Submersible Slurry Pumps GPN Series

Submersible Slurry Pumps GPN Series is a submersible high power, heavy-duty slurry pump incorporating an agitator to suspend solids enabling the pump to handle high concentration slurries. Being equipped with high-chromium cast iron wear parts, the pump delivers outstanding durability. The suction plate is adjustable enabling the pump to maintain the original performance*. The GPN utilizes a cooling water jacket to allow the pump to operate at low water levels for extended period of time without the fear of overheating.

Applications

Transferring and draining bentonite slurry in piling works.
Draining cement slurry or sand-carrying water in foundation works.
Draining aggregate and ore wash water in mines and quarries.
Collecting sediments in grit chambers at wastewater treatment plants.
Pumping scale at steel mills.

High-powered slurry pumps that deliver powerful agitation for discharging slurries laden with silt, earth, sand or other particulate

The GPN-series is a submersible three-phase high power and extra heavy-duty slurry pump driven by a 4-pole or 6-pole motor. It is equipped with a high-chromium cast iron agitator that assists smooth suction of the settled matters. The other wear parts such as the impeller and the suction plate are also made of high-chromium cast iron for extra durability. The side discharge, spiral design allows smoother passage of the sucked solid matters. The motor is cooled by a water jacket that assures efficient motor cooling even when it operates with its motor exposed to air.

Performance Curves

Discharge Bore mm	Model	Motor Output kW	Phase	Starting Method	Solids Passage mm	Dimensions L x H mm	Dry Weight^*2 kg	Cable Length m
80	GPN35.5	5.5	Three	D.O.L.^*1	30	487 x 796	145	8
100	GPN411	11		D.O.L.^*1	30	617 x 879	217	8
100	GPN415	15		D.O.L.^*1	30	617 x 879	220	10
100	GPN422	22		D.O.L.^*1	30	725 x 1102	415	10
150	GPN622	22		D.O.L.^*1	30	725 x 1102	415	10
200	GPN837	37		Star-Delta	46	1015 x 1606	800	10

Side Discharge Design with Water Jacket

The side discharge, spiral design allows smoother passage of the sucked solid matters. The motor is cooled by a water jacket assuring efficient motor cooling even when the pump operates with its motor exposed to air.

1.Anti-wicking Cable Entry
Prevents water incursion due to capillary wicking should the power cable be damaged or the end submerged.

2.Motor Protector
Circle Thermal Protector (15kW and below)
Directly cuts the motor circuit if excessive heat builds up or overcurrent occurs in the motor.
Miniature Thermal Protectors (22kW and above)
React to excessive heat caused by dry-running. The bimetal strip opens to cause the control panel to shut the power supply.

3.Chromium Molybdenum Shaft
Made of SCM435 (JIS), chromium molybdenum steel (tensile strength 930 N/mm2 and over). It has the superior performance against a shock given at the instant of sucking hard foreign matters.

4.Inside Mechanical Seal with Silicon Carbide Faces (15kW and below)
Dual Inside Mechanical Seals with Silicon Carbide Faces (22kW and above)
Isolated in the oil chamber where a clean, non-corrosive and abrasion-free lubricating environment is maintained. Compared with the water-cooled outside mechanical seal, it reduces the risk of failure caused by dry-heating and adhering matter. The silicon carbide provides 5 times higher corrosion, wear and heat resistance than the tungsten carbide.
*GPN422/622/837 have the Oil Lifter forcibly lubricating and cooling the mechanical seal.

5. High-chromium Cast Iron Impeller & Suction Plate

Made of high-chromium cast iron ensuring highest durability. Even if the performance drops due to wearing outof the impeller and/or suction plate, it can be improved by simply replacing the suction plate.

*GPN422/622/837 have an adjustable suction plate.

6. Agitating Mechanism
Consists of a shaft-mounted agitator and a dedicated strainer. The agitator made of high-chromium cast iron resists wear caused by abrasive particles, and it suspends solids to assist in pumping sediments in combination with the strainer.

Specifcations

	Discharge Bore mm	80	100			150	200
		GPN
		GPN35.5	GPN411	GPN415	GPN422	GPN622	GPN837
PUMP	Discharge Bore mm	80	100			150	200
	Discharge Connection	Hose Coupling
	Discharge Connection	Hose Coupling
	Solids Passage mm	30					46
	Solids Passage mm	30					46
	Impeller	Semi-open
		Semi-open
		High-chromium Cast Iron
		High-chromium Cast Iron
	Suction Cover	Gray Cast Iron
	Suction Cover	Gray Cast Iron
	Suction Plate	High-chromium Cast Iron
	Oil Seal	Nitrile Butadiene Rubber
	Casing	Gray Cast Iron
	Shaft Seal	Inside Mechanical Seal (without Oil Lifter)			Dual Inside Mechanical Seals (with Oil Lifter)
		Inside Mechanical Seal (without Oil Lifter)			Dual Inside Mechanical Seals (with Oil Lifter)
		Silicon Carbide
	Shaft Sleeve				403 Stainless Steel
	Agitator	High-chromium Cast Iron
	Agitator	High-chromium Cast Iron
MOTOR	Type	Continuous-duty Rated, Dry-type Induction Motor
	Type	Continuous-duty Rated, Dry-type Induction Motor
	Output kW	5.5	11	15	22		37
	Phase	Three
	Pole	4					6
	Insulation	E	B		F
	Starting Method	D.O.L.*2					Star-Delta
	Motor Protector (built-in)	CTP			MTP
	Motor Protector (built-in)	CTP			MTP
	Leakage Sensor (built-in)	-			Electrode
	Leakage Sensor (built-in)	-			Electrode
	ml	1100	2500		3600		9200
	Lubricant	1100	2500		3600		9200
	Lubricant	Turbine Oil (ISO VG32)
	Frame	Gray Cast Iron
	Frame	Gray Cast Iron
	Shaft	Chromium Molybdenum Steel
	Shaft	Chromium Molybdenum Steel
	ml	8		10
	Cable	Chloroprene Rubber
	Cable	Chloroprene Rubber
Dry Weight*1 kg		145	217	220	415		800
Dry Weight*1 kg		145	217	220	415		800