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| Quantity (pieces) | 1 - 10 | > 10 |
| Lead time (days) | 15 | To be negotiated |
Product Description
Size | Custom |
Place of Origin | Zhejiang, China |
Brand Name | CF155/CF155B/D |
| 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 Type 155/155B/155D Mechanical Seal series represents a family of reliable and widely used sealing solutions specifically engineered for a vast array of water pumps. As a robust and versatile mechanical seal for water pump applications, its design is optimized for efficiency and longevity in fluid handling systems. This article will provide a detailed professional overview of the Type 155 series, exploring its key attributes from material selection and manufacturing to installation, maintenance, and failure analysis.
The performance and durability of a mechanical seal for water pump depend heavily on its material composition. The Type 155 series offers a range of material combinations to suit diverse operational needs, from standard water services to more demanding conditions.
The primary sealing faces, which are the most critical components 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 mechanical seal for water pump handling clean, non-abrasive water. The self-lubricating properties of carbon-graphite minimize friction and wear, while the hard, smooth surface of 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 a mechanical seal for water pump where some minor abrasives might be present. Silicon carbide's superior hardness and thermal conductivity 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 water applications where higher pressures, speeds, or abrasive content is anticipated. This combination provides the highest level of wear resistance and thermal dissipation for a truly robust mechanical seal for water pump.
The secondary seals, which provide static sealing between the rotating and stationary parts, are typically made from elastomers chosen for their chemical and temperature compatibility:
Nitrile Rubber (NBR): A cost-effective and reliable choice for general water applications within a moderate temperature range.
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 a mechanical seal for water pump in HVAC and heating systems.
Viton (FKM): While less common for pure water, Viton is an excellent option if the water contains certain additives, oils, or trace chemicals, providing superior chemical resistance.
The metal components, including the spring and retainer, are generally made from corrosion-resistant alloys:
Stainless Steel (SS 304/316): The standard choice for most applications. SS 316 is preferred in environments with higher chloride concentrations due to its superior corrosion resistance, ensuring the longevity of the mechanical seal for water pump.
The manufacturing of the Type 155 series mechanical seal for water pump involves precision engineering and strict quality control to ensure 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, 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 equipment. This dimensional accuracy is vital for the proper function of a mechanical seal for water pump.
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 mechanical seal for water pump.
Spring Winding and Treatment: The springs are 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: O-rings and other elastomer parts are molded to exact specifications.
Assembly: All individual components are meticulously assembled in a clean environment. The unitized design of the Type 155 series simplifies this process.
Quality Control: Each completed mechanical seal for water pump 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 Type 155 series mechanical seal for water pump.
The Type 155 series mechanical seal for water pump 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.
Preparation: Before installing a new mechanical seal for water pump, 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 (clean water 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. Finally, ensure all connections are secure and the pump is properly primed before starting. The correct setting length for this mechanical seal for water pump is crucial for proper operation.
The versatility and reliability of the Type 155 series mechanical seal for water pump make it suitable for an incredibly wide array of applications across numerous industries.
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.
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.
Heating and Cooling Systems: Integral to the circulation pumps in hot water heating systems and chilled water cooling systems.
While the Type 155 series mechanical seal for water pump 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 mechanical seal for water pump.
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 mechanical seal for water pump.
Fluid Quality: If the application allows, maintain the cleanliness of the pumped fluid by using filters or strainers.
When a Type 155 series mechanical seal for water pump 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 for mechanical seal for water pump installation.
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 mechanical seal for water pump.
Worn Seal Faces: Indicated by grooves, scratches, or excessive wear patterns on the faces.
Damaged Secondary Seals: Cracks, tears, or hardening of the O-rings.
Misalignment: Leads to uneven wear patterns on the seal faces.
Improper Installation: Seal faces not fully seated, O-rings pinched, or uneven gland 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.
Corrosion:
Causes: Exposure to corrosive chemicals not compatible with the selected metal.
Metal Components: Pitting or degradation of the spring, retainer, or gland.
Seal Faces: Certain chemicals can attack even resistant seal face materials over time.
By meticulously examining the failed Type 155 series mechanical seal for water pump 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 mechanical seal for water pump in their critical applications.
For customers considering the Type 155/155B/155D Mechanical Seal for their water pump shaft seals, here are 16 frequently asked questions with professional and detailed answers. These responses aim to address common concerns and highlight the features of this versatile mechanical seal for water pump.
The Type 155/155B/155D Mechanical Seal is a single, unbalanced seal series known for its robust and reliable design. Its suitability as a mechanical seal for water pump applications comes from its simple, proven design that is cost-effective and highly effective for handling clean water and other non-corrosive fluids at moderate temperatures and pressures.
The main difference lies in the design of the rotary unit. The Type 155 is a standard design. The Type 155B often features a different bellow or boot material, and the Type 155D typically has an extended drive collar or a different drive mechanism. These variations allow for a specific mechanical seal for water pump to be chosen to fit various pump shafts and seal chamber dimensions.
The most common material combinations for the Type 155 mechanical seal for water pump faces are:
Carbon-Graphite vs. Ceramic: This is the standard, cost-effective choice for clean water.
Carbon-Graphite vs. Silicon Carbide: This pairing offers a durability upgrade for water with minor abrasives.
Silicon Carbide vs. Silicon Carbide: This is the premium choice for demanding applications with higher speeds or abrasive content.
The most common reasons for premature failure are dry running (lack of lubrication from the pumped water), the presence of abrasive particles in the water, improper installation, and excessive pump vibration. Operating outside the seal's specified pressure or temperature limits will also cause a significant reduction in its lifespan, which is true for any mechanical seal for water pump.
Yes, the Type 155 mechanical seal for water pump can handle hot water, but the temperature limit is determined by the secondary seal (O-ring) material. With a standard Nitrile (NBR) O-ring, it's typically limited to around 80°C (176°F). For hot water applications up to 150°C (302°F), an EPDM O-ring is a reliable alternative, making it a highly adaptable mechanical seal for water pump.
Proper installation is extremely important. Incorrect installation, such as scratching the seal faces, pinching the O-rings, 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 mechanical seal for water pump installation.
The Type 155 mechanical seal for water pump is primarily designed for clean water. While seals with hard face materials like Silicon Carbide can handle minor abrasives, continuous exposure to significant suspended solids will accelerate wear. For heavily abrasive water, a specialized seal design or a flushing system would be recommended over a standard mechanical seal for water pump.
The key signs that your Type 155 mechanical seal for water pump is failing include:
Continuous, 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 Type 155 mechanical seal unit rather than attempting a repair. Replacing the complete assembly ensures optimal performance and a renewed service life for your mechanical seal for water pump.
In a well-maintained pump operating within its design parameters and handling clean water, a Type 155 mechanical seal for water pump 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 Type 155 mechanical seal for water pump. Without the fluid film from the water 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 Type 155 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 water clean.
Operate within the seal's design limits for pressure, temperature, and speed.
These are fundamental for any mechanical seal for water pump.
Yes, the Type 155 mechanical seal for water pump 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 Type 155 series is an unbalanced seal, meaning it's primarily designed for stable operation. While it can handle minor shaft movement, excessive shaft runout or vibration will lead to uneven wear on the seal faces and premature failure. It's crucial to address any sources of excessive vibration to ensure a long life for your mechanical seal for water pump.
The unbalanced design of the Type 155 mechanical seal for water pump is a simpler, more 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 that are typical for most water pump applications, offering great performance without the added complexity of a balanced seal.
You can find detailed technical specifications, installation drawings, and cross-reference information for the Type 155 mechanical seal for water pump 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.
