JS GST-37 2″ 400v Grinder Sewage Submersible Pump

Description

The JS Pumps GST-37 (code 020-737) is the largest pump in the GST grinder range, with a 3.7 kW, 400v three-phase motor and a 2″ outlet. It delivers up to 330 litres per minute and lifts to 36 metres of head, with a cutter and high-chrome grinder ring shredding soft solids ahead of the impeller.

Choose it over the GST-22 when the total head is high: at 20 metres the GST-37 still moves far more than the GST-22, and it keeps pumping well beyond the 23 metre maximum of the smaller pump. For heads beyond 36 metres, look at the Pentax DTR and DTRT high head grinder pumps.

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

• 3.7 kW motor, 400v three phase
• Up to 330 l/min and 36 m head, the highest in the GST range
• 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

• Long or steep sewage rising mains
• Package sewage stations with a high discharge point
• Industrial and commercial sites well below the public sewer
• Farm and process waste water with 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 how to read a pump curve to check a duty point.