Principle

Lk063a＜Bimorph vibrator＞ The BIMOR pump·s driving force, the bimorph, comprises two parallel piezoelectric wafers.

Piezoelectric element

V AC＋

Elastic metal plate (Shim)*
0Shrink

Liquid Pump

・ The Bimorph deforms like a bowl when applied with AC
voltage, positive and reverse deformation is achieved byalternating frequency from + to ï.

BIMOR PUMP Series

・ Discharge volume can be adjusted by controlling the numberof amplitude of power supply.
(50 Hz = 50 times / sec. 60 Hz = 60 times / sec.)ïExpand*Elastic metal plate (Shim): Where ceramic is affixed.

ShrinkFlow adjustment methods

Frequently Asked Questions

The flow rate of the piezoelectric pump can be adjusted by the following three methods.

The durability of the pump is affected by thecompatibility between the wetted material and theliquid. Please check to confirm the suitability
against the specfic application/conditions.

Viscosity of liquid
At internal lab test, the flow rate is halved at aviscosity of 30 mPa .s. The viscosity of fluids suchas lubricating oil can change considerably withtemperature.

Pressure - Flow characteristics

1. Narrowing the discharge portor piping
By narrowing the discharge port,
the discharge pressure rises andthe flow rate linearly decreases.
Even if the discharge port is in aclosed condition, the oscillator
amplitude will only decrease andnot burn out like a motor driven
pump.

600
500

Flow［mL/min］

Durability of Piezoelectric pump

400
300
200
100

01020

Self-priming power :3040

Pressure［kPa］

2. Lowering the drive voltage

Voltage - Flow characteristics
600

Total head

Discharge head

The force to pressurize the liquid.
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500
400

5040Flow
Discharge pressure

30300
20200
101000204060800100

voltage［V］*The flow characteristics of 120 V and 240 V models are equivalent.

3. Varying the drive frequency

Frequency - Flow characteristics
50700

The discharge pressure of the bimorph pumpis the measurement value when the suction
head is zero, so the discharge pressure = thetotal head.

The flow rate varies with thefrequency, but the dischargepressure is constant. It is effective
for changing the flow rate withoutbeing affected by dischargepressure. The maximum flow ratevaries depending on model, but itoccurs at about 100 to 120 Hz.

600

Flow［mL/min］

Piezoelectric
pumpDischarge pressure［kPa］

Dischage pressure :Flow［mL/min］

The flow rate and dischargepressure linearly decrease withthe voltage drop. Please do not
exceed the rated voltage since
the thickness of the piezoelectricelement is designed close to thewithstand voltage.

40
500
30

400
300

20200

Flow
Discharge pressure

100

10Discharge pressure［kPa］

The power the pump requires to draw water.
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Suction head

UtilizinggaP
Piezo-ElectricocBimorph
mo ph too reachchhw Standards
d d in Pumping
P p g TechnologyT hyNew

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4060

80

100120BPS/BPH/BPHS/BPF type
Principle/Structure
Driving power: Piezoelectric Bimorph Bending

Frequency［Hz］

Suction

NITTO KOHKI CO., LTD.
Web

www.nitto-kohki.co.jp/eHead Office9-4, Nakaikegami 2-chome, Ohta-ku, Tokyo 146-8555, Japan
Tel : +81-3-3755-1111
Fax : +81-3-3753-8791
E-mail : overseas@nitto-kohki.co.jp

Discharge

ApplicationsISO9001

JQA-2025
ISO14001
ISO 9001
ISO 14001

JQA-EM4057
H.Q./R&D Lab

DISTRIBUTED BY・ For water supply and drainage
・ For cooling water circulation
・ For chemical injection
・ For liquid sampling

Outlet Valve

Inlet Valve
Piezoelectric Bimorph
This catalog is printed using environmentally friendly paper and vegetable oil inks.

Specifications and designs are subject to change at any time without notice.

Printed in Japan

19LX00- 1-Piezoelectric Pump series -Specifications

Revolutionary piezoelectric bimorph technology-Piezoelectric Pump series -240V models are newly redesined.
The flow rate is increased by about 160 %.
Voltage(AC)ModelCurrent(mA)

120 V 60 Hz

Self-priming
Pressure(kPa)

Voltage(AC)Discharge
Pressure(kPa)

Flow Rate(mL/min)

ModelCurrent(mA)

240 V 60 Hz

Self-priming
Pressure(kPa)

Flow Rate(mL/min)Material of Wetted Parts
Discharge
Pressure(kPa)

Housing

WeightLiquidValve / O-ring(g)Contact Sheet

BPS-215i

333015Ɏ

ɎɎ

ɎɎ

PPPP

IIR

40

BPH-214E

15835018

BPH-214E

7.5

8350

18

PP

PP

EPDM

140

BPH-214G

15735017

BPH-214G

7.5

7350

17PPPTFE

FKM140

BPH-414E

301250035Ɏ

ɎɎ

Ɏ

Ɏ

PP

PP

EPDM

140Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPH-474G

151040035PPSPTFE

FKM

170

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPH-474P

151040035PPSPTFE

FFKM/FEP

170

The BIMOR pump's driving force, the bimorph, comprises twoparallel piezoelectric wafers. Their nature is to expand or contract
depending on the direction of the voltage. Therefore when an
alternating current is applied, one wafer expands then contracts
while the other contracts then expands, causing the bimorph tobend. Repeating the cycle creates the pumping action.

BPS type

BPF type[Cross section]
Check valves
O-ringBPHS-414i/E/G

Bimorphvibrator

Made to order models
These models are made-to-order models.
Please send a request for quotation to your nearest distributor.

BPH tytype

O-ringLiquid contact sheet

Elastic mold

BPHS-474G/P

Specifications
Voltage(AC)Model

Current(mA)

120 V 60 Hz

Self-priming
Pressure(kPa)

Flow Rate(mL/min)

Voltage(AC)Discharge
Pressure(kPa)Model

240 V 60Hz

Current Self-priming
Pressure(mA)(kPa)

Flow Rate(mL/min)Material of Wetted Parts
Discharge
Pressure(kPa)

Housing

WeightLiquidValve / O-ring(g)Contact SheetɎ

Ɏ

Ɏ

Ɏ

Ɏ

BPS-215i

1.8

33015

PP

PP

IIR

40

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPS-235G

1.8

1.53015

POM

PTFE

FKM

40

BPH-214i

15835018

BPH-214i

7.5

8350

18

PP

PP

IIR

130

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPH-214D

7.5

8350

18

PP

PP

VMQ

130

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPH-414i

1512500

35

PP

PP

IIR

140

BPH-414D

30

12500

35

BPH-414D

1512500

35

PP

PP

VMQ

140

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPH-414E

1512500

35

PP

PP

EPDM

140

BPH-414G

301045032

BPH-414G

151045032

PPPTFE

FKM

140

BPH-474G

301040035ɎɎɎɎɎ

PPSPTFEFKM

170

BPH-474P

301040035ɎɎɎɎɎPPSPTFE

FFKM/FEP

170Ɏ

ɎɎɎɎ

BPHS-414i

151270035

PP

PPIIR

160

Ɏ

ɎɎɎɎ

BPHS-414E

1512700

35

PP

PPEPDM160

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPHS-414G

151270035

PP

PTFE

FKM

160

Ɏ

Ɏ

Ɏ

Ɏ

Ɏ

BPHS-474G

1510500

35

PPS

PTFE

FKM

180

Ɏ

ɎɎɎɎ

BPHS-474P

1510500

35

PPS

PTFE

FFKM/FEP

180

BPF-465P

301040035

BPF-465P

1510400

35PFA

PTFE

FFKM/FEP

350

Material Description
EPDM
FEP
FFKM
FKM
IIR
PFA
POM
PPPPS
PTFE
VMQ

The meaning of each letter inthe model name

Ethylene Propylene Rubber
Fluoroethylene Propylene
Perfluoroelastomer
Fluorine Rubber
Butyl Rubber
Fluororesin (Perfluoroalkoxy)
Polyacetal
Polypropylene
Polyphenylene Sulfide
Tetrafluororesin(Polytetrafluoroethylene)

BP H

Rubber material (Valve, O-ring)S : Small type
H : Dismantlable type
F : Chemical-resistant type
HS : High flow type

Pump type
Diaphragm type
2: Single
4: Double

Condition of Use
5 to ʝ *1

Ambient humidity

35 to 85％ *2Fluid temperature

5 to ʝ

i : Butyl Rubber (IIR)
D : Dimethyl Silicon Rubber (VMQ)
E : Ethylene Propylene Rubber (EPDM)
G : Fluorine Rubber (FKM)
P : Perfluoroelastomer (FFKM)

Pump type

Dimethyl Silicon Rubber

Ambient temperature

4 1 4 D

4: Dismantlable type
5: Chemical-resistant type and small type

Housing material*1) No Freezing*2) No condensation

1: Polypropylene (PP)
2: Polyacetal (POM)
6: Fluororesin (Perfluoroalkoxy) (PFA)
7: Polyphenylene Sulfide (PPS)

How to install

Attention

Please install the pump to a flat side.

BPS type
When installing, make sure the outlet
is at the top and the inlet is at thebottom.

Depending on the direction of installation,
sufficient performance may not be obtained.

OutletIN O

BPH,BPHS,BPF typeInstall the pump so that the IN / OUT
display is in the correct orientation.

UT

Inlet
BPS typee.g. :If installed on the bottom of adevice, the performance may
deteriorate.

BPH, BPHS, BPF type

Suitable/unsuitable chemical liquids
Model

Examples of suitable chemical liquids

Examples of unsuitable chemical liquids

BPS-215i
BPH-214i
BPH-414i
BPHS-414i

Ethanol,Dilute hydrochloric acid,
Sodium carbonate,Benzaldehyde,Formalin

BPH-214E
BPH-414E
BPHS-414E

Ammonia water, Ethanol, Dilute hydrochloric acid,
Caustic potash, Caustic soda, Methanol

BPS-235G

Ethanol, Xylene, Silicone oil, Kerosene,Toluene, Benzene

Ammonia water, Hydrochloric acid,
Hydrogen peroxide, Sodium hypochlorite,
Nitric acid, Sulfuric acidBPH-214D
BPH-414D

Ammonia water, Ethanol, Sodium hypochlorite,
Methanol

Caustic soda, Carbon tetrachloride, Silicone oil,
Trichloroethylene, Toluene, Benzene

BPH-214GBPH-414G
BPHS-414G

Ethanol, Hydrogen peroxide, Mineral oil,
Sodium hypochlorite

Acetone, Ammonia water, Glacial acetic acid,
Hydrofluoric acid, Formalin

BPH-474G
BPHS-474G

Ethanol, Xylene, Carbon tetrachloride,
Silicone oil, Trichloroethylene

Acetone, Ammonia water, Chlorosulfonic acid,
Glacial acetic acid, Hydrofluoric acid, Formalin

BPH-474P
BPHS-474P

Ethanol, Chloroform, Glacial acetic acid,
Benzene, Methyl ethyl ketone

Chlorosulfonic acid, Fluorine oil,
CFC 112, CFC 113

BPF-465P

Ethanol, Aqua regia, Ozone, Carbon tetrachloride,
Concentrated nitric acid, Concentrated sulfuric acid,
Fuming sulfuric acid

Fluorine oil, CFC 112, CFC 113

Xylene, Mineral oil, Carbon tetrachloride,
Trichloroethylene, Toluene, Benzene