IM-P736-02 EMM Issue 3
7
VLM30 In-Line Vortex Flowmeter
1. Safety Information
Supplier:
Spirax-Sarco Limited
Charlton House
Charlton Kings
Cheltenham
Glos
GL53 8ER
Warning!
Consult the flowmeter nameplate for specific flowmeter approvals before any
hazardous location installation.
All flowmeter connections, isolation valves and fittings for cold/hot tapping must
have the same or higher pressure rating as the main pipeline.
To avoid serious injury, DO NOT loosen a compression fitting under pressure.
To avoid potential electric shock, follow National Electric Code or your local code
when wiring this unit to a power source. Failure to do so could result in injury or
death. All ac power connections must be in accordance with published CE directives.
All wiring procedures must be performed with the power Off.
Before attempting any flowmeter repair, verify that the line is not pressurised. Always
remove main power before disassembling any part of the mass flowmeter.
Caution!
Calibration must be performed by qualified personnel. Spirax Sarco strongly
recommends that you return your flowmeter to the factory for calibration.
In order to achieve accurate and repeatable performance, the flowmeter must be
installed with the specified minimum length of straight pipe upstream and
downstream of the flowmeter’s sensor head.
When using toxic or corrosive gases, purge the line with inert gas for a minimum of
four hours at full gas flow before installing the flowmeter.
The ac wire insulation temperature rating must meet or exceed 85 °C (185 °F).
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