USAGE AREAS : Channel Type Penstocks are also used to control the flowrate in a channel as the name indicates. STANDARTS : Like Wall mounted penstocks, these are also manufacture according to either AWWA C560, BS 7775 or DIN EN 19569. MATERIAL OF TYPE : Manual and automatic control is available upon request and can be manufactured from Aluminum, Epoxy coated or galvanized steel or stainless steel.