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Download Wall Mounted Penstocks Spec

Pressures

Having selected the basic frame type it is then necessary to specify one of the Following alternatives:-

A:- Is the gate to take – On-seating head ?
                                          Off seating head ?
                                          On and off –seating head ?
On – seating head – Pressure forcing the door onto the frame.
Off- seating head -  Pressure forcing the door away from the frame.

Modulating penstocks for flow control purposes where gates may be frequently repositioned and utilise only a portion of the full stroke, require special consideration and may necessitate

  • Larger than standard stems

  • Slow operating speeder

  • Continuously rated motors on actuators

  • Special heat absorbing drive shelves