Guangzhou, a commercial capital over thousand years
All merchants draw together like clouds
The 133nd Canton Fair will open on April 15

Shinhoo GPA-H pump will be unveiled

We sincerely invite purchasing representatives to attend the fair
and explore more possibilities of pumps together with us

Welcome to Hall 17.2, booth F33-36, G13-16

Hall 18.2, booth B32-33,C16-17

We are waiting for you

Shinhoo products pre-empt the prophet
GPA-H series heat pump system dedicated pump, seamless switching between cooling and heating.
(1) Integrate multiple control methods (PWM, Lin, 0-10V, etc.);
(2) With multiple functions (power feedback, speed feedback, flow feedback, head feedback, etc.);
(3) Various styles (MAX file + PWM file, multi-file + PWM file, PWM file);
(4) Full coverage of performance (flow 0-1Om³/h, head 4-17m).

As the name implies, booster pumps and circulating pumps have different performances . They have their own characteristics for obvious differences in terms of installation location, scope of application, operation and control.



From the perspective of installation location, the booster pump is generally installed on the inlet pipe; the circulating pump needs to be installed on the return pipe.



From the point of view of the scope of application, booster pumps are generally used in central heating systems, where the water pressure is small due to the small drop with solar energy, and the water pressure of the water heater is small, and the pressure needs to be boosted; the circulating pump is mainly for self-heating users, or the heating system of large and medium-sized households circulates, and the floor heating hot water is circulated.



From the perspective of boosting strength, booster pumps mainly solve the problem of lower water pressure, which is a type of pump with lower pressure; and the circulating pump has a higher pressure than the booster pump, which can drive the circulation of the entire heating system.



From the perspective of product operation, the booster pump is mostly automatically controlled; the circulating pump is mostly manually controlled.

 

Shinhoo, a company specializing in the manufacturing of canned pumps, launched a new upgrade of cooling and heating dual-purpose high efficiency circulation pumps (GPA-H series) --- 11H, 17H, which can be easily installed and operated.

11H, 17H are equipped with Self Adapting mode AUTO(default setting). Pump runs once the power is connected and adapts its perfomance according to the actual system needs. At the same time, the exterior of the electric pump has a digital pulse-width modulation (PWM) function to control the motor speed to meet the different flow requirement of the various system. 

The running noise of the electric pump is as low as 42dB(A), bringing a new comfortable experience to your family. The electric pump comes with over-voltage and over-current protection to prevent the danger of burning out during use. The minimum energy consumption can reach 5W, and the EEI≤0.20-Part3 meets the requirements of the latest ERP2015, allowing you to use it with a low-carbon lifestyle and feel at ease.

In order to provide better support for the development of energy-saving pumps, Shinhoo is actively promoting the new factory project, which is expected to be completed in 2024, with an annual production capacity of 5 million units.

Shinhoo's newly developed GPA III Pro series products are quiet and comfortable, energy-saving and power-saving. Compared with ordinary wall-hung boiler pumps, it can save about 60% of electricity. It is worth mentioning that the Shinhoo water pump has developed a flow feedback function based on the existing power feedback. The wall-hung boiler can better ensure accurate heat balance calculation through the flow information fed back by the water pump.

There's something magical about restoring old stone floors to their former glory. Each weathered tile or worn slab tells a story, and with careful renovation, these surfaces can regain their original elegance while maintaining their unique patina. The process requires both technical expertise and artistic sensibility, transforming aged stone into stunning focal points that blend history with modern functionality.

The journey begins with metal diamond grinding discs, a crucial first step that removes years of wear and tear. Expert-grade grinding instruments effectively remove deep scratches, smooth out uneven surfaces, and get the stone ready for further polishing. This step requires accuracy because an overly forceful technique may destroy the stone's inherent qualities, and inadequate grinding may result in flaws that detract from the finished product.

Once the surface is flawlessly level, the skill of polishing takes center stage. From matte sophistication to mirror-like sheen, artisans extract the stone's underlying brilliance with ever finer abrasives. Different procedures are needed for each material since the polishing process brings out the distinctive veining in marble, the crystalline shine in granite, or the colorful aggregate in terrazzo.

For particularly delicate restoration work or intricate patterns, specialized diamond abrasives make all the difference. These precision tools allow artisans to address specific problem areas without affecting surrounding surfaces. Whether dealing with historic thresholds, ornate borders, or damaged sections, the right abrasives preserve the floor's authenticity while ensuring structural integrity.

When undertaking such meticulous work, quality tools are paramount. TransGrind Diamond Tools provides professionals with premium grinding and polishing solutions designed for exceptional results. Our durable, high-performance tools, such as 5 steps hybrid concrete polishing pads and Husqvarna machines grinding plates, combine cutting-edge technology with practical design. Explore our complete product range at www.transgrindtools.com.

Plug in terminal blocks, as a common electrical connection device, are widely used in fields such as industrial control, power systems, and communication equipment. Its convenient installation and maintenance make it an important component in electrical connections. However, there are a wide variety of plug-in Terminal Block 4 Pin  on the market with uneven quality. How to choose the appropriate 4 pin terminal block connector has become an important issue for users. This article will provide a detailed analysis of the key points for selecting plug-in terminal blocks from multiple perspectives, helping users make informed choices.

 

 

1、 Clear requirements

1. Application scenarios

1.1 Industrial Control

High reliability: Industrial control environments are complex and require wiring terminals with high reliability and stability.

Vibration resistance: Industrial equipment often experiences vibration, so it is necessary to choose 4 way terminal block with good seismic performance.

 

1.2 Power System

High current: In power systems where the current is high, it is necessary to choose wiring terminals that can withstand high currents.

High temperature resistance: When power equipment operates at high temperatures, high temperature resistant materials should be selected.

1.3 Communication equipment

High density connection: Communication equipment requires high-density connection and compact terminal blocks should be selected.

Signal transmission: Communication equipment has high requirements for signal transmission and requires the selection of low resistance and 4 way connector block.

 

2. Electrical parameters

2.1 Rated voltage

Voltage level: Select the appropriate rated voltage according to the actual application scenario to ensure that the wiring terminals can withstand the working voltage.

2.2 Rated current

Current capacity: Select the appropriate rated current based on the load current to avoid heating and damage caused by overload.

2.3 Insulation resistance

Insulation performance: Choose wiring terminals with high insulation resistance to ensure electrical safety.

 

3. Mechanical parameters

3.1 Number of insertions and removals

Durability: Select the wiring terminals with the highest number of insertions and removals based on their frequency of use to ensure long-term reliability.

3.2 Insertion and extraction force

Convenient operation: Choose wiring terminals with moderate insertion and removal force to ensure ease of installation and disassembly.

3.3 Seismic performance

Environmental adaptability: In vibration environments, choose 6 pole terminal block with good seismic performance to prevent loosening.

 

2、 Material selection

1. Conductive materials

1.1 High purity copper

Conductivity: High purity copper has good conductivity, reducing resistance and heat generation.

Mechanical strength: High purity copper has high mechanical strength, ensuring the stability of the connection.

1.2 Surface treatment

Coating quality: Choose conductive materials plated with tin or silver to improve corrosion resistance and welding performance.

 

2. Insulation materials

2.1 High temperature resistant materials

Heat resistance: Choose engineering plastics that are resistant to high temperatures, such as nylon, polycarbonate, etc., to adapt to high temperature environments.

Flame retardancy: Choose flame-retardant materials to improve safety.

 

2.2 Mechanical strength

Impact resistance: Choose insulation materials with high mechanical strength to prevent damage caused by external forces.

 

3、Brand and Quality

1. Brand selection

1.1 Famous Brands

Credit guarantee: Choose well-known brand terminal block 4 way, with guaranteed quality and after-sales service.

Market reputation: Refer to market reputation and user evaluations to choose brands with good reputation.

 

2. Quality certification

2.1 Certification Standards

International certification: Choose wiring terminals that have passed international certifications (such as UL, CE, RoHS) to ensure quality and environmental performance.

Industry standards: Wiring terminals that comply with industry standards (such as IEC, GB) to ensure compatibility and reliability.

 

3. Supplier selection

3.1 Regular channels

Authorized dealer: Purchase through legitimate channels to avoid counterfeit and inferior products.

After sales service: Choose suppliers who provide comprehensive after-sales service to ensure follow-up support.

 

4、 Price and cost-effectiveness

 

1. Price comparison

1.1 Market research

Multiple comparisons: Conduct market research to compare prices of different brands and models.

 

2. Cost effectiveness evaluation

2.1 Performance and Price

Comprehensive evaluation: Taking into account performance, quality, and price, choose products with high cost-effectiveness.

 

Long term cost: Consider long-term usage costs and choose products that are durable and have low maintenance costs.

 

 

 

When working with terminal block connector PCB components,one common challenge is ensuring that the plug and pin align perfectly.A mismatch can lead to poor electrical connections,increased resistance,and even system failures.Whether you're dealing with terminal block electrical connector systems or PCB pin terminal setups,addressing this issue is crucial for maintaining optimal performance.

 

The first step in resolving a mismatch is to verify the specifications of your PCB terminal connectors.Often,the problem arises from using incompatible components.Check the datasheets for both the plug and pin to ensure they share the same dimensions,pitch,and current ratings.If the PCB terminal blocks you’re using don’t match the pins,consider switching to a compatible model or consulting the manufacturer for guidance.

 

Another effective solution is to inspect the physical condition of the screw terminal block connector and its pins.Over time,wear and tear can cause deformation or corrosion,leading to alignment issues.Clean the contacts thoroughly and check for any signs of damage.If the pins or connectors are bent or worn outreplacing them with high-quality terminal block connector PCB components can restore proper functionality.

 

For those designing custom PCB layouts,double-check,the pin spacing and alignment during the design phase.A small error,in the layout of PCB terminal connectors can lead to a significant mismatch.Use CAD tools to simulate the connection and make sure that the PCB pin terminal aligns precisely with the plug.This proactive approach can save both time and resources during assembly.

 

If the mismatch persists,consider using adapters or intermediary connectors.Many terminal block electrical connector systems offer adapters that can bridge the gap between mismatched components.These adapters are particularly useful when integrating older PCB terminal blocks with newer systems or when working with non-standard pin configurations.

 

Finally,always test the connection after resolving the mismatch.Use a multimeter to verify the electrical continuity and ensure there’s no excessive resistance.Whether you’re working with screw terminal block connector systems or other types of PCB terminal connectors,thorough testing guarantees a reliable and long-lasting connection.

 

By following these steps,you canin fact,effectively address mismatch issues among terminal block connector PCB components and pins.This ensures that your electrical systems operate smoothly and with high efficiency.

The solder pin design of screw terminals is usually divided into two types: straight pin and bent pin (Bent Pin or Right-Angle Pin). These two designs differ in installation method, space occupation and application scenarios. Here are their detailed differences:

 

1. Installation direction

 

Straight pin: The solder pin extends in a straight line with the terminal body and is installed perpendicular to the PCB (printed circuit board).

 

Bent pin: The solder pin is bent 90 degrees at the end and installed parallel to the PCB.

 

2. Space occupation

 

Straight pin: Since the solder pin is inserted vertically into the PCB, the terminal body will occupy the vertical space above the PCB.

 

Applicable scenarios: Suitable for applications with sufficient space above the PCB.

 

Bent pin: The solder pin is parallel to the PCB, and the terminal body is parallel to the PCB, occupying less vertical space.

 

Applicable scenarios: Suitable for applications with limited space above the PCB.

 

3. Installation method

 

Straight pin: The solder pin needs to be inserted vertically into the via hole of the PCB, usually used for through-hole technology (THT).

 

Bent pin: The solder pin can be directly soldered on the surface of the PCB, suitable for surface mount technology (SMT) or through-hole technology.

 

4. Mechanical strength

 

Straight pin: Since the solder pin is inserted vertically into the PCB, it has high mechanical strength and can withstand large tension and vibration.

 

Applicable scenarios: Suitable for applications that require high mechanical strength, such as industrial equipment or automotive electronics.

 

Bent pin: The solder pin is connected parallel to the PCB, and the mechanical strength is relatively low, but it can still meet most application requirements under reasonable design.

 

Applicable scenarios: Suitable for occasions where mechanical strength is not required, such as consumer electronics.

 

5. Soldering process

 

Straight pin: Usually wave soldering or manual soldering is used, which is suitable for through-hole insertion technology.

 

Bent pin: Reflow soldering (for SMT) or wave soldering (for THT) can be used, and the soldering process selection is more flexible.

 

6. Heat dissipation performance

 

Straight pin: The solder pin is inserted vertically into the PCB, the heat dissipation path is short, and the heat dissipation performance is better.

 

Bent pin: The solder pin is parallel to the PCB, the heat dissipation path is long, and the heat dissipation performance is slightly worse, but the heat dissipation can be optimized through PCB design.

 

7. Electrical performance

 

Straight pin: Since the solder pin is directly inserted into the terminal block 6 pole, the electrical connection path is shorter and the resistance is lower, which is suitable for high current applications.

 

Bent pin: The electrical connection path is slightly longer, which may increase a small amount of resistance, but the impact can be ignored in most applications.

 

8. Application scenarios

 

Straight pin:

 

Industrial control equipment

 

Automotive electronics

 

Power supply equipment

 

High vibration environment

 

Bent pin:

 

Consumer electronics (such as TVs, audio)

 

Communication equipment

 

PCB design with limited space

 

9. Cost

 

Straight pins: Usually have lower costs because of their simple structure and mature production process.

 

Bent pins: May have slightly higher costs due to the need for additional bending processing.

 

10. Design flexibility

 

Straight pins: The design is relatively fixed and suitable for standardized applications.

 

Bent pins: The design is more flexible and the solder foot direction can be adjusted according to the PCB layout, which is suitable for high-density PCB design.

 

Summary

 

Characteristics Straight Pin Bent Pin

 

Installation Direction Vertical PCB Parallel PCB

 

Space Occupancy Occupies vertical space Saves vertical space

 

Mechanical Strength Higher Lower

 

Soldering Process Wave Soldering, Manual Soldering Reflow Soldering, Wave Soldering

 

Heat Dissipation Better Slightly Worse

 

Electrical Performance Smaller Resistance Slightly Larger Resistance

 

Application Scenarios Industrial, Automotive, High Vibration Environment Consumer Electronics, Communication Equipment, Space-Constrained Design

 

Cost Lower Higher

 

Design Flexibility Lower Higher

 

Choosing a straight pin or a bent pin depends on the specific application requirements, including space constraints, mechanical strength, heat dissipation requirements, and cost.

 

The power industry is changing quite rapidly.And this is due to advancements in technology and the requirement for more efficient electrical systems.One of the significant aspects that are influencing this change are screw-type terminal blocks.These terminal blocks,actually,are extremely crucial as they ensure the connections are both secure and reliable.Their versatility and robustness make them essential in numerous applications,such as from industrial automation to renewable energy systems.Screw-type terminal blocks are rather important since they provide stable connections which are safe and dependable.As the power industry continues to evolve,these components still remain very important as they can accommodate different needs.They are widely used in various fields,including industrial automation and renewable energy systems,where reliability is of utmost importance.

 

One of the most significant trends,is that there is a growing demand for terminal block 3 pole configurations.These blocks,are quite ideal for handling three-phase power systems,which are widely used in industrial and commercial settings.As the power industry moves towards higher efficiency and sustainability,the adoption of 3 pole terminal block solutions,is expected to increase,especially in solar and wind energy installations.

 

Another trend isthe integration of screw type terminal blocks with advanced PCB designs.The use of PCB barrier terminal block components allows forcompact and organized wiring,reducing the risk of short circuits and improving overall system reliability.This is especially important in modern power systems,where space optimization and safety are top priorities.

 

Besides multi-pole configurations,the need for more straightforward connections like the 2 pin screw terminal is increasing.These blocks,commonly utilized in low-voltage applications,are prized for their simple installation and maintenance.The 2 pin screw terminal block connector is especially favored in residential and small-scale commercial projects;it's a fact that where simplicity and cost-efficiency hold great importance.

 

The power industry is also seeing a shift toward more robust and environmentally friendly materials in screw type terminal blocks.Manufacturers are increasingly using high-quality,corrosion-resistant alloys and insulating materials that can withstand harsh conditions.This ensures that terminal block 3 pole and other configurations remain reliable even in extreme environments,such as offshore wind farms or high-temperature industrial facilities.

 

Looking ahead,the future of screw type terminal blocks in the power industry will be shaped by innovation and adaptability.From PCB barrier terminal block designs to versatile 2 pin screw terminal solutions,these components will continue to evolve to meet the demands of modern electrical systems.As the industry embraces smarter grids and renewable energy,screw type terminal blocks will remain a cornerstone of efficient and reliable power distribution.

 

By staying ahead of these trends,manufacturers and engineers can ensure that their systems are equipped to handle the challenges and opportunities of the future.Whether it’s a 3 pole terminal block for industrial applications or a 2 pin screw terminal block connector for residential usethe right terminal block solution can make all the difference.

Introduction to Plastic CNC Machining

CNC machining is one of the most effective methods for producing high-precision plastic components. It offers excellent accuracy, flexibility, and consistency, making it ideal for industries such as medical device manufacturing, aerospace prototyping, and consumer electronics production. Unlike injection molding, CNC machining does not require expensive tooling, making it perfect for low-volume plastic part manufacturing and custom designs.  

 

Why Choose CNC Machining for Plastic Parts?

- Superior dimensional accuracy – Ideal for tight-tolerance plastic parts.  

- Supports a wide range of plastics – Including  ABS, PC, PMMA, PEEK, POM, and Nylon.  

- No tooling cost – Perfect for custom plastic prototype machining and short-run production.  

- Excellent surface quality – Options for polishing, painting, and custom plastic finishing services.  

• Fast production turnaround – Efficient and cost-effective for low-volume plastic manufacturing.  

 

 

Our Expertise in CNC Machining for Plastics

At LEADMAKE, we specialize in 5-axis CNC plastic machining, allowing us to manufacture complex and highly detailed components with extreme precision. Our advanced equipment and experienced team ensure that every part meets the highest quality standards.  

 

Why Work With Us?

✅ 5-axis CNC machining for plastic parts – Achieve intricate geometries with high precision.  

✅ ISO-certified quality control – Rigorous inspection to guarantee accuracy and consistency.  

✅ Rapid prototyping & small-batch production – Quick delivery without the need for expensive molds.  

✅ Custom finishes for plastic CNC parts – Including polishing, painting, laser engraving, and UV coating.  

✅ Global shipping & fast turnaround – Reliable production with on-time delivery.  

 

Request a Free Quote Today!

Looking for a trusted CNC machining supplier for plastic parts? At LEADMAKE, we provide custom CNC machining services for plastics, ensuring precision, efficiency, and cost-effectiveness. Contact us today for a free CNC machining quote, and let's turn your designs into reality!  

 

📩 Get in touch now

 

When working with concrete or stone surfaces, a diamond polishing pad is crucial for achieving a smooth, high-quality finish. However, many users face the frustrating problem of their pads wearing out more quickly than anticipated. Understanding the causes of this issue can help you take the necessary steps to prolong the life of your pads and enhance efficiency.

Choosing the right grit size is vital for effective polishing. Using a pad with a grit that is too fine for heavy material removal can lead to rapid wear due to excessive friction. Conversely, starting with a grit that is too coarse on a sensitive surface can also cause premature wear. Selecting the appropriate sequence of grit levels can optimize the lifespan of your pads.

Exerting excessive pressure while using wet polishing pads can create unnecessary heat and friction, resulting in quicker degradation. Instead of forcing the pad, allow it to perform its function with consistent, moderate pressure. Proper use of water during wet polishing can also help minimize heat and enhance the pad's durability.

Using the wrong RPM (revolutions per minute) can greatly affect the longevity of your polishing pad. High speeds can generate excessive heat and wear, while speeds that are too low may lead to inefficient cutting and glazing of the pad. Always adhere to the recommended speed settings for your specific pad type and material.

If the surface has rough edges, debris, or contaminants, the polishing pad may wear unevenly or deteriorate more quickly. Properly preparing the surface by grinding or cleaning it beforehand ensures a smoother polishing process and reduces unnecessary strain on the pad. Besides, not all polishing pads are of the same quality. Low-quality materials and poor bonding can cause resin diamond polishing pads to wear out much faster than expected.

TransGrind Diamond Tools is a professional manufacturer and supplier of premium diamond grinding tools. Our products are designed for high performance, durability, and precision, ensuring optimal results in grinding and polishing tasks. To explore our extensive range of products, please visit us at www.transgrindtools.com.