal design and application.
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Face Width
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The face width of the Qt - Tc Ring is designed based on the operating conditions. For general applications, it typically ranges from 5 - 20 mm. In high - speed or high - pressure applications, a wider face width (up to 20 mm) may be used to improve heat dissipation and sealing performance. In applications with space constraints, a narrower face width (around 5 mm) can be selected.
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Groove Dimensions (if applicable)
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When the seal ring is used in a groove - type sealing system, the groove depth and width are critical for proper installation and performance. The groove depth usually ranges from 3 - 10 mm, and the groove width from 6 - 12 mm. These dimensions are carefully designed to ensure a proper fit of the seal ring, allowing it to deform slightly under pressure to create an effective seal without extrusion or premature failure.
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Manufacturing Tolerances
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Diameter Tolerances
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The inner and outer diameter tolerances are maintained within a tight range. For standard applications, the tolerance on the inner diameter is ±0.05 mm, and on the outer diameter is ±0.1 mm. In high - precision applications, these tolerances can be reduced to ±0.02 mm and ±0.05 mm respectively to ensure a perfect fit within the mechanical seal assembly.
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Flatness Tolerance
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The face of the Qt - Tc Ring is required to be highly flat. The flatness tolerance is typically maintained within 0.002 - 0.005 mm over the entire face area. This high - level flatness is crucial for achieving a leak - tight seal when in contact with the mating surface.
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Parallelism Tolerance
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The two faces of the seal ring need to be parallel to each other. The parallelism tolerance is usually within 0.003 - 0.006 mm. This ensures uniform pressure distribution across the sealing face and helps in preventing uneven wear and leakage.
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Surface Finish
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Ra Value
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The surface finish of the Qt - Tc Ring is specified by the Ra (arithmetical mean deviation of the assessed profile) value. For most applications, the Ra value of the sealing face is between 0.1 - 0.4 μm. A smooth surface finish reduces friction between the seal ring and the mating surface, improves the sealing performance, and extends the service life of the seal.
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Assembly and Installation
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Installation Torque
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When installing the Qt - Tc Ring in a mechanical seal assembly, a specific installation torque is recommended. For standard - sized rings, the installation torque typically ranges from 10 - 50 N·m, depending on the size and the type of the mating components. Proper installation torque ensures that the seal ring is correctly seated and will function as intended.
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Installation Instructions
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The seal ring should be installed in a clean environment to prevent the ingress of contaminants. It should be carefully aligned with the mating surfaces and inserted into the groove or onto the shaft according to the specific design of the mechanical seal. During installation, care should be taken not to damage the sealing edges or the surface of the ring.
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Testing and Quality Assurance
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Pressure Testing
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Each Qt - Tc Ring undergoes rigorous pressure testing before leaving the factory. It is tested at pressures 1.5 times the rated maximum operating pressure for a duration of 30 minutes to ensure that it can withstand the expected pressure loads without leakage.
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Leakage Testing
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Leakage testing is also carried out using a sensitive leak detection method. The maximum allowable leakage rate is set at 0.01 ml/h for most applications. If the seal ring exceeds this leakage rate during testing, it is rejected to ensure that only high - quality, leak - tight products are delivered to the customers.
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Material Testing
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The tungsten carbide material used in the production of the Qt - Tc Ring is tested for its physical and mechanical properties. Samples are taken from each batch of material, and tests are conducted to verify the density, hardness, fracture toughness, and other key properties to ensure compliance with the specified standards.
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Shanghai Queeny Mechanical Equipment Co.,Ltd.is an enterprise specializing in the R&D,manufacture and export of mechanical seal products,headquartered in Pudong New Area,Shanghai.Our products mainly include component seals,dry gas seals,metal bellows seals,mixer and agitator seals,single & dual cartridge seals,silicon carbide parts and tungsetn carbide parts,which can replace John Crane, Burg--mann, AES, Chesterton,Flowserve,Rotenand other similar products,they are widely used in water treatment,petroleum,chemical,food,medical and other industries.
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