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This combination pairs the Samson 3730 series electropneumatic positioner with an Amot thermostatic 3-way mixing/diverting valve. The Samson 3730 provides precise pneumatic actuator control via 4-20 mA input, while the Amot valve automatically regulates temperature by mixing hot and cold fluids (or diverting flow) using a self-contained wax-filled thermal element. It is a classic, reliable setup for temperature control loops that need both accurate valve positioning and fail-safe thermal protection.
Features
Samson 3730: HART communication, auto-calibration, local display
Amot valve: fully self-acting (no external power needed)
Fast response to temperature changes
Fail-safe thermal actuator (wax element)
Robust for industrial environments
Easy integration – positioner mounts directly on actuator
Technical Specifications
Samson 3730 Positioner
Input: 4–20 mA DC
Supply Air: 1.4–7 bar
Ambient Temperature: –20 to +80 °C (standard)
Protection: IP66
Communication: HART
Amot Thermostatic 3-Way Valve (typical models e.g. AMOT 3-way)
Temperature Range: Model-dependent (common 18–113 °C)
Setpoint Accuracy: ±2–3 °C
Pressure Rating: Up to 10–16 bar (model-dependent)
Body Material: Cast iron, bronze, stainless steel
Connections: Flanged or threaded
Applications
Engine jacket water temperature control
Lube oil cooling systems
Heat exchanger bypass regulation
Industrial process temperature mixing/diverting
Compressor aftercooler control
FAQ
Q: Does the Amot valve need power?
A: No – it is fully self-acting using wax thermal element.
Q: Can the Samson 3730 control the Amot valve?
A: No – Amot is self-acting. The combination usually means Samson controls a separate control valve in the same loop or system.