Gas Solenoid Valves – VMR Series Safety Shut-Off Valves
Overview of Elektrogas VMR Gas Solenoid Valves
The VMR series gas solenoid valves from Elektrogas are fast-opening, fast-closing shut-off valves designed for safety and reliability in industrial gas applications. These normally closed valves are essential in gas burner systems, boilers, kilns, and other gas-consuming equipment.
Key Features of VMR Gas Safety Shut-Off Valves
Robust Construction and Versatility
Made from die cast aluminium alloy or hot-pressed brass (VMR-OTN version)
Connection sizes from DN 8 to DN 150
Designed for use with air and non-aggressive gases (EN 437 families 1, 2, and 3)
Versions available for biogas and COG applications
Safety and Compliance
Normally closed: valve opens only when powered, ensuring safe shut-off
EN161 Class A back pressure sealing
Explosion-proof (Ex-proof) versions for ATEX Zones 2 and 22
Certified to SIL 3 (IEC EN 61508) for functional safety
Reliable and Durable Operation
Fast action: <1s opening/closing time
Flow rate adjustment (non-brass models)
Integrated fine mesh filter and pressure gauges
Continuous service capability (100% ED)
Designed for industrial cycling and high thermal/mechanical resistance
How VMR Solenoid Valves Work
Functioning Principle
The valve is closed when de-energised, held by a spring and gas line pressure
When energised, the magnetic coil pulls the disc, allowing rapid gas flow
Built-in regulating screw enables flow adjustment
On power loss, the valve immediately closes to stop gas flow
Typical Applications
Industrial gas trains
Atmospheric gas boilers
Power burners and kilns
Safety shut-off systems in commercial and industrial gas networks
Technical Specifications
Electrical Ratings
Voltage: 230V, 110V, 24V, 12V AC/DC
Power: Ranges from 20–90 VA depending on size
Protection Class: IP54 standard, optional IP65
Coil insulation: Class H (200°C), Class F (155°C)
Pressure and Flow Ratings
Max operating pressure: 200, 360, or 500 mbar
Flow factor Kvs: ranges from 0.27 to 315 m³/h
Temperature range: -15°C to +60°C
Material Compatibility
Gas-contact materials: aluminium, brass, stainless steel, NBR, FPM, PTFE
Seals available for aggressive gases like biogas and COG
Gas Flow Charts and Sizing
Pressure Drop Calculations
Detailed flow vs. pressure drop diagrams provided
Conversion formulas for different gas types (e.g., LPG, natural gas)
Selection guide using Kvs values and Δp formulas
Recommendations:
∆p ≤ 0.1p1
Flow velocities ≤ 15 m/s
Product Variants and Ordering Guide
Model Codes and Availability
Wide range of models from VMR01OTN to VMR95
Threaded and flanged options
Voltage and pressure variations covered
Special Options
Additional pressure gauges and micro-switches
Explosion-proof cable glands and sealed terminal boxes
LED indicator plugs (ISO 4400)
Flanged adapters for larger threaded models
Installation, Maintenance, and Safety Guidelines
Installation Tips
Install with coil horizontal or vertical (not upside down)
Protect from contaminants, water, and direct exposure
Always install upstream gas filters
Maintain free airflow for coil cooling
Maintenance and Lifespan
Perform annual maintenance
Replace valve every 10 years due to seal aging
Ensure installation complies with local gas safety codes
Compliance and Certifications
Global Approvals
CE marked under Gas Appliance Directive (2009/142/EC)
ATEX compliant (94/9/EC) for Ex zones
Meets RoHS II, EMC (2004/108/EC), and Low Voltage Directive
SIL 3 certified for functional safety (TÜV Italia)