Masoneilan SVI3 Digital Valve Positioner HART Advanced Diagnostics SmartRecovery High Accuracy Control
The Masoneilan SVI3 is a high-performance, HART 7 digital valve positioner designed for precise control of pneumatic control valves in demanding industrial environments. It combines non-contact magnetic (Hall-effect) position sensing, advanced autotuning, extensive diagnostics (including Online Valve Diagnostics and SmartRecovery), and optional local LCD/pushbutton interface. Suitable for both rotary and reciprocating valves, air-to-open or air-to-close actuators, it supports single-acting operation with robust aluminum or 316L stainless-steel housing rated IP66 / NEMA 4X.
- Non-contact Hall-effect position sensing (no shaft penetration, sealed electronics)
- Extreme accuracy (±0.5% full span) with autotuning and user-adjustable response
- SmartRecovery mode – pressure-based control when position feedback fails
- Online Valve Diagnostics with 1-year onboard KPI storage (friction, stick-slip, obstruction, cycling, RMS error, etc.)
- Optional LCD + four pushbuttons for local configuration/calibration
- Options board: position retransmit (4-20 mA), digital input/output switches, remote position sensor, PV input
- HART 7 communication; full DTM and EDD support
- Tight shut-off, split-range, custom characterization, high/low position limits
- Hazardous-area approvals (ATEX, IECEx, USA, Canada, etc.)
| Parameter | Specification |
|---|---|
| Accuracy | ±0.5% full span |
| Hysteresis + Deadband | ±0.3% full span |
| Repeatability | ±0.3% full span |
| Operating Temperature | Standard: –40 °C to +85 °C; Extreme: –55 °C to +85 °C |
| Supply Pressure | 20–120 psi (1.4–8.3 bar) |
| Air Delivery (single-acting) | 410 SLPM (14.5 SCFM) @ 30 psi |
| Air Consumption | ≈2.8–3.4 SLPM @ 30–45 psi |
| Input Signal | 4–20 mA, loop-powered; compliance 9 V @ 20 mA |
| Position Travel | Rotary 18–140°; Reciprocating 0.25–8 in (6–203 mm) |
| Housing | Aluminum or 316L SS; IP66 / NEMA 4X |
| Weight (standard flow) | Aluminum ≈3.3 kg; SS ≈6.3 kg |
| Communication | HART 7 |
| MTBF | 49 years |
Oil & gas, refining, petrochemical, power generation, chemical processing, marine, and any process requiring high reliability, diagnostics, and precise valve positioning under harsh conditions (including natural-gas service with ≤20 ppm H₂S).
Does it support double-acting actuators?
Standard models are single-acting; double-acting variants exist.
Can it run without a local display?
Yes – full remote operation via HART/DTM.
What is SmartRecovery?
A pressure-inferred control mode that keeps the process running when position sensing fails.
Is Online Valve Diagnostics standard?
Available on Advanced and Online Valve Diagnostics versions.
- ValVue3 + SVI3 DTM software
- SVI3 Options Board
- previous-generation SVI II / SVI FF positioners
- Masoneilan control valves (Camflex, 87/88 actuators, LincolnLog, etc.)
- HART handheld communicators
- exhaust-routing manifolds
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