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Vacuum Assisted Centrifugal Pump
Vacuum Assisted Priming Centrifugal Pump

Vacuum Assisted Centrifugal Pump

A vacuum-assisted self-priming centrifugal pump is made up of two pumps, an end suction or split casing pump and a diaphragm pump. When there is no water in centrifugal pump, the diaphragm pump will operate to remove air out of the suction line until the pressure in suction line is less than atmospheric pressure which allows liquid to flow into pump.
Product Detail


Vacuum Assisted Priming Centrifugal Pump

How It Works


A vacuum-assisted self-priming centrifugal pump is made up of two pumps, an end suction or split casing pump and a diaphragm pump. When there is no water in centrifugal pump, the diaphragm pump will operate to remove air out of the suction line until the pressure in suction line is less than atmospheric pressure which allows liquid to flow into pump. When there is sufficient water in the pump, which means it’s primed and ready to pump, diaphragm pump continues to operate on low power until it’s required again. If pump ever loses prime or there is no liquid left, the process starts automatically again.

Vacuum Assisted Priming Centrifugal Pump

Why It Is Advantaged

ECO Friendly Vacuum Priming System

The self-priming system utilizes a specially designed 3rd generation vacuum pump technology. It enables any centrifugal pump finish priming within seconds to tens of seconds. It has extraordinary features like large air process capability, high vacuum, low operation temperature, maintenance free, oil and mechanical seal free etc, which sets up a new benchmark in self-priming pump market.

Auto Switch System

The self-priming system will be switched to sleep status automatically once priming was finished. When it is used for general purpose application, self-priming system only operates for a few seconds for priming, and which makes it almost unnecessary for daily maintenance or changing spare parts at its life cycle.

Auto Switch System

Dry Running Protection System

Vacuum assisted priming pumps can run dry for a long time without damaging its mechanical seal due to its dry running protection system, which consists of a normal mechanical seal, an oil chamber and an oil reservoir. The oil chamber and oil reservoir are connected by two hoses and forms an oil circulating loop. As an option, the mechanical seal stationary seat can also be made with an air cushion designed surface which eliminates the use of oil lubrication in case of pump’s long time dry running. We can also use a set of lip seals to replace the mechanical seal as option 2, and it makes the sealing result even better and subsequent maintenance easier.

Dry Running Protection System

Cooling System

A pressurized cooling flush water is introduced from centrifugal pump’s water passage through an access port into vacuum pump’s water jacket which contains the entire vacuum pump. Cooling water flows into the water jacket from one side through a suction hose and discharges from the other side, then returns back to the centrifugal pump’s suction side through a discharge hose. Pressurized flushing water cools the vacuum pump quickly and brings most of the heat out of the vacuum pump’s cavity, which keeps the vacuum pump run at a very low temperature and makes the self-priming system an extraordinary long life.

Cooling System

Easy Disassembling Structure

It is very convenient to remove the vacuum pump’s cover from its non-drive end, and slides can be easily pulled out for inspection or replacement. It is also easy to access to the centrifugal pump’s impeller, wear ring or mechanical seal for inspection or maintenance without removing diesel engine or pump’s frame since the centrifugal pump’s suction cover can be fully opened.

Easy Disassembling Structure

Non-clogging Impeller Design

All the solids handling vacuum assisted priming pumps were designed with a wide water passage impeller which allows solids with 3” diameter or larger pass through the impeller easily. Vacuum assisted priming pumps can be widely used in any critical application like sewage, sludge and even processing fluid with large size stones.

Non-clogging Impeller Design

Self-cleaning Function

Vacuum assisted priming pump’s stuffing box was designed with a special structure to mix and discharge solids. Any small size solids or sands entering into the stuffing box will be mixed by the mixers located on the wall of stuffing box, and then be discharged to the outside of the stuffing box with the centrifugal force generated by the impeller back vanes. This self-cleaning function keeps the mechanical seal spring from clogging by any solids or sands accumulated inside of the stuffing box efficiently so as to avoid any mechanical seal failure.

Self-cleaning Function

Proven Technology

Vacuum assisted priming pumps own multiple proven technologies. Because of self-priming system’s powerful function, they can be used in almost all aspects of fluid industry, such as Dewatering, By-Pass, Fire-Fighting, Lift station back-up system, mining, irrigation, water transfer and well point system etc.

Eco-friendly Drain Collector Base

Attenuated pump base was designed to contain any possible leakages from pump, engine or from internally installed fuel tank. A drainage port and plug are available for easily draining the leaked liquid. All pump base was designed with a large internal space so as to contain min. 110% of the total capacity of the diesel tank and all engine fluids.

Eco-friendly Drain Collector Base

Air-water Isolator

Vapor is normally generated during vacuum pump’s evacuation, and then becomes either water or ice staying inside of the vacuum pump when ambient temperature is low. The accumulated water or ice is a big threat to vacuum pump especially in cold area, so an air-water isolator is suggested to be installed in every pump to collect the vapor/water before it enters into the vacuum pump.

Auto Start/Stop Control

Remote control is available when a water level sensor is installed on the pump so as to control the pump’s start/stop automatically. A state-of-the-art microprocessor-based digital engine control monitors all engine functions including alarms. The control panel features and easy-to-read 32-character display. It is ideal for conserving fuel, avoiding engine overhauls and comes standard on all vacuum assisted priming pumps.


Selection Chart and Performance Range

Low-Head

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM

up to

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM

up to

LH100S8

4

4

8

1400

120

3

2200

LH300S15

12

12

15

6600

108

4

1250

LH100S10

4

4

10

1700

150

3

2000

LH350S21

14

14

24

12320

200

3.58

1000

LH150S10

6

6

10

2600

168

3

2200

LH500S39C

20

20

39

20680

183

5.98

585

LH150S11

6

6

11

2700

160

3

2000

LH600S33A

24

24

33

26400

107

6.5

585

LH200S11

8

8

11

4400

145

3

2000

LH750S33A

30

30

33

37400

65

8

485

LH200S12

8

8

12.25

4400

170

3

1800

LH1050S46B

42

42

46

66000

85

9.8

360

LH250S12

10

10

12

5280

116

4

1800









Selection Chart and Performance Range

Medium-Head

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM

up to

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM

up to

MH100S14

4

4

14

1650

425

3

2300

MH80C14

5

3

14

950

354

Clean
Water

3000

MH150S14F

6

6

14

3100

270

3

2000

MH100C14

5

4

14

1260

340

3000

MH150S14E

6

6

14

3000

290

3

2000

MH125C14

6

5

14

2376

340

2500

MH200S17

10

8

17

6800

440

3.5

2000

MH150C14

8

6

14

2700

280

2100

MH300S17

12

12

17

9000

300

3.75

1780

MH200C14

10

8

14

4750

175

1800









MH150C17

8

6

17

3168

370

1900









MH200C17

10

8

17

4900

320

1800

Medium-Head

High-Head

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM
up to

Model

Suct.

size
(inch)

Disch.

size
(inch)

Impeller

dia.
(inch)

Max.

flow
(gpm)

Max.

head
(feet)

Max.

solids
(inch)

RPM
up to

HH100C19

4

3

19

800

800

Clean
Water

2400

HH150C17

6

5

17

2100

550

Clean
Water

2300

HH125C17E

5

3

17

880

564

2300

HH150C21

6

5

21

2200

530

1800

HH125C17F

5

4

17

1260

557

2300

HH200C21

8

6

21

3500

510

1800

HH125C21

5

4

21

1200

520

1800

HH200S22

8

6

22

4200

640

2

1900

HH150C22

6

4

22

1650

600

1900

HH250S22

10

8

22

8400

590

4

1800









HH300S22

12

8

22

10560

780

3

2000

High-Head

Application

1.png Emergency Flood Control, Water Drainage

Emergency Flood Control, Water Drainage


Rush Repair, Extension, Parallel In, Relocation of Pipe Network

Rush Repair, Extension, Parallel In, Relocation of Pipe Network


Emergency Fire Fighting

Emergency Fire Fighting


Emergency Movable Pumping Station

Emergency Movable Pumping Station


Water Control of Civil Construction

Water Control of Civil Construction

Modern Agriculture

Modern Agriculture


Well Drilling, Hydrofracturing

Well Drilling, Hydrofracturing


Water and Sewage Drainage of Mines

Water and Sewage Drainage of Mines


Water Environment Treatment

Water Environment Treatment


Industrial Wastewater Treatment

Industrial Wastewater Treatment



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