SUPPLY
420kPa - 800kPa (4.2-8 barg)
INSTRUMENT
AIR/INERT GAS
H
D.P.HI FROM RELIEF VALVE
50mm [2"] I.D. MINIMUM
AUTOMATIC
PURGE
VALVE
MINIPURGE
CONTROL LOGIC
XC
PURGE COMPLETE (READY TO START)
LOW PRESSURE ALARM (LOW LOW PRESSURE TRIP)
XI
PAL
PURGING/
PURGE
COMPLETE
MINIPURGE SYSTEM ENCLOSURE
1/8" NPT
6mm [1/4"] I.D.
D.P. LO FROM RELIEF VALVE
INTERMEDIATE LOW PRESSURE (LOW PRESSURE ALARM)
25mm [2"] I.D. MINIMUM
INTERMEDIATE
LOW
PRESSURE
PAL
PURGE OUTLET VALVE OPEN CONTROL SIGNAL
2" NPT /
FLANGE 2" 150lb ANSI 16.5
LOW
PRESSURE
ALARM
1/8" NPT
1/8" NPT
1/8" NPT
PRIMARY HIGH ENCLOSURE PRESSURE
6mm [1/4"] I.D.
6mm [1/4"] I.D.
6mm [1/4"] I.D.
3" NPT /
FLANGE 3" 150lb ANSI 16.5
*
RELIEF
VALVE
ASSEMBLY
1/8" NPT TEST POINT
NORMALLY PLUGGED
MOTOR ENCLOSURE
1/8"
NPT
1/8"
NPT
1/8"
NPT
RECOMMENDED MINIMUM SIZE FOR PURGE AIR DISTRIBUTION
PIPEWORK
*
ELECTRICAL SIGNAL VIA EEx e JUNCTION BOX
B
C
D
E
F
8
5
7
6
4
3
1
2
3RD ANGLE
PROJECTION
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential and are returnable upon request. They are not
to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither are they to be used in any way against our interests.
DIMENSIONS IN mm
[ ] DENOTES IMPERIAL
WEIGHT (Kg)
TITLE
DO NOT SCALE
IF IN DOUBT ASK
FINISH
MATERIAL
A3
SCALE
DRAWING STATUS
A
TOLERANCES UNLESS
OTHERWISE STATED
FLATNESS TO BE LESS THAN
0.4 OVER ANY 100mm LENGTH
ANGLE
STD ±1°
MOD #
REVISION
DRAWN
CHECKED
APPROVED
DATE
DRAWN DATE
SURREY TW16 5DB UNITED KINGDOM
Expo Technologies Limited
DRAWING No.
REVISION
DECIMALS
X ±0.5
X.X ±0.2
X.XX ±0.1
X.XXx ±0.05
CONTROLLED
D801-PI
D801 P & I DIAGRAM
02
RELEASED
N.T.S
DQN-12479
DRAWN
CE
RJ
AR
SLW
SB
JPdB
02
01
15/09/10
20/05/21
27/01/16
1
SHEET No.
OF
1
