SKP75.011U1 Siemens Actuator

Overview

The Siemens SKP75.011U1 is a high-performance electro-hydraulic actuator designed for use with VG series gas valves. This versatile unit integrates three critical functions—safety shut-off, constant pressure regulation, and air/gas ratio control—into a single compact device. By maintaining the burner manifold gas pressure as a function of combustion air pressure, it eliminates the need for separate constant pressure regulators, streamlining gas train design and reducing overall installation size and weight.

Features

• Combined safety shut-off, pressure regulation, and air/gas ratio control in one unit
• Integrated Proof of Closure (POC) with over-travel SPDT switch for safety verification
• Automatic compensation for fluctuations in combustion chamber back pressure and air temperature
• Modular design allows for 360 degree actuator rotation for flexible field installation
• Visual position indicator and “power on” indication light for easy monitoring
• Fast-closing fail-safe spring return (less than 0.8 seconds) upon power interruption
• Low power consumption (typical 13.5 VA) and quick-connect wiring terminals

Specifications

• Model: SKP75.011U1
• Operating Voltage: 120 Vac (50/60 Hz)
• Protection Rating: IP54 (NEMA 1, 2, 5, 12; NEMA 4 with optional gasket)
• Weight: 5.1 lbs (2.3 kg)
• Operating Temperature: 5 F to 140 F (-15 C to 60 C)
• Maximum Stroke: 1 inch (26 mm)
• Opening Time: Approximately 2 mm/s (varies by valve size)
• Compatibility: Fits VG series gas valve bodies from 1/2 inch to 6 inches

Applications

• Industrial and commercial burner systems requiring precise fuel-to-air ratio management
• High-efficiency combustion equipment such as boilers, furnaces, ovens, and dryers
• Premix burner applications where consistent air/gas tracking is essential
• Retrofitting existing gas trains to reduce component count and pressure drop
• Systems utilizing preheated combustion air or recuperative burners