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 | CFUS1 |
| 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
The US1 Single Spring O-ring Mechanical Seal stands as a testament to the power of simple, yet highly effective engineering. It is a widely trusted sealing solution, offering a perfect balance of reliability, versatility, and cost-effectiveness across a multitude of industrial applications. This article provides a comprehensive professional overview of the US1, exploring its core components, manufacturing processes, proper usage, installation, applications, maintenance, and critical failure analysis. Its design is the gold standard for a robust and dependable O-ring mechanical seal.
The performance and longevity of the US1 O-ring mechanical seal are fundamentally tied to the materials from which it is built. A key strength of this seal is its adaptability, with a range of material combinations available to suit different fluids, temperatures, and pressures.
The primary sealing faces, which form the dynamic seal and are crucial for preventing leakage, are available in several high-performance pairings:
Carbon-Graphite vs. Ceramic (Alumina): This is the most common and cost-effective material pairing for a general-purpose O-ring mechanical seal. It is ideal for clean, non-abrasive fluids like water. The self-lubricating properties of carbon-graphite minimize friction and wear, while the hard, smooth surface of the ceramic provides a durable mating face.
Carbon-Graphite vs. Silicon Carbide (SiC): This combination offers a significant upgrade in durability. It is an excellent choice for an O-ring mechanical seal where some minor abrasives might be present. The superior hardness and thermal conductivity of Silicon Carbide make it highly resistant to wear and thermal shock.
Silicon Carbide (SiC) vs. Silicon Carbide (SiC): This is the premium pairing, selected for the most demanding applications with higher pressures, speeds, or significant abrasive content. This combination provides the highest level of wear resistance and thermal dissipation for a truly robust O-ring mechanical seal.
The secondary seals, which provide static sealing between the stationary parts and dynamic sealing between the rotary parts, are made from elastomers chosen for their chemical compatibility and temperature range:
Nitrile Rubber (NBR): A cost-effective and reliable option for general water and oil applications within a moderate temperature range. It is the workhorse material for many standard O-ring mechanical seal applications.
EPDM (Ethylene Propylene Diene Monomer): Preferred for hot water, steam, and polar fluids, offering excellent resistance to heat and many common chemicals. This makes it a popular choice for an O-ring mechanical seal in HVAC and heating systems.
Viton (FKM): An excellent option for an O-ring mechanical seal that will be exposed to hydrocarbons, chemicals, and higher temperatures. It provides superior chemical resistance and a higher temperature limit compared to NBR.
The metal components, including the single spring, spring housing, and drive collar, are generally made from corrosion-resistant alloys:
Stainless Steel (SS 316): The standard choice for most applications due to its excellent corrosion resistance.
Hastelloy: This is used in highly corrosive environments where even SS 316 is not sufficient to protect the O-ring mechanical seal.
The manufacturing of the US1 O-ring mechanical seal is a precision-driven process that combines advanced technology with stringent quality control to produce a reliable and durable final product.
Material Preparation: Raw materials for the seal faces (carbon, ceramic, SiC) are carefully selected and prepared. Ceramic and SiC components are typically sintered at high temperatures, while carbon-graphite blanks are molded and then heat-treated.
Precision Machining: All components, including the seal faces, spring housing, and retainers, are machined to tight tolerances using advanced CNC equipment. This dimensional accuracy is vital for the proper function of a high-quality O-ring mechanical seal.
Lapping and Polishing: This is a critical step where the seal faces are brought to a near-perfect flatness and surface finish. Specialized lapping machines use fine abrasive slurries to achieve a flatness measured in light bands, which is essential for the sealing integrity of the O-ring mechanical seal.
Spring Winding and Treatment: The single spring is precisely wound from high-grade wire and heat-treated to ensure a consistent spring force and fatigue resistance throughout the seal's operational life.
Elastomer Molding: The O-rings are molded to exact specifications.
Assembly: All individual components are meticulously assembled in a clean environment. The unitized design of the US1 simplifies this process, ensuring each O-ring mechanical seal is built to a high standard.
Quality Control: Each completed seal undergoes rigorous quality checks, including dimensional inspection and, in some cases, pressure testing, to ensure it meets all design and performance criteria.
Correct usage and meticulous installation are key to achieving the maximum potential and lifespan of the US1 O-ring mechanical seal.
The US1 O-ring mechanical seal is designed for specific operating conditions. It is crucial to operate the pump within the specified pressure, temperature, and speed limits. Operating outside of these limits can lead to premature wear or catastrophic failure. Preventing dry running is paramount, as the fluid provides both lubrication and cooling for the seal faces. This is a fundamental rule for all O-ring mechanical seal applications.
Preparation: Before installing a new O-ring mechanical seal, thoroughly clean the pump shaft, seal chamber, and gland plate. Inspect the shaft for any burrs, nicks, or excessive runout.
Lubrication: Lightly lubricate the O-rings with a clean, compatible lubricant (the process fluid is often sufficient) to ease installation and prevent damage. Do not lubricate the seal faces themselves.
Shaft Sleeve (if applicable): Ensure the shaft sleeve 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.
Install Rotary Unit: Slide the rotary unit onto the pump shaft. Ensure the drive mechanism is correctly engaged. Exercise extreme care not to damage the delicate seal faces.
Final Checks: Manually rotate the pump shaft to check for any binding. The shaft should turn freely. The correct setting length for this O-ring mechanical seal is crucial for proper operation. Finally, ensure all connections are secure and the pump is properly primed before starting.
The versatility and reliability of the US1 O-ring mechanical seal make it suitable for an incredibly wide array of applications across numerous industries. Its robust yet simple design makes it a workhorse for many fluid handling tasks.
Common applications include:
Residential and Commercial Water Supply: Used in booster pumps, domestic water systems, and HVAC circulation pumps.
Industrial Water Systems: Found in cooling water circulation, process water transfer, and demineralized water systems.
Wastewater Treatment: Employed in pumps handling clean water or treated effluent.
Irrigation Systems: Utilized in pumps for agricultural and landscaping irrigation.
Food and Beverage: Applied in various process pumps, with FDA-approved materials available.
General Industrial Pumping: A go-to solution for a wide variety of auxiliary pumps handling clean liquids.
While the US1 O-ring mechanical seal is highly reliable, proper maintenance and a systematic approach to failure analysis are essential for maximizing its service life and preventing costly downtime.
Regular Monitoring: Periodically check the seal area for any signs of leakage. A slight vapor mist can be normal, but continuous dripping indicates a problem with the O-ring mechanical seal.
Vibration and Noise Check: Excessive vibration or unusual noises from the pump can be a sign of seal issues, such as misalignment or worn faces.
Prevent Dry Running: Ensure the pump never runs without fluid. A functioning low-level switch or a pressure switch can prevent this catastrophic failure.
Shaft Alignment and Bearing Condition: Regularly check and maintain precise alignment between the pump and motor. Worn pump bearings can lead to excessive shaft runout, which will severely impact the performance of the O-ring mechanical seal.
Fluid Quality: If the application allows, maintain the cleanliness of the pumped fluid by using filters or strainers.
When a US1 O-ring mechanical seal fails, a systematic approach to analysis is crucial to identify the root cause. Common failure modes and their likely causes include:
Excessive Leakage:
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 the design limits of the O-ring mechanical seal.
Worn Seal Faces: Indicated by grooves, scratches, or excessive wear patterns on the faces.
Damaged O-ring: Cracks, tears, or hardening of the O-ring.
Misalignment: Leads to uneven wear patterns on the seal faces.
Improper Installation: Seal faces not fully seated, O-rings pinched, or incorrect spring compression.
Overheating/Burned Faces:
Causes: Loss of prime, closed suction valve, or air in the system.
Dry Running: The most common cause. Lack of fluid film results in immediate friction and heat, causing the faces to crack, glaze, or burn.
Insufficient Lubrication: If the fluid has poor lubricating properties or if excessive process heat is generated.
Excessive Face Pressure: Due to an incorrect spring or improper gland tightening.
Chipping/Cracking of Seal Faces:
Causes: Dropping the seal, or severe cavitation in the pump.
Thermal Shock: Sudden changes in temperature, such as dry running followed by a sudden rush of cold fluid, can cause brittle materials like ceramic or SiC to crack.
Mechanical Shock: Impact during installation or operation.
By meticulously examining the failed US1 O-ring mechanical seal and analyzing the pump's operational history, technicians can accurately diagnose the problem and implement preventative measures. This understanding is crucial for ensuring the reliable and long-lasting performance of the O-ring mechanical seal in their critical applications.
The US1 Single Spring O-ring Mechanical Seal is a widely used and reliable sealing solution. It's a popular choice due to its simple, yet effective design. The single spring provides a consistent face load, while the O-ring serves as a dynamic and static secondary seal. This combination offers great performance, durability, and cost-effectiveness, making it a go-to O-ring mechanical seal for many applications.
A single spring design, like the US1, is typically more robust and less susceptible to clogging from solids in the fluid. While a multi-spring seal can provide a more even face load, the single spring in this O-ring mechanical seal offers sufficient force for most applications while being more tolerant of harsh conditions and easier to install.
Common face material combinations for the US1 O-ring Mechanical Seal include:
Carbon vs. Ceramic: This is the most standard and cost-effective option for clean water.
Carbon vs. Silicon Carbide: This pairing offers better durability for fluids with minor abrasives.
Silicon Carbide vs. Silicon Carbide: This is the premium choice for higher-pressure, higher-speed, or more abrasive applications.
Yes, the US1 O-ring Mechanical Seal can handle hot water, but the temperature limit is determined by the O-ring material. With a standard Nitrile (NBR) O-ring, it's typically limited to around 80°C (176°F). For hot water up to 150°C (302°F), an EPDM O-ring is a reliable alternative, making it a versatile O-ring mechanical seal.
The most common reasons for premature failure are dry running (lack of lubrication), the presence of abrasive particles in the fluid, improper installation (e.g., misaligned faces or damaged O-rings), and excessive pump vibration. Operating outside the seal's specified pressure or temperature limits will also cause a significant reduction in its lifespan.
Proper installation is extremely important. Incorrect installation, such as scratching the seal faces, pinching the O-ring, or failing to set the correct compression, can lead to immediate leakage or a significantly reduced lifespan. Meticulous handling and adherence to manufacturer guidelines are essential for any O-ring mechanical seal installation.
While the US1 O-ring Mechanical Seal with hard face materials (like Silicon Carbide) can handle minor abrasives, it is not designed for heavy slurries. Continuous exposure to significant suspended solids will accelerate wear. For heavily abrasive fluids, a specialized seal design or a flushing system would be recommended over a standard O-ring mechanical seal.
The key signs that your US1 O-ring Mechanical Seal is failing include:
Consistent, visible fluid leakage (more than a slight vapor mist).
Unusual noises, such as a squealing or grinding sound.
Excessive heat buildup around the seal housing.
A noticeable increase in pump vibration.
Due to the precision required for sealing faces and the difficulty of field repairs, it is generally recommended to replace the entire US1 O-ring Mechanical Seal unit rather than attempting a repair. Replacing the complete assembly ensures optimal performance and a renewed service life.
In a well-maintained pump operating within its design parameters and handling clean fluids, a US1 O-ring Mechanical Seal can typically last anywhere from 3 to 5 years, and often longer. The service life is highly dependent on factors like operating hours, fluid quality, and whether best practices for pump maintenance are followed.
Yes, dry running can instantly and severely damage the US1 O-ring Mechanical Seal. Without the fluid film from the pumped fluid to lubricate and cool the seal faces, friction increases rapidly, generating extreme heat. This can cause the seal faces to crack, glaze, or burn, leading to immediate and catastrophic failure.
To extend the life of your US1 O-ring Mechanical Seal, you should:
Prevent dry running by always ensuring the pump is primed.
Maintain good pump-motor alignment.
Monitor and correct excessive pump vibration.
Keep the pumped fluid clean by using filters if the application allows.
Operate within the seal's design limits for pressure, temperature, and speed.
Yes, the US1 O-ring Mechanical Seal is generally well-suited for pumps with VFDs. However, it's important to ensure that the operating range of the VFD does not lead to operation outside the seal's design limits. For instance, operating at extremely low speeds could lead to insufficient lubrication.
The O-ring in this O-ring mechanical seal acts as a dynamic secondary seal, providing flexibility to the rotary unit. It allows the seal faces to move axially with the shaft, compensating for minor shaft runout or pump vibrations. However, excessive runout will cause accelerated wear on the O-ring and seal faces, so it's crucial to address any sources of excessive vibration.
The unbalanced design of the US1 O-ring Mechanical Seal is a simple, cost-effective choice that provides an excellent closing force on the seal faces. This design is highly reliable and perfect for the lower-to-moderate pressures typical for most general pump applications, offering great performance without the added complexity of a balanced seal.
For the US1, the standard secondary seal is the O-ring. However, the material of this O-ring can be customized to match the fluid and temperature. Common options include NBR for general use, EPDM for hot water, and Viton for chemical resistance. This material flexibility makes it a versatile O-ring mechanical seal solution.
The simple design of the US1 O-ring Mechanical Seal makes it relatively straightforward to install. However, the importance of correct shaft preparation, careful handling of the seal faces, and proper compression setting cannot be overstated. We always recommend that installation is performed by a qualified technician who understands the specific pump and seal requirements.
You can find detailed technical specifications, installation drawings, and cross-reference information for the US1 O-ring Mechanical Seal on the manufacturer's website, through their authorized distributors, or by consulting the pump's original equipment manufacturer (OEM). These resources provide crucial data such as dimensions, material options, and operating limits, which are essential for proper selection and installation.
