We have Orion brand DP Switches. The DP Switches are also known as PD Switches, Differential Pressure Switches, Pressure Difference Switches.

1. FC HIGH PROOF HIGH RANGE PRESSURE DIFFERENCE 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 :
Pressure difference switches with Aluminium enclosure : 2.43 Kg.
Pressure difference switches with Grey CI enclosure : 4.93 Kg.
Pressure difference switches with SS enclosure : 5.13 Kg.
Electrical Connection :
Z 2 3
1
SomeApplications :
Applications requiring high static/system pressure but low pressure difference.

2. HIGH PROOF HIGH RANGE PRESSURE DIFFERENCE SWITCHES FC
PRESSURE CAPSULE DETAILS
1 6
2 7
3 8
4
5 9
Note : wetted parts are mentioned in italics. 10
INSTALLATION DRAWING 145.0
110.0 (5.71)
(4.33) 126.0
26.0 (4.96)
(1.02)
No. Description
1. Sealing Diaphragm (Teflon)
2. Sealing O Ring (Teflon)
3. Disc
4. Sealing O Ring
5. HP Plunger
6. LP Plunger
7. O Ring
8. Diaphragm
9. Csk. Screw (S.S.)
10. Pressure Housing
CABLE ENTRY
1/2" NPT(F)
(Options Avail)
Ø7, MOUNTING HOLES
2 NOS
A/F 22
(A/F 0.86) LOW PRESSURE PORT
1/4" BSP(F)
HIGH PRESSURE PORT
1/4" BSP(F) APPROX. DIMENSIONS IN
inches

3. 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
FC HIGH PROOF HIGH RANGE PRESSURE DIFFERENCE 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)
0.24
(3.48)
200
(2900.76)
P02
0.1 - 1.5
(1.45 - 21.76)
0.40
(5.80)
200
(2900.76)
P03
0.2 - 2.6
(2.90 - 37.71)
0.40
(5.80)
200
(2900.76)
P04
0.2 - 3.6
(2.90 - 52.21)
0.60
(8.70)
200
(2900.76)
*Minimum differential increases with setpoint (Graphs available on request)
* Note :
Microswitches A2 through A9 can be supplied in some ranges and differentials will vary with microswitch used.
Please contact sales office for details. Please check availability of adjustable differential with sales office.

4. 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
HIGH PROOF HIGH RANGE PRESSURE DIFFERENCE SWITCHES FC
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Continuous efforts for product development may necessitate changes in these details without notice