About us
Overflow Valves

Overflow Valves

To further protect your tank an overflow valve can be installed. This should not be used as the primary relieving device as it is designed to give a sealing of a liquid overflow stopping vapour emissions or liquid loss until a set point is reached.

It is usually mounted on the same nozzle as the pressure/vacuum vent with the pipework hanging down over the side of the tank but remaining within the bund. The valve should be installed in a horizontal position and the weight allowed to swing freely to give the cover room to open.


Size range 2" (DN50 mm) – 12" (DN300 mm)

Standard body materials – Aluminium, Carbon steel, Stainless steel

Standard trim material – Stainless steel

Diaphragm material - FEP

Body materials – Aluminium, Carbon steel, Stainless steel, Polypropylene

Trim material – Stainless steel, Hastelloy, Polypropylene

Diaphragm material – FEP

Connections to suit your tank typically ANSI/DIN/API

Lightweight design

Nonstandard applications –such as steam jacketed, Derakane coated - please consult us.

Enquire about this product
Overflow Valves

Quick enquiry

Here at Flexachem, we like to talk to our clients. Please provide us with your contact details below and we will contact you.