Auto Tune Digital Valve Positioner Masoneilan SVI2 AP Diagnostics 4-20mA Non-contact Position Sensing Valve Positioner
Masoneilan SVI2 (SVI II AP) Digital Valve Positioner
The Masoneilan SVI II AP is an advanced digital valve controller that delivers high-performance positioning for pneumatic control valves. It operates on a two-wire 4-20 mA signal with bi-directional HART communication and incorporates a field-proven non-contact position sensor for reliable feedback.
Product Overview Designed for universal application, the SVI II AP supports both linear and rotary valves as well as single-acting and double-acting actuators. The local explosion-proof LCD and pushbuttons allow configuration and calibration even in certified hazardous environments. Auto-commissioning functions and modular construction simplify installation and future upgrades. Real-time diagnostics, including pressure sensing and valve signature analysis, help monitor valve and actuator health. High-flow versions are available to handle larger actuators without additional accessories.
Technical Specifications
| Specification | Details |
|---|---|
| Product | SVI II AP Digital Valve Positioner |
| Communication | HART 5 or 7 over 4-20 mA |
| Position Feedback | Non-contact Hall sensor (local or remote mount option) |
| Action | Single or double acting |
| Travel Capability | Linear: from 0.25" standard; Rotary: 18°–140° |
| Accuracy | ±0.5% full span |
| Linearity | ±1.0% full span |
| Temperature Range | -50°C to +85°C |
| Enclosure Rating | IP66 / NEMA 4X |
| Air Supply | Up to 100 psi (single-acting) / 150 psi (double-acting) |
| Optional Outputs | 4-20 mA position transmitter, solid-state switches |
| Diagnostics | Offline signatures, online friction, cycle counting |
| Safety Compliance | SIL 2 (IEC 61508) |
Application Industry Widely applied in process control environments such as chemical plants, petrochemical facilities, power stations, and oil & gas installations requiring accurate and diagnostic-capable valve positioning.
Common Problems Typical issues with conventional positioners include mechanical sensor wear, difficult hazardous-area operation, and limited diagnostic data. The SVI II AP reduces these concerns through sealed non-contact sensing, certified local interface, and advanced diagnostic capabilities accessible via HART or ValVue software.
Replacement Models An effective modern replacement for legacy Masoneilan SVI II or earlier digital/analog positioners, as well as competitive single- and double-acting digital positioners.
Why Buy From Us We provide authentic Masoneilan SVI II AP controllers and support customers with technical guidance for successful integration into existing control systems.
Stock & Delivery Time Standard lead time is 6-8 weeks.
RFQ Form Submit details on your valve and actuator, preferred configuration options, certification requirements, and quantity to receive a detailed quote.
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