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About Valve Position Indicators

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Valve position indicators are electrical switching devices that mount directly on a valve actuator, or indirectly on a transfer case. They are used with both rotary actuated valves and linear actuated valves and provide two basic switching options: non-contact and mechanical. Non-contact switches or proximity sensors use inductive or transistor-transistor logic (TTL) and include reed switches. Mechanical switchers are activated by energized arms connected to a moving stem or shaft. Some valve position indicators display information on a rotating dial or sliding scale. Other products feature a light emitting diode (LED) indicator. Valve position indicators with position transmitters are also available. These devices provide continuous, signal-based information about a valve’s open, closed, or intermediate position. 

Valve position indicators differ in terms of the number of indicated positions, the number of switches, and pole and throw specifications. Two-way devices provide a basic on/off indicator. Products with three-way, four-way, 120°, 180°, and continuous indications are also available. There are several different pole and throw categories. Single pole, single throw (SPST) switches make or break the connection of a single conductor in a single branch circuit. Single pole, double throw (SPDT) switches have two terminals and make or break the connection of a single conductor with either of two other single conductors. Double pole, single throw (DPST) switches have four terminals and make or break the connection of two circuit conductors in a single branch circuit. Double pole, double throw (DPDT) switches have six terminals and make or break the connection to two separate circuits.    


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Engineering Web: Valve Position Indicators
Pages: 1 - 5 of 2015231
ASCO Valve - Position Indicators
Position Indicators. Valve Monitoring Systems (VMS) provide valve automation solutions for quarter turn and linear actuator applications.. VR Series - Bracket mounted for quarter turn actuators.. VR2 ...
See ASCO Valve, Inc. Profile & Catalog
Valve Position Indicators
Valve Position Indicators Suppliers.  BROWSE BY CATEGORY > Instrumentation > Position Indicators.  VIEW ALL SUPPLIERS OF Instrumentation > Position Indicators > Valve Position Indicators.  . EMAIL ...
General, Indicators, Position - Product: Valve Position Indicators
Valve Position Indicators under keywords of INSTRUMENTATION & CONTROL Position Indicators General ...
mniguide� to Valve Position Indicators State Selection
Valve Position Indicators in Nevada.  Valve Position Indicators in New Hampshire.  Valve Position Indicators in New Jersey.  Valve Position Indicators in New Mexico.  Valve Position Indicators in New ...
Valve Position Indicators Supplier's Directory from MacRAE'S BLUE BOOK
Displaying 1-24 of 24 “VALVE POSITION INDICATORS”. companies. Related Products.  . INDICATORS: Valve Position.  | . VALVE POSITIONERS.  | . SWITCHES: Valve Position.  | . POSITION INDICATORS: Aircraft ...
See MacRAE'S BLUE BOOK Information

Part Numbers for Valve Position Indicators

Part # Distributor Manufacturer Product Category Description
Model F***-11   Marwin Valve Valve Position Indicators Accurate and versatile indicator, compression seal prevents condensation
Model F***-52   Marwin Valve Valve Position Indicators Accurate and versatile indicator, compression seal prevents condensation
199 190 309   GF Piping Systems Valve Position Indicators Electrical position indicator, for diaphragm valves
199 190 306   GF Piping Systems Valve Position Indicators Electrical position indicator, for diaphragm valves
Model F***-5B   Marwin Valve Valve Position Indicators Accurate and versatile indicator, compression seal prevents condensation

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