The Siemens VXG41.20 is a three-way control valve designed for mixing or diverting fluids in heating, ventilation, and air conditioning systems (HVAC), applicable in both open and closed circuits. It’s part of the Siemens Acvatix product family of large-stroke control valves.
| Parameter | Value |
|---|---|
| Connection | External thread (ISO 228-1) |
| Nominal Size | DN20 (G 1 1/4″) |
| kvs (Flow Rate) | 6.3 m³/h |
| Pressure Rating | PN 16 |
| Temperature Range | –25 °C to +150 °C |
| Body Material | Bronze |
| Internal Components | Stainless steel (seat, cone, spindle); brass stuffing box; EPDM seals |
| Weight | ~1.64 kg |
It doesn’t come with an actuator, but is compatible with Siemens SAX electric actuators and SKD/SKB hydraulic actuators
Mixing or diverting cooling water, chilled water, hot water, or brine (including water with antifreeze additives)
Suitable for use in open or closed circuit HVAC systems
Works well across a wide temperature range (–25 °C to +150 °C
Code explanation:
• VXG41: Siemens globe control valve series
• 20: Nominal diameter DN 20
• -6: Kvs = 6 m³/h (flow coefficient)
• 3: Indicates a 3-way valve
Typical applications:
• Heating systems
• Cooling systems
• Air Handling Units (AHU)
• Control of hot or chilled water flow
General specifications (typical):
• Medium: Water / water with glycol
• Pressure rating: PN16
• Compatible with Siemens actuators such as:
SQX / SKD / SKB / SKC (depending on required force and control type)
VXG41.20-6 (sometimes written Vxg41.20-6) is a Siemens control valve, commonly used in HVAC systems.