Bladder Tank - Air in Bladder

Bladder type surge tanks for surge pressure protection of pipelines

Air in Bladder Surge Tank Get a quotation Frequently Asked Questions

Bladder tanks are usually supplied in one of two configurations and are used to reduce pressure surges in pipelines.

The air charge is contained within the bladder inside the tank. The air charge does not come into contact with the liquid in the tank and so cannot be absorbed. Air charge losses due to absorption are therefore not possibel as they have been eliminated. The pumped liquid from the main flows into and out of the main tank, it will come into contact with the tank walls and so compatible materials must be selected.

The bladder is often made from a highly elastic rubber, such as butyl rubber, and may be sized to expand to fit the entire vessel. The bladder will typically be pre-charged at installation with a pre-determined pressure to give the correct operating level in the tank when the unit is connected to the main and at the operating pressure. There must be an anti extrusion plate fixed at the outlet from the vessel to prevent the bladder from being drawn into the main at low pressures. The anti-extrusion plate and inlet size must be selected so that they do not impose a restriction on the flow into and out of the vessel, otherwise the unit will not function correctly as a surge tank.

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Each bladder vessel comes with these standard features:

Safety relief valve

Pressure gauge

Air fill valve

Anti-extrusion plate

Drain connection

Internal bladder (membrane)

Any of our standard bladder vessel may be fitted with the following optional features:

Leak detection system

Level gauge

Level transmitter

Pressure transmitter

Drain valve.

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Flo-Dyne bladder vessels are pressure vessels and as standard may be manufactured in ordinary carbon steel, low temperature carbon steel or 304/316 stainless steel to the requirements of the pressure vessel code of your choice.

Typically this will be ASME VIII or PD5500, however we can also manufacture to IBR or your local requirement. We will CE mark the equipment if it is to be used within the European Union, if the equipment is to be used elsewhere we will apply a CE mark where requested if possible.

Get a quotation Frequently Asked Questions

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Flo-Dyne Controls (UK) Ltd

Flo-Dyne Place, Asheridge Road, Chesham, Bucks, HP5 2PT, UK
Tel: +44 (0) 1494 770088
Fax: +44 (0) 1494 770099
Email @

Contact us from: UK, Europe, Russia, Africa, North America, Central and South America

Flo-Dyne Controls (India) Pvt Ltd

2501, G-Square Business Park, Plot 25&26, Sector 30, Vashi, Navi Mumbai, India
Tel: +91 77-384-97-300
Email @

Contact us from: India, Asia, Middle East, China, Indonesia, Australasia, and New Zealand