Cylinder With External Spring

(for 4”, 5” and 6” wedge gate valves)

This cylinder, using the power of the external spring when closing the gate, is very simple in its components and compact. We have recently subjected it to some technical modifications, in order to try to make it increasingly efficient. The stem (in stainless steel) was brought from Ø12 to Ø16 to eliminate the risk of its flexibility when opening and closing the gate valve. The external spring is galvanized with Ø11 steel wire, and the rear galvanized threaded rod continues into the cylinder seat with a chrome rod that prevents bodies from entering the cylinder. These measures, which were made based on our experience in the field, combined with the use of wear-resistant gaskets, make this item very robust and safe over time. It is recommended, for optimal use, to use a minimum of 100-110bar, up to a maximum of 200bar.