Overview
The Siemens VKP40.20 is a high-efficiency proportional controlling valve designed for the precise regulation of gas or air volume in combustion plants. Engineered for integration into gas trains, this valve features a specialized rotation cylinder that provides a proportional increase in volumetric flow across a 90-degree angular rotation. It is built to meet demanding industrial requirements, offering a wide modulation range and high positioning cycle frequencies to ensure smooth operation and consistent results in burner systems.
Features
- Proportional flow control with a linear increase across a 0 to 90 degree rotation
- Wide modulation range of greater than 25:1 for versatile performance
- Maintenance-free design suitable for high-demand industrial environments
- Robust housing construction with a rotation cylinder and coupling
- Compatible with various Siemens actuators, including the SQN and SQM series
- Ability to be attached to VGD2 double gas valves for integrated safety solutions
- Integrated mechanical stops at -5 degrees (fully closed) and 100 degrees (fully open)
Specifications
- Model: VKP40.20
- Nominal Size: 3/4 inch (20 mm)
- Connection Type: Flanged (requires AGF10 flanges for installation)
- Angular Rotation: 0 to 90 degrees
- Media Compatibility: Air, Natural Gas, and gases of families I, II, and III
- Operating Temperature: -5 F to 140 F (-20 C to 60 C)
- Protection Rating: IP54 (when used with appropriate actuators)
- Approvals: CE and EAC certified; complies with Gas Appliances Regulation (EU) 2016/426
Applications
- Control of gas or air volumetric flow in commercial and industrial combustion plants
- Integration into gas trains for burners requiring high-precision modulation
- Use in systems requiring small start volumes and extremely low minimum flows
- Compatible with burner management systems such as the Siemens LMV2 or LMV3 series
- Suitable for HVAC and boiler systems with high positioning cycle requirements



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