PA5
Pressure switch for
pumps and autoclaves
with adjustment range
from 1 to 5 bar.
0402202 1/4” 250V
single phase
0402105 1/4” 500V
three phase
Part No. Size Power
PA12
Pressure switch for
pumps and autoclaves
with adjustment range
from 2 to 12 bar.
0402206 1/4” 250V
single phase
0402205 1/4” 500V
three phase
Part No. Size Power
The pressure switch automatically controls operation of
the motor-driven pump according to given set pressures.
When the minimum set pressure is reached, the contacts
are closed, therefore the motor is started. Reaching of the
max. set pressure determines, instead, the opening of the
contacts, hence the motor is stopped.
APPLICATION AND OPERATION
Fully loosen differential adjusting nut (1). Turn range adju-
sting nut (2) until obtaining the required closing valve for
the contacts. Tighten differential adjusting nut (1) until the
required cut-off pressure is obtained.
ADJUSTMENT OF SET PRESSURE
Contact (b) - (c) is normally closed (it opens when the
set pressure is reached). Connection to earth is via
terminal (a).
View of the terminal board from above after removing the
cover:
ELECTRICAL CONNECTIONS
Product PA5, 250 V:
- conforms with European Standard EN 61058-1
- is approved by VDE, SETI, SEMKO, DEMKO, NEMKO, CSA.
Product PA12, 250 V:
- is NEMKO approved
CE mark in conformity with European Directives EEC 89/336, EEC 73/23.
APPROVALS
Overall dimensions (mm)
a
b
c
2
(a) earth terminals
(b) line terminals
(c) motor terminals
DESIGN FEATURES
Connection
1/4" F
Inner cable gland diameter
11.5 mm max. (for cables H07RN-F-3X1)
Lever mechanism
galvanized steel
Electrical contacts
brass faced with Ag-CdO
Diaphragm
NBR rubber with fabric core
Cover
high impact ABS
TECHNICAL CHARACTERISTICS
Model
PA5
PA12
Contact load rating
16(10)A
16(10)A
a 250 V ~
a 250 V ~
Pressure setting range
1 ÷ 5 bar
2 ÷ 12 bar
Minimum differential
0,5 bar
1,5 bar
Maximum differential
2,5 bar
4 bar
Factory setting (closing)
1,4 bar
5 bar
Factory setting (opening)
2,8 bar
7 bar
Max. fluid temperature
90°C
90°C
Degree of protection
IP 44
IP 44
