Drive energy supply disruption, such that the valve closure member is moved to the fully closed, fully open or remain in the last position, any kind of position are considered to be the protection process required. Fail - safe mode of action may be necessary to connect to the auxiliary actuator control.
Flow characteristics: when the percentage of rated travel from 0 to 100%, the relationship between the flow through the valve and the percentage of rated travel. This term should always be expressed as the inherent flow characteristic or installed flow characteristics.steam solenoid valves
The flow coefficient (Cv value): one relating to the geometry of the valve, for a given stroke constants (Cv value), can be used to measure the flow capacity. It is the pressure drop in pounds per square inch, the number of U.S. gallons per minute flow through the valve 60 ° F water.
High pressure recovery valve: A valve structure, it will be a relatively small number of dispersed fluid energy due to streamlined internal contours and minimal fluid turbulence. Therefore, the reduction in the valve flow cross section downstream pressure will be restored to a very high percentage of the value of the inlet pressure. DC formula valve, such as a rotary ball valve is a typical high-pressure recovery valve.
Inherent die pressure range: atmospheric pressure of the valve body
Pressure acting on the diaphragm to produce rated spool stroke of the high and low pressure. This is usually in the range is the spring setting value range, because when the valve is set in the working range, this range is the range of motion of the valve.
Inherent flow characteristics: a constant pressure drop through the valve with the valve from the closed position to rated travel, the relationship between the flow and closure components trip.mini solenoid valve
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