Dresser Masoneilan SVI II Smart Valve Interface – Model SVI2-21123121

The Dresser Masoneilan SVI II (Smart Valve Interface II) model SVI2-21123121 is a high-performance digital valve positioner engineered for precision valve control in hazardous and industrial process environments. Featuring an IP66 / Type 4X enclosure, the device is ATEX certified with flameproof and intrinsically safe protection (Ex d [ia] IIC T6), suitable for Class I, II, and III Div 1 hazardous areas. Designed for reliability in extreme operating temperatures ranging from -40°C to +85°C, the SVI II offers continuous monitoring of valve performance, including cycle counts and travel statistics, as well as both online and offline diagnostics such as step response tests and friction analysis. Auto-calibration and auto-tuning functionalities simplify setup and ensure optimal control performance. The position feedback system utilizes a non-contact Hall effect sensor for high accuracy and low maintenance. A local LCD interface with pushbuttons is optionally available for field access. Housed in corrosion-resistant copper-free aluminum or optional 316L stainless steel, the unit's internals are constructed from stainless steel, PPS, Ryton, and aluminum 6061-T6, with a C4-rated grey polyurethane finish per ISO 12944-2.

Specifications:

– Manufacturer: Dresser Masoneilan
– Model Name: SVI II (Smart Valve Interface II)
– Model Number: SVI2-21123121
– Serial Number: C212330256
– Enclosure Protection: Type 4X / IP66
– Operating Temperature Range: -40°C to +85°C
– ATEX Flameproof and Intrinsically Safe: Ex d [ia] IIC T6
– North American:
 – IS-CL I, Div 1, Groups A, B, C, D
 – DIP CL II/III, Div 1, Groups E, F, G
– Continuous Monitoring: Valve cycles, travel, operation time
– Offline Diagnostics: Step response testing
– Online Diagnostics: Friction analysis, real-time monitoring
– Auto-Calibration: Automatic zero and span setting
– Auto-Tuning: Dynamic control parameter adjustment
– Position Feedback: Non-contact Hall effect sensor
– Local Interface: Optional explosion-proof LCD with pushbuttons
– Housing Material:
 – Standard: Copper-Free Aluminum (ASTM B85 SG100A)
 – Optional: 316L Stainless Steel
– Paint: Grey Polyurethane (ISO 12944-2 Category C4)
– Internal Components: Stainless Steel, PPS, Ryton, Aluminum 6061 T6

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