8 / 6 E - G Ultra Heavy Duty Electric Motor Power Sand and Gravel Dredge Pump

• Max.Head: 30-50m
• Max.Capacity: >400 L/min
• Driving Type: Motor
• Impeller Number: Single-Stage Pump
• Working Pressure: High Pressure Pump
• Influent Type of Impeller: Single Suction Pump
• Model NO.: 8/6E-G
• Position of Pump Shaft: Horizontal Pump
• Pump Casing Combined: Horizontal Split Pumps
• Mounting Height: Suction Centrifugal
• Impeller: Closed
• Usage: Pump, Pumps, Condensate Pump, Slurry Pump, Circulating Pump
• Product Name: Sand Gravel Pumps
• Size: 4X6
• Material: High Chrome
• Color: Blue, Yellow or Green or as Customers′ Request
• Transport Package: Wooden Case
• Specification: CE, ISO
• Trademark: Naipu or OEM
• Origin: China
• HS Code: 84137010
• Production Capacity: 500sets/Month

Product Description

8 / 6 E - G Ultra Heavy Duty Electric Motor Power Sand and Gravel Dredge Pump

Naipu NP-G series of dredge and gravel pumps is designed specifically for continous pumping of extremely aggressive slurries, with a wide particle size distribution. Capable of handling large particles at consistently high efficiencies results in low cost of ownership. The large volume internal profile of the casing reduces associated velocities further increasing component life.

Typical Application -
Slag Granulation
Suction Hopper Dredging
Dredging
Barge Loading
Sand reclamation
Sugar beet

1. Application:
Absorb the silt and sand in the river, lake, sea, reservoir, pound, electric power plant, stone processing plant, deep well.

2. Technological Characteristic:
A horizontal, single-shell structure pump, flow components hardware nickel, chromium high abrasion resistant material and has good wear resistance, corrosion resistance and high reliability.

Pump and drive straight for the choice of the drive, V-belt drive, hydraulic coupling drive, drive reducer.

The discharge direction of pump can be oriented in any direction of 360° .

Pump in the direction of the export of a 360-degree rotation installation location to accommodate different installation conditions at the scene.

SEALING FORMS:
1 Packing gland For the suction or gravity condition. The pressure of sealing liquid should be 35Kpa higher than the discharge pressure of the seen in following table.

2 Expeller seal In general for gravity condition the gravity head should not be exceeded to 10% of the total head of the pump and the shaft power increase by 5% about.

3. Features:
High efficiency, wear resistant, stable performance.

4. Type notation:
8/6-G (orGH)
8-------------suction diameter(inch)
6-------------discharge diameter(inch)
E-------------frame form
G-------------gravel pump
GH-----------high-head of gravel pump

Construction Drawing 


NP-G Pump Performance Curve

                                               Note:Approximate performance for clear water,to be used for primary selection only.

 

NP-G Slurry Pump Performance Parameters
Model	Flow(m3/h)	Head(m)	Speed(r/min)	Efficiency(%)	NPSH r/m	Max permissible particle size/mm
6x4D-NP-G	187-36	7-51	1400-600	30-58	1.5-3.7	82
8X6E-NP-G	576-133	10-48	1400-800	60-54	1.2-4.2	127
10/8F-NP-G	930-216	11-44	940-500	65-34	3-7	178
12X10G-NP-G	1512-360	11-58	850-400	70-50	1.5-6	220
14X12G-NP-G	3168-522	9.5-66	700-300	68-60	2-8.5	241
16X14TU-NP-G	3024-900	14-45	500-300	70-50	3.5-6.5	254
10X8F-NP-GH	1091-324	19.2-56.5	800-500	72-60	1.5-5	180
12X10G-NP-GH	2232-612	28-77	700-450	73-60	1.5-8	210

Product Overview



Possible Faults and Settlements 
 

Faults	Reason	Settlement
1.Pump fails to discharge any water,The hand of pressure gauge beat violently	1.Suction pipe don't have enough water. 2.Suction pipe blocked or the valve is locked.	1. Inject enough water 2.unlock the inlet valve,clear the blocks 3.Exclude the air leakage
2.The pump can't discharge water,the hand of vacuum meter beat heavily.	1.The inlet valve is unlocked or silted up. 2.The resistance of suction pipe is too big or silted up. 3.The height of suction is too high.	1.Unlock the valve or desilting  2.improve the design of  suction pipe or desilt  3.Lower the height of the installation.
3.The pump can't discharge water,pressure gauge shows heavy pressure.	1.The resistance of the discharge pipe is too big. 2.The impeller blocked 3.The speed is slow.	1.Check and adjust the outlet pipe. 2.Clear the impeller 3. Improve the speed.
4.The pump doesn't rotate	The volute is silted up by the blocks.	Clear the blocks
5.The capacity is not enough	1.The blocks of the impeller or the inlet or outlet pipe. 2.The abrasion of the impeller is heavily. 3.The speed is low to normal  4.Pump is installed unreasonably or the leakage of the inlet pipe. 5.The transporting height is too high,the loss of the resistance of the inside pipe are too big. 6.The inlet valve not open enough or blocked 7.The packing seal leaks	1.Clear the impeller or pipe. 2.Change the impeller 3.Adjust the speed 4.Install again or stop leaking.   Decrease the height of the transport or reduce the resistance. Unlock the inlet valve   Compress the packing tightly
6.The motor of the pump is overloaded	1.The head of the pump exceeds the head of the working condition. 2.Not consider the slurry density when selecting the pump. 3.The packing press tightly	1.Turn down the outlet valve,cut the impeller or lower the speed. 2.Select the motor again. 3.Adjust the the screw of the  packing gland
7.Abnormal sound in the pump, and no water out	1.The resistance of the inlet pipe is too big. 2.The height of the suction is too high. 3.Cavitation occurred  there is air in the inlet The temperature of the liquid is too high	Clear the suction pipe and sluice valve. Lower the height of the suction  Adjust the water valve and let the pump operate in the defined limits. Block the leakage. Lowering the liquid temperature.
8.pump vibrates	1.pump cavitate  2.The block of the impeller single vane  3.The no concentricity  between the pump shaft and motor shaft 4.Fasteners or foundation loose	1.Adjust the water valve ,lower the height of the installation,reduce the resistance of the inlet. 2.Clear the impeller 3.Alignment again 4.Fasten the screw,and reinforce the foundation.
9.Bearing is overheat	1.lock the cooling water 2.lubrication is not good. 3.the lubrication oil is not clear 4.the wrong direction of the thrust bearing. 5.there is something wrong with the bearing.	Open the cooling water Adjust the oil quantity  Clear the shaft,change oil According to the inlet pressure,adjust the direction of the thrust bearing. Change the bearing
10.Packing short life	The material of packing is not good	Change the packing
11.pump leak oil	1.High oil level 2.The rubber parts invalid   3.Assembly problem	1.Lower the oil level 2.Change rubber spares 3.Adjust the assembly
12 Pump head leaking	1.The rubber parts not press well	Assembly again or press tightly

Contact US
Contact Person: Karen Tan