SKP25.303E2 Siemens Pressure Regulator

Overview

The Siemens SKP25.303E2 is a high-performance electro-hydraulic actuator designed for use with Siemens VG series gas valves. This safety-critical component functions as a combined safety shut-off valve and constant pressure regulator, making it an essential part of industrial and commercial burner systems. It is engineered for rapid fail-safe closure, ensuring system safety by shutting off the gas supply in less than 0.8 seconds upon power interruption. The SKP25.303E2 is a “zero governor” version, meaning it can maintain a constant outlet pressure regardless of inlet pressure fluctuations, and is specifically designed for 230V AC operation.

Features

• Combined safety shut-off and gas pressure regulation in a single compact unit
• Zero governor design providing excellent pressure control with minimal droop
• Rapid fail-safe spring-return closure (less than 0.8 seconds) during power loss
• Slow opening characteristic (approx. 2 mm/s) for controlled burner start-up
• Integrated stroke indication visible through a transparent terminal box cover
• Modular design allows for 360-degree rotation to facilitate easy installation and field wiring
• Durable electro-hydraulic mechanism with an internal oscillating pump and relief system
• Protection rating of IP54 for reliable operation in industrial environments

Specifications

• Model: SKP25.303E2
• Operating Voltage: AC 230 V (50/60 Hz)
• Power Consumption: Approximately 13.5 VA
• Output Force: 100 lb (450 N)
• Maximum Stroke: 1 inch (26 mm)
• Closing Time: < 0.8 seconds
• Opening Time: 6 to 10 seconds for full stroke (varies by valve size)
• Ambient Temperature Range: -15 C to 60 C (5 F to 140 F)
• Weight: Approximately 1.6 kg (3.5 lbs)
• Electrical Connection: Terminal box for DIN EN 175301-803 design A connectors

Applications

• Industrial and commercial gas-fired combustion plants and burner systems
• Supervision of forced draft gas burners with mechanical or electronic air/fuel ratio control
• Use in boilers, industrial ovens, dryers, and process heating equipment
• Compatible with Siemens VGG, VGF, VGD2, VGD4, VRD, and VRF gas valve bodies
• Suitable for systems requiring precise manifold gas pressure control according to a fixed setpoint