Installation and operating instructions
7.1 Suction lift The maximum suction lift of the pump can be determined from the diagram, page 56. Example: If the suction lift is 10 ft, t he length of the suction pipe must not exceed 72 ft. MQ 3-35 MQ 3-45 Maximum flow rate [gpm] 22 Maximum inlet pressure [psi] 40 Pump discharge range [psi] 15-49 18-63 Maximum combined discharge pressure: Max.
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Spare parts CATALOGUE
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ALPHA - Grundfos
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api.grundfos.comIf the pump is installed above the liquid level, a non-return valve must be fitted in the inlet pipe below the liquid level. See fig. 4. Self-priming pumps We recommend an opening pressure of the non-return valve which is lower than 0.05 bar. Otherwise, the additional resistance will reduce the suction capability of the pump.
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api.grundfos.comEnergy savings High-efficient permanent-magnet motors. Flexibility Suitable for installation in existing systems. Comfort Low-noise operation. Safety Built-in electrical and thermal protection of the pump. User friendliness Simple setting and operation. Type key * Exception: UK version, size 15 = 1 1/2". Performance range Fig. 1 Performance range
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