http://www.wcc.co.jp/en
E-mail overseaschemical@wcc.co.jp

Head Office
台湾華爾多科技股汾有限公司
Worchemi Taiwan Co., Ltd.

3F., ANTEX24, 1-1-14, Taito,
Taito-ku, Tokyo, 110-0016 Japan

81-3(5818)5130

81-3(5818)5131

Domestic sales department81-3(5818)5130

81-3(5818)5131

Overseas sales department81-3(5818)5134

81-3(5818)5131

台中市神岡區中山路 915 號
NO.915, Zhongshan Rd., Shengang Dist.,
Taichung City 42955, Taiwan
886-4-2562-8358
886-4-2562-8351
URL http://www.worldchemical.com.tw
E-mail worchemi@ms34.hinet.net

Nagoya OfficeWorld Chemical USA, Inc.

9F., Daiei Bldg., 1-11-20, Nishiki, Naka-ku, Nagoya-shi, Aichi,
460-0003 Japan
81-52(253)8426
81-52(253)8436

25691 Atlantic Ocean Dr. Unit B-15 Lake Forest, CA 92630, U.S.A
1-949-462-0900
URL http://www.worldchemicalusa.com
E-mail wca@worldchemicalusa.com

Osaka Office
3F., Kotani park Bldg., 1-19-25, Edobori, Nishi-ku, Oasaka-shi,
Osaka, 550-0002 Japan
81-6(6467)8565
81-6(6467)8566

Fukuoka Office
5F., Sunlife 3rd bldg. 2-5-19, Hakataeki-higashi,
Hakata-ku, Fukuoka-shi, Fukuoka, 812-0013 Japan
81-92(292)1458
81-92(292)1459

蘇州華而多科技有限公司
Suzhou World Technology Co.,Ltd.
江蘇省蘇州市相城経済開発区富元路402号
402, Fu Yuan Road, Xiang Cheng, Economic District., Su Zhou, China
86-512-6579-8212
86-512-6579-8215
URL http://www.worldchemical.com.cn
E-mail worldchemical@wcs.szbnet.com

Tsukuba Factory
6127-5, Onogo-machi, Joso-shi,
Ibaraki, 300-2521 Japan

81-297(24)1071
Service Center
6127-5, Onogo-machi, Joso-shi,
Ibaraki, 300-2521 Japan
81-297(24)1071

81-297(24)1075

81-297(24)1075■Note:●The contents are subject to change without notice.

●The catalogue is issued in August, 2022.

seriesValveless self-priming magnet drive pump
SUPERMAGseries
VA LV E L E S S S E L F - P R I M I N G M A G N E T I C P U M P

Valveless structure: Priming liquid remains.
Liquid

Air

Air

Air

1

2
Air

Air
Air

YD -2500GV
YD -2501GV /GV F
YD -2502GV /GV F
YD -4001GV /GV F
YD -4002GV /GV F

YD-4003GV/GVF
YD-5002GV/GVF
YD-5003GV/GVF
YD-5005GV/GVF

Before operation

5

During self-priming

3

Air

4
Stop 2 : Siphon cut（Leftover liquid）

During operation

Suction head : 5 m / 2 min.

Stop 1（Back ﬂow）

The liquid ﬂows back after stopping the operation, but our original
siphon cut structure blocks oﬀ the back ﬂow liquid quickly and leaves
enough self-priming liuqid in the casing.

GV pumps sprang from “More compact” are light and space saving. They have high self-priming performance.

The internal structure, which easily separates air from liquid, compresses much self-priming timeand improves the pump performance. The pump is compact, but the self-priming ability is ﬁvemeter in only two minutes. This is our valveless technology.

Install on tanks or upstairs

Strong against dry running!
1 Valveless structure

Our valveless structure leaves enough self-priming liquid to restart without a check valve.
It prevents dry running.

2 Heat release & insulated bearing

Installing pumps on tanks or upstairs save spaces,
promoting more eﬀective use of spaces.
It is suitable to downsize process lines or equipment andUpstairs

a strong ally to design production lines in limited spaces.

Pump up from deep tanks

Pump up froman underground pit

Narrow workspace

It is possible to pump liquid up from deep tanks due toUp-and-down piping

high self-priming ability. The pump shows stable andhigh performance inspite of the bore size, big or small.

Usually, dry runnung generates heat to sliding parts and the heated shaft and bearing
cause the pump damage. However, heat insulation material of our sliding parts and ourheat dissipation structure produce less heat deformation.

3

Air lock prevention
The air enters in pumps during self-priming operation, accumulating the air. However, our
special shape of the rear casingʼs inside and impeller easily move and discharge the air.

Environmental protection, earthquake countermeasuresDonʼt worry about liquid leakage due to unexpected accidents because of up-and-down piping without drilling.

Enable to plumb horizontally / up-and-down
It is possible to plumb under the diﬃcult condition like10 m pipping horizontally, up-and-down or no spacenear tanks that they are used to be hard to install pumps. (Example: To transfer liquid from cleanrooms to outside.)

For liquid whic is easy of gas lockThis anti-dry running self-priming pump is suitable for foamable liquid (Hydrogen peroxide, Sodium hypochlorite,

Space-saving!
The compact body is the smallest and light in this class.
Especially pumps with the motor (1.5kW and over) with strong rare-earth magnets are
small but powerful. (It is possible to use the pump for high speciﬁc gravity liquid.)

Sodium carbonate, etc.) that gas easily accumulates in pumps and piping.

To transfer high speciﬁc graviy liquid
It is necessary to change the impeller bore or increase the motor output if high speciﬁc gravity liquid is transferred.
Our GV transfers high speciﬁc graivty liquid eﬃciently without decreasing the pump performance.

seriesseriesAir release structure of
the rear casing with airlock prevention.

Both end support
shaft taken into
account durability.
● The both ends support structure
dramatically improvedthe durability of the shaft.
● Well abrasion resistat SiC shaft isavailable, too.

Bearing material isselectabledepending on liquid.

● The air release structure of therear casing works well formeasures against air lock with
the impeller air stay prevention.

●

Thebearingisselectabledepending on used liquid and● Pump up from top of tanks and no need drain outlets.

● Install far from tanks or ﬁltration system.

● 5 m self-priming ability increases the range of use.

● Strict install conditions are much relaxed.

● To tansfer liquid which is easy gas locked or hazarous liquid.

● Up-and-down piping is possible.

● Enable long horizontal pipings.

● No need foot valves.

with/without slurry.
● Three types of the material● The rear casing is reinforced withcarbon ﬁber, improving reliabilityof pressure resistance.

Standard: SiCor
ms entroo
an ironm
e
l
c
env
s in
ure ugheas a to )
m
.
l
m
etc
fro
tro
con sfer ationcon ranluti nce t (Gasiﬁlo
P istag-dlon

Others: Carbon / Ceramics(1.5kW and over)
A

Shaft

Rear casing

B

C

BearingSea
tre water
atm
ent

Priming water
plug
Nar

2O
10H e)

5meter2 minutes

row

a
3+
CO rbonNa2ium ca 2de)
(So H2O roxid
e
p
en
dro
lO ite) ked(Hy NaC chlor
loc
po
gas
t

（Suction head）

all

wo

rk s

t
Ins

pac

e

y
m h is easyiquiddiu
ich ey l

F

(So

h
vi
id w graliqu ciﬁ
fer h spesngta r hiTooB（Self-priming speed）

A

s

tair

ups

g
ipin

np

ow
d-d
-an

Up

C
D

rO4 )
H2Cic acidEom

Drain plug

r
(Ch

No

t
utle
in o

s
ank
of t

dra

Sel
f-

F

Loose ﬂange
No need to adjust theposition of bolt holes
due to this loose
ﬂange.

E(with
Exclusive motor terminalbox)

Outdoor type motor isadopted as standard.
The durability is much
improved. (0.26kW: indoor)● Strong rear-earth magnets are adopted.

adjust to the other side holes

enables to use in harsh environment（1.5kW and over) Compact but highwithout reducing durability. The box is on

performance.

replace from other products.

the motor for easy wiring.
● A seal is adopted for measures against
gas to corrodes motors or liquid leakage.
The motor life gets longer.
● 400V motor with an inverter is an
general- purpose motor.

ing
ope endrati suct
on
ion

over）

● The reinforced plastic terminal box

No worry about the dimention toprim

Compact due toadopt rear-earthmagnets.（1.5kW and● The loose ﬂange is adopted tofreely.

4

D Impeller & magnet

Wasttre ewate
atm r
ent

l3 )
FeChlorideic crr(Fe uCl2 ide)
C chlor● The impeller and magnets are casted(Coor troble in high temperature.
● Our original impeller shape resultshigh eﬃciency.

rppe

and have resistance to reverse rotation

p

Pum

m
fro
up

ting

m

fro

ks
p
p u d tan
PumgrounreundPump up fromdrums / pp containers

nks
d ta

qui

li
ng
chi
/ et

pla

Deadhead
operation

5

seriesseriesModel description

Outline dimension

⑤

⑦

⑨

Motor type

Main material

O-ring material

Speciﬁc gravity

1：Otherthan IE3
3：IE3

GP：GFR PP
CF：CFR ETFE

E：EPDM
D：Dai-el（FPM）

1：1.05/1.1
2：1.2
3：1.3
4：1.4
6：1.6
8：1.8
G：2.0

①

②

③

④

Discharge bore

Motor output

Model

25：25Ａ
40：40Ａ
50：50Ａ

00：0.401：0.75
02：1.503：2.205：3.7GV
GVF⑥
Bearing material
S : Sic ( Standard )C：High density carbon
A：Alumina ceramics

Back⑧
Frequency
5：50Hz
6：60Hz

Exploded view

Dimension（mm）■ Outer magnet■ Motor

Model

W

H

L

YD-2500GV1■ Casing■ Mouth ring

■ Bearing

196

325

YD-2502GV(F)3■ Base■ Shaft

YD-5002GV(F)3

g

f

i
φ12

160

130

130

255

70

167

275

j

18

130

276

84

190

305

22.5(25.0)
18

φ12
225

390

643

208

389

684

230

260

200

297

261

296

93

206

309

14-36

236

36-14

245

21
20

Part name※GV series： It is regulated by Catch-all. When exporting the pump, please observe the export regulations.

Material
GV series

GVF series
CFR ETFE

Shaft

Priming water plug

GFR PP

CFR ETFE

Rear thrust ring

Drain plug

GFR PP

CFR ETFE

Rear casing

Liner ringAlumina ceramics + GFR PPS

Alumina ceramics + CFR ETFE

CFR PTFE（GFR）PP + Magnet

For more information, contact us.

Rear casing support
Outer magnet

CFR ETFE + Magnet

Carbon / Ceramics / SiC※ ※ The exploded view is for only explanation of the structure. Parts are sold as a set.

6

Part name

GFR PP

Bearing

Discharge※GVF series：It is regulated by List Control. When exporting the pump, it requires export license by METI.

CasingImpeller

53.0(56.0)) is shown GVF series.

■ Impeller

NoticeMouth ring

32.0(35.0)

Test model：YD-4001GV3-GP-CD5（Used ﬂuid：Water）

Material
GV series

GVF series

Alumina ceramics / SiC
Alumina ceramics / SiC
GFR PP

Water temperature
Height 2m

Height 4m

FCD450-10 + Magnet

Motor

FC200 + Alumi frame motor

Base

GFR PP/FC200

O-ring

EPDM/FPM

Height 5m

40 ℃

45 ℃

50 ℃

55 ℃

60 ℃

29 sec.

36 sec.

35 sec.

44 sec.

49 sec.

58 sec.

1min. 09 sec.

1min. 10 sec.

1min. 16 sec.

1min. 23 sec.

Suction

1min. 03 sec.

1min. 16 sec.

1min. 20 sec.

1min. 30 sec.

1min. 50 sec.

Full discharge

1min. 31 sec.

1min. 47 sec.

1min. 52 sec.

2min. 07 sec.

2min. 20 sec.

Suction

1min. 39 sec.

−

−

−

−

Full discharge

2min. 13 sec.

−

−

−

−

Full discharge

CFR ETFE
FC200

Suction（Our experimental data）＊ The time of discharge at Height 5m (20℃) is 1 min. 48 sec.

5m

Material26.5(29.0)
29.0(31.5)

The ﬁgure in (■ Liner ring20.5(23.0)
24.5(27.0)

215
217

160

130

Weight(kg)
18.5

200
207

φ12

o

29.5(32.5)
248

YD-5005GV(F)3■ O-ringe622

YD-5003GV(F)3■ Drain plug

560

360

YD-4003GV(F)3■ Rear casing support

d

590
228

YD-4002GV(F)3■ Priming water plugc592

YD-4001GV(F)3■ Rear thrust ringb

533

YD-2501GV(F)3■ Rear casingaSuction：Time until water starts entering pumps.
Full discharge：Time until water is stably discharged from pumps.

7

seriesseries* Limited height of self-priming: 5m(Clear water 20 degrees)* Limited temperature of used liquid: To 80 degrees
If the product is used for liquid whose temperature
is 60 degrees and over.

Bore (mm)
Model

Suc.

50Hz

Dis.

25

60Hz

Std. spec.

Std. S.G.

Std. spec.

Std. S.G.

8-80

1.05

8-80

1.05

YD-2500GV1
YD-2501GV3

YD-4001GV3
40

40

11-1601.1

11-1601.8

YD-4003GV3
YD-5002GV3
YD-5003GV350

50

YD-5005GV3

12-110

1.1

8-80

1.8

12-1102.0

17-2001.1

17-2501.1

17-2001.4

18-250

Voltage（V）

0.4

3PH／200V

Model

0.75

3PH／200V

1.5

3PH／200V

YD-4001GVF3

0.75

3PH／200V

YD-4002GVF3

1.1

1.5

3PH／200V

YD-4003GVF3

17-2001.4

2.2

3PH／200V

YD-5002GVF3

1.5

3PH／200V

2.2

1.1

50Hz

Dis.

1.2

28-250

1.6

1.8

3.7

Std. S.G.

25

Std. spec.

Std. S.G.

12-100

1.1

8-80

1.6

12-105

1.8

YD-5003GVF3

40

25

50

40

50

Output（kW）

Voltage（V）

0.75

3PH／200V

1.5

3PH／200V

0.75

3PH／200V

2.0

8-80

10-1101.1

11-1601.6

15-2001.1

17-2501.1

17-2001.4

18-2501.8

15-2001.1

1.5

3PH／200V

16-2001.3

2.2

3PH／200V

1.5

3PH／200V

2.2

3PH／200V

3.7

3PH／200V

17-2501.1

23-3001.1

18-2501.6

3PH／200V

YD-5005GVF3
28-20060Hz

YD-2502GVF3

17-20018-250Suc.

IE3 Standard performance（L/min．- m）

Std. spec.

YD-2501GVF3

2.0

8-80

25

YD-2502GV3

YD-4002GV3

Bore (mm)IE3 Standard performance（L/min．- m）
Outoput（kW）* Limited height of self-priming: 5m(Clear water 20 degrees)* Limited temperature of ued liquid: To 80 degrees
If the product is used for liquid whose temperature
is 60 degrees and over.

3PH／200V

30

30

50Hz

50Hz
25
5003GV3(1.4)

205002GV3
5005GV3

4001GV3

15

THD（m）

THD（m）

20

25

4002GV3
2501GV310
55005GVF3
4002GVF3

105003GV3(1.1)

2500GV1

5003GVF3 (1.1)
2501GVF3

5

20Y6GV1

0

15

100

200

300

400

500

0

Capacity（L/min.）

4001GVF3100

2005002GVF3

5003GVF3 (1.4)

300

400

500

Capacity（L/min.）

40

60Hz

35

60Hz

5005GV3 (1.2)

35

30
30
5005GVF3

THD（m）

THD（m）

25

5003GV3

25
4002GV3

20
2502GV3

15

2501GV3(1.1)

82501GV3 (1.8)

1002502GVF3

5005GV3 (1.6)

200

300

Capacity（L/min.）

4003GVF3

2501GVF3

4003GV3

20Y6GV1

05005GVF3 (1.1)
4002GVF3

10

10
5

15
2501GVF3

2500GV1＊ The data is for clear water at 20℃ andﬂooded suction.
＊Ensure the following min. ﬂow rate during
operation to cool sliding parts.
・Motor output 0.4 〜0.75kW : 10 L/min.
・Motor output 1.5 〜3.7 kW : 20 L/min.

20

400

500

＊ The data is for clear water at 20℃ andﬂooded suction.
＊ Ensure the following min. ﬂow rate during
operation to cool sliding parts.
・Motor output 0.4 〜0.75kW : 10 L/min.
・Motor output 1.5 〜3.7 kW : 20 L/min.

55003GVF3

0

100

200

300

400

500

Capacity（L/min.）9

seriesseriesChemical resistance is much improved by adopting CFR PP as main material!

High self-priming ability!

8005GV: Suction three meters in 1 min30 sec.

The structure which separates gas and liquid eﬃciency cuts self-priming loss andmaximizes the pump ability.

Strong against dry running!
Our original valveless structure leaves self-priming liquid for restart without checkvalves. It is the special structure which is strong against dry running.

20 : 20A

Model

OutputDischarge bore

Y6 : 0.26kw (3PH, 200V)
A6 : 0.26kW (1PH, 100V)
00 : 0.4kW (3PH, 200V)

Main material
Motor type

CP : CFR-PP
Carbon ﬁber reinforced
polypropylene

1 : IE1

O-ring material

S.G.

D : FPME : EPDM

2 : S.G. 1.2
6 : S.G. 1.6

Bearing material

Frequency

R : CFR-PTFE

5 : 50Hz
6 : 60Hz

High performance.
V・60Hz)Max. head 25 meters / Max. Capacity 1,300 L/min. (YD-10010GV・60Hz)
Back pull out system, causing safe and easy maintenance.
No need to worry about liquid leakage for the magnet drive system.
It is strong against taking up liquid.

ID number
N : Our ID code

Resistant to slurry / sludge!
( Impeller wearing)
The slurry / sludge, which can pass through to the rearcasing is only 0.127 mm or less due to the impeller
wearing. It protects the magnet can and rear casing fromabrasion.
* If liquid with slurry is transferred, contact us.
The sliding parts are made of SiC.
(Yellw parts in the left picture)* Only the dimension for 0.26kW is indicated as follows.

The principle of residual Self-priming liquid.
Liguid

Air

Air
Air

Internatioanl
PAT.

JPN, USA, CAN, TWN, GER, FRA,
GBR, NLD, ITA, SWE, DNK

Air

Air

Air
Air

Penetration

Before operation

Before self-priming
Air

Model

Bore
(mm)

3PH 200V

YD-20Y6GV1
YD-20A6GV1
YD-2000GV1
10

Power supply

20A union（G1 thread）

1PH 100V3PH 200V

Limit of S.G.

Std. performance（m-L/min.）
50Hz
60Hz
Std. spec.
Std. spec.

1.2
6 - 301.6

Output（kW）

Weight
（kg）

0.26

10.0

0.4

11.5

7 - 30Limited heightof self-priming(m)
2.5(Clear water:
20 degrees)

Suspension / Siphon cut
Full self-priming

Suspension / Back ﬂow

Liquid ﬂows back after stop the operation, but our original siphon cut structure blocks the liquid quickly and remains enoughself-priming liquid in the casing. Therefore, it is not necessary to pour priming liquid for the second and subsequent times
operation.

11

seriesseriesMotor bracket

Outer magnet
Shaft

Rear casing support

Discharge bore

Output80：80A
100：100A

05：3.7kW
07：5.5kW
10：7.5kW

Frequency

Model
Bearing / Gasket material
Motor type

KP : SiC/FEP+FKM
KE : SiC/EPDM

3：IE3

Bearing

Casing5 : 50Hz
6 : 60Hz＊UV
SUS cover is attached toprotect from UV.

S.G.

1: 1.1＊
2: 1.2＊Only YD-10007GV3 60Hz

Pump material

PP：Polypropylene* Limited temperature of ued liquid: To 80 degrees
If the product is used for liquid whose temperature
is 60 degrees and over.

Bore( Suc.× Dis. )Output( kW )

IE3 Std. performance (L/min - m)

Model

YD-8005GV3

80A×80A

3.7

20-500

YD-10007GV3
YD-10010GV3

100A×100A

50Hz

Weight( kg )

60Hz

Self-priming
limit height (m)Rear casing

Impeller

Gasket110

5.5

14 - 800

12-600(SG1.1)

186

7.5

19 - 800

20 - 600

193

4.0( Clear waterat 20℃ )Material

Part name＊Impeller & Rear casing are subject to the list control. When exporting them, please get the permission from the Minister of Economy, Trade and Industry.
＊The pump is subject to the catch-all control. When exporting it, observe the Export Trade Control Order and process it properly.
＊The catalogue contents are subject to change without notice due to product improvement.

Material

Part nameCasing

PP ＋SUS cover

Rear casing

CFR-ETFE＋Kevlar reinforced

Impeller

CFR-ETFE

Rear casing support

Ductile iron

Bearing

SiC

Outer magnet

Ductile iron＋Rare earth magnet

Shaft

SiC

Motor bracket

Ductile iron

FEP+FKM / EPDM

Motor

Aluminum alloy(FKM is a high chemical resistant gasket
covered with FEP capsule.）

Base

SS400

Gasket
L

E

B

D

C
A

50Hz

M

30

G

H

THD (m)

I

Model

A

B

C

D

E

F

G

H

I

J

K

L

M

N

YD-8005GV3

348

89

437

180

32

57.5

320

320

715

400

440

763.5

9

φ15

380

102

482

211

31

212.5

310

310

850

460

500

908

9

φ15

YD-10007GV3

12

30

8.0
6.0
4.0
2.0
0

H6-φN

20
10010GV3（mm）

YD-10010GV3

10010GV3
10007GV3
8005GV3

THD (m)F

Std. S.G.1.2
Output (kW)10007GV3

8005GV3

8.0
6.0
4.0
2.0
0

Output (kW)10010GV3

J
K

60Hz

Std. S.G.1.2

208005GV3

8005GV3

1010010GV3

1010007GV3

0

250

500

750

1000

Capacity（L/min.）

10007GV3(S.G.1.1)

1250

1500

0

250

500

750

1000

1250

1500

Capacity（L/min.）13

seriesseries2500 〜 5005GV/GVF series

8005 〜 10010GV/GVF series
Installation

Installation

Capable of installing anywhere. Piping horizontally and under strict conditions
are possible.
It is eﬀective to take measures against earthquakes and liquid leakage.
● No need a drain port when pumping up from the top of a tank.

● Possible to install it far from a tank or ﬁlter.

● 5m self-priming ability expands versatility.

● Stringent instal condition has a great reduction.

● For easy gas lock liquid, hazarous liquid, high S.G. liquid.

● Up and down suction piping is possible.

● Long horizontal suction piping is possible.

● No need foot valves.

The pump can be used for all types of installation site such as horizontal suction piping or under stringent conditions. It is also eﬀective totake measure against earthquakes or liquid leakage.
● No need a drain port to evacuate liuid from the top of a tank.
● Installation far from a tank is possible.
● Self-priming ability is four meter.
● The conventional stringent condition is eased dramatically.

● Taking up liquid is possible.
● Up and down piping is possible.
● Long horizontal piping is possible.
● No need foot valves.

※When the suction pipe is long or taking up operation is need, contact us.

Suction ﬂooded

Evacuate from a tank lorry,Up and down piping

Recommended piping
Sluice valve
Pipe support

Air release pipe

Check valve
Sluice valve

1）Caution in installingPressure gauge
Suction pipe Pipe support
Compound gauge（Bore:D）① The air enters from joints of the suction pipe, pumping is disabled and it causes damage.
● The inside of suction pipes during self-priming operation goes into the negarive pressure. Select joints which does not inhale the air.
If the air enters due to installation error, pumping failure occurs because no liuqid goes inside. It may cause the pump breakdown.
● Be the same the bore of the suction pipe and the pumpʼs suction inlet.
If the bore of the suction pipe is bigger, self-priming ability may be decreased, casing pumping failure.

Expansion
joint

Taking up liquid

Pumping up liquid

Priming water plug

Self-priming
height(4 m or less)● Set as the oﬀ level which is double and more than the suction pipe bore.
If the pump is operated in a setting less than double, it cuases dry running for air entrainment.

Drain
plug
Pipe support② Try that dust and foreign objects do not enter into pumps from an inlet.
Pit

If strainers are installed, clean them to prevent clogging periodically and minimize the loss resistance.

500 mm and more

③ It is recommended to place check valves at discharge rising pipes to prevent water hammer as follows. Bypass pipes

Strainer

are also recommended to place down.（No air release pipes may cause self-priming failure.)

2D and more

● The discharge pipe is long and the head is 10 meters and more.
● The tip of the discharge pipe is located nine meters and more higher from the surface of the suction tank.
● Two and more pumps are installed in parallel.

④ Install bendings and expansion joints not to leak liquid due to pump deformation by piping heat expansion.
⑤ Handle them with care not to make an impact, because main parts insdie pumps are made of plastic.
⑥ When self-priming pumps are used for easy foamed liquid which contains surfactant, it is recommended to installfoot valves.
※ When food valves are installed, clean and check them for functional maitenance.

2）Prohibition on evenly tightening and overtightening ﬂanges
Discharge pipe

① Align the pipe ﬂange parallel to the pump ﬂange and do not tighten bolts excessively.

Sluice valve
Pipe support② At the time of plumbing, adjust the assembling dimensions to the pump.
If it is plumbed while not ﬁt in, the pump casing may breakdown.
Moreover, uneven tightening may cause liquid leakage from gaskets.
Tighten it diagonally and evenly.

Air release pipe
Sluice valve

Sluice valve
Pressure gauge

Vacuum gauge
Suction pipe

① Be the same the bore of the discharge pipe as the pumpʼs discharge outlet.
Smaller bore makes the eﬃciency of air release reduce during self-priming operation and the ability is decreased.
Moreover, the ﬂow rate is may decreased due to increaseing the loss resistance of piping.
② Place check valves to prevent water hammer such as following.

Expansion joint3）Prohibition on supplying a load to pipping① Be completely subjected to a piping load by pipe supports.
Pipe support② When the temperature of liquid is high (40℃ and more), install bendings andexpansion joints not to be applied a load to the pump by heat expansion of piping.
14① Be the same the bore of the suction pipe as the pumpʼs suction inlet.
② Make the horizontal length of the suction pipe one meter or less.
If it is one meter and more, self-priming ability is dramatically reduced because air volume in the suction pipe becomes
big, causing the pump breakdown.
③ Submerge the tip of the suction pipe 500 mm and more from the liquid level to prevent air entrainment.
④ When the instal level is lower than the liquid level for up and down piping, attach sluice valves for maintenance.
⑤ Raise the suction pipe to the pump gently not to make the air stay in the pipe.
⑥ Be isolated the air release pip as much as possible from the suction pipe.
⑦ Set as the oﬀ level which is double and more than the suction pipe bore.
If the pump is operated in a setting less than double, it cuases dry running for air entrainment.
⑧ Try that dust and foreign objects do not enter into pumps from an inlet. If strainers are installed, clean them to prevent
clogging periodically and minimize the loss resistance.

Pit

Drain ditch

The suction pipe is long or the head is 10 meters and more.
The tip of the discharge pipe is located nine meters and more higher from the surface of the suction tank.
Two and more pumps are installed in parallel.

③ Place sluice valves to the discharge pipe for maintenance.
④ Place pressure gauges to check operaitonal aspects in a daily check.
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