Patent ID: 8960219
Filing Date: 2015-02-24
Classification: F16K,Y10T

Abstract:
1. Actuator for activating opening or closing of a valve, where the actuator is of a type that is normally closed or normally open, and also contains a cylinder and a piston, said piston being held in the normal position in the cylinder by a spring, wherein said spring acting on the piston in the cylinder consists of a closed space with a pressurised fluid, the actuator further comprises at least one top unit with two or more connections for the pressurised fluid, the top unit being rotatably mounted on the cylinder, one of said connections for pressurised fluid in the top unit is connected to the closed space inside said cylinder through an opening of the cylinder and another of said connections for pressurised fluid in the top unit is connected to the closed space inside said cylinder through another opening of said cylinder, the top unit being configured to rotate relative to the cylinder to change a position of the top unit relative to the cylinder to allow the connections to be interchanged.