Products / LFR

LFR

LFR is a highly-customizable flexible connection equipped with a pressed on Tri-clamp coupling.

Pressing stainless steel AISI 316L / DIN 1.4404 ferrules on to the flexible sleeve makes the entire connection airtight and gives it a smooth flow profile. The tri-clamp coupling is assembled in the same way as originally intended, with a replaceable gasket and a tri-clamp for quick assembly.
LFR can be used with a 2 bolt clamp or hinged clamp, with wing nuts, hexagon nuts, tool release or lock nuts for employee safety in case of dangerous applications. Such applications apply to when the flexible connection is close to a rotary valve, screw conveyor, butterfly valve, mill or other mechanical equipment. The LFR flexible soft connection is a great addition to the already vast program of the modular tri-clamp tubing system.

Your custom flexible connector in 5 steps

1. Consultation. What issues do you want to address? We listen to your needs and give advice.

2. Product development. Our in-house engineers design and present the best option to you.

3. Material preparation. Flexibles and metal parts are prepared according to your specifications.

4. Production. Our expert workers make your flexible connector using methods suited for your design and material.

5. Quality control. Every product undergoes strict inspection before shipping.

Consult a Filcoflex Expert

Interested in a customized solution? We are here to help you achieve the best flexible connection.

Mr. Flex O'Fit

Technical Sales

Schedule a meeting +31 (0) 416 764 764 info@filcoflex.com

Gallery

Application

The flexible soft sleeve is pressed on to the tri-clamp flanges, allowing us to make the flexible sleeve in a great variety of materials such as thermoplastics, rubbers and silicones in our custom offering. This can be done in thicknesses of 0.3mm, 1.0mm, 2.0mm and even 3.0mm. The material for the replaceable gasket ring can be made from a wide range of gasket materials for a variety of applications, this also includes multi-material gaskets such as PTFE with a Viton inner ring. Pressing stainless steel tri-clamp flanges on to the flexible connection / flexible sleeve, makes the entire connection airtight and gives it a smooth flow profile.

The LFR can be used in diverse applications including, but not limited to, weighing and dosing, ATEX, handling foodstuffs, chemical, color, and metal detection.

Options

Earthing Points and Support Ring

Support ring is added to prevent the flexible connector from collapsing on itself, especially when the length of the flexible sleeve is longer. On the other hand, earthing allows electrical current to flow safely to the ground when a system overload occurs. This reduces risk of fire, damage to equipment, and improves employee safety.

Magnets, Sensors, and Switches

To increase safety, we can weld brackets in the flanges where the flexible sleeve is pressed on to where you can mount useful tools, namely, electromagnets, sensors, proximity switches, and grounding/earthing studs.

These tools are used to detect if there is a flexible mounted, electromagnets to keep the flexible in place when the clamp is disassembled and prevent leaks, or to guard operators from mechanical moving parts that are dangerous.

Variations

We can manufacture LFR in different shapes and configurations such as:

Conical, Eccentric, Unparallel flange surfaces, With inner sleeve, Y piece / side branches / T piece, Bellow shape (symmetric and conical asymmetric), reinforcement rings against vacuum and over pressure (also in grounded editions), end cap or blind cover, spiral shaped reinforcement

Upon request, we can also create a special LFR connector according to your specifications.

Dimensions

Ø40 – Ø315 Any standardized diameter possible or see below most sold diameters Flange Length 28mm Many Tri-clamp Standards;

DIN32676 ISO1127 BS4825pt3 ASME BPE 2004 Others

Available with other types of none triclamp connections;

DIN 11864 And many others

Length is minimum 100mm, there is no maximum length

Materials

We offer the LFR in two standard polyurethane materials: PU-UF03 (0,3mm thickness) and PU-UF3 (1,0mm thickness). For customized orders, please select from the following materials:

Polyurethane (0.3mm / 1.0mm / 1.5mm)
PKPU polyurethane with knitted polyester ply (0mm)
Silicones (0mm / 3.0mm)
PKSR Polyester Knitted Fabric with Silicone (0mm)
EPDM, Gum, Nitrile (0mm / 3.0mm)
PVC, Mipolan (0mm / 3.0mm)
Silicone Weighing Bellows
Polyurethane weighing bellows
Step Bellows

For more information, please visit our Materials page.

Sizing Guide

PARAMETER	EXPLANATION
TC OD A	Triclamp Flange Outside
OD A	Tube Outside Diameters
ID A	Inside Diameter
WF A	Welding Flange Length
AL	AdapterFlange Length
CT	Counter Flange Thickness
FL	Length Flexible Sleeve
CL	Length Flexible Connector
BIHA	Length Between Tubes / Flanges
MAX	Maximum Available Build in Height
DT	Counter Flange Thickness
BL	Adapter Flange Length
WF B	Welding Flange Length
ID B	Insiden Diameter
OD B	Tube Outside Diameter
TC OD B	Triclamp Flange Outside

FAQs

What are the key benefits of using Tri-Clamp flexible connections?

They offer airtight and leak-proof connections, hygienic designs with no hollow bodies, customization options, reusable metal parts, replaceable gaskets, and options for integrating sensors and switches.

What is the minimum and maximum length for Tri-Clamp flexible connections?

The minimum length is 100mm, and there is no maximum length.

How is an LFR made?

The LFR connection is made by pressing stainless steel ferrules onto the flexible connection, creating an airtight seal and smooth flow profile.

What type of clamps can be used with LFR?

LFR can be used with a 2-bolt clamp or hinged clamp, with options for wing nuts, hexagon nuts, tool release, or lock nuts.

Can sensors or magnets be added to LFR?

Yes, brackets can be welded to the flanges to mount electromagnets, sensors, or proximity switches for safety and detection purposes.

Need more help?

We understand that deciding which product to use can be daunting. Reach out to us and we will figure out the best solution for you!

Talk to our team

Tips and Resources

We support you every step of the way. Check out our knowledge center and discover helpful material for selecting or installing your Filcoflex product.

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Filcoflex specializes in design
and manufacture of polyurethane,
silicone, rubber, and textile flexible
connections for bulk product
transport.