High and low pressure acting on the diaphragm to produce rated spool stroke. Since the force acting on the closure element, the inherent diaphragm pressure ranges may be different from the diaphragm pressure range is installed.
Installed flow characteristic: when the pressure drop through the valve by the process of change for effect, with the valve from the closed position to the relationship between the rated travel, flow and closure components.
Low pressure recovery valve: A valve structure, due to the turbulence generated by the contour of the fluid passage, it is a large part of the fluid energy dispersion. As a result, the contracted flow section downstream of the pressure in the valve is smaller than a valve with a more streamlined channel will be restored to a percentage value of the inlet pressure. Although each valve structure is exactly the same, ordinary straight-through valve is usually low pressure recovery capabilities.high temperature solenoid valve
The modified parabolic flow characteristics: a flow characteristics, which in the low stroke of the closure components, such as the characteristics of the percentage in the high stroke of the closure components linear characteristic.
Push down to close the structure: a straight-through valve structure, the closure element is located between the institutions and seat ring, so that the actuator stem launch of the closure element toward the seat ring, and finally close the valve. The term can also be used in the rotary valve structure. In the rotary valve structure, the linear actuator stem extends the ball or valve plate toward the closed position. Also referred to as a positive role.
Push down on the open structure: a straight-through valve structure. Its seat ring is located between the institutions and closure components, so that the actuator stem launch of the closure element away from the valve seat, opening the valve. The term can also be used in the rotary valve structure. In the rotary valve structure, the linear actuator stem extends to the ball or the valve plate toward the open position. (Also known as reaction).
Adjustable: flow characteristics specified deviation does not exceed the specified limit, the ratio between the maximum flow coefficient (Cv value) and minimum flow coefficient (Cv value). When the flow rate is increased 00 times the minimum flow control, still be able to control valve has a 100:1 rangeability. Rangeability can also be expressed as the maximum and minimum ratio between the flow control.pneumatic hand valve
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