SKP75.501E1 Siemens Actuator

Overview

The Siemens SKP75.501E1 is an electro-hydraulic actuator designed for use with Siemens gas valves to provide safety shut-off and air-gas ratio control in industrial and commercial burner systems. This compact unit combines three functions—safety shut-off, constant pressure regulation, and air-gas ratio control—into a single device, reducing the need for additional gas train components. It is engineered for precision, maintaining a constant air-to-gas ratio across varying load conditions even when airflow is disrupted or combustion chamber back pressure fluctuates.

Features

• Combined safety shut-off and air-gas ratio control in one compact unit
• Integrated end switch for proof of closure or valve monitoring
• Extended zero-point offset adjustment range of -4.5 mbar for precise low-fire biasing
• Slow-opening and rapid fail-safe closing (less than 0.8 seconds) upon power loss
• Visual position indicator showing the entire stroke range of the valve
• Modular design allows for 360 degree rotation for flexible installation and field wiring
• Built-in power indication light for easy diagnostic monitoring
• Automatic compensation for air temperature and combustion chamber pressure fluctuations

Specifications

• Model: SKP75.501E1
• Operating Voltage: AC 110 V (50/60 Hz)
• Power Consumption: Approximately 13.5 VA
• Operation: 1-stage opening and closing
• Opening Speed: Approximately 2 mm/s
• Full Stroke Opening Time: 6 to 10 seconds (varies by valve size)
• Protection Rating: IP54 (standard) or IP65 (with appropriate kits)
• Temperature Range: -15 C to +60 C (5 F to 140 F)
• Weight: 2.3 kg (approximately 5.1 lbs)
• Approvals: CE, EAC, and RoHS (when used with series VG valves)

Applications

• Industrial and commercial burners and boilers
• Supervision of air-gas ratio in gas trains for furnaces, ovens, and dryers
• Premix burner applications requiring optimal air-fuel mixtures
• Recuperative burners and systems utilizing preheated combustion air
• Process heating systems where reliable safety shut-off and pressure regulation are critical