background image

flo

w

 ab

ov

e t

he mi

ni

mum s

pec

ifi

ed

?

A

ir 

en

te

rs 

th

PE

PR

ESSUR

IZED

 IND

ICATO

R

"Pre

ssu

rize

d/

Flo

w

sig

na

l a

bse

nt

 i.

e.

 "Ala

rm

O

N

Tu

rn

 Pre

ssu

rizin

ai

or

 in

er

ga

on

EX

PO

 C

ER

TIFIC

A

TIO

N

 D

R

A

W

IN

G

 EP9

9-

2-

4

"Pre

ssurize

d/

Flo

w

sig

nal 

to

 re

m

ote

 alarm

 sw

itch

Pre

ssurize

Enclo

sure

 d

oo

clo

se

d

TH

IS

 D

R

A

W

IN

G

 IS

 R

EFER

EN

C

ED

 T

O

Pu

rg

flo

w

 c

eas

es

Rel

ie

V

al

ve 

cl

os

es

A

ctio

ta

ke

on

 Pre

ssu

re

/F

lo

w

 

Tr

ip 

A

la

rm

 a

nd 

de

la

ye

tr

ip

Po

ssib

le

 "Actio

on

 Pre

ssure

/Flo

w

 

Gr

een at

 "

Pur

ge

 Co

mp

le

te

"

"P

ur

ge

 Co

mp

le

te

si

gn

al

 t

el

ec

tr

ic

al

 P

ow

er

 S

w

itc

h

O

ptio

nal 

op

er

atio

(Use

de

cisio

n)

failur

de

pe

nd

up

on

 t

he 

user

Act

io

ns 

includ

e:- 

Alar

m

 and

/o

Failure

(use

de

cisio

n)

A

uto

m

atic 

op

er

at

io

by

 th

sy

ste

m

K

ey

 to

 f

un

ctio

ns

Manual 

op

er

at

io

by

 t

he 

user

Po

w

er 

O

In

di

ca

to

tu

rn

w

ith

/w

itho

ut

 d

elay

"Pre

ssu

rize

d/

Flo

w

sig

na

l a

bse

nt

 i.

e.

 "Ala

rm

O

N

Pre

ssurize

d/

Flo

w

 Ind

icato

fall 

be

lo

w

 the

 m

inim

um

En

cl

os

ur

door

 ope

ne

d, 

or

 e

xc

es

si

ve

 le

ak

ag

e

Pre

ssu

rizin

ai

or

 in

er

ga

tu

rn

ed

 o

ff

Pu

rg

tim

er 

re

se

ts

Po

w

er 

on

 -

 N

orm

al

 o

pe

ra

tio

n

O

utle

flo

w

 still ab

ov

the

 m

inim

um

?

Co

nt

inuo

us 

Fl

ow

D

ilut

io

Fl

ow

 st

ar

ts

No

Yes

Po

w

er 

on

Po

w

er 

Sw

sig

nal 

O

N

Pu

rg

timer

 t

imes

 o

ut

Yes

Po

w

er 

tu

rn

ed

 o

ff

 a

uto

m

atica

lly

 

R

ed 

= P

re

ss

ur

e/

Fl

ow 

Lo

w

Lo

w

 Pre

ssure

/Flo

w

 se

nso

turns o

ff

En

cl

os

ur

pr

es

su

re

 or

 F

low 

Gr

een 

=

 P

res

su

re

/F

lo

w

 O

K

No

Pu

rg

e O

ut

let

 fl

ow

 ab

ov

e t

he mi

ni

mum?

Pu

rg

tim

er

 sta

rts 

au

to

m

atica

lly

Lo

w

 Pre

ssure

 se

nso

turns o

n

No

Yes

Enc

lo

sur

e p

res

su

re

 and

 t

he p

ur

ge o

ut

let

 

R

ed

 =

 Pre

ssure

 Lo

w

PR

ESSUR

IZED

 IND

ICATO

R

RE

V

.

M

O

D

 NU

M

BE

R

APPRO

V

ED

 D

A

TE

APPRO

V

ED

01

D

RAWN

23/06/2010

JP

d

B

REV:

PSC

 

1

SURREY  KT7 0RH

JPdB

23/

06/

2010

an

ar

re

tu

rn

able 

upon

 r

equ

es

t.

  T

hey

 ar

no

to be c

opied 

or

 c

ommu

ni

ca

ted 

in

 par

or

 in

 w

hole 

w

ith

ou

w

ritten

 c

on

sen

TOLER

A

N

C

ES

MATERI

AL

3r

ANGLE

DO 

N

O

SCALE

Expo Technologies Limited

JOB 

N

o:

 

FIN

IS

H

TITLE

 

CUSTOMER:

 

FL

AT

N

ESS 

TO

 BE

 LE

SS 

TH

AN

 0.

4m

m

 OVE

R

 AN

100m

m

 LE

N

G

TH

U

N

S

PE

C

IF

IE

D

PROJECTION

D

IM

ENS

IO

NS

 I

m

m

BRD

DR'WN

fro

m

 Exp

Te

chno

lo

gi

es

 L

im

it

ed

ne

it

he

ar

th

ey

 t

be

 use

in

 a

ny 

wa

ag

ai

nst

 o

ur 

in

te

re

st

s.

Controlled

UNI

TED KI

NG

DO

M

DR

A

W

IN

No

.

SCALE

Th

co

nten

ts

 of

 th

is

 dr

aw

in

doc

umen

ar

C

opy

ri

gh

© E

xp

Te

ch

no

logies

 Limited.

  T

hey

 ar

to be tr

eated 

as

 c

on

fiden

tial 

DE

PL

ACE

 ±

0

.1

   

 

SH

EET

 No

.

 

OF

XBR-

7TD0-

041

MIN

IPURGE 

X CF S

EQUEN

CE 

DIA

GRA

M

1:1

01

D

R

AW

ING

 STATUS:

APP'D

C

H

K

'D

1

NO

 D

EC

 P

LA

C

±0.

5

DE

PL

ACE

 ±

0

.2

DR

A

W

N

 DA

TE

:

Summary of Contents for MiniPurge Type X

Page 1: ...ML 442 Contents 1 Specification Sheet MiniPurge Type X Systems 2 Application Suitability 3 Description and Principle of Operation 4 Installation of the System 5 Commissioning 6 Maintenance of the Sys...

Page 2: ......

Page 3: ...ge Timer Stepped adjustable between 1 minute and 30 minutes Flow Pressure Sensors CF One sensor for both Low Pressure and Flow 1 WC 250 Pa 2 5 mbar LC Low Pressure Sensor 0 2 WC 50 Pa 0 5 mbar Flow Se...

Page 4: ...ina T 86 532 8906 9858 E qingdao expoworldwide com Visual Indicators CF Alarm Pressurized Red Green Purge Complete Red Green LC Alarm Pressurized Red Green Purge Complete Black Amber Action on Loss of...

Page 5: ...itching devices may be limited in their gas group The certification documentation supplied with any such devices must be checked to ensure their suitability This system is designed for use primarily w...

Page 6: ...purge flow measurement purge timing and local visual indication of Pressurized Alarm and flow sensed It also provides the outputs for power and remote alarm control corresponding to the output type s...

Page 7: ...ies UK T 44 0 20 8398 8011 E sales expoworldwide com Expo Technologies US T 1 440 247 5314 E sales na expoworldwide com Expo Technologies China T 86 532 8906 9858 E qingdao expoworldwide com Figure 3...

Page 8: ...ou will find that the RLV spring will cycle open and closed If this happens contact our service department for advice Figure 4 Leakage Compensation Circuit Diagram 3 5 Type of Output The functions of...

Page 9: ...e connected to IS circuits as the switch contacts are in the hazardous area In many instances these outputs may be connected to the Expo range of MiniPurge Interface Units MIU Figure 7 Intrinsically S...

Page 10: ...lled as close as possible to the PE It should be installed so that the system indicators and certification labels may be readily observed 4 2 Relief Valve RLV and Spark Arrestor Unit SAU To achieve ef...

Page 11: ...l Unit should be piped within the pressurized enclosure to ensure purging of potential dead air spots The purge system is fitted with an internal regulator factory set to 3 bar feeding the logic 4 4 P...

Page 12: ...e user s responsibility to verify or enter this data on the PE and or MiniPurge system nameplate Ask Expo if in doubt The IEC EN 60079 2 permits 5 free volume changes and an example of the calculation...

Page 13: ...AND AUTOMATIC DISCONNECT OF POWER A T a Leakage Compensation The action on loss of pressurization is set by moving the jumper tube see Figure 10 Action on Loss of Pressurization Jumper Tube The standa...

Page 14: ...as Release If the PE contains an internal source of release of flammable gas or vapour the procedures for assessment of the release as given in NFPA 496 or IEC EN 60079 2 should be used Expo is please...

Page 15: ...er thread size as the MiniPurge CU inlet fitting upstream of the connection 5 1 Continuous Flow CF Systems Open the Flow Control Valve FCV until the alarm pressurized indicator just turns from red to...

Page 16: ...of the minimum are permitted and a tolerance of 20 is normally acceptable If the time is too short it must be increased accordingly After the power has been applied via the CU the purging valve will c...

Page 17: ...n as the alarm pressurized indicator turns red the system will start to re purge If Alarm and Trip function is selected the enclosure power will be switched off While it is re purging return the LCV t...

Page 18: ...re Check the condition of the air supply filter element Clean or replace it as necessary At least every two years check the following additional items Apparatus is suitable for the Hazardous Location...

Page 19: ...2 months old parts under warranty should be returned to Expo for investigation with a full report of the fault and the system serial number As with any pneumatic system the greatest enemies are water...

Page 20: ...r supply pressure at the inlet to the MiniPurge is stable between 4 8 Barg 60 115 psi Yes Replace pipe work No Yes Any significant leakage must be corrected Check for leaks down the cables or conduit...

Page 21: ...vailable No Yes Check the small indicator button on the timer valve When the valve has timed out it should return out when depressed No Yes Yes Check if the external Power Switch contacts close at 1 4...

Page 22: ...s there debris on the RLV disk allowing air to leak from the valve Relief Valve opens continuously or intermittently Call Expo Remove the RLV cover and clean the valve disk If it is necessary to remov...

Page 23: ...ing LC Is the actual PE pressure below the setting of the Minimum Pressure Sensor Is the Leakage Compensation Valve setting too low causing the MiniPurge to auto repurge System purges correctly but th...

Page 24: ...MiniPurge is stable between 4 8 Barg 60 115 psi Yes Replace pipe work No Yes Any significant leakage must be corrected Check for leaks down the cables or conduit Ensure leakage does not exceed 60 Nl m...

Page 25: ...vailable No Yes Check the small indicator button on the timer valve When the valve has timed out it should return out when depressed No Yes Yes Check if the external Power Switch contacts close at 1 4...

Page 26: ...ere debris on the RLV disk allowing air to leak from the valve Relief Valve opens continuously or intermittently Call Expo Remove the RLV cover and clean the valve disk If it is necessary to remove th...

Page 27: ...y Certificate Certificate Number Ex e junction box IECEx Certificate IECEx ITS 10 0003X ATEX Certificate 10ATEX37092X INMETRO T V T V 12 1463 Ex d switches IECEx Certificate IECEx EPS 14 0092X ATEX Ce...

Page 28: ...rned off automatically without delay Pressurized signal absent i e Alarm ON include Alarm and or Trip Red Pressure Low Low Pressure sensor turns off Enclosure pressure falls below the minimum Enclosur...

Page 29: ...Flow starts No Yes Power on Power Sw signal ON Purge timer times out Yes Power turned off automatically Red Pressure Flow Low Low Pressure Flow sensor turns off Enclosure pressure or Flow Green Pressu...

Page 30: ...E 0 1 CERT RELATED MJF DRAWN 1 1 1 STAINLESS STEEL 3 CF OPTION SAU 25 SPARK ARRESTOR CF OPTION ONLY D P LO 6mm OR M5 10 32 UNF FITTING SUPPLIED MiniPurge CONFIGURATION PIPING KIT OPTIONAL DIRECT MOUNT...

Page 31: ......

Page 32: ...CONNECTION 1 8 NPTF 129 5 08 REMOVABLE COVER HOLE SUITABLE FOR GLAND M20 OR 1 2 NPT MOUNTING BAR PITCH 210 8 27 MOUNTING BAR SPECIAL OPTION ONLY 1 2 PA OPTION CUSTOMER TO SITE AND DRILL INPUT GLAND HO...

Page 33: ...RIP DOOR INTERNAL AO C A T A T AO C 26 22 LC LEAKAGE COMPENSATION SHOWN ITEMS IN DOTTED REMOVED FOR CF DRAWING STATUS APPROVED MOD No DATE ISSUE MATERIAL FINISH SURREY KT7 0RH UNITED KINGDOM Expo Tech...

Page 34: ...RH UNITED KINGDOM Expo Technologies Limited JOB No TITLE CUSTOMER DRAWING No SHEET No SCALE OF NO DEC PLACE 0 5 1 DEC PLACE 0 2 2 DEC PLACE 0 1 FLATNESS TO BE LESS THAN 0 4mm OVER ANY 100mm LENGTH 3rd...

Page 35: ...I e c a f r e t n I t i n U y l p p u s r e w o P s r o t c a t n o c r e w o p r o n o i t a c o L s u o d r a z a H n o N n o i t a c o L s u o d r a z a H V 0 3 x a m V A m 0 0 1 x a m I s y a l e...

Page 36: ...connection of the MIU e shall be connected to earth using minimum 4mm2 conductor TERMINALS MIU e may be fitted with a combination of WDU2 5 terminals certified to KEMA 98ATEX1683U IECEx ULD05 0008U S...

Page 37: ...Pressure Equipment Directive 97 23 EC MiniPurge Systems are classified as not higher than category I under Article 9 of this Directive and intended for use in potentially explosive atmospheres Hazard...

Page 38: ......

Page 39: ......

Page 40: ...Technologies UK Expo Technologies Ltd Unit 2 The Summit Hanworth Road Sunbury On Thames TW16 5DB UK T 44 20 8398 8011 F 44 20 8398 8014 E sales expoworldwide com Expo Technologies China Qingdao Expo...

Reviews: