LFDDC Flexible Connection

Advantages

• • Easy Connection
  • Hygienic Connections
  • No hollow bodies
  • Any standardized or custom diameter
  • Robust
  • Air Tight
  • Leak proof
  • Large variety of flexible materials
  • Standard AISI 316L / DIN 1.4404
  • Custom made
  • Replaceable gasket (see accessories)
  • Reusable metal parts and flanges
  • Suitable for PTFE flexible connections

LFDDC is a flexible connection equipped with bolted on Tri-Clamp flanges.

The triclamp flange is machined together with a bolt pattern flanges, or is welded together from a bolt pattern flange together with a tri-clamp flange.

The standard tri-clamp gasket is replaceable, as well are the gaskets that seal the adapter flange to the flexible connector.

For both gaskets there is a choice out of a wide range of gasket materials.

All the metal parts can be re-used when the flexible sleeve is replaced, this is a great advantage.

The assembly can be done by 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 and flanged bolts to replace washers.

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 or other mechanical equipment, or when a harmful gas is present inside the tubing.

The LFDDC was initially designed to connect PTFE flexible connections in the most airtight, dust tight, fluid tight manor, and making all the parts re-useable when the flexible sleeve was broken. The design is based on the Flange Fitted principal, and has quick connection type flanges welded or machined together with the flange with bolt pattern. Therefor not only tri-clamp is possible, but almost any type of flange with a quick action coupling.

A flange fitted flexible connection has the best sealing properties and the least amount of crevices or 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 became free of any unhygienic entrapment or hard to clean places. Making it a hygienic coupling. Because of the rigid metal adapter parts , it becomes vacuum and overpressure resistant at the same time as well as fully customizable to your demands.

There are many application options, including specific options for weighing and dosing techniques, Atex, foodstuffs, chemical and color and metal detection.

Adapter Flange materials

On the LFDDC the following flange materials are available;

• • AISI 316 L / DIN 1.4404
  • AISI 304 / DIN 1.4301
  • Hastelloy
  • PTFE
  • Duplex
  • Aluminum
  • Uranus
  • Others on request

Surface Finish Flanges

Surface finishes can be customized, such as;

• • Polished, Ra0.4 or Ra 0.8
  • H2O blasting / Sublimotion / Viwateq
  • Glass Bead Blasted
  • Others on request

Adapter Flange Length

• • 34mm
  • Shorter is not possible
  • Longer lengths on request

Variations

• • Conical
  • Eccentric
  • Unparallel flange surfaces
  • Added insided Sleeve
  • Y piece / side branche / T piece
  • Bellow shape, symmetric and conical asymmetric
  • Reinforcement rings against vacuum and overpressure (also in grounded editions),
  • End cap or blind cover
  • Spiral shaped reinforcement
  • Many more

Dimensions

• • DN 60 – DN 315
  • Many Tri-clamp Standards
    • DIN32676
    • ISO1127
    • BS4825pt3
    • ASME BPE 2004
    • Others
  • Available with other types of none tri-clamp connections
    • DIN 11864
    • DIN 11851
    • And many others
  • Length is minimum 100mm, there is no maximum length.

Materials

For more information please go to our Materials Comparison Table

• • Poly Urethane 0.3mm / 1.0mm / 1.5mm
  • PKPU  Poly Urethane with knitted polyester ply 2.0mm
  • Silicones 2.0mm / 3.0mm
  • PKSR Polyester Knitted Fabric with Silicone 2.0mm
  • EPDM, Gum, Nitrile 2.0mm / 3.0mm
  • PVC, Mipolan 2.0mm / 3.0mm
  • PTFE film in various thicknesses
  • Nomex
  • Woven Fabric (PTFE / Cotton and other)
  • Poly Urethane weighing bellows
  • Step Bellows

SIZES FOR DIN 32676 SERIES 2 STANDARD & NON STANDARD

DN	DIAMETER IN	DIAMETER OUT	WALL THICKNESS	FLANGE OUT	LENGTH
65	66	70	2	91	28
80	81	85	2	106	28
100	100	104	2	119	28
125 S	125	129	2	144,4	28
125 B	125	129	2	155	28
150 S	150	154	2	167	28
150 B	150	154	2	183	28
200 S	200	204	2	217,4	28
200 B	200	204	2	233,5	28
250	250	254	2	268	28
300	300	304	2	319	28

SIZES FOR ISO 1127

DN	DIAMETER IN	DIAMETER OUT	WALL THICKNESS	FLANGE OUT	LENGTH
65	72,1	76,1	2	91	21,5
80	84,9	88,9	2	106	21,5
100	110,3	114,3	2	130	28
125	135,7	139,7	2	155	28
150	163,1	168,3	2,6	183	28
200	213,9	219,1	2,6	233,5	28
250	267,8	273	2,6	286,1	28
300	318,7	323,9	2,6	338,5	28

SIZES FOR BRITISH STANDARD 4825 PT

INCH	DIAMETER IN	DIAMETER OUT	WALL THICKNESS	FLANGE OUT	LENGTH
2 1/2	60,3	63,75	1,73	77,5	21,5
3	73	76,45	1,73	91	21,5
3 1/2	84,7	88,9	2,1	106	21,5
4	97,6	101,85	2,13	119	21,5
4 1/2	110,3	114,95	2,33	130	28
5	123	127	2	144,4	28
5 1/2	135,76	140,55	2,4	155	28
6	150	154	2	167	28
6 5/8	163,1	169,35	3,13	183	28
8	200	204	2	217,4	28
8 5/8	213,9	220,55	3,35	286,1	28
10	250	254	2	268	28
10 5/8	266,3	273	3,35	286,1	28
12	300,8	304,8	2	319	28
12 5/8	315,9	319,9	2	338	28
12 5/8	315,9	323,8	3,95	338	28