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JP05 Untied Rubber Bellows

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


Untied WILLBRANDT E.P.D.M. rubber bellows with PEEK reinforced body and collar. Fitted with galvanised 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. The PEEK reinforced body allows the JP05 to be used on heating systems and cooling applications or where extended service life or higher operating temperatures are required.

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

Maximum Pressure & Temperature

Up To 110°C6 Bar
Up To 100°C8 Bar
Up To 70°C16 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.

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 70°Vacuum Support Ring
JP05-65-166513030301030°16Support Ring Required Below -300mbar
JP05-80-168013030301030°16Support Ring Required Below -300mbar
JP05-100-1610013030301020°16Support Ring Required Below -300mbar
JP05-125-1612513030301020°16Support Ring Required Below -300mbar
JP05-150-1615013030301020°16Support Ring Required Below -300mbar
JP05-200-1620013030301012°16Support Ring Required Below -300mbar
JP05-250-1625013030301012°16Support Ring Required Below -300mbar
JP05-300-1630013030301012°16Support Ring Required

Supplied length may vary. Tolerance +/-5%

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 rubber bellows should be regularly inspected as part of normal system maintenance and replaced immediately if any deterioration is evident. For more information, please contact Stourflex about a site survey.

The JP05 rubber bellows are produced within the E.E.C and are stamped with date of manufacture.

Download data sheet