Products / LFDDC

LFDDC

LFDDC is a practical flexible connection equipped with bolted on tri-clamp flanges and reusable metal parts.

The tri-clamp flange is machined together with a bolt pattern flange or is welded together from a bolt pattern flange, together with a tri-clamp flange. The standard tri-clamp gasket is replaceable, as well as the gaskets that seal the adapter flange to the flexible connector. With the LFDDC, you have the advantage of re-using all metal parts and replace the flexible sleeve, making it a cost-effective investment.
The assembly can be done with a wide range of bolts and bolt heads, from various materials, washers can be used, as well as nuts, or threaded flanges. Standard is a hexagon head, 2 washers and a nut, for easy disassembly. Other options could be counter sunk bolts, threaded flanges instead of nuts or flanged bolts to replace washers.

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 764info@filcoflex.com

Application

Hygienic Production

The design of LFDDC is based on the principles of the Flange Fitted flexible connection. It has quick connection type flanges welded or machined together with the flange with bolt pattern. As a result, not only tri-clamp is possible, but almost any type of flange with a quick action coupling. A Flange Fitted connection has the best sealing properties and the least amount of crevices, trapped corners or edges, making it the best way to connect a flexible sleeve to a ducting part. By machining a conical edge on the inside, the whole LFDDC becomes free of any unhygienic entrapment or hard to clean places. This makes it a hygienic coupling, because of the rigid metal adapter parts making it vacuum and over pressure-resistant at the same time. There are many application options, including specific options for weighing and dosing techniques, ATEX, foodstuffs, chemical and color and metal detection.

Cost-effective solution

When the flexible sleeve is worn out, it can be easily replaced. This makes the LFDDC a cost-effective solution that allows all metal parts to be reused. Furthermore, by using the standard couplings on the market, you can use a wide variety of connection clamps, such as the standard tri-clamp accessories or the versions which allow for tool release or a padlock for instance. Brackets or braces can be placed or can be incorporated in the design to fit magnets, switches, contacts or other electronic devices that either detect the presence of a flexible connection or keep it in place such as electromagnets can do, even when the clamps are removed. It can also be made suitable for lock out tag out (LOTO). This can all be of importance when the flexible connection is close to a rotary valve, screw conveyor, butterfly valve, mill, other mechanical equipment or when a harmful gas is present inside the tubing.

Options

Adapter Flange Materials

The following flange materials are available for LFDDC:

  • AISI 316 L / DIN 1.4404
  • AISI 304 / DIN 1.4301
  • Hastelloy
  • PTFE
  • Duplex
  • Aluminium
  • Uranus
  • Others upon request

Flange Surface Finish

To improve the flange's performance and withstand environmental conditions, we offer different finishes depending on your requirement

  • Polished, Ra 0.4 or Ra 0.8
  • H2O blasting /SUBLIMOTION-process® / ViwateQ®
  • Glass Bead Blasted
  • Others upon request

Adapter Flange Length

Standard length is 34mm. Shorter than this is not possible. Longer lengths on request.


Variations

Conical, Eccentric, Unparallel flange surfaces, Added insided Sleeve Y piece / side branch / 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

We also offer special designs upon request.


Dimensions

LFDDC can be made with a minimum of 130mm and no maximum length from Ø40 to Ø315 (any standardized diameter is possible, please consult our tri-clamp flange availability). Our tri-clamp standards include the following:

  • DIN 32676
  • ISO 1127
  • BS4825pt3
  • ASME BPE 2004
  • Others

Other types of non-tri-clamp connections are also possible in DIN 11864 and DIN 11851 (others upon request).


Materials

Depending on your application, we can create the LFDDC in the following materials:

  • Poly Urethane (0.3mm / 1.0mm / 1.5mm)
  • PKPU Poly Urethane 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)
  • PTFE film in various thicknesses
  • Nomex
  • Woven Fabric (PTFE / Cotton and other)
  • Poly Urethane weighing bellows
  • Step Bellows

For more information, please visit our Materials page.


Sizing Guide

Size Guide Image
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 Length
BL Adapter Flange Length
WF B Welding Flange Length
ID B Inside Diameter
OD B Tube Outside Diameter
TC OD B Triclamp Flange Outside

FAQs

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.
The minimum length is 100mm, and there is no maximum length.
The LFDDC is assembled using different components, with at least one side fitted with a Tri-Clamp flange. It uses a bolt pattern flange, with a machined or welded tri-clamp flange.
Available materials include AISI 316 L, AISI 304, Hastelloy, PTFE, Duplex, Aluminum, and Uranus.
The adapter flange length is 34mm, with longer lengths available upon request.

Need more help?

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