1.
FC VACUUM SWITCHES
Large Flamepaths
for better safety
Seperate Terminal block
for safe wiring
Internal ground screw
Robust Snap action
microswitches for
reliable switching
Lock Screw for
stable set-points
Cover chained to
main body
Large Springs
for finer set-points
Nonmetallic diaphragms
for minimal drift
Large Sensing area
for better sensitivity
Approximate Weight :
Vacuum switches with Aluminium enclosure
Vacuum switches with Grey CI enclosure
Vacuum switches with SS enclosure
: 2.03 Kg.
: 4.43 Kg.
: 4.56 Kg.
Electrical Connection :
Z 2 3
1
SomeApplications :
Used in filters, vacuum pumps, blower systems, etc.

2.
VACUUM SWITCHES FC
PRESSURE CAPSULE DETAILS
6
5
4
3
2
1
No. Description
1. Disc
2. Diaphragm
3. Plunger (SS316)
4. Junction Plate
5. Sealing O-Ring (Teflon®)
6. Sealing diaphragms (Teflon®)
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0
(5.71)
126.0
(4.96)
110.0
(4.33)
Cable Entry 26.0
1/2" NTP(F) (Options Avail.) (1.02)
Ø7 (Ø 0.27), Mounting
Holes, 2nos
34.5
(1.36)
Vacuum Port
1/4" BSF(F)
Ø5 (Ø0.20) Hole (to be always
open to atmosphere) APPROX. DIMENSIONS IN
inches
.

3.
FC VACUUM SWITCHES
RANGE SELECTION TABLE
Range Code Range
mm Hg (" Hg)
Differential* mm Hg ("Hg) Maximum
Working Pressure
bar (psi)
Approximate
Maximum
for "A1"
microswitch
V00
† 760 - 100
(29.92 - 3.94)
10
(0.39)
12
(174.05)
*Minimum differential increases with set point (Graphs available on request)
† Typical values achieved at sea level, total vacuum that can be achieved varies mainly with altitude.
*Please indicate specifically the differential value in enquiry/order, when it is critical in your application.
NK Instruments Pvt. Ltd.B-501/504, 5th floor, Raunak Arcade, Near THC Hospital, Gokhale Road, Naupada,
Thane(W) 400602. Maharashtra INDIA Telefax Nos.: 91-22-25301330 / 31 / 32
E-Mail: sales@nkinstruments.com Web: http://www.nkinstruments.com
Skype: nitinkelkarskype Gtalk: nkinstruments2006
Authorised Dealer

4.
VACUUM SWITCHES FC
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NK Instruments Pvt. Ltd.B-501/504, 5th floor, Raunak Arcade, Near THC Hospital, Gokhale Road, Naupada,
Thane(W) 400602. Maharashtra INDIA Telefax Nos.: 91-22-25301330 / 31 / 32
E-Mail: sales@nkinstruments.com Web: http://www.nkinstruments.com
Skype: nitinkelkarskype Gtalk: nkinstruments2006
Authorised Dealer