Orion INSTRUMENTS N03 Low Dp High Proof Air Relay Switches Instructions

LOW DP HIGH PROOF AIR RELAY SWITCHES FC

PRESSURE CAPSULE DETAILS

1. Support spring (S.S.)
2. High pressure port (S.S.)*
3. Bottom flange (S.S.)*
4. Support plate (S.S.)
5. Diaphragm (Neoprene)
6. Gasket (PTFE)
7. Top plate (S.S.)
8. Top flange (S.S.)*
9. Transfer pin (S.S.)
10. ‘O’ ring (Nitrile)
11. Sealing diaphragm (Nitrile)
12. PTFE O-Ring
13. SS 316 Ring
14. Low pressure port (S.S.)*
15. Holding screw (C.S.)

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

RANGE SELECTION TABLE

Range Code| Range mbar (“wc)| Differential* mbar (” wc)| Maximum Working Pressure bar (psi)
---|---|---|---
Approximate Maximum for P1 / P2
(Refer Group 6 of How to order table)
N03| 5 to 25
(2.009 to 10.047)| Please consult Sales Office for further information.| 20.0
(290.075)
N05| 10 to 50
(4.018 to 20.093)| 20.0
(290.075)
N10| 10 to 100
(4.018 to 40.186)| 20.0
(290.075)
N15| 10 to 150
(4.018 to 60.280)| 20.0
(290.075)
N25| 20 to 250
(8.037 to 100.466)| 20.0
(290.075)
N35| 50 to 350
(20.093 to 140.653)| 20.0
(290.075)

Pneumatic valve specifications

NO = Normally Open
NC = Normally Closed
C = Common

CAUTION : Supply pressure of air/inert gas = min. 2 and max. 7 bar
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.

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 FLAMEPROOF LOW DP HIGH PROOF AIR RELAY SWITCHES

Group 1| Group 2| Group 3| Group 4| Group 5| Group 6| Group 7| Group 8
---|---|---|---|---|---|---|---
Non standard allocation| Model| Air Inlet/Outlet Ports| Switch Type| Range Code (values in mbar)| Valve 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.| FC = Air Relay switch
Note: Flameproof certification not applicable for Air Relay Switch| A1 = Al. headPU tube 4mm OD
*A4 = Grey CI PU tube 4mm OD
A7 = SS head PU tube 4mm OD

• Not available in FE models| D1 = pressure difference switch, fixed differential without scale| N03 = (5 – 25)
  N05 = (10 – 50)
  N10 = (10 – 100)
  N15 = (10 – 150)
  N25 = (20 – 250)
  N35 = (50 – 350)| P1 = NC valve
  P2 = NO valve| S1 = SS316 / ¼” BSP(F)
  S2 = SS316 / ¼” NPT(F)
  Please refer Page No. 118 for Pressure Port options| 0 = Neoprene
  1 = PTFE

eg. Flameproof air relay switch in aluminium housing with PU tube 4mm OD, fixed differential without scale, having 5 mbar to 25 mbar pressure range, with NC valve, 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
---|---|---|---|---|---|---|---
◻| FC| A| D1| N03| P1| S1| 0

Please specify full model number to avoid ambiguity.

Bulletin No. KA220407

Documents / Resources

| Orion INSTRUMENTS N03 Low Dp High Proof Air Relay Switches [pdf] Instructions
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