Valve position transmitter

阀位变送器 is a device that converts the angle or position of a valve or other mechanical device into a 4-20mA current signal.
Valve position transmitter is a device that converts valve opening position signals into standard electrical signals (such as 4-20mA), mainly used for remote monitoring and control of valve status
Its core functions include:
Signal conversion: detect valve angle/linear displacement through displacement sensors (such as LVDT) or mechanical structures
Standard output: Convert physical quantities into industrial universal 4-20mA signals, compatible with PLC/DCS systems
On site display: Some models are equipped with visual indicators (such as red/yellow domes) for on-site debugging
The following is a detailed technical analysis and product information about valve position transmitters, compiled from multiple trusted sources:
1. Core functions and working principles
Function: Real time monitoring of valve opening position, converting mechanical displacement into standard electrical signals (such as 4-20mA) and outputting them to the control system.
Typical model:
PTS420 series: Dual line circuit design, with a range covering 0.25 inches to 10 inches and an accuracy of 0.75%, suitable for scenarios such as steel rolling mills and water gate control.
WESTLOCK 2004SFC2A2M04CSU: Industrial grade valve position indicator, compatible with PLC systems.
2. Technical parameters and selection points
Power supply: 10.5V~28VDC (such as PTS420 power consumption of 6mA).
Signal output: 4-20mA two-wire system, strong anti-interference ability.
Environmental adaptability: Working temperature -25 ℃~85 ℃, splash proof shell design.
Calibration function: Supports manual calibration of zero position and full degree, with calibration certificate attached.
3. Application scenarios
Industrial control: Position feedback of pneumatic/hydraulic valves (such as in the chemical and power industries).
Water treatment: Monitor gate height or weir opening.
Metallurgical equipment: Roll gap control.
4. Supporting equipment and extended functions
Valve group integration: Three valve group/five valve group can be linked with differential pressure transmitter to achieve pressure balance and discharge.
Intelligent instrument: such as the Huibang HB-ND835 handheld controller, supporting light column display and remote operation.

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