Stock Masoneilan Control Valves SVI2AP SVI2-21123121 SVI2-21123111 Digital Valve Positioner Price

The Masoneilan SVI II AP is a high-performance digital valve positioner designed for single- and double-acting pneumatic actuators. It uses a two-wire 4-20 mA signal with HART communication to provide precise valve control. Many plants choose it for critical loops because of its fast response, excellent accuracy, and powerful diagnostics that help predict valve problems before they cause downtime.

• Non-contact Hall effect position sensor – no wear, long service life
• Explosion-proof local display and pushbuttons – setup without opening cover
• Fast commissioning with auto-tune and auto-stop functions
• Two-stage high-flow pneumatic relay for quick actuator movement
• Five internal pressure sensors for detailed valve diagnostics
• Field-upgradeable firmware and diagnostic levels
• Optional 316 stainless steel housing for corrosive/offshore environments
• Low steady-state air consumption

• Input Signal: 4-20 mA DC (9 Vdc minimum terminal voltage at 20 mA)
• Communication Protocol: HART Revision 5 or 7
• Air Supply: Single-acting 20-100 psi (1.4-6.9 bar); Double-acting 20-150 psi (1.4-10.3 bar)
• Ambient Temperature: -50 °C to +85 °C (-58 °F to 185 °F)
• Accuracy: ±0.5% of full span
• Linearity: ±1.0% of full scale
• Hysteresis + Deadband: ±0.3% of full span
• Repeatability: ±0.3% of full span
• Enclosure Rating: IP66 / NEMA 4X
• Housing Material: Aluminum ASTM 360 (standard), 316L stainless steel (optional)
• Approvals: ATEX, IECEx, FM, CSA, SIL 2 capable

• Critical control valves in refineries and petrochemical plants
• High-cycle or fast-response control loops
• Single- or double-acting actuators
• Hazardous area installations requiring local interface
• Processes needing advanced valve diagnostics

Q: How accurate is the positioning?

A: Typically ±0.5% of full span.

Q: Can I upgrade diagnostics in the field?

A: Yes – firmware and diagnostic levels can be upgraded on site.

• SVI II standard performance version
• ValVue software for advanced diagnostics
• Masoneilan control valves and actuators