Flow Over Weir or Open Channel Apparatus

A 'WEIR' is the name given to concrete or masonry structure built across a river (or stream) in order to raise the level of water on the upstream side and to allow the excess water to flow over its entire length to the downstream side. Weirs may also be used for measuring the rate of flow of water in river or streams. Different shapes of "Weirs" generally used are sharp-crested weir, broadcasted weir and ogee shaped weir. In the unit a centrifugal pump sucks the water from the sump tank, ond discharges it to a small flow channel, The weir is fitted at the end of channel. All the weirs are interchangeable. The water-flowing over the weir falls In the collector. Water coming from the collector can be directed to the sump or can be directed in to the measuring tank for measurement of flow.

Metallic structure and supports in painted steel. Main metallic elements in stainless steel Channel of rectangular section with transparent walls.

There are several channel versions to chose:

• Flow Channel (section: 300 x 450mm), length: 5 m.
• The channel is assembled on supports, with a system to control the inclination of the channel.
• Storage tanks. (Number of tanks in function of the Channel version). Capacity of each tank: 400l. approx
• Impulsion pump, with variable speed. (Power of the pump in function of the Channel version).
• Inlet tank, with drain valve.
• Reception tank, with drain valve.
• Flow control valves.
• Pipes.
• Flow measurement system.
• Cables and Accessories, for normal operation