Xiangjing (Shanghai) M&E Technology Co., Ltd
| Payment Terms | T/T |
| Material | Aluminum Alloy |
| Delivery Time | 5-8 weeks |
| Application | General,industrial |
| Standard | DIN,ANSI,BS,ASTM |
| Type | Control,pneumatic |
| Power | Pneumatic,electric |
| Supply Ability | 2,700 units per year |
| Standard or nonstandard | Standard |
| Packaging Details | carton or wooden crate, 30 × 30 × 30 cm |
| Structure | Control,Angle stroke |
| Model Number | SVI II |
| Brand Name | Masoneilan |
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Product Specification
| Payment Terms | T/T | Material | Aluminum Alloy |
| Delivery Time | 5-8 weeks | Application | General,industrial |
| Standard | DIN,ANSI,BS,ASTM | Type | Control,pneumatic |
| Power | Pneumatic,electric | Supply Ability | 2,700 units per year |
| Standard or nonstandard | Standard | Packaging Details | carton or wooden crate, 30 × 30 × 30 cm |
| Structure | Control,Angle stroke | Model Number | SVI II |
| Brand Name | Masoneilan | ||
| High Light | Masoneilan SVI II digital valve positioner ，HART 4-20mA valve positioner ，control valve digital positioner | ||
Product Overview
The Masoneilan SVI II is a 32-bit microprocessor digital valve positioner with a local interface that controls a pneumatic actuator using a two-wire 4-20mA control signal. It offers bi-directional communication using the HART protocol, supporting HART 5 or 7 over 4-20mA. The universal design allows easy retrofit in place of existing analog positioners on Masoneilan or non-Masoneilan pneumatic actuators, either single-acting or double-acting.
Non-contact position sensing technology reads through the housing — no mechanical moving parts enter the main housing cavity, prolonging service life. The LCD and pushbuttons are operable in all certified hazardous environments, and commissioning is quick and accurate with auto stops and auto tune methods. One design fits both rotary and linear applications, remote or local.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Masoneilan |
| Communication Protocol | HART 5 or 7 over 4-20mA |
| Input Signal | 4-20mA, 450 Ohms input resistance |
| Data Interface | Wired |
| Diagnostics | Standard Diagnostics; Advanced Diagnostics (optional) |
| Supply Pressure (Single-Acting) | 20 to 100 psi max (1.4 to 6.9 bar) |
| Supply Pressure (Double-Acting) | 20 to 150 psi max (1.4 to 10.3 bar) |
| Air Delivery | 280 SLPM @ 30 psi |
| Action | Single or Double Acting, fail safe |
| Mounting Type | Actuator Mounted; Rotary or Linear; Remote or Local |
| Operating Temperature | -50°C to +85°C |
| Storage Temperature | -50°C to +85°C |
| Position Control | Throttling / Modulating |
| Supply Media | Air or low-sulfur natural gas (filtered and regulated) |
| Air Connections | 1/2" NPT (supply and actuator) |
| Area Classification | Flameproof/Explosion-proof, Intrinsic Safety, Dust Ignition proof, Non-Incendive |
| Certifications | ATEX, IECEx, US, Canada approvals; regional approvals available for Russia, Uzbekistan, Azerbaijan, India, China, South Africa, Brazil, Japan, South Korea, Taiwan |
| Housing Material | Copper-free Aluminum (ASTM 360); gray polyurethane paint (C4 per ISO 12944-2) |
| I/P Converter & Amplifier Materials | Polymer and stainless steel (300 and 400 Series) |
| Mounting System Material | Standard 300 stainless steel |
| Terminal Voltage | 9 Vdc at 20 mA |
| Minimum Current Signal | 3.2 mA |
| Power Interruption Without Restart | < 100 ms |
| Optional Position Transmitter | 4-20mA, two-wire loop powered with 10-24 Vdc compliance voltage |
| Optional Output Signal | Two configurable and embedded independent solid-state switches, 1A, 30 Vdc |
| Optional Remote Position Sensor | RPS assembly, cable up to 30 meters (100 feet), 2-inch pipe mounting bracket |
| Accuracy (Linear) | ±0.5% of full scale |
| Linearity | ±1.0% of full scale |
| Hysteresis + Dead Zone | ±0.3% of full scale |
| Repeatability | ±0.3% of full scale |
| Step Response | < 150 ms |
| Communication Software | ValVue |
Application Industry
The Masoneilan SVI II is used in power generation, refining, petrochemicals, midstream oil and gas, and upstream oil and gas. Key applications include steam turbine generators, condensers, cooling towers, reactor buildings, turbine buildings, heat recovery steam generators, balance of plant, distillation, hydroprocessing reforming, cracking, secondary blending, quenching and fractioning, charge gas compression, separation, pipeline integrity operations, dehydration, refrigeration, liquefaction, loading and shipping, regasification, and compression.
Common Problems
Autotune doesn't complete: The friction measured is more than 30% of the spring force or the valve is visibly jumping around the setpoint. Run Autotune with Aggressiveness settings of 2 or 4, or proceed to manually tune ensuring the Integral Gain (I) is set to a minimum of 100.
Position oscillation — Fast: Decrease the Gain (P) and (Padj) by 50% increments until oscillation ceases.
Position oscillation — Slow: Increase gain (P) and (Padj) by 5% increments until oscillation has reduced. Reduce the Integral Gain (I) by 25% until the position is flat line.
Valve friction greater than 25% of spring range: Increase the integral Gain (I) by 25% until the oscillation stretches out to a flat line. Set DeadZone parameter to 0.25%.
SelfCheckError (Hardware failure): Remove power to the device for two minutes and restart. Clear the alarm using ValVue or HART Host. If the failure persists, replace the complete device or electronics module.
Replacement Models
The Masoneilan SVI3 AP is the next-generation digital valve positioner from the same product line. It features stainless steel mounting brackets for any valve/actuator combination and is fully backwards compatible to SVI II AP and SVI1000 brackets. For cross-vendor alternatives, verify actuator mounting, travel range, and communication protocol before ordering.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2015
Total Annual:
30,000,000-50,000,000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive industr... Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive industr...
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