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VMERNA

Product catalog summary

Description
The VMRNA is an automatic vent valve designed for gas appliances, suitable for discharging excess or leakage gas into relief lines. It is a reverse acting solenoid valve that remains open when de-energized.

Features
The valve is constructed from aluminum alloy with connections ranging from 3/4” to 1”½. It is compatible with air and non-aggressive gases, with special versions available for aggressive gases like biogas. The valve is designed for continuous service and includes pressure gauge connections and an optional open position indicator switch.

Functioning and Application
When de-energized, the valve opens to allow gas to flow to a relief line, ensuring safe discharge in case of leakage. It is typically used in gas trains and industrial gas firing systems.

Technical Specifications
The valve supports various connection standards and operates at different voltages and pressures. It has a power consumption of 35W and operates within a temperature range of -15°C to +60°C. The protection class is IP54, with an optional upgrade to IP65.

Gas Flow Chart
The document provides a formula for converting air flow to other gases, considering specific gravity and standard conditions.

Ordering Information
Valves can be ordered based on connection size, supply voltage, and operating pressure. Special versions are available for NPT connections and biogas compatibility.

Special Versions and Options
Options include increased enclosure class, compatibility with ATEX zones, and additional features like LED indicators and standard plug connections.

Standards and Approvals
The valves comply with European standards such as EN 16304 and directives including Electromagnetic Compatibility, Low Voltage, and Pressure Equipment. The manufacturer is ISO 9001 certified.

Catalog excerpts

VMRNA Automatic vent valve for gas appliances 3/4”- 1”½

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ELEKTROGAS - Technical Sheet EE169 - 1118

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ELEKTROGAS - Technical Sheet EE169 - 1118 ELEKTROGAS - Technical Sheet EE169 - 1118 Functioning and application The VMRNA type valve is a vent valve for relief line. When it is de-energized, the spring pushes on the magnetic core and the disc is open, hence gas can flow to relief line. This device is usually integrated in burning system: when the system is de-energized, upstream safety shut off valves are closed, while vent valve is open, so that fuel gas inside pipe can be discharged in a safe area. In case of leakages of shut off valves, gas goes to relief line in a safe condition. When the...

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ELEKTROGAS - Technical Sheet EE169 - 1118 ELEKTROGAS - Technical Sheet EE169 - 1118

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ELEKTROGAS - Technical Sheet EE169 - 1118 ELEKTROGAS - Technical Sheet EE169 - 1118 Formula of conversion from air to other gases V = k • V GAS AIR Standard conditions: 15°C, 1013 mbar, dry When the flow read on the diagram is referred to operating pressure instead of standard conditions, the pressure drop Ap read on the diagram must be multiplied for the factor: (1+ relative pressure in bar)

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ELEKTROGAS – Technical Sheet EE169 - 1118 Valve type VMRNA Connections size 2 = ¾” 3 = 1” 35 = 1”¼ 4 = 1”½ M = integrated in VMM 1”¼-3” (*) Supply voltage and operating pressure -5 = 230V AC 500mbar -60 = 230V AC 6bar (only ¾”-1”) -5.B = 110V AC 500mbar -60.B = 110V AC 500mbar (only ¾”-1”) -2.C = 24V AC/DC 200mbar -20.C = 24V AC/DC 2 bar (only ¾”-1”) Special version N = NPT connection and 120V AC voltage J = version for bio gas (*) Pictures below show a VMM valve assembled with an integrated VMRNA element: VENT LINE

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ELEKTROGAS - Technical Sheet EE169 - 1118 VMRNA valve can be manufactured with NPT connection (ANSI-ASME B1.20) and 120V AC coil. Vent valve can be supplied in J version suitable for aggressive gases (i.e. biogas). This version is free of nonferrous metals and equipped with special seals. provided with a sealed 2 and 22, according to • Enclosure class can be increased up to IP65. The valves will be terminal box and cable set. • Valves can be provided with a special execution for use in Zones 2014/34/EU Directive (ATEX): category II 3 G,D Ex tc IIIB T135°C Dc X or Ex tc IIIC T135°C Dc X (IP65)...

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VMERNA

VMERNA

Catalog excerpts

All Elettromeccanica Delta S.p.A. catalogs and technical brochures