RPD Meters
The rotary gas meter is a displacement type gas meter. The actual measurement is performed by two 8-shaped impellers in combination with a measurement chamber. During a full revolution of the impellers a fixed volume is displaced from the inlet to the outlet of the meter. The number of revolutions represents the amount of volume passed. The volume is displayed on a direct read counter type index. Several low and high frequency pulsers can be used for flow computing or control purposes.
About Product
RPD meters are designed to meet the highest demands of reliable and accurate measurement of gas flow. The meters fully comply with the EN12480 and OIML R137 directives. The compact exchangeable aluminium cartridge allows local repair and on-site cleaning. The robust design of the casing and the cartridge makes the meter less sensitive to installation stresses caused by the connecting piping. A significant amount of misalignment of the connecting piping/flanges can be tolerated by the meter without affecting the meter performance or locking the impellers.
Technical Specifications
| Environment Class | M2 / E2 | |
| Protection Class Index | Universal ALU Index: IP54 or IP67 Basic Index: IP67 | |
| Accuracy Class | 1,0 or 1,5 | |
| Gas Temperature | -25 to +55 C / -40 to +70 C (EN12480) | |
| Max. Operating Pressure | 20 barg (Optional 300 #Class) | |
| Media | Natural gas, Town gas, Inert gases | |
| Metrological Approvals | MID by NMi & PED as per EN12480, OIML R137-1/2 | |
| ATEX Approvals | e II 2 G / Ex ia IIC T4…T6 | |
| Pressure / Temperature Tapping Pm (Pr) | 1/4" NPT / 6 mm | |
| Accuracy Class 1,0 | +/-1% for Qt-Qmax | |
| +/-2% for Qmin - Qt | ||
| Rangeability up to 1:160 | ||
| Larger Rangeabilities on request | ||
| Reproducibility < 0,1% | ||
| Electrical Outputs | Double Reed Switch or Wiegand | |
| Normally Closed Tamper Switch | ||
| Connectors | Binder male or female | |
| Multiple connectors on request | ||
| Materials | Meter body/ Impellers / Synchro plate | Aluminium, Hard Coated |
| Shafts / timing gears | Steel / Stainless steel | |
| Bearings | Stainless steel | |
| Gears | POM | |
| Index glass | Poly Carbonate, UV stabilized / Glass | |
| Plugs | Steel (Optional Stainless) | |
Photo Gallery
