Series VSG
Segmented V-Ball Control Valve
High-performance segmented V-ball control valve rated ANSI 150/300/600 with flanged and wafer ends. Available in 60° and 90° V-notch for precise modulating flow control with Class VI soft seat and Class IV metal seat shutoff.
Technical Specifications
Segmented V-ball control valve for precise modulating flow applications.
Sizes
1½″ – 12″ (DN 40 – DN 300)
Pressure Rating
ANSI 150 / 300 / 600 (900 on request)
Body Materials
CF8M (SS) / WCB / CF3M / Duplex
Seats
RTFE, TFM1600, CTFE, Metal Seats
Standards
ISA S75.04, ASME B16.34, ANSI B16.10
Quality / Test
ISO 9001 / 5209, API 598, TA-Luft, ISO-15848
Mounting
ISO 5211 Direct Mount
Features
-20°F to 750°F (TFM1600)
Why Choose the Series VSG
Precise V-Port Flow Control
Available in 60° and 90° V-notch configurations. High turn-down ratio delivers precise flow control while retaining ball valve durability and tight shutoff — a compact, economical alternative to globe control valves.
Trunnion-Mounted Design
Blow-out proof stem with 17-4PH stainless steel construction and PEEK stem bearings. Trunnion design provides stable ball positioning and reduced operating torque across the full pressure range.
Adjustable Inverted Packing
Inverted packing flange allows in-line stem packing adjustments without removing the actuator. TFM1600 packing with Viton gland seal and Belleville spring washers for consistent sealing force.
Seat Options & Shutoff Class
Choose between soft seat and metal seat configurations based on your application requirements.
Soft Seat — Class VI Shutoff
- RTFE, TFM1600, and CTFE (25% Carbon / 75% PTFE) seat options
- Temperature range: -20°F to 750°F (TFM1600) / -20°F to 450°F (TFM4215)
- Bubble-tight Class VI shutoff per ANSI/FCI 70-2
- Viton O-ring backup seal standard (Kalrez, EPDM, Silicone optional)
Metal Seat — Class IV Shutoff
- For high-temperature and abrasive service applications
- Stellite internal hardfacing available for severe erosion resistance
- Extended temperature capability beyond soft seat limits
- Consult factory for metal-seated torque values and sizing
Performance Data
Output torque, gear ratio, and ISO 5211 flange compatibility for all 15 models.
| Model | Gear Ratio | Input Torque | Output Torque | Efficiency | ISO 5211 Flange |
|---|---|---|---|---|---|
| VMGS007 | 42:1 | 80 Nm | 720 Nm | 21% | F10 / F12 |
| VMGS008 | 50:1 | 110 Nm | 1,200 Nm | 22% | F12 / F14 / F16 |
| VMGS108 | 72:1 | 130 Nm | 2,000 Nm | 21% | F14 / F16 |
| VMGS158 | 70:1 | 150 Nm | 2,500 Nm | 24% | F12 / F14 / F16 |
| VMGS208 | 68:1 | 210 Nm | 3,300 Nm | 23% | F14 / F16 / F25 |
| VMGS218 | 78:1 | 206 Nm | 4,475 Nm | 28% | F14 / F16 / F25 |
| VMGS238 | 175:1 | 170 Nm | 6,250 Nm | 21% | F16 / F25 |
| VMGS308 | 275:1 | 150 Nm | 9,800 Nm | 24% | F16 / F25 |
| VMGS358 | 532:1 | 170 Nm | 18,000 Nm | 20% | F25 |
| VMGS408 | 700:1 | 190 Nm | 32,000 Nm | 24% | F25 / F30 |
| VMGS448 | 1,233:1 | 165 Nm | 42,000 Nm | 21% | F30 / F35 / F40 |
| VMGS508 | 1,254:1 | 190 Nm | 60,000 Nm | 25% | F35 / F40 |
| VMGS608 | 1,855:1 | 190 Nm | 80,000 Nm | 23% | F35 / F40 |
| VMGS708 | 2,292:1 | 190 Nm | 100,000 Nm | 23% | F40 / F48 |
| VMGS808 | 3,525:1 | 190 Nm | 150,000 Nm | 22% | F48 / F60 |
Where This Solution Works
General Industrial
Flow control for process piping, steam, compressed air, and water systems across manufacturing and plant operations.
Water & Wastewater
Precise flow regulation in municipal and industrial water treatment, distribution systems, and chemical feed lines.
Chemical Processing
Corrosive media handling with Duplex, 316L, and exotic alloy options. Stellite hardfacing available for abrasive services.
Oil & Gas
Upstream and downstream flow control with TA-Luft and ISO-15848 fugitive emissions compliance and metal seat options.
HVAC & Mechanical
Chilled water, hot water, and glycol loop modulating control for commercial buildings, data centers, and district energy systems.
Pulp & Paper
High-Cv segmented ball design handles slurries and fibrous media with minimal clogging. Stellite hardfacing for abrasive stock.
Technical Resources
Engineering tools and documentation for the Series VSG.
Need Series VSG Valves
For Your Project?
Tell us your application requirements — size, pressure class, V-notch angle, and seat type. Our engineering team will provide valve selections, Cv calculations, and actuator recommendations within 24 hours.