WP-Dynamic Turbine Water Meter for cold water up to 50 º C / PN 16 DN 250 Special Features Hermetically sealed register ( IP 68) Patented hydrodynamically balanced rotor ( dDN 300) Patented symmetrical calibration adjustment ( dDN 300) Register may be rotated through 360° . High overload capability Pattern approved removable measuring element Powder coating affords max. corrosion protection Not affected by external magnetic fields . Performance Table Performance data WP-Dynamic 50 º C Nominal Diameter : DN 250 Size of meter ( acc. to EEC) Qn 400 Qmax ( ± 2% ) : 1600 m3/ h maximum peak flow once in life time 24 h Qmax or 5 min. 1, 2 x Qmax Qn continuous flow ( ± 2% ) : 1250 m3/ h Qt transitional flow ( ± 2% ) : 11.0 m3/ h Qmin minimum flow ( ± 5% ) : 6.0 m3/ h starting flow m3/ h : 3.0 m3/ h Performance data according to EEC-specification 30 º C class B Nominal Diameter DN : 250 Size of meter ( acc. to EEC) Qn : 400 Qmax maximum peak flow : 800 m3/ h short time Qn continuous flow : 400 m3/ h Qt transitional flow : 80.0 m3/ h Qmin minimum flow : 12.0 m3/ h