Orion INSTRUMENTS DS Hydraulic Diaphragm Pressure Switches Instructions
- June 13, 2024
- Orion Instruments
Table of Contents
DS HYDRAULIC DIAPHRAGM
PRESSURE SWITCHES
Instructions
Pressure Ranges from 1 bar to
400 bar
PRESSURE CAPSULE DETAILS
Note : wetted parts are mentioned in italics.
No. Description
- Pressure Port (SS)
- Plunger (SS)
- Housing Plate (SS)
- Diaphragm (SS)
- O-Ring (PTFE ®)
- Backup Ring (SS316) (Options Available)
INSTALLATION DRAWING
RANGE SELECTION TABLE
Range Code| Range bar (psi)| *Differential bar (psi)|
Maximum Working Pressure bar (psi)
---|---|---|---
Approximate Maximum for “A8” microswitch**
H1T| 1 – 10| 1| 150
(14.50 – 145.04)| (14.50)| (2175.51)
H2T| 2 – 20| 2| 200
(29.00 – 290.07)| (29.00)| (2900.76)
H4T| 5 – 40| 5| 200
(72.52 – 580.15)| (72.52)| (2900.76)
H1H| 10 – 100| 12| 200
(146.04 – 1450.38)| (174.05)| (2900.76)
H2H| 10 – 200| 24| 400
(145.03 – 2900.76)| (348.09)| (5801.52)
H4H| 40 – 400| 70| 500
(580.15 – 5801.52)| (1015.27)| (7251.88)
Note:
- 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.
- When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactivate 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 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 for it’s coil.
HOW TO ORDER PROCESS HYDRAULIC DIAPHRAGM PRESSURE SWITCHES
Group 1| Group 2| Group 3| Group 4| Group 5| Group
6| Group 7| Group 8
---|---|---|---|---|---|---|---
Non standard allocation| Model| Cable Entry Size and Material of Enclosure|
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.| DS =
Process 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| PF2 = pressure switch, fixed
differential with scale in bar
PF3 = pressure switch, fixed differential with scale in psi
*PA2* = pressure switch, adjustable differential with scale in bar
PA3* = pressure switch, adjustable differential with scale in psi
Available with A6, A9 & B9 (in group 6) only| H1T = (0.5 – 10)
H2T = (2 – 20)
H4T = (5 – 40)
H1H = (10 – 100)
H2H = (7 – 200)
H4H = (40 – 400)| A1 = General purpose microswitch, rated at 15 A;
250 VAC
- A6 = Adjustable deadland
- A7 = 2SPDT switching elements
*A9* = General purpose microswitch
B7** = 2SPDT Switching Elements
*B9 = 2SPDT Switching Elements for adjustable differential - For detailed specifications of microswitches, please refer table on page no. 294 &295| S1 = SS316 / ¼” BSP(F)
S2 = SS316 / ¼” NPT(F)
Please refer page no. 290 & 291 for more pressure port options| 2 = SS316
3 = Hastelloy C
4 = Monel
eg. A industrial pressure switch with fixed differential having 5 bar to 40 bar pressure range, with 5 Amp. m microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by
Group 1| Group 2| Group 3| Group 4| Group 5| Group
6| Group 7| Group 8
---|---|---|---|---|---|---|---
| DS| 3| PF2| H1T| A1| S1| 2
Bulletin No. KA220802