SKP75.012U2 Siemens Actuator

Overview

The Siemens SKP75.012U2 is a high-performance electro-hydraulic actuator designed for use with Siemens gas valves. It serves as a safety shut-off valve and an air/gas ratio controller in a single compact unit. Engineered for industrial and commercial burner applications, this actuator regulates the burner manifold gas pressure in proportion to the combustion air pressure. By combining multiple functions, it simplifies gas train design, reduces weight, and improves overall system efficiency.

Features

• Safety shut-off function, pressure regulation, and air/gas ratio control in one device
• Integrated Proof of Closure (POC) switch for verifying the closed position
• Adjustable auxiliary switch for additional feedback or control integration
• Adjustable gas-air ratio ranging from 0.4:1 to 9:1
• Automatic compensation for combustion chamber backpressure fluctuations
• Visual position indicator and “Power On” indication light
• Modular design allows for 360-degree rotation for flexible field wiring
• Slow opening and fast closing (less than 0.8 seconds) for enhanced safety
• Low power consumption (typically 13.5 VA)

Specifications

• Model: SKP75.012U2
• Operating Voltage: 220 Vac to 230 Vac (+10% to -15%)
• Operating Frequency: 50 to 60 Hz
• Power Consumption: 13.5 VA
• Closing Time: Less than 0.8 seconds
• Weight: Approximately 5.1 lbs (2.3 kg)
• Protection Rating: NEMA 1, 2, 5, 12 (NEMA 4 with optional AGA66 gasket)
• Ratio Range: 0.4:1 to 9:1
• Approvals: UL listed, FM approved, CSA certified, and ISO 9001 certified

Applications

• Industrial and commercial forced-draft gas burners
• Premix burner applications requiring precise air/fuel ratio control
• Combustion plants with combined heat recovery systems
• Systems where combustion chamber pressure varies independently of load changes
• Compatible with Siemens VG series gas valve bodies from 0.5-inch to 6-inch sizes