Orion Instruments MD-MT, a high-range DP (differential pressure) switch, offers precise pressure measurement and control. It boasts an impressive pressure range of 0.1 to 600 bar, making it suitable for various industrial applications. The MD-MT switch stands out with its rugged construction, featuring an IP66-rated enclosure, ensuring protection against dust and water. Its versatile design allows for easy installation with multiple cable entry options, including ½" NPT, ¾" NPT, and M20 x 1.5 threads.
75
Bulletin No. KA220802
MT High Range DP
CATALOGUE
Website : http://www.orion-instruments.io
Kaustubha Udyog AN ISO9001:2008 COMPANY
S. No. 36/1/1, Sinhgad Road, Vadgaon Khurd,
Near Lokmat Press, Pune 411 041 INDIA
Tel.
Telefax
Email
: +91-(0) 20-24393577 / 24393877
: +91-(0) 20-24393577 / 25460486
PRESSURE SWITCHES
PRESSURE DIFFERENCE SWITCHES
VACUUM SWITCHES
From 1.5 mbar to 600 bar
Certificate No.: FM72815
1
75
MD
INSTALLATION DRAWING
APPROX. DIMENSIONS IN mm
inches
PRESSURE CAPSULE DETAILS
Note : wetted parts are mentioned in italics.
Description
Pressure Housing (SS)
Diaphragm ®
(SS or PTFE )
Plunger (SS)
O-Ring (Viton)
Disc (Al)
No.
1.
2.
3.
4.
5.
1
2
3
4
5
MD/MT
HIGH RANGE DP
62
71
20
112.5
130.0
147.0
78
(5.78)
(5.11)
(4.43)
(2.44)
(3.07)
(2.79)
(0.78)
37
(1.45)
L
30
(1.18)
161
(6.33)
Set Screw Cap
Mounting Holes
2 Nos, Ø6.5
0.25
High Pressure Port Low pressure Port
Cable Entry
1/2" NPT Threads
(Options Available)
Pressure port
1/4" BSP (F)
Bulletin No. KA220802
2
MT
MD/MT
HIGH RANGE DP
PRESSURE CAPSULE DETAILS
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
APPROX. DIMENSIONS IN mm
inches
1
4
5
2
3
Description
Pressure Housing (SS)
Diaphragm ( ®
PTFE )
Plunger (SS)
O-Ring (Viton)
Disc (Al)
No.
1.
2.
3.
4.
5.
98 130
51
87
165
31
149
48
(3.85)
Cable Entry
51
1/2"NPT (F) or M20x1.5
50.8 Sq.
High Pressure Port
1/4" NPT (F)
1/4" NPT (F)
Low Pressure Port
Mounting Holes
2 Nos.
(5.86)
(5.11)
31
(6.49)
(3.42)
(2.0)
(1.22)
(2.0)
(1.22)
(1.88) (2.0)
Ø7.0
(0.27)
*Pressure ports are brazed with flange
Bulletin No. KA220802
3
MD/MT
HIGH RANGE DP
RANGE SELECTION TABLE
D01
D02
D03
D04
D07
D10
D15
D30
0.1 - 1.0
(1.45 - 14.50)
0.2 - 1.5
(2.90 - 21.76)
0.2 - 2.6
(2.90 - 37.71)
0.2 - 3.6
(2.90 - 52.21)
0.5 - 7.0
(7.25 - 101.50)
0.5 - 10.0
(7.25 - 145.04)
1.0 - 15.0
(14.50 - 217.71)
5.0 - 25.0
(72.52 - 362.6)
Differential* bar (psi)
70
(1015.26)
70
(1015.26)
70
(1015.26)
70
(1015.26)
70
(1015.26)
70
(1015.26)
70
(1015.26)
70
(1015.26)
Range Code Range
bar (psi)
Maximum
Working Pressure
bar (psi)
0.12
(1.74)
0.20
(2.90)
0.20
(2.90)
0.40
(5.80)
0.80
(11.60)
1.00
(14.50)
1.50
(21.75)
2.00
(29.00)
Approximate
Maximum
for "A1"
microswitch
Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are
approximate maximum for FSR. The differential value will vary according to the pressure range selected and
microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same
point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off
differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate
DPDT relay. This relay will need a separate power supply for it’s coil.
Bulletin No. KA220802
4
MD/MT
HIGH RANGE DP
HOW TO ORDER INDUSTRIAL HIGH RANGE DP SWITCHES
Non standard
allocation
Model Cable Entry Size Switch Type Range Code
(values in bar)
Microswitch
Type
Diaphragm
Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 8Group 7
Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 8Group 7
MD 1 DF1 D01 A1 0
S1
Reserved for
non-standard
options not
covered in
catalogue. Will
be given by
manufacturer,
only after
agreement of
supply details
with customer.
Please specify full model number to avoid ambiguity.
eg. A high range pressure difference industrial switch, with ½" NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 0.1 bar to 1 bar
pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by
D01 =
(0.1 - 1.0)
D02
(0.1 - 1.5)
D03 =
(0.2 - 2.6)
D04 =
(0.2 - 3.6)
D07 =
(0.5 - 7.0)
D10 =
(0.5 - 10.0)
D15 =
(1.0 - 15.0)
D30 =
(5.0 - 25.0)
S1 =
SS316 /
¼" BSP(F)
S2 =
SS316 /
¼” NPT(F)
H1 =
Hastelloy C / ¼"
BSP(F)
H2 =
Hastelloy C / ¼”
NPT(F)
N1 =
Monel / ¼" BSP(F)
N2 =
Monel / ¼” NPT(F)
Pressure Port
Material / Size
DF1 = pressure
difference switch,
fixed differential
without scale
DF2 = pressure
difference switch,
fixed differential with
scale in bar
DF3 = pressure
difference switch,
fixed differential with
scale in psi
*DA1 = pressure
difference switch,
adjustable differential
without scale
*DA2 = pressure
difference switch,
adjustable differential
with scale in bar
*DA3 = pressure
difference switch,
adjustable differential
with scale in psi
More options available.
Please contact
sales office.
For additional
wetted parts
please contact
sales office
0 =
Neoprene
1 =
PTFE
2 =
SS 316L
3 =
Hastelloy C
4 =
Monel
*Available with A6,
A9 & B9
(in group 6) only
MD =
Industrial
pressure switch
with IP66 rated
enclosure as per
IS/IEC 60529
MT =
Industrial
pressure switch
with IP66 rated
enclosure as per
IS/IEC 60529
1 = Al. enclosure
½” NPT threads
*2 = Al. enclosure
¾” NPT threads
3 = Al. enclosure
M20 X 1.5 threads
7 = SS enclosure,
½” NPT threads
*8 = SS enclosure,
¾” NPT threads
9 = SS enclosure,
M20 X 1.5 threads
*Not available
for MT model
For dual cable entry
contact Sales Office
A1 = General
purpose
microswitch, rated
at 15 A; 250 VAC
*A6 = Adjustable
deadband
*A7 = 2SPDT
switching elements
*A8 = General
purpose microswitch
*A9 = General
purpose microswitch
*B7 = 2SPDT
Switching Elements
*B9 = 2SPDT
Switching Elements
for adjustable
differential
* For detailed
specifications of
microswitches, please
refer note under
Range Selection Table
Bulletin No. KA220802
5
1
2
3
4
5
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