Flameproof Vacuum Switch is designed as per IS2148 for Gas Gr. IIC Flameproof - CE Certification and approved by a leading European Lab – “BASEEFA” for ATEX & ICEEX certificates Adjustable Range : 760 to 100 mm Hg Vacuum Diaphragm : Teflon or, Neoprene Pressure Housing MOC : Aluminium, Brass or, SS 316

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
Con nuous efforts for product development may necessitate changes in these details without no ce
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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