Nocchi DHI 4-30T 400v Centrifugal Multistage Booster Pump

Description

The Pentair Nocchi DHI 4-30T (code 422-1430) is a horizontal multistage centrifugal pump in AISI 316 stainless steel, for 400v three-phase supply. It delivers up to 120 litres per minute, with 27 metres of head at 40 l/min and 14 metres at 120 l/min, from a 0.50 kW motor drawing 1.7 A. Suction and delivery are 1¼”. The pump weighs 11.3 kg and is 368 mm long.

The 4-30 is the entry model of the higher-flow DHI 4 family. It gives a flatter curve than the DHI 2 pumps, holding 22 metres at 80 l/min and still delivering 120 l/min at 14 metres, which suits irrigation and supplies with several outlets open at once. For more pressure across the same flows, step up to the DHI 4-40T. If your demand never goes above 60 l/min, the DHI 2-40T gives the same head at 40 l/min from a smaller motor. The DHI 4-30M is the 230v single-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

• 0.50 kW motor, 368 mm long, 11.3 kg
• 27 m at 40 l/min, 22 m at 80 l/min, up to 120 l/min
• 400v three-phase motor, 1.7 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

• Garden and nursery irrigation
• Booster sets for low-rise buildings with several outlets
• Hot water circulation 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 400v three-phase it must be wired through an isolator with fuses and a thermal overload relay set to the motor’s running current, 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.