Product information

De LFDDC is a connector that is assembled using different components and at least one side is fitted with a Triclamp flange connection. The Triclamp connection has the advantage that it is easy to disconnect.

All the different parts that compose the connector make it the most leak tight connector in our assortment.

In addition this connector has been tested and certified and subjected to a specially designed standard operation procedure and traceability program, making it the safest product to use in any high risk production process. Risks could include explosion, leaking of dangerous chemicals, extremely hygienic processes for foodstuffs and so on.


  • Leak tight
  • Quick assembly
  • High chemical resistance
  • High temperature resistance
  • High pressure resistance
  • CIP cleaning
  • Anti Static
  • comes with 2.2 and 3.1 certification

The LFDDC is a combination of two types of connections at the end by using a LFDDC adapter. The LFDDC coupling adapter is a Tri-Clamp coupling and a flat flange with bolt holes on the other end.

The flexible sleeve is fitted with a thermally formed, glued or welded flat flange made from the same flexible material as the sleeve.

This flexible flange is then fitted between two hard flanges made from either metal or plastic with a special seal for the LFDDC adapter.

The bolt flange connection is fitted with a conically shaped inside so there are absolutely no edges or dead corners in the transistion from adapter to flexible sleeve; to create optimal hygiene, aerodynamics and make it easy to clean.

After the sleeve is mounted on the LFDDC flat flange, the Tri-Clamp side can be connected to the machine that is also fitted with a Tri-Clamp ferule, thus making it easy to assemble.

A wide range of materials, special shapes, longer lengths, earthing, countersunk bolts, threaded flanges are available, making the variations to the LFDDC connector endless.

There is also the possibility to use other flange types, like dairy couplings, aseptic couplings, Jacob couplings, Ehedge approved flanges, 3A sanitary approved flanges, reinforcement/anti collapse rings, explosion jacketing, seamless sleeves, pharmaceutical approved materials, fire retardant materials.

Adapter flange

  • Hastelloy
  • PTFE
  • Duplex
  • RVS 316L 1.4404 (standard)
  • Polyurethane
  • HDPE Polyethylene
  • RVS304
  • Steel
  • Titanium

Flexible sleeves + flanges

  • Heat resistant materials
  • antistatic materials
  • explosion pressure resistant
  • pressure resistant
  • chemical high resistant
  • super flexible
  • transparent
  • Silicone with or without ply/reinforcement
  • PVC films
  • Polyurethane films
  • Rubbers
  • PTFE films
  • Woven polyester and Glass fibres with thermoplastic, silicone or rubber coating

Counter flange with hole pattern

  • Hastelloy
  • PTFE
  • Duplex
  • RVS 316L 1.4404 (standard)
  • Polyurethane
  • HDPE Polyethylene
  • RVS304
  • Steel
  • Titanium

Bolts & Nuts

  • Nuts
  • Threaded flange
  • Bolts
    • Hexagon bolts
    • Bolts with countersunk head
    • Bolts with Allen key
    • Bolts with round head and flange
  • Bolts from several materials
    • V2A
    • V4A
    • Titanium
Tests & Certificates


Every LFDDC is put together with the greatest care in a clean production facility. All tools are used exclusively for LFDDC assembly to avoid contamination with silicones and/or glass fibres. To test and guarantee the quality of the LFDDC a Standard Operation Procedure (SOP) is written for both Filcoflex production staff and the clients technical service employees that are responsible for maintenance and repairs.

All components are supplied with 3.1 and 2.2 certification. All parts are traceable and every compensator is numbered with its own unique serial number.  Every LFDDC compensator is subdued to a pressure test before leaving the factory. This process is documented, filmed and photographed for review.

All results are documented per product and serial number on a test certificate that is matched to the specific serial number. Electrostatic charge increases explosion risk, therefor LFDDC is available in conductive materials. Every conductive LFDDC is tested on its electrostatic properties before leaving production. This process is documented and photographed.



Special features

In addition to this a number of special features can be added to the fitting, such as:

  • Earthing/Grounding
    • Electrostatic conductive materials
    • Earthing/Grounding wires/litzes between the flanges
  • Assembly points and brackets on the flanges with:
    • Electromagnets
    • Rods for movement restriction
    • Sensor bracket
  • Explosion shield and/or spray shield against leakage
The flanges are available in:

  • Stainless steel AISI 316 L / DIN 1.4404, Ra0,8 (standard)
  • Stainless steel AISI 316 L / DIN 1.4404, Ra0,4
  • Stainless steel AISI 304    / DIN 1.4301, Ra0,8
  • Hastelloy

The sleeve can be produced in the following materials:

Name Description Color Thickness Temperature range Certification
PU-UF03 Polyurethane Transparent 0,3 mm -40 to +90 FDA / ECC
PU-UF1 Polyurethane Transparent 1 mm -40 to +90 FDA / ECC
PU-UF3 Polyurethane Transparent/Milky White 1 mm -40 to +90 FDA / ECC
PU-UF15 Polyurethane Transparent 1,5 mm -40 to +90 FDA / ECC
SIL 2 Silicone Translucent 2 mm -60 to +200 FDA / ECC
SIL 3 Silicone Translucent 3 mm -60 to +200 FDA / ECC
SIL BLUE Silicone Metal Detectable Blue 3 mm -60 to +200 FDA / ECC
PKSR Silicone with Polyester Knitted Ply Translucent/White 2 mm -30 to +160 FDA / ECC
PTFE 2109 PTFE Cross laminated film White 0,22 mm +300 FDA / ECC
PTFE 2109 PTFE Cross laminated film White 0,22 mm +300 FDA / ECC
PTFE 2112 Antistatic PTFE Cross laminated film Black 0,3 mm +300 FDA / ECC
PTFE 2120 Antistatic PTFE Cross laminated film Black 0,5 mm +300 FDA / ECC
PTFE 2112 TR PTFE Cross laminated film Translucent 0,3 mm +300 FDA / ECC
PTFE 2120 TR PTFE Cross laminated film Translucent 0,5 mm +300 FDA / ECC
EPDM W EPDM White FDA White 2 / 3 mm -30 to +100 FDA / ECC
EPDM AS EPDM Antistatic Black 2 / 3 mm -30 to +100 FDA
GUM Natural Gum Rubber White / Beige 2 / 3mm -30 to +80 FDA / ECC
WEA Wear Flex White or Black 2 / 3 mm -30 to +80 N/A
Nomex Nomex Aramide, 1 side silicone coated White 0,40 mm -30 to +200 N/A
GW-1xSR-1250rd Glass Fibre, 2 sides silicone coated Red 0,90 mm -60 to +220 N/A

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