DOUBLE RED SP BAND
RUBBER BELLOWS EXPANSION JOINTS
HIGH TEMPERATURE RATING 130 ºC
(265 ºF)
PEEK REINFORCED
The Double Red SP Band expansion joints are low corrugation, highly elastic rubber bellows expansion joints,
characterised by high movement absorption in all directions. The low corrugation achieves low flow resistance, and
the expansion joints reduce up to 70 % of the incoming energy. They are designed to specifically absorb expansion
and vibration, absorb noise and to insulate sound.
The Double Red SP Band are constructed with high temperature corrosion resistant PEEK (or aramid) fabric for
permanent use in heating installations for many years use with hot & high temperature water, cooling water, and hot
air. Temperature range is -40 to +130 ºC (+265 ºF), with brief short term rating up to +150 ºC (+300 ºF).
They meet DIN 4809 specifications, up to 110 ºC (230 ºF) usage.
The Double Red SP Band are used in building technology, plant engineering, water & wastewater works, engine
construction, shipbuilding, HVAC, and petrochemical, industrial and solar & wind energy engineering.
The Double Red SP Band are manufactured within the European Union, and are equivalents to, and interchangeable
with, Elaflex-ERV Rotex Double Red Band, Trelleborg Teguflex C, P & W HP Double Red Band, and Stenflex AS, RS
& VS expansion joints.
Construction :
Liner : EPDM.
Reinforcement : Models 46, 50, 55 & 55SO - High Temperature PEEK
[PolyEther Ether Ketone]
.
Model 52 - High Temperature Aramid.
Cover : EPDM, with Two Red Stripes ;
Resistant to Weather, Aging & Ozone.
Electrically Dissipative Surface Area.
Not Suitable for Potable Water, Oils or Fuels.
Ends :
Flanges are swivel (rotating) both sides, with integral rubber sealing face. Additional gaskets are not required.
Standard drilling is PN10 or PN16. Other drillings to PN6, PN25, PN40, ANSI 150/300, BS10, JIS, TW, TTMA, VG,
SAE3000, or special designs are also available.
Standard material is Carbon Steel S235JRG2 (RSt 37-2), Zinc Plated.
Also available with Hot Dipped Galvanised Carbon Steel, Stainless Steel,
Aluminium, Bronze, or other materials.
Model 46 are supplied with Threaded BSPT Male or BSP Female Ends.
Pressure Ratings :
All Models : DN20 to DN200 : 16 BarG @ 70 ºC 10 BarG @ 100 ºC 8 BarG @ 130 ºC
Models 50 & 55 : DN250 : 16 BarG @ 70 ºC 10 BarG @ 100 ºC 8 BarG @ 130 ºC
Model 50 : DN300 to DN400 : 16 BarG @ 70 ºC 10 BarG @ 100 ºC 8 BarG @ 130 ºC
Model 55 : DN300 to DN400 : 10 BarG @ 70 ºC 10 BarG @ 100 ºC 8 BarG @ 130 ºC
Model 55SO : DN250 & DN300 : 10 BarG @ 70 ºC 10 BarG @ 100 ºC 8 BarG @ 130 ºC
Models 50 & 55 : DN450 to DN1000 : 10 BarG @ 70 ºC 7.5 BarG @ 100 ºC 6 BarG @ 130 ºC
Model 52 : Check with factory.
Model 46
www.interflex.co.uk
Approvals :
Models 46, 50, 55 and 55SO meet DIN 4809 specifications for 10 BarG @ 100 ºC, and 6 BarG @ 110 ºC ; and are
Type Approved by Lloyds Register of Shipping, and DNV (depending on bore size).
Lengths :
Bore DN / NB Lengths (mm)
mm inch
Model
50
Model
55
Model
55SO
Model 46
Female
Model 46
Male
Model
52
20 ¾ 130 125 160 190 214 -
25 1 130 125 160 182 214 -
32 1¼ 130 125 160 190 240 150
40 1½ 130 125 160 198 250 150
50 2 130 125 160 198 260 150
65 2½ 130 125 160 - - 150
80 3 130 150 160 - - 175
100 4 130 150 160 - - 175
125 5 130 150 160 - - 175
150 6 130 150 160 - - 175
200 8 130 175 160 - - 150/200
250 10 130 175 200 - - 150/250
300 12 130 200 200 - - 150/165/175
350 14 200 200 - - - 200
400 16 200 200 - - - 250/300
450 18 200 250 - - - 250
500 20 200 - - - - 250
600 24 200 - - - - 250
700 28 250 260/275 - - - -
800 32 250 250 - - - -
900 36 300 300 - - - -
1000 40 300 300 - - - -
Vacuum Ratings :
Model 46 : Rated for Vacuum.
Models 50, 55, 55SO & 52 :
DN20 to DN50 - Rated for Vacuum.
DN65 to DN250 - Rated for -0.2 BarG Vacuum ;
- For higher vacuum, Internal Vacuum Ring required.
DN300 & Above - Internal Vacuum Ring required.
Other Grades :
If a high temperature rating for other media is required, then other options are available
Model 51 Yellow/Blue for Oils & Fuels rated up to +120 ºC ; Model 51 Lilac for Chemicals rated up to +150 ºC.
Model 52 White/Blue & Double White/Orange - Food Grade approved & rated up to +130 ºC.
Model 39 Lilac rated up to +180 ºC.
Distributor :
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel.: +44 (0)1584 878500 • Email: enquiries@interflex.co.uk
www.interflex.co.uk
