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Mixed-Flow Volute Pump

Mixed-Flow Volute Pump
YM type

Durability and reliability as demonstrated in many power stations

Mixed-Flow Volute Pump

Bore

250-600mm

Total head

10-45m

Capacity

7-80m3/min

>Selection & Dimensions

Large capacity, High head

Single-suction, single-stage Mixed-Flow Volute Pump with large capacity and high efficiency, capable of operating near maximum limits.

Handles a variety of liquid properties

Pump structure allows for selection of suitable parts depending on the type of liquid, such as chemicals or gypsum slurry, that comes into contact with them.

Metallic parts

All parts that come into contact with liquid are metallic and unexpected problems that result from parts such as rubber linings are avoided.

Reduction of maintenance costs

Inspection from the coupling side with back-pullout disassembly greatly reduces costs and frequency of maintenance. (Not available with YM-2510 and YM-3020)

Large selection of materials

A wide variety of materials are available, including FC, SCS and YOKOTA's corrosion and wear resistant special stainless steel casting (YST), to meet the needs of various kinds of liquid.

Enhanced self-priming is also possible (Optional)

By interlocking the unique vacuum pump with a water-air separating mechanism (PAT.), self-priming even with suction piping across an embankment is possible, which enables automatic pumping operation. (YM-2512, YM-3022 and YM-3520)



Applications

Wet-type flue gas desulfurizer

 (>"Current Topics: Slurry Self-Priming")

Seawater intake/discharge

 (>"Current Topics: Seawater Intake")

Industrial water supply

Waterworks, Sewage

Agricultural irrigation

Cooling water circulation

General water supply/drainage

Other



Example applications and installations

Mixed-Flow Volute Pump
Many YM type pumps have been operating as circulation pumps
for desulfurizers at thermal power plants.


Automatic operation system with enhanced self-priming

Mixed-Flow Volute Pump / Example of automatic operation system with enhanced self-priming(PAT.)

Mixed-Flow Volute Pump / Example of automatic operation system with enhanced self-priming(PAT.)


For details, please refer to "Current Topics: Seawater Intake".


Structure

Mixed-Flow Volute Pump
Part name
1

Casing

2

Suction cover

3

Rear cover

4

Impeller

5

Liner ring

6

Liner ring (with protector)

7

Impeller ring

8

Rear plate

9

Bracket

10

Bearing case

11

Bearing cover

12

Bearing cover

13

Shaft

14

Impeller nut

15

Impeller washer

16

Sleeve

17

Seal ring

18

Gland

19

Gland packing

20

Cone roller bearing

21

Cylinder roller bearing

22

Casing packing

Specifications

Standard specifications

All parts which come into contact with liquid are made of metal and the shaft is fully sealed to avoid contact with liquid.

Slurry specifications

The impeller, including the closed type, has a wear-resistant shape with rear vanes at the coupling side. The liner ring with the protector prevents wear of the suction cover caused by slurry blown against it.
The rear plate, which is exchangeable, is installed at the rear side of the impeller to protect the casing from wear.

Shaft seal

Selection of the shaft seal most suitable for the type of liquid used and site conditions is possible.



Example of shaft seal (Optional)

Mixed-Flow Volute Pump / Example of shaft seal


For details of Non-External-Flushing Mechanical Seal, please refer to this page.



Selection chart & Outer dimensions

Selection chart
YM type

Model number explanation
XXXX-##@@-xP (**)


XXXX

: Pump type

##

: Suction/Discharge bore (cm)

@@

: Head classification

xP

: Electric motor pole number (2P, 4P, 6P, other)

(**)

: Electric motor output power (kW) at maximum performance (using normal water at normal temperature)


50Hz
Mixed-Flow Volute Pump YM 50Hz

60Hz
Mixed-Flow Volute Pump YM 60Hz

Outer dimensions
YM type

Mixed-Flow Volute Pump

Unit: mm

Model No.
Bore
Suction/
Discharge
Pump
Weight
(kg)
Motor
(Reference)
Base plate
A
B
D
E
F
T
S
Frame
No.
G
Z-d
K
N
L
M
R
n
J

YM-2510

300/250

660

300

320

130

425

20

745

260

225S

797

4-23

250

1100

1600

500

550

4

35

-2512

300/250

840

300

370

190

515

20

885

400

250S

880

6-23

150

900

2100

590

650

300

-65

-3020

300/250

660

320

365

125

480

15

845

320

225S

797

4-23

250

1100

1600

550

600

4

30

-3022

300/250

840

320

380

160

580

0

960

450

250S

880

6-23

150

900

2100

590

650

300

-70

-3030

300/250

1055

300

400

350

690

0

1090

800

250M

967

6-23

200

1000

2400

740

800

300

-20

-3520

350/300

1000

385

430

220

660

0

1090

800

280M

1083

6-23

250

1000

2500

690

750

300

10

-3530

350/300

1145

360

500

220

780

0

1280

1200

355L

1710

8-27

325

850

3200

1030

1100

300

100

-3540

350/300

1425

360

580

470

830

0

1410

1350

355L

1710

8-27

300

1000

3600

930

1000

300

50

-4040

400/350

1460

400

650

320

930

0

1580

1400

355L

1710

8-27

300

1100

3900

1030

1100

300

10

-4530

450/400

1480

450

600

300

880

25

1480

1900

355L

1710

8-27

350

1100

4000

1130

1200

300

35

-5550

550/500

1620

500

550

540

1000

0

1550

2700

400LL

1910

8-27

450

1200

4500

1130

1200

400

120

-5560

550/500

1740

450

650

550

1030

0

1680

3100

400LL

1910

8-27

425

1150

4300

1030

1100

400

110

-6060

600/550

2000

550

680

650

1185

0

1865

4500

500L

2300

10-33

300

1100

5000

1430

1500

500

-175

 Note:

YM-2510 and YM-3020 do not adopt back-pullout structure, and dimensions show those for flexible flanged-type couplings.

We manufacture to meet flange standards, such as JIS, API and ANSI, upon request.

Outer dimensions refer only to electric motors at maximum motor output, therefore there may be differences in outer dimensions. For details on related dimensional outline drawings, please contact us.

For information on the automatic operation system using our enhanced self-priming method, please contact us. We design and manufacture the control system in accordance with operational conditions. (YM-2512, YM-3022 and YM-3520)


Specifications stated here may be subject to change without notice due to product improvement.

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