Description: Manual lever models are operated with a handle that shifts the spool. The standard handle position of the knob for a 3-position valve is the center of the valve (Position "B"). To fully shift the valve, the handle is pulled towards the operator . Actuation: Manual …
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Positioners essentially act as control systems within themselves: the valve’s stem position is the process variable (PV), the command signal to the positioner is the setpoint (SP), and the positioner’s signal to the valve …
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Valve Related Controls (VRC) is a manufacturer of pneumatic & electro-pneumatic valve positioners with environmentally sealed modular options such as: I/P transducer, limit switches & transmitters. We offer a complete line of positioners used for pneumatic actuator & valve …
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NOTE: When retrofitting the Beta Positioner to an actuator equipped with a Moore or comparable positioner, remove the existing positioner, bracket, stem clamp, and associated bolting. If retrofitting to an actuator equipped with a Valtek Beta pneumatic, system 80, or XL positioner…
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Masoneilan models 4700E/4800E (electropneumatic) and 4700P/4800P (pneumatic) are field-proven positioners from GE Oil & Gas that use a precision feedback cam to provide accurate positioning, fast response, and customized control characteristics for control valves. These positioners …
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Smart Valve Positioner 300 Series / 200 Series HART + Travel Transmission Model AVP307(Integral Type) AVP207(Remote Type) User's Manual AVP307, AVP207 CM2-AVP307-2001
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Series 760 valve positioners include provisions for internal limit switch mounting and position feedback devices without requiring additional housings. Thus, the need to stack housings that impede access to the main enclosure are eliminated. A spool valve is used to load the actuator for positioning …
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Manual - Modular Valve Positioner (RS-232) This operators manual for the Serial MVP covers installation, care, and RS-232 communication. Hamilton offers a variety of different fluid path to meet …
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Every control valve positioner must be equipped with some means to sense the position of the valve’s stem, otherwise the positioner could not compare the valve stem’s position against the command signal.
The Series 760 Valve Positioners provide a cost effective universal approach to your valve control. Their modular concept allows all models to be built on the base pneumatic unit (Model 760P).
Electronic valve positioners, such as the Fisher model DVC6000, use an electronic sensor to detect valve stem position, a microprocessor to compare that sensed stem position against the control signal by mathematical subtraction (error = position signal), then a pneumatic signal converter and relay (s) to send air pressure to the valve actuator.
In all cases, including bottom-loading applications, a Model 73 Built-In Pneumatic Valve Positioner is mounted directly on the topwork of the valve, with no external levers or other exposed mechanisms .