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JP03 Untied Rubber Bellows


Untied E.P.D.M. rubber bellows with synthetic fibre 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 reduce noise and vibration imposed on pipework from pumps and reciprocating machinery. They are suitable for L.T.H.W. & C.H.W applications (please see the Stourflex chemical compatibility chart for a full list of suitable flow media).

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

Maximum Pressure & Temperatures

32mm – 300mm350mm – 600mm
Up to 90°c6 Bar6 Bar
Up to 82°c10 Bar6 Bar
Up to 70°c16 Bar6 Bar
Chilled16 Bar6 Bar


Stourflex are now able to offer a tailor made flexible lagging jacket to help reduce heat gains & condensation on CHW systems. Please ask for more information.
* We would not recommend the insulation of rubber bellows being used on hot water or heating applications as this can drastically reduce the life expectancy of the bellows leading to premature failure.

Please ask for pricing or more information!

Download data sheet
JP01 rubber bellows

our technical specifications

Our JP03 Untied Rubber Bellows specifications

Part numberN.B. (mm)Installed Lengths (mm)Compression (mm)Extension (mm)Lateral (mm)Angular (mm)
JP03-32-163295 / 1509 / 206 / 129 / 1415°
JP03-40-164095 / 15010 / 206 / 129 / 1415°
JP03-50-1650105 / 15010 / 207 / 1210 / 1415°
JP03-65-1665115 / 15013 / 207 / 1211 / 1415°
JP03-125-16125150 / 17019 / 2012 / 1213 / 1415°
JP03-150-16150150 / 18020 / 2012 / 1213 / 1415°
JP03-200-16200150 / 20525 / 2512 / 1614 / 2215°

Supplied length may vary. Tolerance +/-5%

Alternative flange drillings and materials 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.

Download data sheet