EXPANSION JOINTS

Compentek is NUMBER ONE SOLUTION PROVIDER of EXPANSION JOINTS in Finland

Compentek is Finland’s leading supplier of expansion joints.
Over the decades, we have delivered thousands of projects
to process industry and energy production facilities.

FABRIC EXPANSION JOINTS

RUBBER EXPANSION JOINTS

METAL EXPANSION JOINTS

OTHER BELLOWS

Fabric expansion joints

Compentek designs Fabric panels for equalizing thermal movements and vibrations in ductwork, boilers and process industries.

Equipment such as fans, filters, turbos and conveyors are often connected to the process using fabric bellows. A special advantage of fabric beams is their suitability for many applications, from gas turbines to air pipes. In addition to compression and stretching, the fabric beams receive rotational movement, which e.g. metal bellows are unable to receive. With the help of the raised frame solution, fabric beams can be used to connect parts of processes with more than a thousand degrees. The size of the bellows can vary from a collar-mounted small DN100 pipe up to 15x5m boiler bellows. The materials vary depending on the conditions, from single-layer EPDM-coated fabric to almost 10-layer gas turbine bellows.

With the right design, knowledge of the conditions and the right material choices, we can design and deliver not only a long-lasting

but also a very cost-effective fabric bellows solution to your process.

Fluachem 3N triple PTFE laminate bellows for aggressive gases.

When choosing the bellows type and structure, e.g. the temperature and possible humidity of the gas or air passing through the duct. Gas-tight bellows types include e.g.
Fluaflex© multi-layer construction, for hot exhaust gas and air ducts and process fans
Fluachem© single/multi-layer structure for humid conditions and aggressive gases. Among other things, pipes, ducts, pipelines and fans. The materials are cross-laminated PTFE and elastomers such as Viton (FKM), EPDM, nitrile and butyl.
Flexepdm© and Flexnit© single-layer elastomer bellows, e.g. for fans, also food approved
Flexgns© for fans for wet gases. Layered and vulcanized EPDM rubber construction with integrated mounting flanges
Fluastal© gas turbine bellows, up to 8 layers
Flexpa© PVC fabric bellows straighteners, also food approved

Rubber bellows

Rubber bars are used typically in the transport of liquid, the thermal movement and/or vibration of the pipeline as equalizers. Our selection includes:

1) Delivered from stock D-type standard rubber bellows with rotating flanges for pipes DN25 – DN700 (see below)
2) Made-to-order collared DFS rubber bellows for pipes DN50 – DN3000 and
3) Collared GNS connectors to fans for condensation gases

Made-to-order flanged DFS rubber bellows and GNS connectors

Made to measure from synthetic or natural rubber, DFS rubber bellows are manufactured at our factory in the Czech Republic and the bellows are baked in a large vulcanizing oven. DFS bellows can be rectangular or round up to a maximum diameter of 3.6m. A typical application for DFS rubber bars is a cooling water pipeline
(e.g. in connection with the blast furnace of a steel factory).

In fans (e.g. Fläkt, Koja, Ferrari) high-quality rubber GNS connectors are used on both the suction and pressure side, when there is a need to transport moist process or flue gases. The flanges of the GNS connector are vulcanized into the rubber, making the bellows easy and quick to install.

D-type storable standard rubber bellows

You can find the standard rubber bellows that suit your needs in the attached measurement table.

DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Liikkeet / Movements
DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Pitkittäinen / Axial mm				Poikittainen / Lateral	Kulma / Angular
mm	Inch	mm/inch		kPa(G)	Puristus / Compression		Venymä / Elongation		mm	°
20	3/4”	130/5	150/6	1600	30	35	15	20	20	25
25	1”	130/5	150/6	1600	30	35	15	20	20	25
32	11/4”	130/5	150/6	1600	30	35	15	20	20	25
40	11/2”	130/5	150/6	1600	30	35	15	20	20	25
50	2”	130/5	150/6	1600	30	35	15	20	20	20
65	21/2”	130/5	150/6	1600	30	35	15	20	20	20
80	3”	130/5	150/6	1600	30	35	15	20	20	20
100	4”	130/5	150/6	1600	30	35	15	20	20	15
125	5”	130/5	150/6	1600	30	35	15	20	20	10
150	6”	130/5	150/6	1600	30	35	15	20	20	10
200	8”	–	150/6	1600	–	35	–	20	20	8
200	8”	130/5	200/8	1600	30	40	15	20	20	8
250	10”	130/5	200/8	1600	30	40	15	20	20	6
300	12”	130/5	200/8	1600	30	40	15	20	20	6
350	14”	–	200/8	1000	–	40	–	20	20	6
400	16”	–	200/8	1000	–	40	–	20	20	5
450	18”	–	200/8	1000	–	40	–	20	20	5
500	20”	–	200/8	1000	–	40	–	20	20	5
600	24”	–	250/10	1000	–	40	–	20	20	4
650	26”	–	250/10	1000	–	40	–	20	20	3
700	28”	–	250/10	1000	–	40	–	20	20	3
750	30”	–	250/10	1000	–	40	–	20	20	3

(*) stock dimensions with intermediate sales conditions. Other sizes according to the offer. Flange drilling depends on the PN pressure class of the DIN standard. It is also possible to deliver flanges according to the JIS, ANSI and AWWA standard according to the offer. Warehouse flanges electro-galvanized or hot-dip galvanized; epoxy painting also possible.

DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Liikkeet / Movements
DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Pitkittäinen / Axial mm				Poikittainen / Lateral	Kulma / Angular
mm	Inch	mm/inch		kPa(G)	Puristus / Compression		Venymä / Elongation		mm	°
20	3/4”	130/5	150/6	1600	30	35	15	20	20	25
25	1”	130/5	150/6	1600	30	35	15	20	20	25
32	11/4”	130/5	150/6	1600	30	35	15	20	20	25
40	11/2”	130/5	150/6	1600	30	35	15	20	20	25
50	2”	130/5	150/6	1600	30	35	15	20	20	20
65	21/2”	130/5	150/6	1600	30	35	15	20	20	20
80	3”	130/5	150/6	1600	30	35	15	20	20	20
100	4”	130/5	150/6	1600	30	35	15	20	20	15
125	5”	130/5	150/6	1600	30	35	15	20	20	10
150	6”	130/5	150/6	1600	30	35	15	20	20	10
200	8”	–	150/6	1600	–	35	–	20	20	8
200	8”	130/5	200/8	1600	30	40	15	20	20	8
250	10”	130/5	200/8	1600	30	40	15	20	20	6
300	12”	130/5	200/8	1600	30	40	15	20	20	6
350	14”	–	200/8	1000	–	40	–	20	20	6
400	16”	–	200/8	1000	–	40	–	20	20	5
450	18”	–	200/8	1000	–	40	–	20	20	5
500	20”	–	200/8	1000	–	40	–	20	20	5
600	24”	–	250/10	1000	–	40	–	20	20	4
650	26”	–	250/10	1000	–	40	–	20	20	3
700	28”	–	250/10	1000	–	40	–	20	20	3
750	30”	–	250/10	1000	–	40	–	20	20	3

(*) varastomitat välimyyntiehdoin. Muut koot tarjouksen mukaan. Laippareijitys riippuu PN paineluokasta DIN standardin. Myös JIS, ANSI and AWWA-standardin mukaiset laipat on mahdollista toimittaa tarjouksen mukaisesti. Varastolaipat sähkösinkittyinä tai kuumasinkittyinä; epoksimaalaus myös mahdollinen.

DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Liikkeet / Movements
DN Ø* (NB)		Pituus / Length*		Käyttöpaine Working pressure	Pitkittäinen / Axial mm				Poikittainen / Lateral	Kulma / Angular
mm	Inch	mm/inch		kPa(G)	Puristus / Compression		Venymä / Elongation		mm	°
20	3/4”	130/5	150/6	1600	30	35	15	20	20	25
25	1”	130/5	150/6	1600	30	35	15	20	20	25
32	11/4”	130/5	150/6	1600	30	35	15	20	20	25
40	11/2”	130/5	150/6	1600	30	35	15	20	20	25
50	2”	130/5	150/6	1600	30	35	15	20	20	20
65	21/2”	130/5	150/6	1600	30	35	15	20	20	20
80	3”	130/5	150/6	1600	30	35	15	20	20	20
100	4”	130/5	150/6	1600	30	35	15	20	20	15
125	5”	130/5	150/6	1600	30	35	15	20	20	10
150	6”	130/5	150/6	1600	30	35	15	20	20	10
200	8”	–	150/6	1600	–	35	–	20	20	8
200	8”	130/5	200/8	1600	30	40	15	20	20	8
250	10”	130/5	200/8	1600	30	40	15	20	20	6
300	12”	130/5	200/8	1600	30	40	15	20	20	6
350	14”	–	200/8	1000	–	40	–	20	20	6
400	16”	–	200/8	1000	–	40	–	20	20	5
450	18”	–	200/8	1000	–	40	–	20	20	5
500	20”	–	200/8	1000	–	40	–	20	20	5
600	24”	–	250/10	1000	–	40	–	20	20	4
650	26”	–	250/10	1000	–	40	–	20	20	3
700	28”	–	250/10	1000	–	40	–	20	20	3
750	30”	–	250/10	1000	–	40	–	20	20	3

Metal bellows

Metal bellows are the largest group of bellows in terms of volume. The applications are diverse; they compensate for vibrations and thermal movements, e.g. in diesel engines, steel mills, chemical plants, power boilers, district heat transfer and oil refining.

The main difference to fabric bellows is that metal bellows can be designed to withstand the desired pressure. Compentek has long-term experience as a manufacturer of pressure-resistant metal bellows according to the PED directive.

As the name suggests, the flexible parts of multilayer metal bellows consist of several thin layers of stainless steel and are designed to withstand axial, lateral and angular movements as well as the desired pressure and process medium. Multi-layered metal bellows can be recognized by the dense wave-like elastic part. At its simplest, a multi-layer bellows is a ”curved tube” equipped with a welding end without a flow plate, flanges and support rods. Our more complex multi-layer bellows solutions are represented by e.g. pressure-balanced metal bellows and, for example, a 6-meter-long FCCU metal bellows equipped with masonry for catalytic cracking.

Single-layer beams made of carbon steel, ”stiffeners”, are often used in angular ductwork of power plants, which only compensate for axial movement. These have the options of a sharp 90° corner, a camera angle or a round corner. Round ducts can also be used with single-layer sheets made of 2-6mm thick sheet, so-called lentil bars.

Filcoflex™ bellows, protective bellows,
PTFE bellows

Innovative Filcoflex™ bellows

For transfer pipelines of powdery substances
food approved (FDA) and ATEX-approved materials (explosion pressure 1.5 Bar
Jacob™ and Tri-Clamp with adapters and locks spare part replacement in minutes!Ks. https://filcoflex.com/news/
silicone and polyurethane bellows for scale applications and weighing
dustproof pneumatic air-filled bellows for filling the big sack (ks. video)

Protective bellows (accordion bellows) for hydraulics and large movements

Of silicone fabrics, rubber, PVC fabrics

Dynatech Haltech protective bellows for all protection needs

Extruded PTFE bellows for strong acids and alkalis

OFFICE
PRODUCTION
WAREHOUSE

Mailing and delivery address:

COMPENTEK OY

Sulantie 22 04300 TUUSULA, FINLAND

+358 (0) 400 300 200

EXPANSION JOINTS

Compentek is NUMBER ONE SOLUTION PROVIDER of EXPANSION JOINTS in Finland

FABRIC EXPANSION JOINTS

RUBBER EXPANSION JOINTS

METAL EXPANSION JOINTS

OTHER BELLOWS

Fabric expansion joints

Rubber bellows

Made-to-order flanged DFS rubber bellows and GNS connectors

D-type storable standard rubber bellows

Metal bellows

Filcoflex™ bellows, protective bellows, PTFE bellows

Innovative Filcoflex™ bellows

Protective bellows (accordion bellows) for hydraulics and large movements

Dynatech Haltech protective bellows for all protection needs

Extruded PTFE bellows for strong acids and alkalis

OFFICE PRODUCTION WAREHOUSE

Mailing and delivery address:

COMPENTEK OY

Sulantie 22 04300 TUUSULA, FINLAND

COMPENTEK OY

Filcoflex™ bellows, protective bellows,
PTFE bellows

OFFICE
PRODUCTION
WAREHOUSE