Product Description

Features

1. Sleeve locking mechanism is engaged by rotating sleeve after connection. It prevents accidental disconnection when, the coupling is dragged along the ground.
2. Sleeve mechanism is designed to help prevent dirt from entering the intermal mechanism and thus causing faulty operation when connecting or disconnecting. The sleeve covers the retaining ring and also in corporates a dust seal in the spring.
3. Steel construction, Zinc plated with yellow chromate finish. Hardened nipples and sleeves and CHINAMFG barstock construction for maximum resistance to damage from hydraulic and mechanical shock.
4. This Anti-Blowout Nitrile/PTFE bonded seal is designed to prevent blow-out or damage during severe service conditions.
5. Durable ball-locking mechanism assures reliable connections, every time. A large number of locking balls distributes the work load evenly while providing alignment and swiveling action to reduce hose torque and prolong hose life. CAUTION: These products are not to be used as swivels. Rotation under pressure will result in excessive and premature wear.
6. This series couplings employ flush valving when connecting or that only small amounts of fluid can be lost during disconnection or air inclusion during reconnection.
7. This series conforms to standard of ISO16571.

Applications
This Series couplings are widely used in the public utility market where hydraulic oil spillage can constitute a serious safety hazard, particularly in overhead bucket hoists that are used for maintenance of high-voltage power transmission lines, These couplings are also used for quick change of hydraulic tools in construction, railway maintenance and mining industries, the ease of cleaning makes them ideal for use in these types of hostile environments.

Body size (in)	1/4 3/8 1/2 3/4 1
Rated Pressure (Bar)	300 250 200 200 200
Material:	Carbon steel
Standard seal material:	NBR (other material is available on request)
Temperature Range (Std seals):	-20°C to +80°C

 

Part No.	Thread Size BSPP	Body size	E Overall Length (mm.)	F Hex Size (mm.)	G Largest Diameter (mm.)	Part No.	Thread Size NPT	Body size	E Overall Length (in.)	F Hex Size (in.)	G Largest Diameter (in.)
QKPT 02-02SF	G1/4	1/4	48.0	24.0.	28.0	QKPT 02-N02SF	NPT1/4	1/4	1.88	0.94	1.10
QKPT 03-03SF	G3/8	3/8	65.0	27.0	32.0	QKPT 03-N03SF	NPT3/8	3/8	2.55	1.06	1.25
QKPT 03-04SF	G1/2	3/8	70.0	27.0	32.0	QKPT 03-N04SF	NPT1/2	3/8	2.75	1.06	1.25
QKPT 04-04SF	G1/2	1/2	79.0	36.0	40.0	QKPT 04-N04SF	NPT1/2	1/2	3.11	1.41	1.57
QKPT 04-06SF	G3/4	1/2	79.0	36.0	40.0	QKPT 04-N06SF	NPT3/4	1/2	3.11	1.41	1.57
QKPT 06-06SF	G3/4	3/4	79.0	36.0	41.0	QKPT 06-N06SF	NPT3/4	3/4	3.11	1.41	1.63
QKPT 08-08SF	G1	1	93.0	45.0	48.0	QKPT 08-N08SF	NPT1	1	3.66	1.77	1.88

About our company:  
HangZhou HI-TECH SMART MACHINERY CO LTD was established in 2013, is a high tech company specialized in pneumatic components and microduct accessories manufacturing. After years’ hard working, it has owned 2 factories now, and the products include pneumatic vibrators, air cylinders, solenoid valves, air treatment units, pneumatic fittings&mufflers, microduct connectors and other accessories. We have sold our goods to more than 60 countries, and that number is still increasing.
Our Services & Strength
1. We have more than 10 years experience on pneumatic products;
2. Excellent quality control has always been the goal of our practice;
3. You can purchase most of the pneumatic products here;
4. Sample orders and orders with a small number of products are acceptable;
5. OEM, ODM is ok for us. Not only the label and packaging, but also the personalized customization of the product itself;
6. Any requirements, just feel free to let us know. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

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Can hydraulic couplings handle both angular and axial misalignments simultaneously?

Yes, hydraulic couplings are designed to handle both angular and axial misalignments simultaneously. These couplings have inherent flexibility in their design, allowing them to accommodate various types of misalignments between the driving and driven shafts.

Angular misalignment occurs when the axes of the two shafts are not collinear, resulting in an angle between them. Axial misalignment, on the other hand, refers to the offset between the two shafts along their axis. Hydraulic couplings can compensate for these misalignments without sacrificing their ability to transmit torque efficiently.

The design of hydraulic couplings typically includes features such as flexible elements, torsional flexibility, or a fluid medium that allows the coupling to absorb and compensate for misalignments. When misalignment occurs, the flexible elements or fluid within the coupling act as a buffer, transmitting torque smoothly and reducing stress on the connected components.

By accommodating both angular and axial misalignments, hydraulic couplings offer several advantages in various applications:

• Reduced Wear: Hydraulic couplings’ ability to handle misalignments helps reduce wear and tear on the shafts, bearings, and other components, prolonging the life of the equipment.
• Smooth Operation: The ability to compensate for misalignments results in smoother operation and reduced vibrations, contributing to overall system performance and precision.
• Overload Protection: Hydraulic couplings can provide overload protection by allowing slippage when torque exceeds the coupling’s capacity, protecting the system from damage.
• Shock Absorption: In systems subject to shock loads or sudden changes in torque, hydraulic couplings can absorb and dampen these shocks, preventing damage to the equipment.
• Maintenance Reduction: By minimizing stress on the system components, hydraulic couplings can help reduce maintenance requirements and downtime.

It is important to note that the extent of misalignment accommodation may vary depending on the specific design and type of hydraulic coupling. Manufacturers provide guidelines and specifications for each coupling, including the maximum allowable misalignments.

Overall, hydraulic couplings’ ability to handle both angular and axial misalignments simultaneously makes them a versatile choice for various industrial applications where precision, efficiency, and reliable power transmission are essential.

Can hydraulic couplings be retrofitted into existing hydraulic systems for improved performance?

Yes, hydraulic couplings can be retrofitted into existing hydraulic systems to enhance performance, improve reliability, and address specific system requirements. Retrofitting hydraulic couplings can be a cost-effective way to upgrade older systems without the need for extensive modifications or complete replacements.

Retrofitting hydraulic couplings may be beneficial for several reasons:

• Improved Efficiency: Upgrading to modern hydraulic couplings with better design features can reduce energy losses and improve overall system efficiency. For example, switching from older, less efficient couplings to newer, more streamlined designs can optimize fluid flow and reduce pressure drop.
• Leak Reduction: Older hydraulic systems may experience fluid leaks due to worn-out or damaged couplings. Retrofitting with new, high-quality couplings equipped with advanced sealing technologies can significantly reduce the risk of leaks, leading to better system reliability and environmental safety.
• Higher Pressure and Flow Capabilities: Newer hydraulic couplings may offer higher pressure and flow ratings, allowing the system to handle increased demands or heavier loads. This can be crucial for applications that require more power and performance.
• Material Compatibility: In some cases, existing hydraulic systems may have components made from materials that are not compatible with certain hydraulic fluids. Retrofitting with appropriate couplings can ensure compatibility and prevent corrosion or other fluid-related issues.
• Space Constraints: Modern hydraulic couplings often come in more compact designs, which can be advantageous for systems with limited space. Retrofitting with smaller couplings may allow for better system integration and improved layout.
• Environmental Compliance: Retrofitting hydraulic couplings can help align the system with current environmental regulations and industry standards, reducing the risk of potential fines or non-compliance issues.

Before retrofitting hydraulic couplings, careful evaluation of the existing system is necessary to ensure compatibility and identify specific areas for improvement. Factors such as thread type, size, pressure rating, flow capacity, and material compatibility must be considered to select the appropriate couplings for the retrofit.

It’s essential to consult with hydraulic coupling manufacturers or experienced fluid power professionals when planning a retrofit. They can provide guidance on suitable coupling options and recommend the necessary modifications or adjustments to optimize system performance.

In conclusion, retrofitting hydraulic couplings into existing hydraulic systems can be a viable solution for enhancing performance, reducing leaks, and achieving better overall efficiency and reliability. It allows businesses to leverage the latest advancements in hydraulic coupling technology to extend the lifespan and improve the functionality of their existing hydraulic systems.

Are there specific pressure and temperature limits for different hydraulic coupling designs?

Yes, different hydraulic coupling designs have specific pressure and temperature limits, and these limits can vary based on the coupling type and construction materials. Here are some general considerations regarding pressure and temperature limits for common hydraulic coupling designs:

• Jaw Couplings: Jaw couplings typically have a pressure rating ranging from 1000 psi to 5000 psi (6.9 MPa to 34.5 MPa) and can handle temperatures from -20°C to 120°C (-4°F to 248°F). These couplings are suitable for various industrial applications with moderate pressure and temperature requirements.
• Disc Couplings: Disc couplings offer higher pressure and temperature capabilities compared to jaw couplings. Their pressure rating can range from 2000 psi to 6000 psi (13.8 MPa to 41.4 MPa), and they can handle temperatures between -50°C to 150°C (-58°F to 302°F). These couplings are commonly used in high-performance and precision equipment.
• Fluid Couplings: Fluid couplings are suitable for applications requiring smooth start-ups and shock absorption. Their pressure limits can range from 150 psi to 3000 psi (1.03 MPa to 20.7 MPa), and they can handle temperatures from -40°C to 150°C (-40°F to 302°F). These couplings are often used in heavy machinery, such as conveyors and crushers.
• Gear Couplings: Gear couplings have a higher pressure rating, typically ranging from 2500 psi to 8000 psi (17.2 MPa to 55.2 MPa), and can handle temperatures from -20°C to 150°C (-4°F to 302°F). These couplings are commonly used in heavy-duty industrial applications with high torque requirements.
• Oldham Couplings: Oldham couplings have pressure limits ranging from 500 psi to 3000 psi (3.4 MPa to 20.7 MPa) and can handle temperatures between -30°C to 100°C (-22°F to 212°F). They are suitable for applications where shafts are not in perfect alignment.
• Diaphragm Couplings: Diaphragm couplings offer high pressure and temperature capabilities. Their pressure rating can range from 3000 psi to 10000 psi (20.7 MPa to 68.9 MPa), and they can handle temperatures from -50°C to 200°C (-58°F to 392°F). These couplings are commonly used in high-speed and high-temperature applications like pumps and compressors.
• Beam Couplings: Beam couplings typically have a pressure rating ranging from 1000 psi to 4000 psi (6.9 MPa to 27.6 MPa) and can handle temperatures between -40°C to 150°C (-40°F to 302°F). They are commonly used in precision equipment and motion control applications.

It’s essential to consult the manufacturer’s specifications and guidelines for each specific hydraulic coupling design to ensure it is suitable for the intended application’s pressure and temperature requirements. Using a coupling within its specified limits ensures safe and reliable operation and maximizes the performance and lifespan of the hydraulic system.

editor by CX 2024-05-06