For more than 100 years, Keflex has been designing and manufacturing metal bellows expansion joints for the HVAC industry. We are considered a pioneer in leading the way with our innovative multi-ply bellows designs. Manufactured in accordance with EJMA guidelines that meet your HVAC and mechanical piping project specifications, Keflex expansion joints and 7Q series compensators are exclusively manufactured by Flex-Weld Inc., a division of Kelco Industries at our Woodstock Illinois facility. Contact us for your custom expansion joint piping solutions.
Flex-Weld 30MC Series General Purpose / Low Pressure Expansion Joints, are available in sizes 4” through 42”. Multi-Ply Stainless Steel Bellows construction, movement rated at 30,000 cycles plus. Manufactured to order for your specific application requirements. Available options include Flanged, Weld, or Groove Ends. Internal Flow Liner, Control Rods. Single, Dual, or Triple Bellows designs…
The original heavy-duty Keflex™ 7Q Expansion Compensators are specifically designed for high pressure service, available in sizes ¾” to 4″, in both single and dual units. The single type is capable of absorbing 2″ total movement, 1 ½” in compression and ½” in extension from the factory predetermined setting. The dual type is capable of…
The Original Multi-Ply Expansion Joint – Always Ask For Keflex™ Keflex™ 308 and 311 Series Multi-Ply Expansion Joints are the premier expansion joints in the industry. They offer the ultimate solution to piping thermal expansion problems. A wide variety of end configurations are available and pressure ratings range from vacuum to 600 PSI at room…
MULTI-PLY SAFETY FACTORS- In a critical application, a multi-ply expansion joint can, in most cases, preclude a catastrophic failure. If a failure occurs in one ply due to corrosion or fatigue, the intact plies will work as a protective barrier to contain the pressure and the medium until a replacement can be made. Flex-Weld multi-ply…
The Keflex™ 3150 Series compact Expansion Joint is designed to meet applications that require pressure ratings up to 150 PSI in a shorter length. This is achieved using 3 or 4 plies of heavier gauge stainless steel than is used in our lower pressure rated products. The 3150 series is available for pipe sizes from…
Maximum vibration absorption, Longest cycle life, Soft spring rate, Ease of installation and maximum safety. Keflex™ Bellows-Type Pump Connectors are designed to compensate for multi-plane axial, lateral and angular movement in non-torsional applications. They are intended for use in both suction and pressure lines to absorb mechanical vibrations caused by pumps, compressors and other pipeline…
We have a wider array of material and configuration types for rubber expansion joints than any other manufacturer. Our products are designed and engineered to carry a variety of media in pressure or vacuum applications. They absorb distructive system vibration and will contract or expand in response to pipe motion induced from thermal expansion and…
Keflex™ pipe guides are designed to ensure positive pipe alignment by restricting lateral pipe movement while allowing for movement along the axis of the pipe. The pipe guide consists of a spider guide that is clamped to the pipe where movement is to be restrained. The guide body is anchored. The spider moves through the…
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