RECOMMENDED
MINIMUM
SIZE
F
OR
PURGE
AIR
DISTRIBUTION
PIPEWORK
OPEN
PURGE
OUTLET
VALVE
CONTROL
SIGNAL
LOW
PRESSURE
ALARM
INTERMEDIATE
PRESSURE
1/2"
NPT
SUPPLY
5-16
barg
(73
-
230
psi
)
INSTRUMENT
AIR/INERT
GAS
1"
[25mm]
I.D.
MINIMUM
1"
NPT
AUTOMATIC
LEAKAGE
COMPENSATION
VALVE
1/2"
NPT
BOOST
AIR
CONTROL
UNIT
(OPTIONAL)
MANUALLY
SET
PURGE
BOOST
FLOW
CONTROL
VALVE
PI
H
CONNECT
TO
EITHER
AO
R
B
*
MANUALLY
SET
PURGE
FLOW
CONTROL
VALVE
H
PI
H
MINIPURGE
CONTROL
LOGIC
PURGING/
PURGE
COMPLETE
XI
XC
1"
[25mm]
I.D.
MINIMUM
1"
NPT
*
A
B
D.P.
LO
F
ROM
RELIEF
VALVE
D.P.HI
F
ROM
RELIEF
VALVE
1/8"
NPT
1/8"
NPT
1/8"
NPT
MOTOR
INTERLOCK
MINIPURGE
SYSTEM
ENCLOSURE
PAL
ALARM
/
PRESSURIZED
SYSTEM
PURGING
(OPTIONAL)
ELECTRICAL
SIGNAL
VIA
EEx
e
JUNCTION
BOX
OPTIONAL
1/8"
NPT
RELIEF
VALVE
ASSEMBLY
MOTOR
ENCLOSURE
1/8"
NPT
1/8"
NPT
1/4"
[6mm]
I.D.
1/4"
[6mm]
I.D.
1/4"
[6mm]
I.D.
1/8"
NPT
TEST
POINT
NORMALLY
PLUGGED
1/8"
NPT
PRIMARY
ENCLOSURE
PRESSURE
1/4"
[6mm]
I.D.
B
C
D
E
F
8
5
7
6
4
3
1
2
3RD
ANGLE
PROJECTION
The
contents
o
f
this
drawing
/
document
are
Copyright
©
E
xpo
Technologies
Limited.
They
are
to
be
treated
as
confidential
and
are
returnable
upon
reque
st.
T
hey
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
ou
r
interests.
DIMENSIONS
IN
m
m
[
]
D
ENOTES
IMPERIAL
WEIGHT
(Kg)
TITLE
DO
NOT
S
CALE
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
SHEET
No.
OF
1
1
D758-PI
D758
P
A
ND
I
D
IAGRAM
11
CERT
REL
N.T.S
DQN-12436
DQN-12429
5402
CE
AR
MH
AW
JPdB
11
10
09
10/01/2008
28/04/20
15/01/20
18/11/11
