EXAtrac RF20H (Extract 810 and 820)
General
Specifications Process retractable holder
The retractable holder EXAtrac RF20 (Extrac 810 and 820) is
made for installation of Ø12mm sensors on tanks or pipelines
where the sensor has to be removed without interuptions or
shutdowns and in the hash applications where frequent cleaning
is of vital importance for a good pH measurement.
Specially suited for this retractable holder is the Yokogawa
SC24V differential pH sensor. In the SC24 differential pH sensor,
the reference cell is made of glass, with no porous junction. No
electrolyte is in contact with the process. Offering the possibility
of maintenance free operation without any reference problems.
The differential measuring principle combines the normal potential
generated by the pH glass with the potential from a Sodium pNa
glass. In applications where Sodium-, Potasium- or Calcium-salt
is present the glass will generate a stable reference voltage.
The retractable fittings installed with a suitable process
connection to a containers or pipe. In order to adapt to the
various process connections, the retractable fitting RF20H
(EXtract 810 and 820) is made of high-grade metal or plastic. In
addition one can choice between different process- and flushport
connectors, sealing materials and sensors.
Drive
Compressed air is supplied to the pneumatics connections.
The pneumatic drive unit drives the immersion tube down to
maximum insertion depth into the process medium. For security
reasons this is only possible when a sensor is inserted.
Measurement
When the end point of the position “Measure” is reached, the
control unit will receive a pneumatic position feedback. In this
situation the sensor head is sunk in the drive unit and cannot
not be RF20H (EXtract 810 and 820)ed from the process. The
sensor measures the chemical and / or physical characteristics of
the process liquid.
Service
The sensor can be cleaned, rinsed and calibrated during process
runs. To do so, the armature must be locked into the “service”
position. Again, a pneumatic position feedback is triggered
when the end point is reached. In the “Service“ position, the
immersion-tube seals the rinsing chamber from the process so
that no process liquid escapes. The necessary rinsing liquid can
be applied to the flushing port connector “IN”, into the rinsing
chamber and will flow out via flushing connector “OUT”.
Feautures
•
•
•
•
•
“plug and play” installation and connections
Integrated scraper
ATEX approved
Automatic safety lock while sensor is removed
Available in PP, PVDF, PEEK, SS AISI 316L
/ 1.4404 and Hastelloy
• Up to 16 bar and 140 °C
• Extension of sensor-lifetime and reduce maintenance
GS 12B06K05-E-E
2nd Edition
2
2
Product description
EXdescription
TRACT automatic retractable holder
1.2.1
Product
1.1 A
utomatic Retractable RF20H
(EXtract 810 and 820)
Components
mponents
1
Pneumatic connections 1-4
2
Top housing cramp
3
Drive unit
4
Lower housing cramp
5
Process connection
6
Sensor
7
Insertion rod with protection
Process Control System
RF20H
(EXmatic 450)
Transmitter
24V DC
Air 4-6 bar
cage
Variations
1.Pneumatic connections 1-4
2.Top housing cramp
3.Drive unit
4.Lower housing cramp
5.Process connection
Fig. 1: Retractable holder
6.Sensor
7.Insertion rod with protection cage
8.Cleaning port “IN”
9.Cleaning
port “OUT”
Retractable
holders are attached
10.Cleaning chamber
8
Cleaning port “IN”
9
Cleaning port “OUT”
10
Cleaning Cleaning
chamber
solution
Drain
to tanks or tubing by an
applicable process connection. In order to comply with the various
Fig. 1: Retractable fitting
Fig. 2: Process Cycle
1.2 Process integration
Pressure Temperature
process properties the EXTRACT retractable holder is fabricated of
stainless steel or plastic. You can further choose
between
different
The selection
of a suitable
armature is dependant on the
Drive
Control
pressure and temperature conditions of the process. Retractable
and cleaning
ports,
materials,armatures
and sensors.
For process
the well functioning
of the Retractable
fittingsealing
RF20H (EXtract
made of high-grade metal can be used up to a
810 and 820) the automatic control unit EXmatic can be used.
pressure of 16 bar. The plastic armatures up to 10 bar. The
It isCompressed
specially designed to
match
the functions via
of thethe
retractable
temperature on
mustthe
lie between -10°und 140°C. Please
air
is supplied
pneumaticprocess
connections
armature
check the pressure v.s. temperature diagrams.
drive unit. The drive unit inserts the insertion rod in the process
Measuring
Transmitter
Themedium
retractable armature
sensor into the
process
Please check
the pressure
up tobrings
the amaximal
insertion
depth. For
safety
reasons
thisand temperature diagrams
liquid, which is then able to pass its measurement signals to the
transmitter.
Installation
CAUTION!
is only possible with a sensor installed.
The armature can operated in any type of installation. In order to
PLC
receive reliable results from the measurement the proper sensor
reaching
theasfinal
position
of the “measuring”
position,
TheWhen
external control
unit as well
the transmitter
can be
has to be selected
for thatthe
process.
connected to a process control system. Dependent on the
DANGER!
control receives a pneumatic position signal. In this position the
results of measurement the measuring and rinsing intervals can
then be started automatically.
sensor head is immersed in the drive unit and cannot be removed.
The sensor measures the chemical or physical properties of the
process liquid.
Service
WARNING!
Cleaning, rinsing and calibration of the sensor
is possible while the
process is running. For this purpose the holder must be moved to
the “service” position. Another pneumatic position signal is caused
when the final position is reached. In the “service” position the
insertion rod seals the cleaning chamber against the process to
GS 12B06K05-E-E
7
"
Leave servicing works to qualified staff.
"
Always wear applicable protective clothes when performing
3
servicing works.
"
Do only perform the service works described in the operation
2. Special functions
manual!
2.1 Safety Requirements
2.4 Pneumatic connections
Position „Service“
The safety lock prevents that – without a sensor - the immersion
tube can be inserted into the process as this could cause
leakage of process liquid.
The sensor can only be removed when in the armature is in the
“service” position.
"
The agreed
Retractable fitting
RF20H
(EXtract 810 and 820) is operated
Constructional modifications must be
with
the
with compressed air. Four compressed air ports are present.
manufacturer!
"
Two to drive the cylinder and to for the feedback function.
Tubing and tanks must be pressure-free, empty and clean
Position „Measure“
The sensor is set into the „Measure“ position.
In this position, the sensor cannot be removed.
before disconnecting the holder from the process
"
Ensure that there is no potentially explosive atmosphere
Protection cage
The protection cage - at the end of the immersion tube- can
be aligned in order to protect the sensor against mechanical
damage.
2.2 Protection cage
The protective cage at the lower end of the immersion tube can
be aligned to the direction of flow. The symbol on the drive unit
shows the position of the opening in the immersion tube. If the
symbol is parallel to the direction of flow, the immersion tube’s
opening is in line with the process stream. If the symbol stands
perpendicularly to the current, then the sensor is completely
protected against direct flow. The immersion tube can be aligned
in any position between the parallel and perpendicular positions.
6.2
Checking wetted sealings
The retractable holder is fitted with an inspection window situated
between the lower housing cramps.

2.3 Proces affected seals check
The Retractable fitting has a small check window, which lies
between the lower housing clips
CAUTION!
Check inspection window for leakingFig.process
liquid on a
4: Pneumatic connections 1 – 4
regular basis.
When process liquid is present at the check window, the process
seals must be replaced.
Requirements :
2 Pneumatic tubing ø = 4 mm
2 Pneumatic tubing ø = 6 mm.
DANGER!
2.5 Automatic operation
For the automatic operation of the retractable fitting an
external control unit is necessary.
WARNING!
Consider
1)
2)
3)
4)
the functions of the pneumatics connections!
connection 2: Air supply position "Measure".
connection 4: Feedback position "Measure".
connection 1: Air supply position “Service".
connection 3: Feedback position “Service".
The external control unit can change the armature’s position from
the "Service" position into the "Measure" position.
Fig. 3: Check window at the lower housing-clamps
A pneumatic signal is send when either the “Service” or
“Measure” position is reached.
Fig. 10: Inspection window on lower housing cramp
23
GS 12B06K05-E-E
4
Technical Data
2.6 Material Properties RF20H (EXtract 810 and 820)
Wetted components
Holder
metal
RF20H 1.4404/316L
Alloy C22, 2.4602
Drive unit
RF20H
cylinder
1.4404/316
Drive Unit
RF20H
plastic
PVDF
PEEK
cylinder extension
PA66 GF30
Cylinder
1.4404/316
seals
EPDM / FPM / FFKM
seals
EPDM
Cylinder extention
PA66 GF30
2.7 Flush ports connections
Threads
Without connection adapter
With connection adapter
G 1/8" (inner)
G¼" (inner)
NPT ¼" (inner)
Flush port pressure range
1 - 4 bar
2.8 Sensoren RF20H (EXtract 810 and 820)
Gel filled Sensors
RF20H length [mm]
225
diameter [mm]
12
Thread
PG 13,5
Flowing Sensors
RF20H Length [mm]
280
diameter [mm]
12
Thread
PG 13,5
Pneumatic hose
Piston drive hoses
Position feedback
ø  - outer
6 mm 4 mm ø  - inner
4 mm
2 mm
Compressed air
filtered 40µm, water- and oil free
4 - 6 bar
No continuous air usage!
2.9 Pneumatics
GS 12B06K05-E-E
Sealing
EPDM
8.6
5
Dimensions
2.10 Dimensions
Holder
Holder
Dimensio
Dimensio
Dimensio
ns
ns
ns
EX
TRACT
EX
TRACT
EX
TRACT
EX
TRACT
EX
TRACT
EX
TRACT
810
810
810
811
811
811
820
820
820
821
821
821
[mm]
AA
[mm]
[mm]
1A
1
11
180
180
180
180
180
180
180
180
180
180
180
180
[mm]
AA
[mm]
[mm]
2A
2
22
350
350
350
480
480
480
350
350
350
480
480
480
BB[mm]
[mm]
B[mm]
9595
95
9595
95
9595
95
9595
95
Dimensions
A1Dimensio
[mm]
A 2 [mm]
ns
B [mm]
RF20H
RF20H
Metal (EXtract 810)
Plastic (EXtract 820)
EXTRACT
EXTRACT
180
180
350
350
TRACT
95
95 820
TRACT
810
811TRACT
821
Process
connections
EX
Process
connections
EX
Process
connections
EX
810/811
810/811
810/811
Process
connections RF20H
(EXtract 810)180
180 in Metal180
A 1 [mm]
A
B
A [mm]
Flange
Flange
350 4404 480
350C22
BBB 180
AAA
A2 [mm]
B [mm]
350
480
Flange
4404
Flange
4404
Flange
4404
95
95
480
350
Flange
C22
Flange
C22
Flange
C22
95
95
CCC
C
NPT
NPT
NPT
NPT
D
TriClamp
DDD
TriClamp
TriClamp
TriClamp
Process connections EXTRACT 810/811
Dimensions
E1 [mm]
E2
[mm]
Dimensio
Dimensio
Dimensio
D1 [mm]
ns
ns
ns
D2
[mm]
D3 [mm]
A
B
C
D
Flange 4404
Flange C22
NPT
TriClamp
71
107
EX
TRACT
EX
TRACT
EX
TRACT
19
31
810
811
810
811
810
811
-
66
102
EX
TRACT
EX
TRACT
EX
TRACT
19
31
810
811
810
811
810
811
-
34
70
EX
TRACT
EX
TRACT
EX
TRACT
19
31
810
810
810
-
39
75
19
31
64
EX
TRACT
EX
TRACT
EX
TRACT
810
810
810
E1
[mm]
E1
[mm]
E1
[mm]
7171
71
171
171
171
6666
66
166
166
166
3434
34
3939
39
E2
[mm]
E2
[mm]
E2
[mm]
107
107
107
207
207
207
102
102
102
202
202
202
7070
70
7575
75
D1
[mm]
D1
[mm]
D1
[mm]
1919
19
1919
19
1919
19
1919
19
1919
19
1919
19
D2
[mm]
D2
[mm]
D2
[mm]
Dimensio
D3
[mm]
D3
[mm]
D3
[mm]
ns
3131
3636
31
36
EXTRACT
----810
811
3131
31
EXTRACT
--810
3131
31
EXTRACT
6464
64
810
3131
3636
31
36
EXTRACT
----810
811
E1 [mm]
71
171
66
166
34
39
E2 [mm]
107
207
102
202
70
75
D1 [mm]
19
19
19
19
19
19
D2 [mm]
31
36
31
36
31
D3 [mm]
-
-
-
-
-
GS 12B06K05-E-E
31
64
41
41
41
6
Process
Processconnections
connectionsEX
EXTRACT
TRACT820/821
820/821
AA
BB
Process connections RF20H in Plastic (EXtract 820)
A
Flange Flange
Flange
B
NPT
NPT
NPT
8 Technical specifications
8.8
Process conditions EXTRACT 810/811
max.
allowed
pressure
8
Technical
specifications
PS:
16 bar
max. allowed temperature TS:
Dimensions
E1 [mm]
E2 [mm]
D1 [mm]
D2 [mm]
8.8
140 °C
58 94 EX
EXTRACT
TRACT
19
31
820
820
821
821
29
65
EX
EXTRACT
TRACT
TRACT
19
30.5820
820
821
821
Process conditions EX
810/811
PS in [bar]
20
2.11e1
Ambient
Conditions
max.
allowed
pressure
PS:
e1
[mm]
[mm]
58
58
158
158 16 bar29
29
Ambient
temperatures
- 10 - 70 °C
15
Transport-temperature
and storage temperatures
- 20°C
- 80 °C
max.e2
allowed
140
e2
[mm]
[mm]
94
94 TS: 194
194
65
65
10
2.12 Process Conditions RF20H (EXtract 810)
PS in [bar]
15
140
130
120
30.5
30.5
110
60
50
40
30
20
0
10
-10
31
31
100
36
36
20
90
d2
d20[mm]
[mm]
19
19
16 bar
140 °C
80
19
19
max. Alowable Temperatures TS:
70
d1
d1
[mm]
19
19PS:
max.
Alowable pressures
5[mm]
TS in [°C]
1.4404 und 2.4602
10
8.7
8.7
Ambient
Ambientconditions
conditions
130
120
110
90
100
80
70
60
50
40
30
- -20
20- -80
80°C
°C
20
8.9 Transport
Process
conditions
TS
inEX
[°C]TRACT 820/821
Transport
and
and
storage
storage
temperature
temperature
0
- -10
10- -70
70°C
°C
10
Fig. 19:0Pressure temperature diagram EXTRACT 810/811
Ambient
Ambienttemperature
temperature
-10
140
5
1.4404 und 2.4602
Fig. 5: Pressure-Temperature-Diagram
max. allowed pressure PS
10 bar
2.13 Process Conditions RF20H (EXtract 820)
max.19:
allowed
temperature
TS diagram
140 °C
Fig.
Pressure
temperature
EXTRACT 810/811
max. Alowable pressures PS:
10 bar
max. Alowable Temperatures TS:
8.9
140 °C
Process conditions EXTRACT 820/821
140
130
PEEK
140
130
820/821
120
110
100
90
80
70
60
40
30
20
10
50
TS in [°C]
120
110
100
90
80
70
60
50
40
30
20
10
0
0
-10
PS in [bar]
-10
PS in [bar]
12
10
max. allowed
pressure PS
10 bar
8
max. allowed temperature TS
140 °C
6
4
2
0
12
10
TS in [°C]
Fig 6. : Pressure-Temperature-Diagram
8
PP
PVDF
6
GS 12B06K05-E-E
4
Fig. 20:2 Pressure temperature diagram EXTRACT
0
7
3. Model and Suffix code RF20H (EXtract 810 and 820)
RF20H
Material (wetted parts)
-PP
-PF
-PK
-SS
-HC
Sealing Material -EPD
(wetted sealings) -FPM
-FKM
Sensor -225
-280
Process Connection -D32
-D40
-D50
-A14
-A12
-A20
-N14
-T20
Cleaning Connection -G18
-G14
-N14 Position switch -PN
pH-Retractable Holder RF20H
PP
PVDF
PEEK
Stainless Steel 1.4404 / 316L
Alloy C22 2.4602
EPDM
FPM (Viton)
FFKM (Kalrez)
Suitable for 225mm PG13.5 Gel-filled
Suitable for 280mm PG13.5 Liquid-filled
Flange DN32 PN16
Flange DN40 PN16
Flange DN50 PN16
Flange ANSI 1 1/4” 150lbs
Flange ANSI 1 1/2” 150lbs
Flange ANSI 2” 150lbs
NPT M 1 1/4”
Tri Clamp 2”
G 1/8” thread female
G 1/4” thread female
1/4” NPT female
Pneumatic
Model & Suffix Codes
Model Suffix Option Description
Code Code
Code
SC24VCombined 12mm four-in-one
salt sensitive reference pH sensor
with Variopin connector
Sensor -ALN26Ag/AgCl reference system,
type pH half cell L-glass, reference
cell salt sensitive glass, non-flow,
heavy duty
Sensor
-120
120 mm
length
-225
225 mm
remark
(EXtract
(EXtract
(EXtract
(EXtract
(EXtract
820)
820)
820)
810)
810)
SS/Hast only
SS/Hast only
SS/Hast only
SS/Hast only
SS/Hast only
Connection equipment
Prod. No.
Description
WU10-V-D-02 Cable Variopin dual coax 2 m
WU10-V-D-05 Cable Variopin dual coax 5 m
WU10-V-D-10 Cable Variopin dual coax 10 m
WU10-V-D-15 Cable Variopin dual coax 15 m
WU10-V-D-20 Cable Variopin dual coax 20 m
BA10
Junction box for pH extension cables
WF10-XXX-FpH signal cable with terminated ends. Specify
length in whole meters (e.g. XXX = 020)
Spareparts
Partnumber
10/2-123-40-001
10/2-123-41-001
10/2-123-42-001
10/2-075-03-001
10/2-075-03-002
10/2-061-33-004
10/2-061-34-004
10/2-061-22-004
10/2-061-23-004
10/2-061-29-004
10/2-086-32-001
Description
Sealing Set EPDM
Sealing Set FPM
Sealing Set FFKM (Kalrez)
Drive Unit - sensor 225/325 pneum. position switch
Drive Unit - sensor 280/380 pneum. position switch
Insertion rod RF20H 1.4404 / 316L (EXtract 810)
Insertion rod RF20H 2.4602 / Alloy C22 (EXtract 810)
Insertion rod RF20H PP (EXtract 820)
Insertion rod RF20H PVDF/Alloy C22 (EXtract 820)
Insertion rod RF20H PEEK (EXtract 820)
Set blind plug G1/8” 1.4301/316 for cleaning chamber
GS 12B06K05-E-E
YOKOGAWA ELECTRIC CORPORATION
World Headquarters
9-32, Nakacho 2-chome, Musashino-shi
Tokyo 180-8750
Japan
www.yokogawa.com
YOKOGAWA ELECTRIC ASIA Pte. LTD.
5 Bedok South Road
Singapore 469270
Singapore
www.yokogawa.com/sg
YOKOGAWA CORPORATION OF AMERICA
2 Dart Road
Newnan GA 30265
USA
www.yokogawa.com/us
YOKOGAWA CHINA CO. LTD.
3F Tower D Cartelo Crocodile Building
No.568 West Tianshan Road Changing District
Shanghai, China
www.yokogawa.com/cn
Euroweg 2
3825 HD Amersfoort
The Netherlands
www.yokogawa.com/eu
YOKOGAWA MIDDLE EAST B.S.C.(c)
P.O. Box 10070, Manama
Building 577, Road 2516, Busaiteen 225
Muharraq, Bahrain
www.yokogawa.com/bh
GS
12B06K05-E-E
GS 12X0X0-E-E
Subject
change
without
Subject toto
change
without
noticenotice
Copyright ©
Copyright©
Yokogawa has an extensive sales and
distribution network.
Please refer to the European website
(www.yokogawa.com/eu) to contact your
nearest representative.
Printed inPrinted
The Netherlands,
02-1004
in The Netherlands,
00-000(A)
(A)II