Cell No & Whatsapp & Wechat
+86-18758835650（Cherry）
Send Us
Search Products
- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
 |
| Quantity (pieces) | 1 - 10 | > 10 |
| Lead time (days) | 15 | To be negotiated |
Product Description
Size | Custom |
Place of Origin | Zhejiang, China |
Brand Name | CF104U |
| Supply Ability | 10000 Piece/Pieces per Month |
1) Heat shock stablity
2) chemical corrosion-resistant
3) High temper-endure(up to 1650°)
4) Wearing/corrosion/oxidation resistant
5) Highly performance of mechanical strength
6) Cleaning or etching the hardest sub-surfaces
7) Used for grinding, lapping, and wire saw cutting as well as abrasive blasting
Material And Component Codes
Description | Material | Material Feature & Suitable Scope |
| Rotary /Stationary Face | Carbon | Resistant against: erosive heat. suitable for water and oil medium. |
| Ceramic | Resistant against:shore hardness,abrasion. Suitable for dusted water and oil. | |
| Silicon Carbide | Resistant against:heat,abrasion,erosive. Suitable for industrial pumps, submersible pump sewage pump etc | |
| Tungsten carbide | Resistant against:heat,abrasion,erosive. Suitable for industrial pumps, submersible pump sewage pump etc | |
| Bellow Cup gasket Oring | NBR | Resistant against:pressure,abrasion,high elasticity and mechanical strength. Suitable for water and Oil Under -20°C-120°C |
| EPDM | Resistant against:heat freeze,chemical reagent depending. Suitable for water and Oil Under -40°C-150°C | |
| MVQ | Resistant against:heat, oil, reagent, medicine, acetone.Suitable for high temperature. Hydraulic equipment and vacum equipment Suitable for erosive medium under -20°C-180°C | |
| ECO | Resistant against:ozone aging merely ocetum, ammomia ethanol. Suitable for medium -40°C-150°C | |
SUS304 SUS316 | Resistant against: freon, rock oil. Suitable for medium -30°C-130°C | |
Retainer driver ring\spring Spring seat | SUS304 SUS316 | Resistant against: abrasion, antirust of feature |
Let me Help you find it what mechanical seal do you want
The First step: Do you know Type name? you can choose from the list below.
The Second Step: Do you know what material do you want? Choose from the list below.
The Third step: Do you know what shaft size?
If you don’t know any, please do not hesitate to ask us, we will help you to find out the best way.
Why Choose Us
Pump mechanical seals are critical components in centrifugal pumps, preventing leakage of the pumped fluid and maintaining system efficiency. The Type 104U pump mechanical seal is specifically designed for single-phase water pumps, offering reliable and durable sealing solutions. This article will delve into the various aspects of the Type 104U pump mechanical seal, including its materials, manufacturing processes, usage, installation, applications, maintenance, and common failure analysis.
The selection of materials for a pump mechanical seal is paramount to its performance and longevity. The Type 104U pump mechanical seal is typically constructed from a combination of high-grade materials chosen for their specific properties, ensuring optimal operation in water pumping applications.
The stationary and rotary faces are the primary sealing components. For water applications, common material pairings include:
Carbon-Graphite: This is a popular choice for the rotary face due to its excellent self-lubricating properties, good thermal conductivity, and chemical inertness. It minimizes friction and wear against the harder stationary face.
Ceramic (Alumina): Often used for the stationary face, ceramic offers exceptional hardness, wear resistance, and corrosion resistance. Its smooth surface provides an ideal mating surface for the carbon-graphite.
Silicon Carbide (SiC): For more demanding applications or where slight abrasives might be present, silicon carbide is an excellent alternative for both rotary and stationary faces. It boasts superior hardness, thermal shock resistance, and chemical resistance compared to ceramic.
Tungsten Carbide (WC): When extreme durability and abrasion resistance are required, tungsten carbide can be employed. It is significantly denser and harder than silicon carbide but also more expensive.
The secondary seals, often referred to as O-rings or bellows, provide static sealing between the seal faces and the pump shaft/housing. Common materials for these include:
Nitrile Rubber (NBR): A cost-effective and widely used elastomer for general water applications, offering good resistance to water and many common chemicals.
EPDM (Ethylene Propylene Diene Monomer): Preferred for hot water or steam applications due to its excellent heat and ozone resistance.
Viton (FKM): While less common for standard water pumps due to its higher cost, Viton offers superior chemical resistance, making it suitable if the water contains certain additives or trace chemicals.
The metal components, such as the spring, retainer, and gland plate, are typically made from:
Stainless Steel (SS 304/316): These grades offer good corrosion resistance to water and are robust enough to withstand the operational forces. SS 316 is preferred in environments with higher chloride concentrations.
The manufacturing of a Type 104U pump mechanical seal involves precision engineering and stringent quality control to ensure its reliability. The process typically includes several key stages:
Material Preparation: Raw materials are carefully selected and prepared. For instance, carbon-graphite blanks are molded and then graphitized at high temperatures. Ceramic and silicon carbide components are sintered.
Machining: High-precision machining operations, such as turning, grinding, and lapping, are used to create the intricate geometries of the seal faces, ensuring extremely flat and smooth surfaces. The flatness of the seal faces, often measured in light bands, is crucial for effective sealing.
Lapping and Polishing: This is a critical step where the seal faces are brought to their final specified flatness and surface finish. Specialized lapping machines with abrasive slurries are used to achieve near-optical flatness, which is essential for the sealing integrity of the pump mechanical seal.
Spring Winding and Treatment: Springs are precisely wound from spring wire and then heat-treated to achieve the desired spring constant and fatigue resistance.
Molding of Elastomers: O-rings and bellows are typically molded from elastomer compounds under heat and pressure.
Assembly: All individual components – the rotary face, stationary face, spring, secondary seals, and metal hardware – are carefully assembled in a clean environment. This often involves specialized tools and fixtures to ensure proper alignment and seating of all parts.
Quality Control and Testing: Before dispatch, each pump mechanical seal undergoes rigorous quality checks. This includes dimensional inspection, flatness checks, and sometimes pressure testing or leak testing to ensure it meets design specifications and performance criteria.
Proper usage and meticulous installation are crucial for the longevity and performance of any pump mechanical seal.
The Type 104U pump mechanical seal is designed for single-phase water pumps. It is important to operate the pump within the specified pressure, temperature, and speed limits for which the pump mechanical seal was designed. Exceeding these limits can lead to premature wear or failure of the pump mechanical seal. Ensuring the pumped water is clean and free from excessive abrasive particles is also vital. While some material combinations can handle minor abrasives, heavy contamination will significantly reduce the life of the pump mechanical seal.
Preparation: Before installing the new pump mechanical seal, thoroughly clean the pump shaft, seal chamber, and gland plate. Remove any old gasket material or debris. Inspect the shaft for any burrs, nicks, or excessive runout, which can damage the secondary seals or lead to premature failure of the pump mechanical seal.
Lubrication: Lightly lubricate the O-rings or bellows with a clean, compatible lubricant (e.g., clean water or a silicone-based grease, if specified by the manufacturer) to aid in installation and prevent damage. Do not lubricate the seal faces themselves.
Shaft Sleeve (if applicable): If the pump utilizes a shaft sleeve, ensure it is in good condition and correctly installed.
Install Stationary Seat: Carefully press the stationary seat into the pump's seal chamber or gland plate. Ensure it is fully seated and not cocked. Avoid applying force directly to the sealing face.
Install Rotary Unit: Slide the rotary unit onto the pump shaft. Ensure the drive mechanism (e.g., set screws, drive pins, or an elastomer drive) is correctly engaged with the shaft. Be extremely careful not to damage the delicate seal faces during this step.
Gland Plate Installation: If a gland plate is used, slide it over the shaft and secure it to the pump casing. Tighten the gland bolts evenly and gradually in a crisscross pattern to ensure even compression and prevent distortion of the seal faces. Do not overtighten, as this can lead to excessive compression of the secondary seals and premature wear of the seal faces.
Final Checks: Once installed, manually rotate the pump shaft to check for any binding or rubbing. The shaft should turn freely. Ensure all connections are secure.
The Type 104U pump mechanical seal is primarily designed for and widely used in a variety of single-phase water pump applications across different industries. Its robust design and material versatility make it suitable for a broad range of clean water services.
Common applications include:
Residential and Commercial Water Supply: Used in booster pumps, circulation pumps for HVAC systems, and domestic water pressure systems.
Industrial Water Systems: Found in cooling water circulation, process water transfer, and demineralized water systems within factories and plants.
Wastewater Treatment (Clean Side): Employed in pumps handling treated effluent or clean water within wastewater treatment plants, not raw sewage.
Irrigation Systems: Utilized in pumps for agricultural and landscaping irrigation.
Firefighting Systems: Essential for ensuring the reliability of fire pumps, where water delivery is critical.
Swimming Pool Pumps: Commonly found in pumps for filtering and circulating water in swimming pools.
Heating and Cooling Systems: Integral to the circulation pumps in hot water heating systems and chilled water cooling systems.
Even the most robust pump mechanical seal requires proper maintenance and, in the event of a failure, a thorough analysis to prevent recurrence.
Regular Monitoring: Periodically inspect the pump mechanical seal area for any signs of leakage. A slight weepage (vapor mist) can be normal for some types of pump mechanical seal, but continuous dripping indicates a problem.
Vibration and Noise Check: Excessive vibration or unusual noises from the pump can indicate issues with the pump mechanical seal, such as misalignment or worn bearings.
Temperature Monitoring: Excessive heat build-up around the pump mechanical seal housing can be a sign of insufficient lubrication, incorrect installation, or worn faces.
System Cleanliness: Maintain the cleanliness of the pumped fluid. Sediment or abrasive particles can significantly shorten the life of the pump mechanical seal.
Prevent Dry Running: Never allow the pump to run dry, as this can instantly destroy the pump mechanical seal faces due to lack of lubrication and rapid heat generation. Ensure adequate suction supply.
Proper Shaft Alignment: Regularly check and maintain proper pump and motor alignment. Misalignment can cause excessive shaft runout, leading to premature wear of the pump mechanical seal and bearings.
When a Type 104U pump mechanical seal fails, a systematic approach to analysis is crucial to identify the root cause and implement corrective actions. Common failure modes and their likely causes include:
Excessive Leakage:
Causes: Unbalanced impeller, worn bearings, cavitation, or pipe strain.
Causes: Installer error, lack of proper training.
Causes: Poor pump-motor alignment, bent shaft, or worn bearings.
Causes: Chemical attack, high temperature, improper installation, or aging.
Causes: Abrasive particles in the fluid, dry running, excessive pressure, misalignment, or operating outside design limits.
Worn Seal Faces: Indicated by grooves, scratches, or excessive wear patterns on the faces.
Damaged O-rings/Bellows: Cracks, tears, or hardening of the secondary seals.
Misalignment: Leads to uneven wear on the seal faces.
Improper Installation: Seal faces not fully seated, O-rings pinched, or uneven gland compression.
Vibration: Excessive pump vibration can cause the seal faces to "hammer" and fret, leading to wear.
Overheating/Burned Faces:
Causes: Incorrect spring, over-tightened gland bolts.
Causes: Pumping certain chemicals or highly aerated liquids (though less common for clean water).
Causes: Loss of prime, closed suction valve, air in the system, or system not filled properly.
Dry Running: The most common cause. Lack of fluid between the seal faces results in immediate friction and heat buildup, leading to cracking or glazing.
Insufficient Lubrication: If the fluid has poor lubricating properties or contains components that break down the fluid film.
Excessive Spring Force/Gland Tightening: Can lead to higher face pressure, increasing friction and heat.
Chipping/Cracking of Seal Faces:
Causes: Dropping the seal, external forces on the pump.
Causes: Intermittent dry running followed by fluid contact, or rapid changes in fluid temperature.
Thermal Shock: Sudden changes in temperature can cause brittle materials like ceramic or silicon carbide to crack.
Mechanical Shock: Impact during installation or operation.
Material Defects: Rarely, a manufacturing defect in the seal face material.
Corrosion:
Causes: Pumping aggressive chemicals that are not pure water.
Causes: Exposure to corrosive chemicals not compatible with SS 304/316, or higher chloride concentrations than anticipated.
Metal Components: Pitting or degradation of stainless steel parts.
Seal Faces: Certain chemicals can attack even the most resistant seal face materials over time.
By thoroughly examining the failed pump mechanical seal and considering the pump's operational history, technicians can accurately diagnose the problem and implement preventative measures. This might involve changing seal materials, improving operational procedures, addressing system issues, or enhancing installation practices for the pump mechanical seal.
For customers interested in the Type 104U Pump Mechanical Seal for single-phase water pumps, here are 15 frequently asked questions and their professional answers, addressing their common concerns. These responses aim to provide clarity and highlight the benefits and considerations of this essential pump mechanical seal.
The Type 104U Pump Mechanical Seal is a common, unbalanced pump mechanical seal specifically designed for sealing the shaft of single-phase water pumps. Its primary function is to prevent leakage of the pumped fluid (water) along the pump shaft where it passes through the pump casing, ensuring efficient pump operation and preventing environmental contamination. This pump mechanical seal creates a dynamic seal between rotating and stationary components.
For the Type 104U Pump Mechanical Seal, common face materials include carbon-graphite (rotary face) paired with ceramic or silicon carbide (stationary face). Carbon-graphite is chosen for its self-lubricating properties and good thermal conductivity. Ceramic and silicon carbide offer excellent hardness, wear resistance, and chemical inertness, making them ideal for the stationary surface against which the carbon rotates. These material choices ensure durability and minimize friction in water applications for the pump mechanical seal.
The temperature limit for a Type 104U Pump Mechanical Seal largely depends on its secondary seal (O-ring) material. With standard Nitrile (NBR) O-rings, it's typically suitable for water up to 80-90°C. For higher temperatures, up to 120-150°C, EPDM or Viton (FKM) O-rings would be specified. Always confirm the exact temperature rating of the specific pump mechanical seal variant you are considering.
The most common causes of premature failure for a Type 104U Pump Mechanical Seal include dry running (lack of lubrication from the pumped water), abrasive particles in the water, improper installation (e.g., misaligned faces, overtightened gland), excessive pump vibration, and operating beyond the pump mechanical seal's specified pressure or temperature limits. Cavitation in the pump can also lead to seal issues.
Proper installation is absolutely critical for the lifespan of a Type 104U Pump Mechanical Seal. Incorrect installation, such as damaging the seal faces, pinching O-rings, or applying uneven compression, can lead to immediate leakage or significantly reduce its operational life. Precise alignment and careful handling during installation are paramount to ensure the pump mechanical seal functions as intended.
While the Type 104U Pump Mechanical Seal is primarily designed for clean water, certain material combinations (e.g., silicon carbide vs. silicon carbide faces) offer better resistance to minor abrasives or suspended solids. However, continuous exposure to significant abrasive content will inevitably reduce the lifespan of any pump mechanical seal. For heavily contaminated water, a specialized seal design or a different pump mechanical seal type might be required.
Key signs that your Type 104U Pump Mechanical Seal needs replacement include continuous visible leakage (more than just a slight vapor mist), excessive noise or squealing from the seal area, increased pump vibration, or a noticeable drop in pump performance (due to fluid bypass). A visual inspection of the seal faces, if accessible, may reveal wear marks, grooves, or cracks.
For most end-users, it's generally recommended to replace the entire Type 104U Pump Mechanical Seal assembly rather than attempting to repair it. The precision required for lapping seal faces and ensuring proper assembly makes field repair difficult and often unreliable. Replacing the complete pump mechanical seal ensures optimal performance and a renewed service life.
In a well-maintained single-phase water pump operating within its design parameters and with clean water, a Type 104U Pump Mechanical Seal can typically last anywhere from 3 to 5 years, and sometimes even longer. However, this varies greatly depending on factors like operating hours, water quality, and adherence to maintenance schedules for the pump mechanical seal and pump.
The "U" in Type 104U Pump Mechanical Seal generally indicates that it is an unbalanced pump mechanical seal with an elastomer bellows or rubber diaphragm as its secondary sealing element and drive mechanism. This design simplifies installation and is cost-effective for many general-purpose water applications, making it a very common choice for this type of pump mechanical seal.
Yes, dry running can instantly and severely damage a Type 104U Pump Mechanical Seal. Without the fluid film from the water to lubricate and cool the seal faces, friction rapidly increases, leading to extreme heat buildup. This can cause the seal faces to crack, glaze, or burn, resulting in immediate failure of the pump mechanical seal. Always ensure the pump is fully primed before starting.
To ensure a long life for your Type 104U Pump Mechanical Seal, you should:
Ensure proper installation: Follow manufacturer guidelines meticulously.
Prevent dry running: Always ensure the pump has fluid.
Maintain fluid quality: Keep the water clean and free from abrasives.
Monitor pump vibration: Address any excessive vibration promptly.
Operate within design limits: Do not exceed the pump mechanical seal's pressure, temperature, or speed ratings.
Regularly check pump alignment: Misalignment can stress the pump mechanical seal.
Yes, the Type 104U Pump Mechanical Seal can generally be used in pumps equipped with Variable Frequency Drives (VFDs). However, it's important to ensure that the seal's operating limits (especially regarding minimum speed for adequate lubrication and maximum speed for stability) are respected across the VFD's operating range. Rapid or frequent speed changes should also be considered, as they can sometimes impact the seal's performance.
An unbalanced pump mechanical seal (like the 104U) has the sealing faces designed so that the fluid pressure acts over a larger area, resulting in a higher closing force on the seal faces. This design is simpler and cost-effective, making it suitable for lower to moderate pressures typical of single-phase water pumps. A balanced pump mechanical seal, conversely, is designed to reduce the hydraulic closing force, making it better suited for higher pressures and speeds, as it minimizes face wear and heat generation.
You can typically find detailed specifications and technical datasheets for the Type 104U Pump Mechanical Seal from the manufacturer's website, authorized distributors, or by contacting your pump supplier. These documents will provide precise dimensions, material options, operating limits (pressure, temperature, speed), and installation guidelines specific to that particular pump mechanical seal model.
