A 无轮毂联轴器 is a flexible connector used by plumbers to connect pipes of different sizes. It consists of a stainless steel clamp and a corrugated guard. The guard pushes an internal gasket to form a tight seal, effectively preventing leaks and pipe sagging. Choosing the right hubless coupling is crucial, as even a small mistake can cause pipe problems.Shielded no hub coupling are compatible with a variety of pipe materials, making them ideal for connecting pipes.
主要收获
- Groove-equipped hubless couplings ensure a tight pipe connection. They prevent leaks and are suitable for a variety of pipe types. This makes them ideal for plumbing projects.
- Installation is quick and easy. It saves time and costs compared to traditional methods such as welding.
- The guard design helps keep the pipe connection secure. It also reduces the risk of leaks.
- Choosing the right coupling is very important. Ensure it meets safety specifications and matches your pipe size for best results.
- Regularly check the clamps after installation. This helps maintain a strong seal and prevent leaks.
Shielded No-Hub Coupling Design
Main Components
Shielded couplings contain special components that help keep the pipe connection secure. Each component performs its specific function and is constructed from robust and durable materials. HWKG shielded hubless fittings utilize a special shield, beaded gaskets, locking clamps, and floating eyelets. These components work together to prevent leaks and ensure a tight pipe connection.
| 组件 | 材料 |
|---|---|
| Variable Band Configuration | 2-6 worm gear clamp bands |
| Corrugated Shield Design | 301 series stainless steel |
| Neoprene Gasket System | Polychloroprene elastomeric gasket |
| Axially Slotted Clamps | 不锈钢 |
| Integrated O-Ring Sealing | 不适用 |
The beaded gasket is made of robust rubber. Multiple bead-like structures prevent the gasket from shifting in the pipe. This helps form a good seal and prevent leaks. Even if the pipe vibrates or moves, the clamps and floating rings ensure a secure connection.
HWKG shielded fittings have important safety certifications such as ISO 9001 and cUPC. These certifications demonstrate the product’s safety, reliability, and superior performance. Shielded hubless fittings can connect cast iron, PVC, copper, and ABS pipes, making them suitable for a wide range of piping projects.
Bi-Directional Shield Feature
The grooves on the dual-direction shielding help the clamp tighten in both directions, ensuring a tight fit between the gasket and the pipe, preventing pipe movement and maintaining a secure connection. Additionally, the shielding helps the pipe maintain its shape under pressure.
HWKG’s special shielding design offers numerous advantages:
| 特点 | 说明 |
|---|---|
| Effective leakage prevention | The metal shield and rubber sleeve keep joints tight and stop leaks. |
| Excellent pressure and load resistance | The steel and rubber parts work well in tough conditions. |
| Noise and vibration reduction | The rubber layer soaks up shaking and makes things quieter. |
| Compatibility with multiple materials | It connects different pipe types, so it is very flexible for plumbing. |
Shielded couplings are good for tough jobs and high pressure. The shielded no-hub design keeps pipes joined tightly and works well.
Installation Process
Installation of shielded hubless fittings requires careful handling to prevent leaks. HWKG shielded fittings offer quick and time-saving installation. Follow these steps for optimal results:
- Deburr and clean thoroughly. Remove sharp edges and dust. Clean both ends of the pipe and the sleeve with a cloth. Never get oil or primer on the rubber.
- Dry installation. Slide the fitting into the cast iron pipe first, then slip it onto the PVC pipe. Ensure the fitting is centered below the shielding.
- Tighten in sequence. Start with the center clamp and tighten outwards. Check each clamp.
- Use a torque wrench. Tighten each clamp to the value on the label, typically 60 or 80 inch-pounds.
- Retighten. Wait a few minutes, then check each clamp again to ensure it is tightened.
- Add permanent support. For above-ground pipes, use hangers; for underground pipes, use compacted soil.
- Backfill in layers. In the trench, backfill around the fitting in layers of sand or fine soil, 6-8 inches thick.
- Restore the floor. Lay gravel, a moisture barrier, and concrete according to local regulations.
- Water test. Fill the pipes with water and check for leaks. Mark any leaks and retighten clamps if necessary.
- Endoscopic inspection. Use an endoscope to check the pipe alignment and smoothness of the inner walls.
- Flow test. Supply water to multiple taps simultaneously and observe for any movement of the joints.
Tip: Always check the tightness of each clamp band after a few minutes. This helps keep the seal strong and stops leaks.
Shielded no-hub couplings make pipe connections strong for many plumbing uses. The design, materials, and steps help keep pipes from leaking and last a long time.
Shielded vs. Standard No-Hub Couplings
Structural Differences
Shielded fittings and standard hubless fittings differ in construction. These design differences affect how they function in piping systems. The table below lists the key features of each type of fitting:
| 特点 | Shielded Couplings | Unshielded Couplings |
|---|---|---|
| Shear Ring | Yes, includes a heavy-duty shear ring for strength | No, does not include shear rings |
| High-Torque Clamps | Yes, designed for high-torque applications | No, lacks high-torque clamps |
| Encased Structure | Yes, encased in a metal structure for protection | No, not encased |
| Recommended Use | Suitable for underground applications | Not recommended for underground use |
| Leak-Proof Seal | Yes, creates a leak-proof seal | Yes, also creates a leak-proof seal |
Shielded fittings feature a robust metal shield and a shear ring. These components help maintain the tightness and strength of the fitting. They function properly even if the pipe vibrates or moves. Standard fittings do not include these additional components.
Performance Comparison
Shielded fittings are better suited for high-intensity operations. They can withstand higher pressures and have a longer service life in harsh environments. HWKG manufactures three types of shielded fittings, each with a different pressure rating:
| 耦合类型 | Pressure Rating (PSI) | Pressure Rating (KPA) |
|---|---|---|
| 标准 | 0.9 | 6.2 |
| Medium Duty | 2.2 | 15.1 |
| 重型 | 4.3 | 29.6 |
Shielded couplings keep their seal even with heavy loads or high pressure. This makes them a good choice for pipes underground. They are also good where leaks could cause big problems.
When to Use Shielded Couplings
Shielded fittings are chosen by plumbers when they require greater strength and safety. These fittings are suitable for underground, high-rise buildings, and factories. HWKG manufactures shielded fittings for light, medium, and heavy-duty operations. This helps plumbers choose the fitting best suited for their work.
Note: Shielded fittings help prevent leaks and protect pipes. They also make pipe repairs easier and faster.
Shielded couplings give strong support and work well. They help keep plumbing safe and dry.
Applications of Shielded no hub couplings
Residential and Industrial Uses
Shielded socketless pipe fittings are essential in residential and large buildings. Plumbers use them for drainage, sewage, and ventilation systems. These fittings are suitable for both above-ground and underground piping. In residential buildings, they are used to connect cast iron, PVC, or ABS pipes to sinks, showers, and toilets. In factories and shops, they withstand heavy loads and high pressures. A robust steel shield and rubber gasket ensure a secure pipe connection.
The table below shows how shielded socketless pipe fittings meet the specifications for different applications:
| 特点 | 说明 |
|---|---|
| 标准 | Meets CISPI 310, ASTM C1277, and NSF requirements |
| 应用 | Used in DWV systems for homes, stores, and tall buildings |
| 材料 | Stainless steel shield and tough rubber gasket |
| 合规性 | Made to follow plumbing codes |
Leak Prevention and Reliability
Shielded socketless pipe fittings effectively prevent leaks and are durable. Their design absorbs vibrations and keeps pipes aligned, reducing the risk of leaks. Plumbers choose these fittings for high-intensity underground work. They can withstand soil pressure and temperature variations. The robust components support the pipes and maintain a tight connection, even with frequent use.
- Shielded fittings are ideal for locations with a continuous water supply.
- They keep pipes aligned and prevent underground leaks.
- Neoprene gaskets provide a durable, strong seal.
Choosing the Right No Hub Coupling
Choosing the right socketless fitting ensures the safety and strength of your pipes. Plumbers will check that it conforms to ASTM C1277 or CISPI 310 standards. They will also look for suitable stainless steel clamps and washers. The type and size of the fitting must perfectly match the pipes. HWKG fittings are quick to install and can save up to 40% on labor costs compared to welding. This helps plumbers and DIY enthusiasts complete projects faster and easier.
Tip: Ask for samples to test how the gasket squeezes and how tight the clamp gets before starting a big job.
Shielded hubless pipe fittings provide a tight seal and prevent leaks. They offer excellent sealing and are easy to install. These fittings are suitable for a variety of pipe types. HWKG fittings meet international standards and offer superior performance. Plumbers must consult local regulations before installation.
- Usage guidelines vary by city in Colorado.
- Shielded fittings can be used on underground or above-ground pipes if permitted by regulations.
- Kentucky allows plumbers to use hubless clamps on any hubless cast iron pipe.
Choosing certified products like HWKG ensures the safety and robustness of your piping system.
常见问题
What are the uses of shielded hubless pipe fittings?
Shielded hubless pipe fittings are used to connect pipes. They help prevent leaks and ensure a secure pipe connection. Plumbers use them in homes and workplaces for drain pipes, sewage pipes, and ventilation ducts.
How does the two-way shielding improve performance?
The two-way shielding pushes the gasket from both sides, forming a tight seal to prevent leaks. It also helps the pipe remain stable under frequent use.
Are HWKG shielded pipe fittings suitable for pipes of different materials?
HWKG shielded pipe fittings are suitable for cast iron, PVC, copper, and ABS pipes. Plumbers use them for a wide range of plumbing projects. Their design makes them easy to install and ensures a tight pipe connection.
Are shielded hubless pipe fittings easy to install?
Plumbers can quickly install shielded hubless pipe fittings. Clamps and gaskets help save time. No welding or special tools are required. This makes installation quick and easy.
Do shielded pipe fittings meet safety standards?
HWKG shielded pipe fittings are ISO9001 and cUPC certified. These certifications demonstrate the product’s safety, reliability, and superior quality. Plumbers can trust the excellent performance of these fittings.