Advantage

Improve factory efficiency:

• Use embedded key performance indicators (KPIs) to achieve intelligent troubleshooting
• Has cloning capability and can be hot plugged as needed
• A device that is widely applicable to various environments and applications can reduce spare parts inventory
• Low loss pneumatic

Easy to use:

• Automated one click debugging
• The local user interface provides complete configuration functionality without the need for additional tools/handheld devices
• Integrate with major control systems and asset management software systems
• Adopting a new modular structure and digital upgrade method, it is easy to upgrade on-site
• Integrated input/output, no need for additional external accessories

Function

• Smart Cal - One click setup and calibration
• The user interface features high contrast graphic displays and buttons, meeting the level of use in hazardous areas
• NAMUR NE 107 Warning
• Universal design for linear and rotary valve applications
• Durable and sturdy non-contact shielded magnetic travel sensor
• Optional corrosion-resistant stainless steel or aluminum industrial metal casing
• Encapsulation and coating of electronic components
• Comprehensive diagnosis: cycle counting, step testing, ramp testing, initial values, and system

Health Indicators 

• Onboard valve position feedback and limit switch
• Stainless steel mounting bracket suitable for any valve actuator combination, fully backward compatible with SVI

• Equipped with explosion-proof and intrinsic safety universal labels, certified by the United States, Canada, ATEX, and IEC (models can be certified by various regions/countries)
• Compliant with HART ®  7 Communication Protocol
• Fully collectable actuator exhaust and locator exhaust

• Painting: Grey polyurethane and epoxy primer
• Protection: IP66 and NEMA 4X

Weight:

Material Science:

Input power and signal:

• Termination: Screw type terminal
• Wire entry: Two 1/2NPT female connectors

Optional input/output signals:

• A 4 to 20 mA output - position retransmission
• A configurable digital input
• A Masoneilan remote position sensor input: 1k Ohm
• A 1-5V remote position sensor input

Communication, setup, and calibration:

• HART ®  Protocol (7th edition)
• Can be integrated with major DCS systems, fully supporting DTM and EDD, including but not limited to:
• Emerson DeltaV / AMS
• Honeywell / FDM
• Yokogawa / PRM
• Optional local user interface with graphic LCD and keyboard, approved for use in hazardous areas
• Smart Cal one click calibration, including stop, air action, automatic adjustment, and scheduled adjustment

parameter set

• Environmental temperature and humidity limitations:
• Standard temperature: -40 ° C to 85 ° C
• (-40 ° F to 185 ° F), nitrile rubber diaphragm
• Optional extreme temperature: -55 ° C to 85 ° C
• (-67 ° F to 185 ° F), fluorosilicon diaphragm

Compatibility with tropical environments

• Antifungal properties comply with ASTM-G21
• Exposed circuits covered with antifungal coating
• The positive pressure shell is equipped with insect proof ventilation holes

EMC compliance standards:

• Compliant with IEC/EN61326-1 (2nd edition)
• Radiation: CISPR11 Class A
• Immunity: IEC/EN61000-4-2, 3, 4, 5, 6, and 8
• EMC 2014/30/EU Directive

Performance (2) complies with ISA S75.13:

• Accuracy of+/-0.5% of full scale
• Hysteresis+dead zone is+/-0.3% of full scale
• The repeatability is+/-0.3% of the full scale
• Power on (position control)<150ms
• Power off (no reset)<100ms

Valve actuator capability:

• Linear motion: 0.25 "to 8" (6.4 to 200 mm)
• Rotation motion: 18 ° to 140 °
• Travel sensor resolution: 0.0125% (typical value - rotation)

Pneumatic (single action only)

• Dry oil-free air or sulfur free natural gas - regulated and filtered
• Gas supply pressure: up to 1.4 to 8.3 bar (20 to 120 psi)
• Optional exhaust manifold for 100% collection

Air delivery:

• 410 SLPM (14.5 SCFM) @ 30psi

Air capacity:

• Inflatable Cv=0.66
• Exhaust Cv -0.51

Steady state air consumption:

• 2.8 SLPM (5.9 SCFH) @ 30psi
• 3.4 SLPM (7.2 SCFH) @ 45psi

Advanced diagnosis:

• Schedule, cycle, closing/opening time, approaching closing time, and alarm

off-line:

• Slope testing: hysteresis, dead zone, accuracy, and linearity
• Step test: overshoot, response resolution, and dead time
• Valve initial value: spring range, friction, and seat curve

Online valve diagnosis:

• Friction, stick slip, spring range, error offset, RMS error, blockage detection, calibration error, and set value cyclic testing

Hazardous Area Certification:

• Fire/explosion prevention
• Intrinsic safety
• Dustproof combustion
• Increased safety type (e)

Technical Brief of Meisonilan SVI3 Digital Valve Positioner 2025-06-13

1. If the model has not been selected before ordering, please provide us with the operating parameters:
   (1) Nominal diameter DN (mm);
   (2) Nominal pressure (MPa or bar);
   (3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
   (4) Pressure before and after the valve (pressure differential);
   (5) Requirements for flow characteristics;
   (6) Materials of valve body and valve core;
   (7) Connection type;
   (8) Driving method (provide air supply pressure, driving voltage);
   (9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
   (10) On-site working conditions.
2. If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
3. When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.