Dimension :customized

Material : Chrome steel Gcr15
Hardness : 60-65 HRC
Diameter tolerance: 0,-0.005

Diameter tolerance: 0,-0.05

For more information about Needle Rollers, Axles, and Pins just feel free to contact with us at  seven@mklbearing.com

U groove bearings are a type of bearing designed with a U-shaped groove on the outer ring. These bearings are commonly used in applications where the bearing needs to run along a U-shaped track or rail to guide the movement of a component. The U groove allows the bearing to ride smoothly along the track while maintaining alignment and reducing friction;we can produce different type of  custom made bearings ,such as U groove wheel, V groove bearings , H type ,O type …

U groove bearings are often used in various applications such as sliding doors, gates, windows, and other machinery where linear motion is required. They are available in different sizes and materials to suit different load capacities and environmental conditions. MKL BEARINGS can produce different type of V-Groove Bearing,U Groove wheels

These bearings are popular due to their simplicity, ease of installation, and reliable performance in guiding linear motion.

MKL BEARINGS is a professiona bearings & rollers factory ,for material we can produce with ceramic ,plastic ,Chrome steel ,stainless steel ;For bearings type we can produce with  Deep Groove Ball bearings,Shower Pulleys,non-standard bearing,Doors and windows Rollers,miniature bearings,bathroom roller,drawer roller,furniture roller...

If you have any bearings ,roller or wheels requirements just feel free to contact with us ,we can produce as your sample or drawing ;and sample can be provide for test before order .

 

In daily life, the toilet is one of the most frequently used fixtures in any household. Every internal component plays a crucial role in keeping your toilet functioning smoothly. One part that’s often overlooked is the toilet flapper (also known as the flush valve seal or rubber flapper), which is essential for proper flushing and preventing leaks from the tank. So, how often should you replace your toilet flapper? Let’s find out.

 

1. Why Does Replacing a Toilet Flapper Matter?

 

The flapper seals the flush valve at the bottom of the tank, preventing water from leaking out. When you press the flush button or handle, it quickly lifts to allow water to exit and flush the toilet.

However, over time, flappers can wear out due to constant exposure to water. They may shrink, deform, or become brittle, causing poor sealing. This leads to continuous tank leakage, reduced flushing power, and increased water bills. Regularly checking and replacing your toilet flapper ensures reliable toilet performance and prevents unnecessary water waste and household costs.

 

2. How Long Does a Toilet Flapper Last?

 

Typically, a toilet flapper lasts around 3 to 5 years. But the actual lifespan can vary depending on several factors:

 

• Material Differences: Common materials include PVC, rubber, and ABS.

 

1. PVC flappers are affordable and widely available but tend to shrink over time and lose sealing performance.
2. Rubber flappers are more durable and water-resistant than PVC and are less likely to shrink, though slightly more expensive.
3. ABS flappers are rigid and highly heat-resistant, but the sealing ring (usually rubber) can still degrade with age.

 

• Water Quality: Hard water with minerals or debris can speed up material breakdown and aging.

 

• Cleaning Habits: Using toilet cleaners with bleach or strong chemicals can erode the flapper material and reduce its lifespan.

 

While 3–5 years is a general guide, it's best to check regularly and replace based on actual usage and condition.

 

3. Signs It’s Time to Replace Your Toilet Flapper

 

Here are common signs indicating your flapper may need replacing:

 

• Continuous leaking: If your toilet tank keeps refilling or the fill valve is always active, water may be escaping due to a faulty flapper seal.

 

• Deformed or sticky flapper: If the flapper feels warped, sticky, or looks worn out, it likely can’t seal properly anymore.

 

4. How to Confirm It’s a Flapper Problem

 

Use these simple tests to determine if the issue lies with the flapper:

 

• Blue dye test: Add a few drops of blue food coloring into the tank and wait 10 minutes without flushing. If colored water appears in the bowl, the flapper is leaking.

 

• Visual inspection: Open the tank lid and check for signs of cracks, warping, or poor alignment with the flush valve seat.

 

5. How to Extend the Life of a Toilet Flapper

 

To prolong the lifespan of your toilet flapper and avoid frequent replacements:

 

• Avoid using in-tank bleach tablets or harsh toilet cleaners.

 

• Regularly clean the inside of the tank to remove mineral buildup or debris that can interfere with the flapper’s seal.

 

• Inspect the flapper periodically and replace it as soon as you see signs of aging or damage.

 

6. Conclusion: Routine Checks Save Water and Money

 

Though small, the toilet flapper plays a major role in conserving water and preventing leaks. We recommend inspecting your toilet tank at least once a year to catch issues early.

Replacing an old flapper is a quick, low-cost fix that can help avoid high water bills and reduce unnecessary water usage—benefiting both your home and the environment.

 

A toilet sealing ring, also known as a toilet tank to bowl gasket or tank-to-bowl seal, is a round gasket installed between the bottom of the toilet cistern and the ceramic toilet bowl. Note: This gasket is only used in two-piece toilets, where the tank and bowl are separate units.These gaskets are usually made from rubber, foam, or high-flexibility silicone, offering excellent sealing and cushioning properties. Its primary function is to form a waterproof barrier between the tank and the bowl, preventing leaks onto the bathroom floor when the toilet is flushed.

 

Three Key Functions of the Sealing Ring

 

1. Prevent Water Leakage

The sealing ring fits around the outlet of the flush valve and tightly seals the connection between the toilet tank and the bowl. It effectively prevents water from leaking through the gaps during flushing, keeping the bathroom floor dry and clean.

 

2. Cushion and Stabilize the Connection

The ring also serves as a cushion between the ceramic tank and bowl, reducing impact and stress. It helps prevent micro-cracks or damage that may occur during installation or use, and keeps the tank stable over time.

 

3. Improve Installation Fit

In reality, the tank and bowl may not always align perfectly due to surface irregularities or size tolerances. The sealing ring helps fill these gaps and ensures a tighter, more stable fit, reducing the chances of wobbling or leaks.

 

Common Problems When the Seal Ring Ages

 

Over time, the sealing ring may deteriorate due to constant exposure to water, pressure, and temperature changes. Common signs of a worn-out ring include:

 

1.Water leaking from the base when flushing

 

2.Persistent dampness or odor near the toilet

 

3.Tank wobbling or feeling unstable

 

If you notice any of these issues, it’s likely time to replace the gasket.

 

How to Replace a Toilet Tank Seal Ring

 

Here’s a step-by-step guide to replacing the sealing ring:

 

1. Turn off the water supply and flush the toilet to empty the tank;

 

2. Remove the tank bolts (usually located underneath the tank) using a wrench;

 

3. Carefully separate the tank from the bowl;

 

4. Remove the old gasket and clean any debris or residue from the tank outlet and bowl inlet;

 

5. Install the new sealing ring, align it properly, and reattach the tank;

 

6. Tighten the bolts, turn the water supply back on, and flush to test for leaks.

 

While this process is straightforward, we recommend choosing a high-quality, well-fitted toilet tank gasket to ensure leak-free performance and long-term durability.

 

Conclusion

 

Although small and hidden, the sealing ring between the toilet tank and bowl plays a vital role in preventing leaks, stabilizing the tank, and maintaining hygiene. If neglected, an aged or damaged gasket can lead to water waste, weak flushing, foul smells, and even bacterial growth.For best performance, we recommend replacing the toilet seal ring every 2–3 years as part of regular maintenance.

Arc Spark Optical emission Spectrometer-Introduction to CCD Photoelectric Detector

Traditional spectral detection system for the monochromator plus photomultiplier tube (PMT) Since the 1970s, it is desired to use photodiode arrays (SPDA) and other photoelectric sensors to establish a three-dimensional spectral map, and develop the corresponding processing technology. SPDA not only can obtain a certain range of detection information in the wavelength range, but also has the flexibility of integration capabilities, but it is not as sensitive and dynamic range as PMT, and the noise is larger, the linear range is narrow, and the dark current is also large, while the CCD makes up for these shortcomings.

There are several properties of CCD that are closely related to spectrometer instruments:

(1) High sensitivity and low noise. CCD devices have a very high quantum efficiency, at least 10%, up to 90% or more. Its charge transfer efficiency of almost 100%, it works at low temperatures almost no dark current, the noise is almost close to zero, the latest CCD devices, has achieved a very high signal-to-noise ratio at room temperature, very low dark current, fully meet the requirements of the instrument in the analysis of the constant and micro-analysis. The above advantages make the sensitivity of CCD devices exceed that of other detectors (e.g. PMT and SPDA), and the lower limit of detection reaches pg level or even fg level.

(2) Wide spectral range (200~1050nm). Quantum efficiency can be as high as 90 % in the visible region (400~500nm) and at least 10 % between the far ultraviolet region (200nm) and the near infrared (1000nm). In the 100 ~ 1100nm wide spectral region, CCD have high quantum efficiency, and most of the emission, absorption and scattering spectral instruments are working in this region, so the CCD has become an ideal detector for all kinds of spectral instruments.

(3) Wide dynamic linear response range of 10 magnitudes. The CCD has a wide response range and ideal response linearity of 10 magnitudes, and maintains a linear response throughout the dynamic response range, which is of particular significance for quantitative spectral analysis.

(4) Geometric stability, resistance to overexposure: CCD is stable in its geometric, thermal and electrical properties after a long period of operation, and is not afraid of overexposure, so it is stronger and more durable than PMT.

(5) Multiple channels can be sampled simultaneously to obtain a three-dimensional wavelength-intensity-time spectrogram, which can be used in conjunction with a photocathode device to observe X-ray images.

These characteristics of CCD make it an ideal detector for spectrometers. In the last two Pittsburgh conferences, a series of research reports were presented on CCD detectors for emission spectrometers, Raman spectrometers, fluorescence spectrophotometry, etc. It is expected that CCD will become a detector for all kinds of spectral instruments in a few years to replace the photomultiplier tubes.

Maintaining a clean, efficient, and quiet pool environment shouldn’t be a challenge. With the Shinhoo F-SP Pro Series, it isn’t. Designed specifically for residential pools, this new generation of permanent magnet pool pumps brings together cutting-edge efficiency, intelligent control, and quiet operation—meeting the real-world needs of today’s homeowners.

Exceptional Energy Efficiency

At the core of the F-SP Pro Series is advanced permanent magnet motor technology, delivering up to 75% energy savings compared to traditional pool pumps. Whether you're running daily filtration or heavy-duty cleaning cycles, the lower power consumption (as low as 340W) makes a noticeable impact on monthly utility bills.

Smart Dual Control Modes

Every pool has its own rhythm. That’s why the F-SP Pro offers dual control options: adjust by frequency or select from three RPM speed settings with a simple touch. It adapts instantly to your filtration, heating, or cleaning requirements—without technical headaches.

Superior Filtration Performance

From fallen leaves to fine debris, the F-SP Pro tackles suspended solids and impurities effortlessly—even in murky or heavily used pools. This ensures consistently clear water and a healthier swimming environment.

Whisper-Quiet Operation

Operating at ≤60 dB(A), the F-SP Pro Series blends seamlessly into the background. It’s quiet enough for peaceful evenings by the pool—no disruptive hum, just the sound of water and relaxation.

Built to Withstand the Elements

With an IP55-rated enclosure, this pump is engineered to resist rain, dust, and high temperatures, providing reliable performance in a variety of outdoor conditions. It’s a worry-free investment for long-term use.

 

Smart homes deserve smarter pool pumps. The Shinhoo F-SP Pro Series is not just an upgrade—it's a transformation of your pool experience.
Make the switch to efficiency, reliability, and peace of mind.

China Nanjing PEGE Cryogenic deflashing machine was spoken highly of by customer who has an old cryogenic deburring machine before

After half a year's stable and long time running of our Cryogenic Deflashing Machine in customer's factory. Customer speaks highly of our CRYOGENIC DEBURRING machine quality and performance with following points:
1. Higher efficiency and higher productivity, 30% higer than old rubber deflashing machine.
2. Less failures due to reasonable design and better production technology.
3. Great Media blasting and flash separation system to ensure large blasting power as well excellent flash and media separation ability.
4. Stable and wonderful electrical control system with Mistubishi, Schneider top brand components.
5. Improvements on details like door handle, gear box sealing, door sealing, media chamber holder and so on reduce a lot of maintenance and down-time.

Thanks very much for esteemed client's high appreciation, Nanjing PEGE surely works hard and provides best production and service.

The main features of China PEGE cryogenic deflashing and cryogenic deburring machine

 

1. The whole frame of the cryogenic deflashing equipment is made of high quality 304 stainless steel, the thickness of the steel pipe is 3mm, which is strong, durable and upscale.

2. The projectile wheel can be made of stainless steel, strong and durable.

3. The width of the projectile wheel is increased to 70mm for 120T and 150T, the projectile wheel range is wider, and the projectile efficiency is increased by 20%.

4. Using MCGS high-end touch screen, can store more than 20,000 pieces of product information, storage, reading, downloading, editing, host control and upgrading the scanner and other functions. Improve the tracking and traceability of product processing, adapt to the modern enterprise intelligent, digital management requirements.

5. The Blasting wheel motor of cryogenic deburring machine is selected from the reliable brand FUKUTA, and can also be equipped with Mitsubishi imported motors.

6. The deflector is made of stainless steel, which is free of replacement for life. Our deflashing equipment has no impeller rotor, which can reduce the maintenance cost.

7. The sealing plate of the ejector wheel is made of ultra-high polymer UPE material, the thickness is increased by 1 times, and the wear-resisting performance is increased by 100%.

8. T120,T150 models use 7.5KW high power motor, with 600mm width vibrating screen, processing efficiency and sorting efficiency significantly improved.

9. The gear box sealing system is excellent, in addition to the labyrinth design, our company also adds a layer of sealing plate to protect the oil seal.

10. Bevel gears do not use straight tooth structure, using helical tooth structure, high degree of overlap, large contact area, less wear and tear, increase the service life of bevel gears.

11. The door sealing strip is made of imported material and equipped with double heating wire, which has good heating effect and long service life, and there will be no door leakage.

12. Inverted trapezoidal compact design, nozzle built-in, reduce the overall chamber volume, reduce liquid nitrogen consumption.

13. The parts basket/barrel mouth can be closer to the ejection wheel, the injection effect is enhanced, and the processing efficiency is effectively improved.

14. The nitrogen deflashing machine's electrical cabinet and chamber are separated and independent, the electrical cabinet will not be affected by the cold air and dust from the chamber, which improves the cleanliness and the use of electrical appliances. 

15. The bottom and back of the door opening method adopts a simple and lightweight door suction device, and eliminates the latch locking door, so that there is no need to purchase a replacement life for the latch afterward. 

16. The front door of the nitrogen rubber deflashing equipment is fitted with three high-quality hinges at the top, middle and bottom of the door frame and the reinforcing bars are increased, so that it can avoid deformation of the door after a long time of use effectively. 

After long time use, it can effectively avoid the deformation of the front door. Back, bottom, electrical cabinet door plate thickness is high, heavy and not deformed.

Consumables for cryogenic rubber trimming machine – supply of liquid nitrogen

 

The frozen rubber deflashing machine, as an essential auxiliary manufacturing machinery in the production process of rubber enterprises, has been indispensable.

 

However, since its entry into the China mainland market around the year 2000, local rubber enterprises have little knowledge of the working principles and processes of the cryogenic deflashing machines.

Therefore, this article will provide a detailed introduction to the storage and supply methods of the cryogen, liquid nitrogen, for the cryogenic deflashing machines.

 

In the past, liquid nitrogen was typically stored in separate liquid nitrogen tanks. Therefore, when purchasing a cryogenic deflashing machine, it was necessary to buy a matching liquid nitrogen tank to ensure the proper operation of the machine.

The installation of the liquid nitrogen tank required approval from the relevant authorities, which was a cumbersome process, and the tanks themselves were expensive. This has led many factories that urgently need to use cryogenic deflashing machiness to improve work efficiency to hesitate, as it also involves a certain upfront cost investment.

 

Nanjing PEGE has introduced a liquid nitrogen manifold supply station to substitute for liquid nitrogen tanks.

This cryogenic deflashing system centralizes the gas supply of individual gas points, enabling multiple low-temperature Dewar flasks to be combined for centralized gas supply. It solves the cumbersome process of handling liquid nitrogen tanks, allowing customers to operate the cryogenic deflashing machines immediately after purchase.   Above are good options for the container of the Liquid Nitrogen.

 

The main body of the cryogenic deflashing system simultaneously connects three bottles of liquid nitrogen Dewar flasks, and it also includes a port that can be expanded to accommodate four bottles.

The cryogenic deflashing system pressure is adjustable and equipped with a safety valve. It’s easy to assemble and can be mounted on the wall using a triangular bracket or placed on the ground using the bracket.

Nanjing PEGE always provide strong technical support for customer to better use the cryogenic deflashing system.

 

Why PEGE cryogenic deflashing machines are becoming more and more important?

The use of cryogenic deflashing machines has revolutionized the way manufacturers produce high-quality products.

Cryogenic deflashing machines use liquid nitrogen to remove excess material from manufactured parts. The process is fast and precise, making it ideal for mass production. In this article, we will explore the advantages of cryogenic deflashing machines and why they replace traditional manual deflashing methods.

 

First of all, using a cryogenic deflashing machine is environmentally friendly. This makes Operating Room safer, healthier choice for workers and the environment. Secondly, cryogenic deflashers require less maintenance than traditional deflashing methods. This is because high quality spare part enable the machine to operate for a long time and do not require frequent replacement or maintenance.

Thus, these nitrogen deflashing machines save the manufacturer time and business cost.

Thirdly, the cryogenic deburring machines provide higher deflashing precision and accuracy. The process is controlled and consistent, ensuring that each pitch is finished to a high standard. This is useful for products that require smooth edges, such as medical instruments, automotive components, and electronic equipment.

Finally, the cryogenic shotblasting machines are versatile. They are available in a wider range of materials including rubber, injection molding (including elastomeric materials) and zinc magnesium aluminum die casting. This flexibility means they can be used in a variety of industries, making them a valuable investment for many companies.

 

All in all, the advantages of low temperature deburring machines make them an excellent choice for manufacturers. They are environmentally friendly, require less maintenance, provide greater precision, and are versatile.

 

The cryogenic deflashing system equipments are becoming more and more popular in the manufacturing industry as technology advances and machine designs improve.

They are likely to continue to be popular as manufacturers seek to produce high-quality products efficiently and cost-effectively.