FIELD: solenoid valves.
SUBSTANCE: invention relates to solenoid valves, and in particular to methods and devices for stabilizing the valve positioner during tests of the solenoid valve. A typical device comprises a solenoid valve (202) and a valve positioner (106), connected with the data transmission capability and in hydraulic communication with the solenoid valve. The valve positioner must be set to the pressure control state before testing the solenoid valve. The valve positioner must detect the pressure change at the opposite ends of the solenoid valve caused by the transition of the solenoid valve from the first state to the second state, and switch from the pressure control state to the saturated state after detecting the specified pressure change. The full discharge pressure should stabilize the positioner of the valve conducting the solenoid valve test. The valve positioner must maintain a saturated state until the pressure at the opposite ends of the solenoid valve returns to a pre-determined initial value.
EFFECT: proposed inventions make it possible to test a solenoid valve that controls the activation of an emergency valve by means of a positioner independently of the tests of the emergency valve.
20 cl, 11 dwg
