The Masoneilan SVI II AP (Smart Valve Interface, Advanced Performance) from is a high-performance digital valve positioner designed for precise control of pneumatic actuators in industrial processes. This 32-bit microprocessor-based device operates on a two-wire 4-20 mA loop with HART communication, offering bi-directional interaction for setup and diagnostics. Available in standard and high-flow variants (Cv up to 2.2), it supports single-acting actuators and features non-contact position feedback for enhanced reliability. Compliant with SIL 2 standards, it's field-upgradable and suitable for linear or rotary valves, ensuring optimized performance across various actuator sizes while often eliminating the need for additional boosters.
| Parameter | Details |
|---|---|
| Input Signal | 4-20 mA, 450 Ω resistance; min 3.2 mA; power from loop (9 VDC at 20 mA) |
| Pneumatics | Single-acting; supply 20-100 psi (1.4-6.9 bar); connections 1/2" NPT |
| Air Delivery (Single-Acting) | 39 scfm (30 psi), 70.6 scfm (60 psi), 102 scfm (90 psi) |
| Air Consumption | 0.28 scfm (30 psi), 0.35 scfm (45 psi) |
| Travel Range | Linear: 0.25-4" (standard), >4" (extended); Rotary: 18-140° |
| Performance | Accuracy ±0.5% FS; Linearity ±1.0% FS; Hysteresis/Deadband ±0.3% FS; Repeatability ±0.3% FS |
| Ambient Conditions | Temp: -50°C to 85°C; Humidity: 10-95% RH; EMC: EN 61000-4 standards |
| Enclosure | Aluminum ASTM 360; IP66/NEMA 4X; Explosion-proof (ATEX, FM, CSA, IEC) |
| Outputs (Optional) | Position: 4-20 mA (10-24 VDC); Switches: 1A, 30 VDC isolated solid-state |
Ideal for oil & gas, chemical, petrochemical, and power industries where precise valve positioning is critical. Used in surge-control, throttling, and safety applications with linear/rotary valves. Supports Masoneilan and non-Masoneilan actuators, enhancing process control in harsh environments with vibration, corrosion, or extreme temperatures.
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