Samson 4708 Air Filter Regulator 3730-3 3730-5 3731-3 Digital Electropneumatic Valve Positioner Control Valve
Samson Type 3730-3 Electropneumatic Positioner – The Reliable HART Positioner for General Use
Product Overview The Samson Type 3730-3 is a single-acting electropneumatic positioner with HART communication for mounting on pneumatic linear and rotary actuators. It's a straightforward, self-calibrating unit that automatically adapts to the valve and actuator. Many plants choose it for standard control loops because it's easy to operate, has a clear display, and works reliably in challenging ambient conditions.
Features
- Self-calibrating with automatic adaptation to valve and actuator
- Intuitive menu navigation using rotary pushbutton and alphanumeric LCD
- HART communication for configuration and monitoring
- Tight-closing function can be activated
- Non-contact travel sensor system
- Unaffected by environmental effects and steam hammering
- Low air consumption in steady state
- Exhaust air with pneumatic connection option
Technical Specifications
- Reference variable w: Signal range 4 to 20 mA, two-wire device, reverse polarity protection, min. span 4 mA
- Minimum current: 3.6 mA for display, 3.8 mA for operation
- Load impedance: ≤ 8.2 V (corresponding to 410 Ω at 20 mA)
- Supply air: 1.4 to 7 bar (20 to 105 psi)
- Air quality: acc. to ISO 8573-1, max. particle size and density Class 4, oil content Class 3, pressure dew point Class 3 or 10 K below ambient
- Hysteresis: ≤ 0.3 %
- Sensitivity: ≤ 0.1 %
- Air output capacity (Δp = 6 bar): Actuator supply 8.5 m³/h, exhaust 14.0 m³/h
- Permissible ambient temperature: –20 to +80 °C (all versions), –45 to +80 °C with metal cable gland
- Degree of protection: IP66
- Housing material: Aluminum or stainless steel 1.4581
- Weight: Approx. 1.0 kg (aluminum)
Applications
- Attachment to pneumatic control valves (linear or rotary)
- Challenging ambient conditions
- Throttling service
- Use with external travel sensor
- General industrial process control
FAQ Q: Does it auto-calibrate? A: Yes – self-calibrating with automatic adaptation to valve and actuator.
Q: What communication does it use? A: HART communication.
Contact Us
Phone/WeChat/WhatsApp:+8615000725058
Related Products
- Samson Type 3730-2 (PROFIBUS version)
- Samson Type 3730-4 (FOUNDATION Fieldbus)
- Type 3277 pneumatic actuator
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