Description Combination Meter | WMC 50mm – 200mm METER SIZE (mm) 50 X 20 80 X 20 100 X 20 150 X 40 Max. Flowrate qs ± 2% (m³/h) 30 80 120 300 Permanent Flowrate qp ± 2% (m³/h) 15 40 60 150 Transitional Flowrate qt ± 2% (m³/h) 0.12 0.2 0.2 0.8 Minimum Flowrate q min ± 5% (m³/h) 0.03 0.5 0.5 0.2 Starting Flow (m³/h) Maximum Working Pressure (kPa) 1600 1600 1600 1600 Body Length (mm) 280 370 370 500 In addition, the meters offered must comply with the following: – Epoxy-coated cast iron body. By-pass meter must have a DZR brass body The main meter must be of the Woltmann WP helical vane inferential velocity type Meter must have the following features to facilitate convenience of on-site replacement: (a) Pre-calibrated replaceable internal mechanisms. (b) In Meter sizes 50 mm to 150 mm, the Helical vane to be fitted in a fully shrouded cartridge designed to direct the entire volume of water through the measuring element to ensure the body impact is negligible on the meter accuracy. Suitable for use with water temperatures up to 50°C and maximum working pressure of 1 600 kPa All internal plastic components to be constructed of virgin materials The meter must perform within the legal Class B accuracy specification with a straight length of pipe 10 X the diameter of the meter fitted upstream of the meter and 5 X the diameter fitted downstream of the meter Combination Meter | WMC 50mm – 200mm
