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Masoneilan SV II AP Advanced Performance Digital Valve Positioner SVI2-21123111
Product Overview
32-bit microprocessor-based digital valve positioner with HART 5/7 protocol over 4-20mA signal, delivering high-precision pneumatic actuator control and real-time online diagnostics.
Features non-contact through-housing position sensing and built-in LCD pushbutton interface, supporting safe local configuration in certified hazardous areas without removing the enclosure.
Universal modular design compatible with both Masoneilan and third-party single-acting linear/rotary valves, serving as a direct drop-in replacement for traditional analog positioners.
Technical Specifications
Parameter
Specification
Input Signal
4-20mA with HART 5/7 bidirectional communication
Supply Pressure
20 – 150 psi (1.4 – 10.3 bar)
Operating Temperature
-50°C to +85°C
Pneumatic Action
Single-acting, fail-safe
Application Industry
Oil & Gas / Petrochemical: Suitable for wellhead control, pipeline transmission and refining processes in explosive hazardous zones.
Power Generation: Delivers stable flow regulation for boiler feed water, steam circulation and cooling water systems in thermal/nuclear power plants.
Chemical & Pharmaceutical: Supports precise process control for corrosive media, batch production and strict safety-compliant manufacturing lines.
Common Problems & Solutions
Valve position drift / calibration inaccuracy: Run auto-tune and auto-stop calibration via local LCD or HART host; verify stable supply air pressure.
Slow response / blocked air vent: Clean the exhaust port to remove dust and condensate; inspect the air filter regulator for clogging.
HART communication failure: Check 4-20mA loop wiring and power supply; confirm device address and cable shielding integrity.
Replacement Models
SVI2-21123121: Same base configuration with additional valve position feedback signal output.
SVI2-22123111: Double-acting pneumatic version with LCD display, for dual-acting actuators.
SVI3 AP: Next-generation upgraded model with enhanced advanced diagnostics and wider environmental adaptability.
Why Buy From Us
100% original authentic Masoneilan products with full factory traceability and quality assurance.
Professional technical team with 10+ years of industrial valve experience, providing free selection and commissioning guidance.
Flexible bulk pricing and dedicated after-sales support, minimizing downtime for your on-site projects.
Stock & Delivery Time
Sufficient ready stock of SVI2-21123111 in local warehouse, available for immediate dispatch upon order confirmation.
Standard delivery: 3–5 working days for domestic orders; 7–15 working days for international express (DHL/FedEx/UPS).
Customized export packaging (carton/wooden case) provided, with full set of shipping documents including commercial invoice and packing list.
