SERECO penstocks are mainly composed of:
- a welded metal door suitably shaped and stiffened;
- a gasket with hollow music note shape, fixed on the door to guarantee the seal on the four sides. The standard construction is in EPDM elastomer; different materials are possible on demand;
- sturdy frame that allows the fixing by anchors. The seal of the penstocks is guaranteed in both directions and it is achieved by wedges and/or a system of wheels and guides that compress the music note shape gasket of the door against the sealing surface of the frame;
- maneuvering column fixed to wall or floor suitable to carry the weight of the entire driving system;
- control rod composed by TPN screw that connects the door to the driving system by transmitting the necessary force for the tightening or the lifting of the door. The standard construction is rising screw;
- driving system which can be manual by handwheel or handwheel with gearbox or electric actuator and emergency handwheel on board of the actuator. The standard version of the actuator is with ON/OFF signal, for opening/closing service. On demand it is possible to equip the penstocks PV4A model with modulating service electric actuators by analog signal 4÷20 mA.
The penstocks are manufactured according to standards ANSI/AWWA C560-00, C540-02, C561-04 and C513-05 and the thickness of all the components of door and frame are not less than 8 mm.
The dimensional and constructional characteristics vary according to the dimensions of the openings and the head and they can be grouped, as already indicated, in a maximum of 5 series: S, L, M, P and PT.
The selection of the series according to the specific application is at SERECO’s care.
The client may carry out a general selection by looking at diagrams "unseating head" and "seating head".
Penstocks can be realized with materials and surface treatments suitable to the most various types of fluid to intercept. The most common solutions are in carbon steel hot dip galvanized, epoxy painted, stainless steel in its various types or aluminum. On demand other types of materials are possible.
