Gas Valve Actuation

Siemens SKP Series

Electro-Hydraulic Gas Valve Actuators for Industrial Burner Systems. Precision control and safety shut-off.

Series Overview

The Siemens SKP Series is a family of electro-hydraulic gas valve actuators designed for safe and reliable control of industrial gas valves in combustion systems. Unlike purely mechanical or solenoid-based solutions, SKP actuators use electro-hydraulic technology to precisely control gas flow, ensuring secure shut-off and stable burner operation.

The SKP Series is widely applied in industrial gas burners, boiler systems, and combustion equipment where controlled valve opening, rapid shut-off, and operational safety are essential.

Functional Architecture

SKP actuators are designed to be mounted directly onto compatible Siemens gas valve bodies.

Activation: Electrical signal from burner control unit.
Actuation: Internal hydraulic amplification mechanism opens the valve.
Safety: Automatic safety shut-off upon power interruption.
Operation: When power is removed, the valve closes immediately, ensuring safe fuel isolation.

The electro-hydraulic design provides stronger actuation force compared to standard solenoid valves, making SKP suitable for larger industrial gas valves.

Typical Applications

SKP Series actuators are commonly used in:

Industrial gas burners
Commercial boiler systems
Process heating equipment
Dual-fuel combustion systems
Burner management system (BMS) assemblies

They are typically integrated with Siemens burner control units and gas valve assemblies to form a complete fuel safety chain.

Electro-Hydraulic

High actuation force and precision control compared to standard solenoids.

Safety Shut-Off

Instant closure upon power loss ensures maximum system safety.

Core Functional Characteristics

All SKP Series actuators share these structural principles:

Electro-hydraulic actuation mechanism
Fast safety shut-off response
Direct mounting onto Siemens gas valve bodies
Designed for continuous industrial operation
High operational reliability in demanding environments

Model Differentiation Within the SKP Series

Different SKP models are designed to support specific functional requirements:

Single-stage opening
Two-stage or slow-opening configuration
Pressure regulation capability
With or without proof-of-closure function
Voltage variations

These differences allow the SKP Series to support a wide range of burner sizes and safety classifications.

SKP Series Variants

Model	Functional Type	Typical Use Case
SKP15	Single-stage actuator	Standard industrial gas burners
SKP25	Slow-opening actuator	Systems requiring controlled gas ramp-up
SKP55	With pressure regulation	Applications requiring precise gas pressure control
SKP75	Extended functionality	Complex burner safety configurations

Model selection should consider burner capacity, required safety logic, and gas valve compatibility.

Integration & Compatibility

SKP Series actuators are typically integrated with:

Siemens gas valve bodies
Burner control units (LME, LMO, LMV, etc.)
Gas pressure switches
Flame detection systems (QRB, QRA, RAR)

Together, these components form a complete combustion safety control architecture.

Positioning Within Industrial Combustion Systems

Burner Control Unit: Controls sequence and safety logic.
Flame Detector: Confirms combustion presence.
SKP Actuator: Represents the actuation layer, physically controlling gas flow based on verified safety conditions.