Rotary Gas Meters are precision measurement instrumentation designed to measure volume through positive displacement. The meters are designed for specific flow rates and should not be over sped. Instantaneous over speeding over a rotary meter may cause extreme damage to the meter, and disable the meter’s functionality. This can cause inaccuracies in the measurement or even cause the meter to lock up and block the gas pipeline. Instantaneous over speeding can be caused by a pressure drop or flow surges.

A restricting orifice plate installed downstream of the meter will help to protect the meter from over speeding. Rotary gas meter restrictor orifice plates are sized and designed to cause critical flow at around 120% of the meter’s rated flow capacity (for meters with a maximum allowable operating pressure of 175 PSIG or less). For higher pressure meters, the rotary gas meter restrictor orifice plates are designed for 100% of the meter’s rated flow capacity.

It is recommended to install the rotary gas meter restrictor orifice plates (2) to (4) pipe diamters downstream of the rotary gas meter.

Highlights:

• • 100% Stainless Steel
• • Exposed Handle
• • Normally in stock
• • Custom sizes available upon request