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JP05 Untied Rubber Bellows

Now Available With Precision Fit Flexible Lagging Jackets To Suit JP05.


Untied E.P.D.M. rubber bellows with high tensile cord reinforced body and steel reinforced collar. Fitted with zinc plated carbon steel swivel flanges. Drilled to BS. 4504 NP16.


Stourflex untied rubber bellows are designed to accommodate misalignment and both axial and lateral movement. They are also used to reduce noise and vibration from pumps and reciprocating machinery. The high tensile cord reinforced body allows the JP05 to be used on heating systems and engine cooling applications or where extended service life is required.


Stourflex are now able to offer a tailor made flexible lagging jacket to help reduce heat losses on LTHW systems and heat gains & condensation on CHW systems. Please ask for more information.

  • Maximum working temperature 105ºC.
  • (Intermittent peaks up to 120°C)
  • Maximum working pressure 16 Bar.
  • Maximum working pressure at 105°C = 6 Bar.
  • Maximum working pressure at 90°C = 10 Bar.

Stourflex rubber bellows should not be used at both their maximum working temperature and pressure respectively.

Maximum test pressure = 1.5 x working pressure or 1.5 x flange rating, whichever the lower.

Download data sheet
JP05 rubber bellows

our technical specifications

Our JP05 Untied Rubber Bellows specifications

Part NumberN.B. (mm)Installed Length (mm)Compression (mm)Extension (mm)Lateral (mm)AngularWorking Pressure Up To 60°Vacuum without support ring (mm Hg)Vacuum with support ring (mm Hg)

Supplied length may vary. Tolerance +/-5%

The movements stated above have been reduced to cater for high temperature applications.

Where vacuum conditions or pressures and temperatures above those stated exist, please check with us the suitability of and effects on the service life of Stourflex products. Vacuum support ring fitted upon request.

Details on larger sizes and alternative flange specifications are available on request.

Stourflex products should be installed in accordance with our fitting instructions. Stourflex rubber bellows should be periodically inspected and replaced if any deterioration is evident.

The JP05 rubber bellows are produced within the E.E.C and are stamped with date of manufacture. The JP05 conforms with and is certified to DIN 4809.

Download data sheet