Flameproof Pressure Switches are designed as per IS2148 for Gas Gr. IIC Flameproof - CE Certification and approved by a leading European Lab – “BASEEFA” for ATEX & ICEEX certificates Various Ranges : from 0 to 150 mm Wc upto 0 to 400 Bar Differential (Dead Band) : Fixed (Within 10% of set value) Or, Adjustable Sensing Element : Diaphragm (PTFE, Neoprene or, SS 316) or Piston Enclosure : Flameproof to group IIC

1. FC HIGH PROOF HIGH RANGE SWITCHES
Large Flamepaths
for better safety
Seperate Terminal block
for safe wiring
Cover chained to
main body
Internal ground screw
Robust Snap action
microswitches for
reliable switching
Lock Screw for
stable set-points
Large Springs
for finer set-points
Nonmetallic diaphragms
for minimal drift
Large Sensing area
for better sensitivity
Approximate Weight :
Pressure switches with Aluminium enclosure : 1.87 Kg.
Pressure switches with Grey CI enclosure : 4.27 Kg.
Pressure switches with SS enclosure : 4.42 Kg.
Electrical Connection :
Z 2 3
1
SomeApplications :
High pressure gas handling systems, fire fighting systems where the maximum pressure is high and the tripping value
is low.
26

2. HIGH PROOF HIGH RANGE SWITCHES FC
PRESSURE CAPSULE DETAILS
5 No. Description
1. High Pressure Port
4 2. Housing Plate
3 3. Teflon® O-Ring
4. Diaphragm
2
5. Conical Plunger
Note : wetted parts are mentioned in italics.
1
INSTALLATION DRAWING
145.0
(5.71)
126.0
(4.96) CABLE ENTRY
1/2" NTP(F)
(Options Avail.)
110.0
(4.33)
26.0
(1.02)
Ø7 (Ø 0.27), Mounting
Holes, 2nos
PRESSURE PORT
1/4" BSPF
Std.(Options Avail.)
(A/F 0.74)
APPROX. DIMENSIONS IN
inches

3. FC HIGH PROOF HIGH RANGE SWITCHES
RANGE SELECTION TABLE
Range Code Range bar (psi) Differential* bar (psi) Maximum Working
Pressure bar (psi)Approximate
Maximum
for "A1"
microswitch
P01
0.1 - 1.0
(1.45 - 14.50)
0.20
(2.9)
70
(1015.26)
P02
0.1 - 1.5
(1.45 - 21.76)
0.20
(2.9)
70
(1015.26)
P03
0.2 - 2.6
(2.90 - 37.71)
0.30
(4.35)
70
(1015.26)
P04
0.2 - 3.6
(2.90 - 52.21)
0.40
(5.80)
70
(1015.26)
P07
0.5 - 7.0
(7.25 - 101.50)
0.50
(7.25)
70
(1015.26)
P10
0.5 - 10.0
(7.14 - 142.86)
0.80
(11.6)
70
(1015.26)
P15
1.0 - 15.0
(14.29 - 214.29)
1.50
(23.2)
70
(1015.26)
P30
5.0 - 25.0
(71.43 - 357.14)
1.50
(23.2)
70
(1015.26)
*Minimum differential increases with setpoint, values with neoprene diaphragm (Graphs available on request)
* Differentials of miroswitches A2 through A9 will vary. Differentials for A7 are typically twice that for A1 microswitch.
Please indicate specifically the differential value in enquiry/order, when it is critical in your application.

4. HIGH PROOF HIGH RANGE SWITCHES FC
OWTOOEFLEPOOFIGPOOFIGGEPESSESWITES
st
ct
EtySzStcTy
vs
cstc
Ty
GoupGoupGoupGoupGoupGoupGoupGoup
P=
..
P
..
P=
..
P=
..
P=
..
P=
..
P=
..
P=
..
GoupGoupGoupGoupGoupGoupGoupGoup
FPPAS
Psscfyfmmrtvmty.
=
=
SS
=
tt
=
=
=
=
=
=
=
F=
Ff
ssstc,
ATEx&IEEx
v,t
A
sIS/IE
fGs
G.II
svf
st
tst
cv
ct.W
vy
fct,
yft
tf
syts
tcst.
=A.
½"PTts
=A.
¾"PTts
=A.
x.
ts
=GyI
½"PT
ts
=GyI
¾"PT
ts
=GyI
x.
ts
=SS½"
PTts
=SS
¾"PT
ts
=SS
x.
ts
PssPt
t/Sz
S=
SS/¼"BSPF
S==
SS/¼PTFTf
P=
ssstc,
fxfft
ttsc
P=
ssstc,
fxfft
tsc
P=
ssstc,
fxfft
tscs
Continuous efforts for product development may necessitate changes in these details without notice