JS GST-22 2″ 400v Grinder Sewage Submersible Pump

Description

The JS Pumps GST-22 (code 020-720) is a three-phase submersible sewage grinder pump with a 2.2 kW, 400v motor and a 2″ outlet. It delivers up to 320 litres per minute and a maximum head of 23 metres, with a cutter and high-chrome grinder ring shredding soft solids before they reach the impeller.

The GST-22 is the first of the 2″ models. It moves well over half as much again as the 1¼” GST-15 at a similar head, so it suits a bigger inflow or a site serving several buildings. Where the total head is higher, the GST-37 uses the same 2″ outlet and reaches 36 metres.

The pump body, impeller, oil chamber and motor covers are cast iron, the motor case and shaft are stainless steel, and the cutter and grinder ring are high-chrome cast iron. The mechanical seal is silicon carbide and carbon, running in an oil chamber, and the motor has a built-in overload protector. JS Pumps offers the pump free standing or guide rail mounted, so it can sit on a coupling foot and be lifted out of the chamber for servicing. The outlet is 2″ (50 mm) and the pump comes with 10 metres of power cable.

Features

• 2.2 kW motor, 400v three phase
• Up to 320 l/min and 23 m head
• 2″ (50 mm) outlet
• High-chrome cutter and grinder ring, rated by JS Pumps at up to 28,000 cuts per minute
• Cast iron pump body and impeller, stainless steel motor case
• Silicon carbide and carbon mechanical seal in an oil chamber
• Free standing or guide rail mounted
• 10 metres of power cable

Applications

• Package sewage stations serving several dwellings or units
• Commercial and industrial premises below sewer level
• Farm waste water with organic solids pumped to a sewer or treatment works
• Process waste water containing organic solids

Designed for sewage and waste water containing soft solids. Not suitable for sand, gravel, stones or other hard debris, which wear or jam the cutter, or for oils, solvents, chemicals or flammable liquids. It has no float switch, so it needs a three-phase control panel with level control.

The JS GST grinder range

Flow and head are maximums read from the performance curve above. See the JS GST grinder sewage pump range page for help choosing between models, or the Pentax DTR and DTRT range for higher heads.