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Samson 3725 Electric Valve Positioner

Samson 3725 electric valve positioner uses a polyphthalamide shell, it is a linear actuator product conforming to IEC 60534-6 or SAMSON one-piece accessory. All parameters of the Samson 3725 electric valve positioner are stored in non-volatile EEPROM. Samson 3725 electric valve positioner has an automatic zero-point monitoring function and non-contact position sensing function.

Product Features

Samson 3725 electric valve positioner uses a polyphthalamide shell, it is a linear actuator product conforming to IEC 60534-6 or SAMSON one-piece accessory. All parameters of the Samson 3725 electric valve positioner are stored in non-volatile EEPROM. Samson 3725 electric valve positioner has an automatic zero-point monitoring function and non-contact position sensing function.

The Type 3725 Electropneumatic Positioner is mounted on pneumatic control valves and is used to assign the valve position to the control signal. The positioner compares the electric control signal of a control system to the travel or opening angle of the control valve and issues a signal pressure for the pneumatic actuator. The positioner ensures a predetermined assignment of the valve position to the input signal. It compares the input signal received from a control system to the travel or rotational angle of the valve and issues a corresponding output signal pressure.

Samson 3725 electric valve positioner

• Simple direct attachment to SAMSON Type 3277 Actuator (120 to 700 cm²)
• Attachment according to IEC 60534-6-1 (NAMUR)
• Attachment to rotary actuators according to VDI/VDE 3845
• Attachment to Type 3372 Actuator for Series V2001 Valves
• Easy operation with intuitive navigation menu using three capacitive keys
• LCD easy to read in any mounted position due to selectable reading direction
• Variable, automatic start-up
• Preset parameters (only values deviating from the standard need to be adjusted)
• Permanent storage of all parameters in non-volatile memory (EEPROM)
• Tight-closing function can be activated
• Continuous monitoring of zero point
• Non-contact position sensing
• Unaffected by environmental effects and steam hammering

Product Parameters

Product name Samson 3725 electric valve positioner
Usage Throttle service
Annex Linear actuator, single acting

Linear actuator, double acting

Rotary actuator, single acting

Rotary actuator, double acting

Explosion proof Type of protection “intrinsically safe”

No certification

Communication Not needed
Control loop 4 to 20 mA
Optional solenoid valve Not needed
Valve diagnosis Not needed
Minimum current 3.8 mA
Load impedance Max. 6.3 V (corresponds to 315 Ω at 20 mA)
Direction of action w/x reversible

Application and After-Sales Service

The main application areas of valve positioners include:
1. Coal gasification project
2. Clean energy gasification unit
3. Electricity
4. Hydrocarbons
5. Water supply and water treatment
6.Pulp and paper
7.Industrial environment
8. Food and beverage
9. Life sciences and other fields

After-sales service

Online support and Video technical support.

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