Abstract

A penstock that may be made from cast iron includes resilient sealing faces (7, 8) at different angles. Each sealing face is formed by pouring a liquid into a recess within the penstock frame (1). The liquid, e.g. a two-part epoxy, cures so that surface of the liquid forms a flat, tough, resilient sealing face, the frame (1) being re-oriented between formation of the first and second faces (7, 8). The penstock may also include a door (2) with angled faces that create a wedge within the frame (1). The angled face on the back of the door (2) mates with an angled resilient sealing face (7) within the frame (1). The angled face on the front of the door (2) engages with adjusting screws (4) positioned within the frame (1) to urge the mating surfaces into engagement. The bottom face of the door (2), which is perpendicular to the sides, mates with a second resilient sealing face (8) formed in the bottom of the frame (1).

IPC Classes  ?

• E02B 7/54 - Sealings for gates
• E02B 7/28 - Vertical-lift gates with sliding gates
• F16K 3/14 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor with wedge-shaped arrangements of sealing faces with special arrangements for separating the sealing faces or for pressing them together
• F16J 15/14 - Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid