１
1. Product Outline
1.1 Purpose of Use and Prohibitions
This product is a dry vacuum pump which employs reciprocating motion of a rubber diaphragm
for vacuum discharge.
Observe the following prohibitions to ensure normal operation of the pump.
Prohibitions
(1) This pump employs only vacuum operation, and must not be pressurized.
(2) Do not re-sell, repair, or modify this pump without the approval of the manufacturer.
(3) This pump is not designed to be corrosion-proof. Use it only with clean air at normal
temperature, or gases of equivalent characteristics.
(4) Do not attempt to discharge gases containing particles, dust, water, or corrosive
gases.
(5) Do not operate the pump for long periods at near-atmospheric pressure.
1.2 Specifications
Table 1.1 Product Specifications (50/60 Hz)
1.3 Thermal Protector
1) This pump is fitted with an automatic reset thermal protector for overload protection. This
device shuts off the motor power supply circuit automatically to prevent burn-out if the motor
temperature rises due to a pump fault which prevents rotation, or if load becomes excessive.
Operating temperature : 120±5°C
2) It is recommended that additional protective devices (e.g. earth leakage breaker, motor
breaker) be fitted.
Model
DA-121DC DA-121DD DA-121DE
DA-121DF
DA-241SC DA-241SD DA-241SE
DA-241SF
Motor
AC100V
(±10%)
AC115V
(±10%)
AC200V
(±10%)
AC220-230V
(±10%)
AC100V
(±10%)
AC115V
(±10%)
AC200V
(±10%)
AC220-230V
(±10%)
Single phase,400W,4P,with condenser-run,
thermal protector (automatic reset)
Rated current (A)
4.8/5.8
4.2/5.0
2.5/3.0
2.3/2.6
-2.3/2.5
5.2/6.0
4.6/5.2
2.6/3.1
2.5/2.7
-2.4/2.6
Speed (rpm)
1450/1700 1450/1720 1450/1700
1450/1720
-1450/1720
1450/1700 1450/1720 1450/1700
1450/1700
-1450/1700
Discharge rate
(L/minute)
120/145
240/260
Ult.P.(kPa)
3.3
16.0
Noise level
(dB(A))
70 or less
（
Ultimate pressure at 1m.
）
Inlet and outlet
piping
O.D.
φ
16
×
I.D.
φ
12(G1/2)
Weight (kg)
26.0
Air temperature
(°C)
0
～
40
Dimensions (mm)
193.5(W)
×
411(L)
×
285(H)
207(W)
×
411(L)
×
285(H)
Excess Voltage
Category
Ⅱ
Pollution Degree
2
Installation
Category
Class 1
Installation
features
Indoor use only
!
Warning
!
Note
