Known for its ability to connect and disconnect quickly, the SMC KQ2P-04 is a quick coupler product launched by SMC Corp from its parts catalog, providing great convenience for modern industrial automation systems. This quick coupling, with its unique design and excellent performance, is widely used in pneumatic systems such as automated machinery and robotic arms.
It features a white coupling body and a light gray release button, enhancing its visual recognition. This article will detail the product parameters, features, application scenarios, usage instructions, and precautions of the SMC KQ2P-04 quick coupling, along with answers to some frequently asked questions.

Product Parameters:
Product Type: Quick Coupling
Series: KQ2
Color: White coupling body, light gray release button
Materials:
Body: Stainless Steel 304
Seal: NBR (with fluorine coating)
Release Button: NBR
Applicable Tube Diameter: Outer diameter 4mm hose
Connection Thread: M5 x 0.8
Working Pressure: Maximum operating pressure 1.0MPa, suitable for vacuum systems (vacuum degree below 100kPa)
Operating Temperature: -5 to 60°C (excluding water, water operating temperature is 0 to 40°C, not freezing)
Product Features:
Rapid Connection: Significantly reduces piping time and saves space.
Sealing Performance: Standard type with sealant ensures the sealing of connections.
Corrosion Resistance: Optional surface nickel-plated, no copper ions produced.
Material Compatibility: Suitable for nylon and PU hose materials.
Application Scenarios:
Automated Machinery: Quick replacement of pneumatic lines on automated production lines.
Robotic Systems: Used for quick connection and disconnection of robotic arm pneumatics.
Pneumatic Tools: Provides convenience in situations where tools need to be changed frequently.
Usage Instructions:
Installation: Ensure the cleanliness of the coupling and hose, then insert in the correct direction.
Operation: Press the release button to pull the coupling out of the hose.
Maintenance: Regularly check the wear of the seal and replace it when necessary.
Precautions:
Environment: Avoid using in extreme temperatures or corrosive environments.
Operation: Ensure the system is depressurized before disconnecting to avoid high-pressure gas injuries.
Maintenance: Regularly clean and inspect the coupling to ensure it is in good working condition.
Frequently Asked Questions (FAQ):
1. How to ensure the sealing performance of the SMC Corp product quick coupling?
Ensure the coupling and hose are clean, free of dust and oil, which helps improve the sealing effect of the seal.
Regularly check the wear of the seal and replace it immediately if cracks or deformations are found.
When connecting, ensure the hose is fully inserted into the coupling until resistance is felt.
2. What types of hoses are suitable for the SMC Corp quick coupling?
The coupling is suitable for nylon and PU hoses with an outer diameter of 4mm.
The design of the coupling allows it to be compatible with various hoses, but ensure the outer diameter of the hose meets the requirements.
3. What is the temperature range for using the SMC Corp quick coupling?
The operating temperature range of the quick coupling is -5 to 60°C, suitable for most industrial environments.
For water applications, the operating temperature range is 0 to 40°C, avoiding freezing.
4. What is the maximum working pressure of the SMC coupler quick coupling?
The maximum operating pressure is 1.0MPa, suitable for most pneumatic systems.
The coupling is also suitable for vacuum systems with a vacuum degree below 100kPa.
5. How to clean and maintain the SMC coupler quick coupling?
Regularly clean the exterior of the coupling with a soft cloth or brush, avoiding the use of hard objects to scratch and damage the surface.
For internal cleaning, compressed air can be used to blow out dust and impurities inside.
6. What are the material characteristics of the SMC coupler quick coupling?
The body is made of stainless steel 304, which has good corrosion resistance and strength.
The seal is made of NBR material, which has good oil resistance and wear resistance.
7. How to correctly install the product quick coupling?
Ensure the end of the hose is flat and undamaged, then insert the hose into the coupling until resistance is felt.
According to the SMC parts catalog, avoid using excessive force during the connection process to prevent damage to the hose or coupling.
8. What is the thread specification of the product quick coupling?
The connection thread of the coupling is M5 x 0.8, suitable for standard M5 nuts and bolts.
9. What safety precautions should be taken when operating the SMC KQ2P-04 quick coupling?
Ensure the system is fully depressurized before disconnecting to avoid high-pressure gas injuries.
Avoid looking directly at the release button during operation to prevent gas from spraying into the eyes.
10. Is the product quick coupling suitable for corrosive environments?
Although the body material of the coupling is stainless steel 304, which has certain corrosion resistance, caution is still needed when used in highly corrosive environments.
According to the SMC parts catalog, for highly corrosive environments, consider choosing couplings with special surface treatments to improve corrosion resistance.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a one-stop integrated service provider of intelligent manufacturing, belongs to the Gong Doctor Group, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1). Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3). At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.