| Customization: | Available |
|---|---|
| Structure: | Single End |
| Pressure: | Medium Pressure Mechanical Seals |
|
Still deciding? Get samples of $ !
Order Sample
|
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
| Parameter | QT-Type 21 Mechanical Seal Details |
|---|---|
| Seal Type | QT-Type 21 |
| Application Scope | Widely applicable in pumps, agitators, and compressors within industries such as chemical, pharmaceutical, and food processing. Suitable for handling various liquids and gases in both clean and slightly contaminated media environments. |
| Material Composition | Seal Face Materials: - Rotating Face: Carbon graphite with high purity and excellent wear resistance properties. - Stationary Face: Silicon carbide for high hardness and good corrosion resistance. Secondary Sealing Elements: Elastomer material with good elasticity and chemical resistance. Metal Components: Made of stainless steel (e.g., AISI 316) for anti-corrosion and strength. |
| Physical Properties | Density: 2.3 g/cm³ Hardness: 75 Shore D (approximate for seal face materials; elastomer hardness may vary) Porosity (Seal Face): Less than 0.5% for carbon graphite and silicon carbide seal faces to ensure minimal leakage paths. |
| Mechanical Performance | Maximum Operating Pressure: 12 bar (174 psi) Maximum Rotational Speed: 30 m/s Temperature Range: -30°C to 180°C (-22°F to 356°F) Friction Coefficient: 0.15 (approximate value under normal operating conditions) Wear Rate: Less than 0.0015 mm/year for seal faces under standard operating conditions. |
| Geometric Dimensions | Inner Diameter (ID): Available in sizes from 15 mm to 250 mm in standard increments. Outer Diameter (OD): Varies according to the inner diameter, with a typical radial clearance of 3 - 8 mm. Seal Thickness: 4 - 10 mm depending on the size and application requirements. Seal Face Width: 5 - 12 mm for effective sealing and load distribution. |
| Sealing Face Characteristics | Surface Roughness (Ra): Rotating face: 0.2 - 0.3 µm Stationary face: 0.2 - 0.3 µm Flatness: Deviation within 0.0003 mm over the seal face area to ensure proper contact and sealing. |
| Chemical Compatibility | Compatible Media: - Water-based solutions (including deionized water, tap water, and water with mild additives). - Mild acids (such as acetic acid up to 20% concentration) and alkalis (such as sodium hydroxide up to 10% concentration). - Some organic solvents like ethanol and isopropyl alcohol. Incompatible Media: - Strong oxidizing agents (e.g., concentrated nitric acid). - Highly corrosive chemicals with extreme pH values (below 2 or above 13). |
| Installation Requirements | Installation Torque: 8 - 18 Nm for fixing bolts (if applicable) to ensure proper assembly and alignment. Lubrication: Use a suitable, compatible lubricant during installation to facilitate smooth assembly and reduce initial friction. Axial Runout Tolerance: Limited to ±0.03 mm to maintain proper seal performance. Radial Runout Tolerance: Limited to ±0.05 mm to avoid uneven wear on the seal faces. |
| Maintenance and Service Life | Recommended Maintenance Interval: Every 8 - 12 months or after 8000 operating hours, whichever comes first, for general inspection and potential replacement of worn components. Expected Service Life: Approximately 2 - 3 years under normal operating conditions with proper maintenance. |
| Testing and Quality Assurance | Pressure Testing: Conducted at 1.5 times the rated operating pressure for 45 minutes to ensure integrity and no leakage. Leakage Testing: Permissible leakage rate is 0.08 ml/h under normal operating conditions. Quality Certifications: Complies with ISO 9001:2015 quality management system standards. Meets relevant safety and performance requirements for CE certification. |
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, AES, Chesterton,Flowserve,Rotenand other similar products,they are widely used in water treatment,petroleum,chemical,food,medical and other industries.
Q1: Are you a trading company or a factory?
We are a factory, so we can offer you factory prices with high quality.
Q2: Can I get samples?
Yes. You can ask for samples. Usually it's free, but you need to pay for shipping.
Q3: Can l use my own logo or design on the goods?
Yes, we provide OEM/ODMservices; your logo and design can be printed on the products.
Q4: What are your payment terms?
We accept T/T, Paypal, Western Union, and credit card payment is also welcome.
Q5: How about the delivery time?
For stock items, we can ship immediately after receiving the payment.
For other products, we need 14-25 days for mass production, which depends on the quantity and type of order.
Q6: How can we ensure the quality?
Pre-production samples are required before mass production;Final inspection is required before shipment;
Q7: 1 can't find our products in your catalog, can you customize the products for us?
Yes, customized products are available, OEM is welcome.
Q8: Can l buy pumps or pump parts from your company?
Yes, we also provide pumps and pump parts.
){kind=link}