Siemens VRD Gas Valves

Siemens VRD gas valves are double-seat safety shut-off valves designed for use in industrial combustion systems operating with biogas and other special gases. They are specified where the characteristics of alternative fuels require valve bodies specifically engineered to maintain reliable shut-off and long-term operational safety.

VRD valves form part of Siemens’ combustion safety portfolio and are typically used in applications where standard natural gas valve bodies are not suitable. They are designed to operate in combination with Siemens SKP actuators as part of a complete gas train.

Typical Applications

• Biogas installations
• Waste-to-energy and renewable energy systems
• Industrial combustion processes using special gases
• Installations requiring double-seat safety shut-off

Valve Design and Safety Function

Siemens VRD valves incorporate a double-seat shut-off design, providing redundant isolation of the gas supply. This configuration supports safe operation in combustion systems where enhanced safety integrity is required.

The valve bodies are constructed to accommodate the specific properties of biogas and special gases, helping to maintain consistent performance and reliable sealing under demanding operating conditions.

VRD valves are designed for use with Siemens SKP actuators. The selected actuator determines the functional behaviour of the valve within the gas train, including shut-off operation and associated control functions.

Compatible Siemens SKP Actuators

Siemens VRD gas valves are used in combination with Siemens SKP actuators, including:

• SKP15 – Safety shut-off (ON/OFF)
• SKP25 – Safety shut-off with pressure regulation
• SKP55 – Safety shut-off with differential pressure air–gas ratio control
• SKP75 – Safety shut-off with adjustable air–gas ratio control

Correct actuator selection is essential to ensure compatibility with the valve body and to maintain safe and compliant system operation.

Available VRD Valve Sizes and Specifications

The Siemens VRD range is available in a variety of nominal sizes and connection configurations to suit different combustion system requirements. Detailed specifications for each VRD valve model, including pressure ratings and materials, are provided within the individual product listings below.

Replacement and Selection Guidance

When replacing an existing Siemens VRD gas valve, the full model number shown on the valve rating plate should always be matched. Valve size, pressure rating, and actuator compatibility must be confirmed to ensure safe operation.

If you are unsure whether a VRD valve is required for your application, or if an alternative Siemens valve family may be suitable, technical confirmation is recommended before ordering.

Related Siemens Components

• Siemens SKP gas valve actuators
• Siemens pressure switches
• Siemens burner and flame control equipment