Orion INSTRUMENTS MT Series Hydraulic Diaphragm Switch Instruction Manual

MT Series Hydraulic Diaphragm Switch
Instruction Manual MD/MT
HYDRAULIC DIAPHRAGM SWITCH
MT

MT Series Hydraulic Diaphragm Switch

PRESSURE CAPSULE DETAILS

Note : wetted parts are mentioned in italics.
*Pressure ports are brazed with flange

INSTALLATION DRAWING

MD/MT HYDRAULIC DIAPHRAGM SWITCH
RANGE SELECTION TABLE

Range Code| Range bar (psi)| Differential* bar (psi)
Approximate Maximum
for “A8” microswitch| Maximum
Working Pressure bar (psi)
---|---|---|---
H1T| 0.5 – 10
(7.25 – 145.04)| 1
(14.50)| 150
(2175.51)
H2T| 2 – 20
(29.00 – 290.07)| 2
(29.00)| 200
(2900.76)
H4T| 5 – 40
(72.52 – 580.15)| 5
(72.52)| 200
(2900.76)
H1H| 10 – 100
(146.04 – 1450.38)| 12
(174.05)| 200
(2900.76)
H2H| 7 – 200
(101.52 – 2900.76)| 24
(348.09)| 400
(5801.52)
H4H| 40 – 400
(580.15 – 5801.52)| 50
(725)| 500
(7251.88)
H7H| 70 – 700
(1015.26 – 10152.64)| 70
(1015.26)| 800
(11603)
H1K| 100 – 1000
(1450.37 – 14503.77)| 100
(1450.37 )| 1100
(15954.15)

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.
   Note: Welded diaphragm also available as shown

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.

HOW TO ORDER INDUSTRIAL HYDRAULIC DIAPHRAGM RANGE PRESSURE SWITCHES

Group 1| Group 2| Group 3| Group 4| Group 5| Group 6| Group 7| Group 8
---|---|---|---|---|---|---|---
Non standard
allocation| Gas Group
Classification| Cable Entry Size| Switch Type| Range Code
(values in bar)| Microswitch
Type| Pressure Port
Material / Size| Diaphragm
Reserved for non-standard
options not covered in
catalogue. Will be given by
manufacturer, only after
agreement of supply details with customer| 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 IA” NPT threads
2 = Al. enclosure %” NPT threads
3 = Al. enclosure M20 X 1.5 threads
7 = SS enclosure, %” NPT threads
8 = SS enclosure, %” NPT threads
9 = SS enclosure,
M20 X 1.5 threads
Not available
for MT model
For dual cable entry
contact Sales Office| PF1 = pressure switch, fixed differential without scale
PF2 = pressure switch, fixed differential with scale in bar
PF3 = pressure switch, fixed differential with scale in psi
PA1 = pressure switch, adjustable differential without scale
PA2 = pressure switch, adjustable differential with scale in bar
PA3 = pressure switch, adjustable differential with scale in psi
Available with A6, A7, A9 & B9
(in group 6) only| HIT = (0.5 – 10)
H2T = (2 – 20)
H4T = (5 – 40)
H1H = (10 – 100)
H2H = – 200)
H4H = (40 – 400)
H7H = (70 – 700)
H1 K = 100 – 1000)| Al = General purpose
microswitch, rated at 15A; 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
  N2 = Monel / ‘A” NPT(F)| S1 = SS316 / 1/4″ BSP(F)
  S2 = SS316 / 1/4″ NPT(F)
  S3 = (welded diaphragm)
  SS316 / 1″ BSP(M)
  S4 = SS316 /1/2″ NPT(F)
  S5 = SS316 / W NPT(M)
  H1 = Hastelloy C / 1/4″ BSP(F)
  H2 = Hastelloy C / 1/4″ NPT(F)
  N1 = Monel / 1/4″ BSP(F)
  More options available. Please contact sales office.| 0 = Neoprene
  1 = PTFE
  2 = SS 316L
  3 = Hastelloy C
  4 = Monel

eg. A hydraulic diaphragm pressure switch, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 5 bar to 40 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size shall be specified by

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA220802

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