Website : www.orion-instruments.com
Kaustubha Udyog
(Orion Instruments)
S. No. 36/1/1, Sinhgad Road, Vadgaon Khurd, Pune 411 041 INDIA
Tel.: +91-(0) 20-24393877
Telefax : +91-(0) 20-24393577 / 25460486
Email : [email protected] / [email protected]
Certificate No.: FM72815
BULLETIN NO. : KA170306
INSTALLATION AND OPERATING INSTRUCTIONS
KU Pressure Switches
Construction:
KU series pressure switches are housed in pressed steel powder coated enclosure and are recommended for panel mounting or indoor
service. The repeat accuracy is better than +/-1.5 % FSR. Pressure port is 1/4” BSPM standard.
Principle of Operation:
The pressure in the pressure capsule is converted into force by means of a reinforced rubber diaphragm and a calibrated piston, which is
balanced by a compression spring from above. When the force generated by the pressure in the pressure capsule exceeds/falls beyond
the balancing spring force, an electrical element is actuated through a bell crank lever mechanism for accurate switching.
Please use the pressure switch well within the pressure and also the electrical parameters
Mounting
The pressure switches can be mounted in any direction.
a) Pressure switches can be mounted directly in case the mounting is rigid.
b) For panel mounting, Please use M4 bolts of appropriate length through the mounting holes . If the equipment is subject to vibration,
please use rubber washers / pads between the panel and the switch.
Connect the pressure tubing to the pressure port. The pressure port size is generally 1/4" B.S.P. Male, unless specially ordered
otherwise. Other sizes can be obtained via adaptors.
Electrical Connections
Please use electrical loads well
within the limits specified for the
microswitch.
Wiring:
Please refer figure 2.
a) Remove the cover.
b) Pass the cable through the cable
bush (usually provided with the
switch) and connect the wiring as
per the wiring diagram.
The wiring code is as per the details
given below.
Terminal 1 : (C) Common
Terminal 2 : (NC) Normally Closed
Terminal 3 : (NO) Normally Open
Please disconnect supply before wiring the switch, or removing the wiring. The cover should not be removed, if the supply is on.
APPROX. DIMENSIONS IN
mm
inches
INSTALLATION DRAWING
Fig 1.1
(0
.9
0)
23
Pressure Port
(3.26)
83
(0.35)
9
17
.5
(0
.6
8)
33
.5
(1
.3
1)
12
(0
.4
7)
(0.94)
24
1/4" BSP(M)
Cable Entry
12
.5
(0
.4
9)
6
0
.5
(2
.3
8
)
Ø5, Mtg. Holes, 3 Nos.
(0.19)
Set Screw
Differential Screw
(1.75)
44.5
(0.82)
21
9
7
.5
(3
.8
3
)
Fig. 1.2
Z
2
3
1
