This is a complete "how-to" for installing the Samson 3277 actuator on top of a Samson 3241 globe control valve.
The Samson types 3271 and 3277 pneumatic actuators contain a rolling diaphragm and internal springs.
Special features
• Low overall height
• Powerful thrust at high response speed
• Low friction
• Various bench ranges by varying the number of springs or their compression
• No special tools required to change the bench range and to reverse the actuator action (also version with hand-wheel)
• Permissible operating temperatures from –50 to +120 °C
• Direct attachment of accessories on additional yoke for
• Type 3277 with concealed travel pick-off
Samson 3241 Globe Control Valve
The control valves consist of a body with trim, bonnet and pneumatic actuator, optionally with metal bellows or insulating extension. The valves may be also equipped with electric, electro-hydraulic, or hand-operated actuators, as well as control accessories and other instrumentation.
Demanding applications and problem-solving uses for industrial ball valves, gate valves, globe valves, high performance butterfly valves, knife gate valves, pneumatic actuators, electric actuators, limit switches and positioners. Courtesy of Rencor Controls - (800) 777-4174
Monday, October 6, 2014
The Samson 3730-3 Valve Positioner: Description, Resetting to Factory Default and Performing Auto-Calibration
Samson 3730 |
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 control valve and issues a corresponding output signal pressure.
Special Features
- Simple attachment to all common linear and rotary actuators with interface for SAMSON direct attachment, NAMUR rib, valves with rod-type yokes according to IEC 60534-6-1 or to rotary actuators according to VDI/ VDE 3845.
- Any desired mounting position of the positioner.
- Simple single-knob, menu-driven operation
- LCD easy to read in any mounted position due to selectable reading direction.
- Configurable with a PC over the SSP interface using the TROVIS-VIEW software.
- Variable, automatic start-up with four different initialization modes.
- Preset parameters – only values deviating from the standard need to be adjusted.
- Calibrated travel sensor without gears susceptible to wear.
- Sub initialization mode (substitution) allows the positioner to be started up in case of emergency whilst the plant is running without the valve moving through the whole travel range.
- Permanent storage of all parameters in EEPROM (protect- ed against power failure).
- Two-wire system with small electrical load between 300 and 350 Ω depending on version.
- Adjustable output pressure limitation.
- Tight-closing function.
- Continuous monitoring of zero point .
- Integrated temperature sensor and operating hours counter.
- Two standard programmable position alarms.
- Self-diagnostics; alarms as condensed state conforming to NAMUR Recommendation NE 107, issued over a fault alarm contact or optional analog position transmitter .
- Integrated EXPERTplus diagnostics (u T 8389 EN) suitable for throttling and on/off valves and with additional partial stroke test for valves in safety-instrumented systems.
Here is a video that explains how to reset the Samson 3730-3 back to factory default settings and then perform and auto-calibration.
Labels:
3730,
control valves,
positioner,
samson controls
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