Orion MD MT Low Range Pressure Switches User Guide

Orion MD MT Low Range Pressure Switches User Guide

MD/MT

LOW RANGE PRESSURE SWITCHES

MD

PRESSURE CAPSULE DETAILS

No. Description

1. Pressure Port (SS)
2. Support Spring (SS)
3. Bottom Flange (SS)
4. Support Plate (Al)
5. . Diaphragm (Neoprene)
6. Gasket (PTFE®)
7. Top Plate (Aluminium)
8. Top Flange (SS)
9. Plunger (SS)
10. Top Flange Screw (SS)
11. Sealing O-Ring (Nitrile)

Note : wetted parts are mentioned in italics.

*Pressure ports are brazed with flange

INSTALLATION DRAWING

MT

PRESSURE CAPSULE DETAILS

INSTALLATION DRAWING

RANGE SELECTION TABLE

Range Code| Range
mbar **(“wc)| Differential* mbar (“wc)| Maximum Working
Pressure bar (psi)**
---|---|---|---
ApproximateMaximumfor “Al”
microswitch
| 1.5 – 15.0| 3| 2
L02| (0.602 – 6.021)| (1.204)| (29.00)
| 5.0 – 25.0| 5| 2
L03| (2.007 – 10.037)| (2.007)| (29.00)
| 10.0 – 50.0| 5| 2
LOS| (4.015 – 20.073)| (2.007)| (29.00)
| 10.0 – 100.0| 10| 2
LW| (4.015 – 40.146)| (4.015)| (29.00)
| 10.0 – 150.0| 15| 2
L15| (4.015 – 60.22)| (6.027)| (29.00)
| 20.0 – 250.0| 20| 2
L25| (8.029 – 100.36)| (8.037)| (29.00)
| 50.0 – 350.0| 25| 2
L35| (20.073 – 140.52)| (10.036)| (29.00)

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 deactivate at the amen point. A small stage gap, normally unto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysteresis) typically tends to be at least double of those published for 1SPDT pressure switches.

If actuation and/or deactivation 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 fort’s coil.

SIHIOLIMS Ramstad IONVYH MOT TVIILSNANI §30H0 OL MOH

Non standard
allocation| Model| Cable Entry Size| Switch Type| Range Code
(values in mbar)| Microswitch
Type| Pressure Port
Material / Size| Diaphragm
0 Reserved for non-standard options not covered in catalogue. Will be given by manufacturer‘ only after agreement ofsupply detailswith customer.| MD = Industrialpressure switch with IP66 rated enclosure as per IS/IEC 60529 MT = Industrialpressure switch with IP66 rated enclosure as per IS/IEC 60529| 1 = Al. enclosure W NPT threads, 2 = m. enclosure Y.s” NPT threads3 = AI. enclosure M20 X 1.5 threads 7 = SS enclo sure, W NPT threads 3 ‘8 . = SS enclosure, A NPT threads 9 = SS enclosure,
M20 X 1.5 threadsNot availablefor MT modelFor dual cable entry
contact Sales Office| PF1 = pressure switch, fixed differential without scale PF2 = pressure switch, fixed differential with scale in mbarPF3 = pressure switch, fixeddifferential with scalein lint *PA1 =* pressure switch, adjustable differential without scale PA2 = pressure switch, adjustable differential with scale in mbar PA3 = pressure switch, adjustable differential with scale in “Wc’Availed° with A6, A9 & B9 (in group 6) only| L02 = (1.5 – 15)L03 = (5 – 25)L 05 = (10 ” 50) 110 = (10 – 100)L15 =(10 – 150) I- 25 = (20 – 250) 135 = (50 – 350) B9 = 2SPDTwitching Elements| A1= General purposemicroswitch, rated at 15A; 250 VACA6 =Adjustable deadband A7= 2SPDT switching elements A8 = General purpose microswitch A9 = General purpose microswitch B7 = 2SPDT Switching Elements ‘ Sfor adjustable differential• For detailed speofications of rn(croswitcees. pleaserefer table on
page no. 270| S1 =SS316 /’/4″ BSP(F)S2 =SS316 /’A” NPT(F) More** options available. Please contactsales office.| 0 = Neoprene1 = PTFE2 = SS316LMore options available. Please contactsales office.

eg. A low range industrial switch, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 5 mbar to 25 mbar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ” BSP port size & neoprene diaphragm shall be specified by

Please specify full model number to avoid ambiguity.

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