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Siemens Actuator SKP75 Series

Siemens Actuator SKP75 Series

Siemens
The Siemens SKP75 Series combines electrohydraulic gas valve actuation with an integrated gas-to-air ratio pressure governor. By adjusting gas pressure in response to combustion air pressure, it helps maintain the configured gas/air pressure ratio throughout the burner's modulation range. Developed for compatible Siemens VGx and VRx gas valves, the SKP75 is suited to modulating forced-draft burners, industrial boiler installations, and gas-fired combustion control systems.

Product Description

Siemens SKP75 Electrohydraulic Gas Valve Actuator Series

Siemens SKP75 Series actuators integrate electrohydraulic valve actuation with a gas-to-air ratio pressure governor. Developed for gas-fired combustion installations, they support burner systems that continuously adjust heat output through modulation.

By responding to changes in combustion air pressure, the SKP75 adjusts the gas pressure to maintain the configured gas/air pressure ratio across the burner's operating load range. When paired with an approved Siemens gas valve, the actuator also supports safety shutoff operation.

Key Features

  • Electrohydraulic gas valve actuator incorporating a gas/air ratio pressure governor
  • Adjustable gas-to-air differential pressure ratio ranging from 0.4 to 9
  • Helps preserve the preset gas/air pressure relationship throughout burner modulation
  • Controlled, damped valve opening followed by fast closure during shutdown
  • Permissible operating pressure up to 120 kPa, depending on the connected valve specifications
  • Model configurations offered with or without an end-position switch
  • Available electrical supply variants: AC 120 V and AC 230 V
  • IP54 enclosure protection, with IP65 possible when specified accessories are installed

Industrial Applications

  • Modulating gas burners with forced-draft air supply
  • Industrial steam generation boilers
  • Gas-fired industrial combustion installations
  • Industrial furnaces and process heating equipment
  • Burner gas-to-air ratio pressure regulation systems

SKP75 Model Variants

  • SKP75.001E1 / SKP75.001E2
  • SKP75.003E1 / SKP75.003E2
  • SKP75.501E2

Technical Note: Verify supply voltage, gas valve compatibility, permissible working pressure, and end-switch configuration when selecting an SKP75 actuator. Consult the official Siemens technical documentation before installation or equipment replacement.

Specifications

Siemens SKP75 Gas Valve Actuators – Technical Specifications

Brand Siemens
Actuator Series SKP75
Product Type Electrohydraulic Gas Valve Actuator
Pressure Control Function Integrated Gas/Air Ratio Pressure Governor
Supply Voltage AC 120 V (-15%/+10%) or AC 230 V (-15%/+10%)
Operating Frequency 50/60 Hz (±6%)
Power Requirement Maximum 10 VA (European versions)
Maximum Permissible Operating Pressure 120 kPa
Controlled Gas Pressure Differential 0.08-12 kPa
Adjustable Gas/Air Pressure Ratio 0.4-9
Factory-Adjusted Pressure Ratio 1.3
Regulation Accuracy <10% at minimum differential pressure; <2% at maximum differential pressure
Nominal Valve Opening Speed Approximately 2 mm/s
Valve Closing Response <1 second upon shutdown
Ingress Protection IP54 / IP65 with AGA66 accessory
Electrical Protection Class Class I
Ambient Operating Temperature -10 to +60 °C
Permissible Relative Humidity <95% RH
Approximate Weight 2.3 kg
Applicable Gas Families Gas Families I-III, depending on the valve used
Compatible Valve Families Siemens VGx/VRx series, subject to model compatibility
Referenced Industry Standards EN 161, DIN EN 88-1

Technical Note: These specifications reference Siemens Data Sheet CC1N7643en, issued on 06.04.2022. Check the complete SKP75 model designation and confirm compatibility with the selected Siemens gas valve before ordering, installing, or replacing the actuator.