boiler feed water multistage pumps

boiler feed water multistage pumps

 

Centrifugal Multistage Boiler Water Feed Pump

1. Dischage:1''-18''
2. Head: 2500 M
3.Capacity: 11000m3/h
4.Up to 12 stage

 

Product Description

This serial pump is multi-stage section Centrifugal Pump, the excellent hydraulic models are high-efficiency, energy-saving, and have wide performance range, operating safety & steady, low noise, long life and installing & repairing is very convenient etc. It can deliver heat water, oil, corrosive or wearalbe medium by changing the material, seal or adding cooling system.
1. The multi stage pump can deliver the neuter mineral water which solid particles percent≤ 1.5%(solid Dia, < 0.5mm) and other similar sewage,
2. Temperature of the liquid is ≤ 80° C. It is suitable for steel works, mines, cities projects etc.
This kind pump can deliver the corrosive liquid without solid particle, which temperature is from -20° C-150° C
The multi stage pump deliver oil or oil products without solid grain, viscosity ≤ 120ct, range of temperature is from -20 ° C to 150 ° C

 

boiler feed water multistage pumps Technical Specifications

 

Type	QD(G)
Capacity (m3/h)	120-11000
Head (m)	967-2500
Speed (r/min)	2980-5410
Eff.(%)	86-96
NPSHr (m)	4.5-23.5
Power (kw)	710-8000

 

boiler feed water multistage pumps technical data

 

♦ D multi impeller and centrifugal Multistage Pump
♦ Working Principle: Centrifugal
♦ Main applications: Water
♦ Driver: Electric Motor or Diesel Engine
♦ Max Liquid Temperature: 150°C
♦ Type of connection: Flange
♦ Casing Material: cast steel, stainless steel
♦ Impeller Material: cast steel, stainless steel
♦ Seal: mechanical seal/packing seal
♦ Flow Range: 120~1100m3/h
♦ Head: 967~2500m

 

boiler feed water multistage pumps structure

 

The multi stage pump is consist of stator, rotator, bearing, shaft seal:
1. Stator: The main parts are suction casing, stage casing, discharge casing and diffuser. They are screw up by poles, to become a working house. It is horizontal, the discharge direction is upward; The discharge and suction direction of them are both upwards, and the suction direction is horizontal usually, also they can be made upward according to user's requirement.
2. Rotor: It is consist of shaft, impellers, balance dic and shaft sleeve etc. Shaft supplied power to impellers; The axial force is balanced by balance disc; The sleeve mounted on shaft to protect shaft.
3. Bearing parts: It is consist of bearing body, bearing and bearing cover etc. The bearing of type 85-67, 155-67, 600-60 pump is sliding bearing, lubricated by diluted oil, the other pump bearing is rolling bearing, lubricated by grease.
4. Shaft seal: It is usually adopted soft packing seal, consist of sealing house on suction casing, packing, blocking water ring, the sealing hose have some pressure water, to cool, lubricate and seal pump. The pumps usually adopt mechanical seal.
5. Drive: The pump is driven directly by motor through elastic coumpling, the rotation of pump is clockwise looking from motor to pump.

boiler feed water multistage pumps parameter

 

QD(G) Series multistage pump data
Pump Type	Flow	Head	Power
	(m3/h)	(m)	(KW)
QD(G) 6-25	3-7.5	73.5-306	4-11
QD(G) 12-25	7.5-15	69-338.4	5.5-22
QD(G) 12-50	7.5-15	139.5-648	18.5-75
QD(G) 25-30	15-30	82.5-340	15-45
QD(G) 25-50	15-30	15.78-618	22-110
QD(G) 46-30	30-55	81-340	22-75
QD(G) 46-50	30-55	138-666	37-132
QD(G) 85-45	55-100	78-459	37-160
QD(G) 85-67	55-100	183-666	90-250
QD(G) 155-67	100-185	177-684	132-400
QD(G) 280-43	185-335	114-423	160-450
QD(G)280-65	185-355	372-680	500-800
QD(G)450-60	335-684	171-650	360-3400

 

 

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