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PTFE Expansion Joints

PTFE Expansion Joints

Solid-molded PTFE expansion joints are corrosion-resistant and made to withstand the high-pressure and temperature in a compact, space-saving design.

Standard sizes from 1” to 12” with two, three, or five convolutions; available in sizes up to 48”. Kadant Unaflex PTFE expansion joints can operate with temperatures from -300°F to 400°F from a full vacuum to 160 psi depending on the type and number of convolutions.

Features

  • Solid-molded PTFE with high resistance to corrosion
  • High thermal stability and resistance to age cracking
  • Short face-to-face dimensions
  • Elastomeric (Viton, EPDM, Neoprene) and metal covers available
  • Viton and Kevlar overlays available for higher pressures

Benefits

  • High strength and versatility
  • Simple retrofit into existing piping system
  • Improved flow, less turbulence
  • Reduced noise and vibration
  • Application-specific joints
  • Cost-effective solution to compensate for movement in piping systems

Custom Solutions

Have an application that requires a specialized solution? We focus on making the best solution possible with quick turnaround. We are ready to engineer your custom-designed expansion joint to fit your application. Our goal is to outperform each and every time, and we do this by working closely with our customers to develop reliable products that exceed your expectations.

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Control Units

Control Units

Replacement Level Control

Replacement Level Control
Replacement level controls are reliable and cost-effective control assemblies for servicing pressure powered pumps and pumping traps.
Float Free™ replacement level controls are designed for high-maintenance pressure pumps. Float operated replacement level controls are designed for low-maintenance pressure pumps. Both solutions will retrofit major float operated pump brands.

Float Free Operated

  • 90 pph max capacity
  • 2-probe conductance design eliminates moving parts for extended life
  • Remote monitoring capability maximizes performance
  • Pneumatic or solenoid operated for application flexibility
  • Retrofits competitive pumps for easy installation
  • Electrical hookup required

Float Operated

  • 14.5 kpph max capacity

  • Stainless steel, reinforced float mechanism for longer life
  • Open coil design prevents spring hammering and contamination
  • Retrofits competitive pumps for easy installation
  • No electrical hookup required

Optimizing Performance

Choosing the right replacement level control will depend on your specific application and duty cycle. We offer product and system knowledge as well as field service support to choose and integrate the right replacement level control for pressure pump and pump trap maintenance.

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Related

  • Float Level Control Condensate Pump

    Float Level Control Pressure Powered Pump

  • Float Free™ Level Control Condensate Pump

    Float Free™ Level Control Pressure Powered Pump

  • Steam Systems

    Steam Systems

Research & Development

Kadant Drum Interior

While most suppliers are preparing for the future, we are creating it. Our research and development activities are the force behind the patented technologies and innovative products that we bring to process industries worldwide. Our global research and development center, located in Three Rivers, Michigan, features 18 test machines and 43 test positions and includes a tribology laboratory, two isolation rooms, and a learning center with theater-seating for 50. In addition to internal product development activities, our research center allows customers to simulate their own operating conditions and applications to identify and quantify opportunities for improvement.

Rotary Joints & Rotary Unions

Rotary joints transfer media into and out of rotating equipment. They are also known as rotary unions and rotating unions. Common media includes steam, condensate, thermal oil, coolant, air, and hydraulic oil. The experts at Kadant will help you choose the optimal rotary joint for your application.

Rotary joint sealing technology is essential to provide durable, leak free performance. The sealing technology used depends on process speed, pressure, temperature, and media. Our standard rotary joints will cover most applications and are designed to transfer one or two media simultaneously while our multi-pass rotary unions can transfer up to twelve media types in omnidirectional flow. Our experts can also design custom rotary unions for unique applications.

What are the different rotary joint types?

  • rotary joints

    Standard Rotary Joints

  • Multi-Pass Rotary Unions

  • Custom Rotary Unions

FAQ

  • What information do I need to re-order a rotary joint?

    Either the existing rotary joint part number or our experts can help identify your product using photos and order history.

  • What are the differences in sealing technology?

    Demanding applications use mechanical seal technology. Pressure type mechanical seals increase sealing force with increased pressure, increasing the sealing capability. Balanced type mechanical seals only increase sealing force slightly, reducing wear on the seal materials. Less demanding applications use DuraSeal™ O-ring seal technology.

  • Can I replace someone else’s rotary joint with a Kadant rotary joint?

    Yes. An existing rotary joint can be replaced with a Kadant rotary joint. Our experts can cross over the part number or select a rotary joint based on your operating conditions. Either way, our experts will find a solution.

  • What are the mounting differences in rotary joints?

    Self-supported rotary joints either mount directly to the rotating shaft, while bracket or lug supported joints are mounted to the surrounding framework. Self-supported rotary joints are more universal to mount while supported joints are more robust to misalignment or side loading from piping.

Learn more about rotary joints & unions

  • The History of the Rotary Joint

    Read more

  • 8 Things You Need to Know About Rotary Joints & Unions

    Read more

  • How to Select the Right Rotary Joint for Your Application

    Read more

  • Carbon Guides vs. Rolling Element Bearings

    Read more

  • Rotary Joint Requirements for Paper Production

    Read more

  • Choosing the Right Rotary Joint for Your Corrugator

    Read more

Rubber Expansion Joints

  • Rubber Expansion Joints
  • Rubber Expansion Joints
  • Rubber Expansion Joints
  • Rubber Expansion Joints

Hand-crafted rubber expansion joints provide relief from stresses caused by thermal expansion and contraction in pipelines. 

Rubber expansion joints are available in single- and multiple-arch designs and are custom-built to fit your application requirements. Options include PTFE-lined, concentric reducing, eccentric reducing, filled arch, lightweight, and off-set configurations. With a wide range of elastomers, Kadant Unaflex rubber expansion joints can be designed to operate up to 200 psi and with temperatures up to 500°F in sizes from 1/2” up to 144”.

Features

  • Hand-crafted rubber expansion joints

  • Available in multi-arch, filled-arch, taper, offset, and custom configurations
  • Standard and special drilling including ANSI, DIN, JIS, and Navy
  • Available PTFE-lining

Benefits

  • Multi-purpose construction
  • Simple retrofit into existing piping system
  • Improved flow, less turbulence
  • Application-specific joints
  • Cost-effective solution to compensate for movement in piping systems

Custom Solutions

Have an application that requires a specialized solution? We focus on making the best solution possible with quick turnaround. We are ready to engineer your custom-designed expansion joint to fit your application. Our goal is to outperform each and every time, and we do this by working closely with our customers to develop reliable products that exceed your expectations.

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  • Expansion Joint Basics

    Read more

  • Rubber Expansion Joint Applications

    Read more

  • Rubber Expansion Joint Advantages Compared to Metal Expansion Joints

    Read more

  • Polymer Selection in Rubber Expansion Joints

    Read more

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Control Units

Control Units

RX® Rotary Unions

RX Rotary Union
The RX rotary union uses a balanced seal with special ball bearing or optional tapered roller bearings to support the rotor.

This rotary union incorporates the latest technology in mechanical seal design for water and thermal oil service. The high thrust load capability and carbon-to-silicon (or Tungsten) carbide seal package makes the RX rotary union run longer and with less maintenance requirements that other ball bearing designs. All O-rings are fully captured in glands and seal-loading springs do not contact the process fluid. The RX rotary union features a barrier in the seal chamber to extend bearing life and a nipple and assembly plate made of stainless steel. Available in single- and dual-flow configurations and sizes from 3/8” to 6”, the RX rotary union is capable of operating up to 500°F (260°C), 360 psi (25 bar), and 3,500 rpm.

Features

  • Balanced seal
  • Deep-groove ball bearings
  • Full flow area
  • External loaded springs
  • Matched seal faces
  • Integral nipple flange mounting
  • On-machine seal replacement

Benefits

  • Long running life, dry running capability
  • High capacity for conventional applications

  • Low pressure drop

  • Uniform seal loading
  • Materials selected for specified service
  • Rigid mounting and accurate alignment
  • Reduced maintenance

Custom Solutions

Have an application that requires a specialized solution? Kadant Johnson’s product innovation team focuses on making the best solution in the shortest time possible. Kadant Johnson’s engineering team is committed to providing technology that meets customers’ application demands. Our goal is to work closely with our customers to develop reliable, efficient, and technically advanced products that add value by improving the process and the quality of the end product.

Media

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  • Flexible Metal Hose

    Flexible Metal Hose

  • Sight Flow Indicators

    Sight Flow Indicators

  • Rotary Joints & Rotary Unions

    Rotary Joints & Rotary Unions

Services

Our specialized mechanical, testing, and audit services ensure your critical equipment is operating at peak performance.

Operational excellence requires safe and reliable equipment be properly installed and maintained. It also requires regular inspection and testing of critical components to avoid premature failure or costly unplanned downtime. Our specialized service technicians have extensive training and certifications to provide you with skilled installation, repair, inspection, and testing services.

We Offer

Sight Flow Indicators

Sight Flow Indicators
Sight flow indicators are engineered to provide maximum visual observation of liquid and gas flows through pipelines.

All glass windows are made of borosilicate glass and can be furnished with special Mica liners to protect against erosion and corrosion. Bodies are available in both ductile iron and bronze and range in sizes from 3/8" to 4" with threaded and flanged options.

  • PSFF

    PSFF

    • Available in sizes: 1 1/4" to 4"
    • Body connections: Flanged, Class 150
    • Pressure rating: 75 psi (5 bar)
    • Temperature rating: 350° F (177°C)
  • PSFS

    PSFS

    • Available in sizes: 3/8" to 2 1/2"
    • Body connections: Threaded
    • Pressure rating: 75 psi (5 bar)
    • Temperature rating: 350° F (177°C)
  • DSF/DBSF

    DSF/DBSF

    • Available in sizes: 3/8" to 1 1/4"
    • Body connections: Threaded
    • Pressure rating: 140 psi (10 bar)
    • Temperature rating: 300° F (149°C)
  • TSF

    TSF

    • Available in sizes: 1" to 3"
    • Body connections: Flanged, Class 150
    • Pressure rating: 150 psi (10 bar)
    • Temperature rating: 365°F (185°C)

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Standard Rotary Joints & Rotary Unions

A rotary joint, also referred to as a rotary union or rotating union, is a rotary sealing device that connects rotating equipment to fixed piping for the transfer of steam, water, thermal oil, coolant, hydraulic oil, air, and other media.

We invented the rotary pressure joint in 1930. Since then, we have incorporated advances in sealing technology from carbon pressure seals to balanced seals and DuraSeal™ sealing technology. Rotary joint design and materials have evolved as well to extend the application range and service life of the conventional pressure-type rotary joint.

What are the different rotary joint types?

  • SX® Rotary Joints

    SX® Rotary Joint

    Steam, Thermal Oil

    Size Range: 3/4" - 3"
    Pressure (Max): 20 bar, 300 psi
    Temperature (Max): 288°C, 550°F
    Speed: 550 RPM

  • EL™ Rotary Joints

    ELS™ Rotary Joint

    Steam, Thermal Oil

    Size Range: 2" - 3-1/2"
    Pressure (Max): 20 bar, 300 psi
    Temperature (Max): 288°C, 550°F
    Speed: 550 RPM

  • ELSX™ Rotary Joints

    ELSX™ Rotary Joint

    Steam, Thermal Oil

  • RX® Rotary Unions

    RX® Rotary Union

    Water, Air, Thermal Oil

    Size Range: 3/8" - 6"
    Pressure (Max): 20 bar, 300 psi
    Temperature (Max): 288°C, 550°F
    Speed: 550 RPM

  • G™ Rotary Unions

    G™ Rotary Union

    Air, Coolant, Hydraulic

    Size Range: 1/4" - 5/8"
    Pressure (Max): 20 bar, 300 psi
    Temperature (Max): 288°C, 550°F
    Speed: 550 RPM

  • PT2X™ Rotary Joint

    PT2X™ Rotary Joint

    Steam

  • CorrPro® Rotary Joints

    Corrpro® Rotary Joint

    Steam

  • LJ-PT Rotary Joints

    LJ-PT™ Rotary Joint

    Steam

  • LJX Rotary Joints

    LJX™ Rotary Joint

    Steam

  • C-Cast Rotary Unions

    C-Cast™ Rotary Union

    Water

  • BCI Rotary Unions

    BCI™/BCIM™ Rotary Unions

    Water

  • Multi-Passage Rotary Union

    Multi-Passage Rotary Union

    Multiple Types

    2 to 12 passages,
    each passage 1⁄8", 1⁄4", 3⁄8", or 1⁄2"

    Pressure (Max): 20 bar, 300 psi
    Temperature (Max): 288°C, 550°F
    Speed: 550 RPM

  • Over-the-Shaft Rotary Unions

    Over-The-Shaft Rotary Union

    Multiple Types

Custom Needs?

Application Specific Solutions

Our product innovation team focuses on making the best solution in the shortest time possible. We provide rapid design and manufacturing services to ensure our new project solutions process for custom rotary unions and swivel joints put our customers at the center of our schedule.

Custom Rotary Unions

Custom Rotary Unions

Learn More

Our streamlined custom engineered innovation cycle ensures your project moves quickly and seamlessly from the concept to prototype production.

Stories

  • 8 Things You Need to Know About Rotary Joints & Unions

    Read more

  • Carbon Guides vs. Rolling Element Bearings

    Read more

Steam Systems

Our deep expertise in heat transfer through rotating cylinders combined with an intimate knowledge of steam and condensate make Kadant Johnson a trusted steam system solution provider.

Operational excellence requires safe and reliable steam systems be properly designed, engineered, and installed. It also requires the ability to safely operate and control the system and its related components under a wide range of operating conditions. The best steam systems are designed to manage blow-through steam, flash steam, and efficiently return condensate to the boiler. Our specialized systems engineers and project managers have extensive training and certifications to provide you with the best solution possible for your steam and condensate system requirements.

See Our Research & Development

We Offer