Self-Priming Pumps. Characteristic curves for suction lift Hs = 1 m. n 2900 rpm. H m. H m 50 Q 3

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1 Construction Close-coupled self-priming shallow well jet pumps with built-in ejector. NG: version with pump casing and lanter bracket in cast iron. B-NG: version with pump casing and lanter bracket in bronze (the pumps are supplied fully painted). Applications For drawing water out of a well. As pressure boosting pump for central water systems with low pressure (follow local specifications if increasing network pressure). For clean liquids or slightly dirty surface water. For garden use. For washing with a jet of water. Operating conditions Liquid temperature up to C. Ambient temperature up to C. Maximum permissible working pressure up to 1 bar. Continuous duty. Materials Components NG B-NG Pump casing Cover with lantern bracket Cast iron Bronze Diffuser plate GJL EN 11 G-Cu Sn 1 EN 19 Impeller Brass P- Cu Zn Pb UNI 7 Shaft Cr steel 1.1 EN 1 Cr-Ni-Mo steel (AISI ) for NG EN 1 Cr-Ni steel 1. EN 1 AISI 1 (AISI ) for NG --7- Ejector casing NG Cast iron GJL EN 11 - Diffuser PPO-GF (Noryl) Nozzle PPO-GF (Noryl) (Brass P- Cu Zn Pb UNI 7 for NG ) Mechanical seal Carbon - Ceramic - NBR Motor -pole induction motor, z (n 9 rpm). NG: three-phase / V ± 1%. NGM:single-phase V ± 1%, with thermal protector. Capacitor inside the terminal box. Insulation class F. Protection IP. Classification scheme IE for three-phase motors from,7 kw. Constructed in accordance with: EN -1; EN -. EN -1, EN --1. Special features on request - Other voltages. - Frequency z (as per z data sheet). - Protection IP. - Special mechanical seal Characteristic curves for suction lift s = 1 m n 9 rpm U.S. g.p.m. 1 1 U.S. g.p.m.1 U.S. g.p.m. Imp. g.p.m. 1 1 Imp. g.p.m Imp. g.p.m. 7 m NG NG 7/1 ft m NG 7/1 NG /1 ft 1 m NG 7/ NG / 1 ft 1 m Q l/min NG /1 1 NG NG NGM /1 NG /1 m 7 l/min 1 Q 1 NGM / NG / 1 m 1 Q l/min

2 Performance for suction lift s = 1 m n 9 rpm ~ V V B- NG /A B- NG /A NG E B- NG /1E B- NG /1E B- NG /E B- NG /1E B- NG /E B- NG 7/1/A B- NG 7/1/A B- NG 7//A A,7,7,7,7,7 7, 7, 9,1 9,1 9,1 A 1,7,,7,7,7,7,,,,, 1 ~ V P1 B- NGM /A B- NGM /A NGM E B- NGM /1E B- NGM /1E B- NGM /E B- NGM /1E B- NGM /E A,,7 7, 7, 7, 7, 9, 9, kw,9 1 1,7 1, 1, kw,,7 1,1 1,1 1,1 1,1,,, P P,7 1 Q m l/min m,, 1,,,,, 7 9 9,,1, 1,, 1,,, 7, 91, , , ,,, 9,,, 9,,, 9, 7,, 1,, 9 1,, 9, ,, 7, 9 7,,, 1, 7 7, , 7,, 7, ,,, 1, 7,, P1 Max. power input. P Rated motor power output. B-NG, B-NGM = Bronze construction. Tolerances according to UNI EN ISO 99:1 1

3 Characteristic curves n 9 rpm U.S. g.p.m U.S. g.p.m NG 1 NG Ø Ø l/min 1 l/s l/min l/s Q m U.S. g.p.m. 1 Ø l/min , 1, 1, NG NPS Q m , 1, 1, 1 NPS. Q m , 1

4 Characteristic curves n 9 rpm U.S. g.p.m. 1 1 U.S. g.p.m. 1 7 NG /1 NG /1 1 Ø 1 Ø l/min 7 l/s l/min 1 l/s Q m NPS Q m NPS U.S. g.p.m. 1 NG / 1 Ø l/min 1 1 l/s Q m 1 NPS 1

5 Characteristic curves n 9 rpm U.S. g.p.m. 1 U.S. g.p.m. 1 7 NG /1 NG / 1 l/min l/s NG / NGM /1 Ø 19 NG /1 Ø 17 NGM /1 Q m NPS 1 l/min l/s NG / Ø 17 NGM / Ø 19 NG / NGM / 7.17 Q m NPS 1

6 Characteristic curves n 9 rpm U.S. g.p.m Ø l/min 7 l/s NG 7/ U.S. g.p.m. 1 7 Ø 1 NG 7/ l/min 1 l/s Q m 1 1 NPS 1 Q m NPS U.S. g.p.m. 1 7 Ø 1 NG 7/ Q 1 l/min l/s Q m 1 NPS 1

7 NG Dimensions and weights NG /A,/A,E,E,7/A NG E a a1 DN fm a a1 fm DN DN1 h DN1 h g h1 g h1 m m1 w m.9.1 s n n1 b m w m1 m b n n1 s TYPE TIPO DN1 ISO DN a1 a fm h1 h 1 m m n1 n b s w g mm NG kg B-NG NG /A B-NG /A NG /A B-NG /A G 1 G , , 19,, NG E B-NG E NG E B-NG E NG 7/A B-NG 7/A G 1 1 / G ,, 1, 1,,9, NG E - G 1 1 / G Installation examples Positive suction head operation Suction lift operation 1 m Check valve Check valve. 17

8 Features Robust The mechanical structure of the hydraulic parts in contact with the pumped liquid are dimensioned to guarantee the maximum resistence to mechanical stress. Self priming The hydraulic design allows the pump to self prime even with the high suction lifts or with long suction pipe runs above the water level. Flexible The option to choose between cast iron and bronze materias for the hydraulic parts in contact with the pumped liquid allows NG series pumps to be selected for use with different types of liquids. 1