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The positioner ensures a predetermined assignment of the valve (controlled variable x) to the input signal (reference variable w). It compares the input signal received from a control system to the travel or rotational angle of the control valve and issues a corresponding output signal pressure (output variable y).
Special features
•• Simple direct attachment to SAMSON Type 3277 Actuator (120 to 700 cm², see Fig. 1)
•• Attachment according to IEC 60534-6 (NAMUR)
•• Attachment to rotary actuators according to VDI/VDE 3845 (see Fig. 3)
•• Attachment to Type 3372 Actuator for Series V2001 Valves (see Fig. 2)
•• 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 EEPROM (protected against power failure)
•• Two-wire system with a small electrical load of 300 Ω
•• Activatable tight-closing function
•• Continuous monitoring of zero point
•• Non-contact position sensing
•• Unaffected by environmental effects and steam hammering
Version
- Electropneumatic postioner with local operation and LCD
- Type 3725-000, without explosion protection
- Type 3725-110, explosion protection according to ATEX
- Type 3725-113, explosion protection according to GOST
- Type 3725-130, explosion protection according to CSA
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