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JP01 Untied Rubber Bellows


Untied E.P.D.M. rubber bellows with nylon 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. They are suitable for L.T.H.W. systems up to 90°C with a maximum working pressure 10 bar and C.H.W. systems at 6°C/12°C with maximum working pressure of 16 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.


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.

Download data sheet
JP01 rubber bellows

our technical specifications

Our JP01 Untied Rubber Bellows specifications

Part NumberN.B (mm)Installed Length (mm)Compression (mm)Extension (mm)Lateral (mm)Angular
JP01-25-16 251301391315°
JP01-80-16 801301391315°
JP01-100-16 1001301391315°
JP01-125-16 1251301391315°
JP01-150-16 1501301391315°
JP01-200-16 2001301391315°
JP01-250-16 2501301391315°
JP01-300-16 3001301391315°

Supplied length may vary. Tolerance +/-5%

For sizes above 300mm N.B. please refer to the JP03 untied rubber bellows.

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