Orion INSTRUMENTS DS Hydraulic Diaphragm Pressure Switches Instructions

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

1. Pressure Port (SS)
2. Plunger (SS)
3. Housing Plate (SS)
4. Diaphragm (SS)
5. O-Ring (PTFE ®)
6. 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:

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 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