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

Email:edwardzhao@gbsxj.com

Phone/WeChat/WhatsApp:+8615000725058

Related Products

• Samson Type 3730-2 (PROFIBUS version)
• Samson Type 3730-4 (FOUNDATION Fieldbus)
• Type 3277 pneumatic actuator