ASCO Solenoid Valves and Samson 3730-3 Electropneumatic HART Valve Positioner Valve Controller

Engineered by SAMSON, the Type 3730-3 electropneumatic positioner integrates a travel sensor, i/p converter, air booster, and microcontroller for high-precision valve control. It compares valve travel/angle to a 4-20 mA signal, outputting pneumatic pressure to actuators. Supports HART for communication and diagnostics, with firmware updates enhancing functionality like automatic option detection and extended configuration periods.

• Control Mechanism: PD controller with A/D conversion for real-time deviation correction.
• Pneumatic Optimization: Volume restriction Q for actuator size adaptation; intermediate flow regulator for stable booster operation.
• Diagnostics Integration: EXPERT+ for predictive maintenance via TROVIS-VIEW or DTM.
• Safety Features: Fail-safe venting via optional solenoid; signal pressure limiting.
• Communication: Serial SSP interface and HART (Rev 5/6) for parameter tuning.
• Customizability: User-defined characteristics (e.g., butterfly/rotary plug valves).
• Hazardous Area Ready: IP 65 rating, multiple explosion protections.

Optimized for industrial control in environments with variable transit times or harsh conditions, including throttling in pipelines and use with external sensors for remote setups. Applicable to IEC 60534-6 linear actuators or VDI/VDE 3845 rotary ones, often in petrochemical or power generation for flow regulation.

1. What causes 'No emergency mode' (Code 76)? Indicates lack of fallback during faults; check firmware and settings.
2. How to perform zero calibration? Access via Code 6 after initialization; tracks calibrations since last init.
3. Can transit times be limited? Yes, via Codes 21/22 up to 240 s to prevent rapid actuator engagement.
4. What if initialization fails? Reset to defaults (Code 36) or check lever/pin position.
5. How to integrate with PLC? Binary inputs per EN 61131-2, P_max=400 mW.

Phone/WeChat/WhatsApp: +8613916209596

Email: svetama@gbsxj.com

• Type 3730-31000000400000009.03: Specific variant with HART.
• TROVIS 3730-3: Upgraded smart positioner.
• Type 3730-4: With PROFIBUS-PA.
• Type 3731-3: For explosive atmospheres.
• Accessories: Type 3710 Reversing Amplifier.