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Drainage<br />
Easi-Flow Chamber<br />
P32<br />
The <strong>FP</strong> <strong>McCann</strong> Easi-Flow chamber combines an integral base and side walls<br />
with provision for inlet and outlet connections. It can be used in a number<br />
of applications, including:<br />
• As a silt-trap;<br />
• As a valve chamber; and<br />
• As a flow rate controller (requires installation of a vortex valve unit, sold<br />
separately).<br />
Sizes available<br />
Easi-Flow chambers are available between DN1200 - DN2400.<br />
Flow rate control<br />
<strong>FP</strong> <strong>McCann</strong> can offer supply of a Hydro-Valve vortex flow control device. The<br />
Hydro-Valve is designed to limit storm water outflow to a specific discharge rate.<br />
Sizes are available between 1 – 140 l/s depending on head height. The unit is self<br />
activating with no need for an external power source and comes with a certified<br />
flow rate.<br />
The Hydro-Valve is a device for controlling storm water flow by hydraulic effect<br />
without requiring moving parts. At low flow rates, water entering through the<br />
inlet passes through the vortex chamber to the outlet with no restriction. As<br />
flow rate increases water enters through the inlet with enough energy to create<br />
a vortex in the vortex chamber which results in a considerable pressure drop<br />
between the inlet and the outlet restricting the flow to the allowable discharge.<br />
The Hydro-Valve therefore operates automatically with no moving parts and no<br />
external power source. A typical application of this valve is to control the flow<br />
from storm water attenuation tanks preventing downstream flooding during periods of heavy rainfall.<br />
The Hydro-Valves are custom designed to achieve a specified design flow rate at a given head height.<br />
They are manufactured under an ISO 9001 quality assurance system and are available in sizes compatible<br />
with the <strong>FP</strong> <strong>McCann</strong> Easi-Flow chamber range.<br />
Hydro-Valve - Customised Specification<br />
• No moving parts<br />
• Self activating<br />
• Self cleansing<br />
• Manual by-pass<br />
• Easy installation<br />
• 3-6 times greater orifice CSA<br />
• Hydraulic data available<br />
For more information on Hydro-Valves contact a member of <strong>FP</strong> <strong>McCann</strong> technical sales.<br />
*<strong>FP</strong> <strong>McCann</strong> advise not to complete the manhole construction until the JFC flow control device has been<br />
positioned correctly inside.<br />
32<br />
www.fpmccann.co.uk<br />
precast@fpmccann.co.uk
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