Nocchi DHI 2-40M 230v Centrifugal Multistage Booster Pump

Description

The Pentair Nocchi DHI 2-40M (code 422-0240) is a horizontal multistage centrifugal pump in AISI 316 stainless steel, for 230v single-phase supply. It delivers up to 60 litres per minute, with 36 metres of head at 10 l/min and 17 metres at 60 l/min, from a 0.40 kW motor drawing 3.2 A. Suction and delivery are 1¼”. The pump weighs 11.0 kg and is 368 mm long.

The 2-40 is the entry model of the low-flow DHI 2 family, for small demands where you need steady pressure rather than volume: one or two outlets on an upper floor, a small washing system or a machine supply. If you need more pressure at the same flows, the DHI 2-60M adds about 10 metres at 40 l/min. If your demand is above 60 l/min, move to the DHI 4-30M, which gives the same 27 metres at 40 l/min but carries on to 120 l/min. The DHI 2-40T is the 400v three-phase version.

The pump body, impellers and shaft are AISI 316 stainless steel, the motor housing is die-cast aluminium, and the mechanical seal is carbon on ceramic with EPDM gaskets. The 2-pole motor runs at 2850 rpm, is IP55 rated and has Class F insulation. Suction and delivery are both 1¼” threaded connections, set at 90 degrees to each other. The pump is supplied as a bare pump and motor, without a pressure switch, vessel or controller.

Features

• Smallest and lightest DHI: 0.40 kW, 368 mm long, 11 kg
• 36 m at 10 l/min, 27 m at 40 l/min, up to 60 l/min
• 230v single-phase motor, 3.2 A
• AISI 316 stainless steel pump body, impellers and shaft
• Rated for clean water up to 90°C
• IP55 motor with Class F insulation, 2850 rpm
• 1¼” suction and delivery at 90 degrees

Applications

• Small booster sets for one or two outlets
• Washing systems and machine supplies at low flow
• Hot water transfer up to 90°C

Performance

The DHI is for clean water without suspended solids or abrasive material, up to 90°C, with a maximum operating pressure of 6 bar at 90°C. It is not self-priming: fill the casing and suction pipe before starting, and never run it dry. On 230v single-phase, connect it through a suitable isolator with fuses and motor protection, as Pentair’s manual requires. For drinking water boosting in the UK, draw from a break tank or cistern rather than connecting straight to the mains supply pipe without your water supplier’s consent.

The Nocchi DHI range

Figures are from Pentair’s DHI datasheet. See the Nocchi DHI multistage pump range page for help choosing between models and answers to common questions.