Patent ID: 9671036
Date: 2017-06-06
CPC Classifications: F16K

Claim:
1. An actuator for a valve, comprising: a first piston comprising a first piston rod, a first fluid chamber for the first piston, for enabling movement of the first piston and the first piston rod when fluid is introduced into the first fluid chamber, a second piston comprising a second piston rod, the second piston rod being coaxially arranged with the first piston rod and radially enclosing at least a part of the first piston rod, a second fluid chamber for the second piston, for enabling movement of the second piston and the second piston rod when fluid is introduced into the second fluid chamber, a first fluid channel in communication with each of the first and the second fluid chambers, for effecting, when fluid is introduced into the first fluid channel and thereby also introduced into the first and the second fluid chambers, movement of the first piston and movement of the second piston, and the first fluid chamber being defined by the first piston and a driver, the driver being slidably arranged in a housing of the actuator.