Page 1
Operating Instructions
for
Sight Glass with Rotor,
Drip Tube or Flap
Model: DAR-...
DAT-…
DAK-…
Page 2
DAR/DAT/DAK
1. Contents
1. Contents........................................................................................................2
2. Note .............................................................................................................3
3. Regulation Use..............................................................................................4
3.1 Risk and Safety References ................................................................4
4. Operating Principle........................................................................................5
4.1 Intended Use and Material Selection ................................................... 5
5. Storage, Transport and Instrument Inspection ..............................................6
6. Installation and First Starting-Up...................................................................6
6.1 Installation............................................................................................7
6.2 Initial Start-up.......................................................................................7
7. Technical Information....................................................................................8
8. Order Codes ...............................................................................................10
9. Maintenance ...............................................................................................12
10. Replacement of Glass Plates......................................................................13
10.1 Disassembly ......................................................................................13
10.2 New Assembly ...................................................................................13
11. Dimensions .................................................................................................15
12. Manufacturer’s Declaration .........................................................................18
13. Declaration of Conformance .......................................................................19
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: +49(0)6192-2990
Fax: +49(0)6192-23398
E-Mail: info.de@kobold.com
Internet: www.kobold.com
page 2 DAR K01/0507
Page 3
DAR/DAT/DAK
2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EWG-machine guidelines.
as per PED 97/23/EG
In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the
PED 97/23/EC no CE mark.
Pipe
Diagram 8
Group 1
dangerous fluids
DAR, DAT, DAK, 1/4" - 2" (up to DN50), 40 bar Art. 3, § 3
DAR, DAT, DAK, DN 65, 40 bar Cat. II
DAR, DAT, DAK, DN 80-125, 40 bar Cat. III
DAR, DAT, DAK, DN 150-200, 16 bar Cat. III
DAR K01/0507 page 3
Page 4
DAR/DAT/DAK
3. Regulation Use
Any use of the Sight Glass, model: DAR, DAT, DAK-… which exceeds the
manufacturer’s specifications may invalidate its warranty. Therefore any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.
3.1 Risk and Safety References
Very careful handling of the KOBOLD Sight Glass is required:
• It must be guaranteed that all work on or with glass plates and KOBOLD Sight
Glass is done by trained personnel.
• The valid safety regulations, especially for pipings under pressure and
temperature, must be considered.
• Before first starting up please follow the instructions mentioned under
section 6 !
• For cleaning and maintenance please follow the instructions mentioned under
section 9 and 10 !
• Installation and maintenance must be done exclusively in atmospheric
pressure and flow ambient temperature conditions. Shut off supply pipes and
waste pipes, in case of back pressure.
• Please use only KOBOLD spare parts.
Attention! Wear protective glasses anytime! During operation, the
KOBOLD Sight Glass is often under pressure and mostly high
temperatures! Maintenance during operation could present a danger
of serious burning or cauterisation by contact with the process fluid.
page 4 DAR K01/0507
Page 5
DAR/DAT/DAK
4. Operating Principle
The KOBOLD Sight Glass is installed into piping (flanged, screwed or welded). It
serves to make the visual inspection of medium flow possible, concerning quality
and quantity. For this, the Sight Glass with Rotor is provided with 2 opposite glass
plates.
4.1 Intended Use and Material Selection
Operational area and material selection are the responsibility of the operator
and/or designer of the system:
Body material and seals
These must be selected carefully with consideration of the flowing medium as
well as the operating conditions (pressure and temperature).
Glass plates
• Soda lime glass according to DIN 8902: max. 150 °C
• Borosilicate glass according to DIN 7080: max. 260 °C
• Within the very low temperature range there are no limits for the glass plates.
However AD-2000-Instruction W 10 for body and screw materials is to be
considered!
• Additional protection by mica sheets is recommended for desalinated
condensate or steam mixture and pH values starting from 8.
Pressure - Temperature – Operational Limits
Operating temperature 120 °C 150 °C 200 °C 250 °C 280 °C
PN 16 / ANSI 150 lbs 16 bar 15 bar 14 bar 13 bar 11 bar
PN 25 25 bar 23 bar 22 bar 20 bar 17 bar
PN 40 / ANSI 300 lbs 40 bar 37 bar 35 bar 32 bar 28 bar
Attention! The lowest value in the combination “body – seals –
glass plates” determines the maximally permissible limit for
temperature and pressure!
DAR K01/0507 page 5
Page 6
DAR/DAT/DAK
5. Storage, Transport and Instrument Inspection
The Sight Glasses with Rotor are to be transported and stored in professional
packaging. They must be kept dry and protected against dirt. Especially the glass
plates must be protected against impact and scratching.
Storage: From –10 °C to +40 °C in a clean and dry room.
Period of storage: Max. 3 years. After that time the seals must be checked
and possibly replaced.
Lacquer finish: Cast iron and cast steel Sight Glasses are provided with a
basic colour which is to protect the Sight Glass against
corrosion only during transport and storage. Therefore take
care not to damage the colour. Condensation must be
absolutely avoided.
Protective caps should be removed only shortly before installation to protect the
sealing surface.
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, because they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
• Sight Glass model: DAR-.../DAT-…/DAK-…
• Operating Instructions
6. Installation and First Starting-Up
• Any installation position is possible (except design with flap: installation
horizontal or vertical with flow upwards).
• The indication arrow for the flow direction is to be considered absolutely.
• Before installation take care that the piping and Sight Glass with Rotor are free
of dirt.
• Transmission of piping tensions on the Sight Glass with Rotor, due to the
installation process, is to be avoided
• Remove protection caps only shortly before installation to avoid damages of
the contact faces.
page 6 DAR K01/0507
Page 7
DAR/DAT/DAK
6.1 Installation
Flange connection
Piping flanges have to be concentrically aligned and parallel. Size of the flange
and type of contact faces must fit the Sight Glass with Rotor (see DIN 2526).
Distance of piping flanges = length of Sight Glass plus twice seal thickness. The
connection screws must be tightened alternately in a crosswise pattern, gradually
and steadily (see picture in section 10.2). The torque depends mainly on the
sealing material used.
Thread connection
The thread of the Sight Glass must fit the external thread of the piping in thread
type, size and lead. When screwing in, the Sight Glass with Rotor must be
secured directly at the threaded end with a suitable fork wrench or pliers.
Absolutely do not grip in the area of the sight glass covers, because glass
breakage is possible.
Attention! Glass plates and seals should be removed during the
welding procedure or should be covered inside and outside to
protect them against welding gases and welding splashes.
- See section 10: Replacement of glass plates
6.2 Initial Start-up
• Before initial start-up the torques of the fixing screws of the two cover flanges
should be checked and corrected (especially after a longer intermediate
storage!). The torques and procedure described in section 10 (Replacement of
glass plates) are to be considered!
• After the initial loading with pressure and temperature, a certain “settling” of
the seals will occur. Therefore the fixing screws of the covers are to be
checked once more under cold, pressureless conditions (as described in
section 10) and possibly corrected.
DAR K01/0507 page 7
Page 8
DAR/DAT/DAK
7. Technical Information
DAR-11 DAR-13 DAR-12
Rotor: plastic (up to 120 °C); option »R« PTFE up to 260 °C (nominal size 2": PTFE standard)
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025 C 22.8 stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150 °C);option: borosilicate glass DIN 7080 (up to 260 °C)
Screws: zinc plated steel stainless steel
Sealing: graphite (PTFE or other on request)
Mounting position: universal
Operating pressure: 16 bar (Option 25 or 40 bar for DAR-12... and DAR-13...)
DAR-21 DAR-23 DAR-22
Rotor: up to DN 40: plastic (up to 120 °C); option »R« PTFE up to 260 °C / from DN 50: PTFE
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025 / R St 37-2 C 22.8 / R St 37-2 stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150 °C);option: borosilicate glass DIN 7080 (up to 260 °C)
Screws: zinc plated steel stainless steel
Sealing: graphite (PTFE or other on request)
Mounting position: universal
Operating pressure: 16 bar (option 25 or 40 bar for DAR-22... and DAR-23...)
DAK-11 DAK-13 DAK-12
Flap: stainless steel 1.4571
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025 C 22.8 Stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150°C); option: borosilicate glass DIN 7080 (up to 280°C)
Screw: zinc plated steel stainless steel
Sealing: graphite (PTFE or other on request)
Mounting position: horizontal or vertical with flow from below
DAK-21 DAK-23 DAK-22
Flap: stainless steel 1.4571
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025/R St 37-2 C 22.8/R St 37-2 stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150°C); option: borosilicate glass DIN 7080 (up to 280°C)
Screws: zinc plated steel stainless steel
Seals: graphite (PTFE or other on request)
Mounting position: horizontal or vertical with flow from bottom to top
page 8 DAR K01/0507
Page 9
DAR/DAT/DAK
DAT-11 DAT-13 DAT-12
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025 C 22.8 stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150°C); option: borosilicate glass DIN 7080 (up to 280°C)
Screws: zinc plated steel stainless steel
Seals: graphite (PTFE or on request)
Mounting position: any position, preferably vertical, flow from top
DAT-21 DAT-23 DAT-22
Housing: grey cast iron 0.6025 cast steel 1.0619 stainless steel 1.4408
Cover plates: grey cast iron 0.6025/R St 37-2 C 22.8/R St 37-2 stainless steel 1.4301
Sight glass: soda lime glass DIN 8902 (up to 150°C); option: borosilicate glass DIN 7080 (up to 280°C)
Screws: zinc plated steel stainless steel
Seals: graphite (PTFE or on request)
Mounting position: any position, preferably vertical, flow from top
DAR K01/0507 page 9
Page 10
DAR/DAT/DAK
8. Order Codes
Example: DAR-1101H R08
DAR-11 DAR-13 DAR-12
soda lime glass, graphite-sealing, plastic rotor
DN
1/4“
3/8“
1/2“
3/4“
1“
1 1/4“
11/2“
2“
Flanged
conn.
DN
15
20
25
32
40
50
65
80
100
125
150**
200**
DN
1/4”
3/8”
1/2”
3/4”
1”
1 1/4”
1 1/2“
2“
Grey cast
iron
DAR-1101H.. DAR-1301H.. DAR-1201H.. R08 N08
DAR-1102H.. DAR-1302H.. DAR-1202H.. R10 N10
DAR-1103H.. DAR-1303H.. DAR-1203H.. R15 N15
DAR-1104H.. DAR-1304H.. DAR-1204H.. R20 N20
DAR-1105H.. DAR-1305H.. DAR-1205H.. R25 N25
DAR-1106H.. DAR-1306H.. DAR-1206H.. R32 N32
DAR-1107H.. DAR-1307H.. DAR-1207H.. R40 N40
DAR-1108H.. DAR-1308H.. DAR-1208H.. R50 N50
*not for DAR-11 grey cast iron instruments
Cast steel Stainless steel
Example: DAR-2201H F15
DAR-21 DAR-23 DAR-22
soda lime glass, graphite-sealing, plastic rotor
Grey cast
iron
DAR-2101H.. DAR-2301H.. DAR-2201H.. F15 A15
DAR-2102H.. DAR-2302H.. DAR-2202H.. F20 A20
DAR-2103H.. DAR-2303H.. DAR-2203H.. F25 A25
DAR-2104H.. DAR-2304H.. DAR-2204H.. F32 A32
DAR-2105H.. DAR-2305H.. DAR-2205H.. F40 A40
DAR-2106H.. DAR-2306H.. DAR-2206H.. F50 A50
DAR-2107H.. DAR-2307H.. DAR-2207H.. F65 A65
DAR-2108H.. DAR-2308H.. DAR-2208H.. F80 A80
DAR-2109H.. DAR-2309H.. DAR-2209H.. F1H A1H
DAR-2110H.. DAR-2310H.. DAR-2210H.. F1Z A1Z
DAR-2111H.. DAR-2311H.. DAR-2211H.. F1F A1F
DAR-2112H.. DAR-2312H.. DAR-2212H.. F2H A2H
** with instrument glass only PN 10, PN 16 with Option «B« possible
Cast steel Stainless steel
Example: DAK-1101H R08
DAK-11 DAK-13 DAK-12
soda lime glass, graphite-sealing
Grey cast
iron
DAK-1101H.. DAK-1301H.. DAK-1201H..
DAK-1102H.. DAK-1302H.. DAK-1202H..
DAK-1103H.. DAK-1303H.. DAK-1203H..
DAK-1104H.. DAK-1304H.. DAK-1204H..
DAK-1105H.. DAK-1305H.. DAK-1205H..
DAK-1106H.. DAK-1306H.. DAK-1206H..
DAK-1107H.. DAK-1307H.. DAK-1207H..
DAK-1108H.. DAK-1308H.. DAK-1208H..
*not for DAR-11 grey cast iron-instruments
Cast steel Stainless steel
Connection Option
G-
thread
Connection Option
DIN-
Flange
Connection Option
G-
thread
R08 N08
R10 N10
R15 N15
R20 N20
R25 N25
R32 N32
R40 N40
R50 N50
NPT-
thread*
ANSI-
Flange
(only on
request)
NPT-
thread*
add option letter to order number
Option »B«
borosilicate glass, graphite-sealing
Option »R« PTFE-Rotor
Option «P»
25 bar for DAR-12... and DAR-13...
Option «Q»
40 bar for DAR-12... and DAR-13...
add option letter to order number
Option »B«
borosilicate glass, graphite-sealing
Option »R« PTFE-Rotor
Option »P«
25 bar for DAR-22... and DAR-23...
Option »Q«
40 bar for DAR-22... and DAR-23...
add option letter to order number
Option »B«
borosilicate glass, graphite-sealing
Option »P«
25 bar for DAK-12… and DAK-13…
Option »Q«
40 bar for DAK-12… and DAK-13…
page 10 DAR K01/0507
Page 11
DAR/DAT/DAK
Example: DAK-2101H F15
Flanged
con.
DN
15
20
25
32
40
50
65
80
100
125
150**
200**
DAK-21 DAK-23 DAK-22
soda lime glass, graphite-sealing
Grey cast
iron
DAK-2101H.. DAK-2301H.. DAK-2201H.. F15
DAK-2102H.. DAK-2302H.. DAK-2202H.. F20 A20
DAK-2103H.. DAK-2303H.. DAK-2203H.. F25 A25
DAK-2104H.. DAK-2304H.. DAK-2204H.. F32 A32
DAK-2105H.. DAK-2305H.. DAK-2205H.. F40 A40
DAK-2106H.. DAK-2306H.. DAK-2206H.. F50 A50
DAK-2107H.. DAK-2307H.. DAK-2207H.. F65 A65
DAK-2108H.. DAK-2308H.. DAK-2208H.. F80 A80
DAK-2109H.. DAK-2309H.. DAK-2209H.. F1H A1H
DAK-2110H.. DAK-2310H.. DAK-2210H.. F1Z A1Z
DAK-2111H.. DAK-2311H.. DAK-2211H.. F1F A1F
DAK-2112H.. DAK-2312H.. DAK-2212H.. F2H A2H
** with soda lime glass only PN 10, PN 16 with Option «B« possible
Cast steel St. steel
Example: DAT-1101H R08
DN Grey cast iron Cast steel St. steel
1/4“
3/8“
1/2“
3/4“
1“
1 1/4“
1 1/2“
2“
DAT-11 DAT-13 DAT-12
soda lime glass, graphite-sealing
DAT-1101H.. DAT-1301H.. DAT-1201H.. R08 N08
DAT-1102H.. DAT-1302H.. DAT-1202H.. R10 N10
DAT-1103H.. DAT-1303H.. DAT-1203H.. R15 N15
DAT-1104H.. DAT-1304H.. DAT-1204H.. R20 N20
DAT-1105H.. DAT-1305H.. DAT-1205H.. R25 N25
DAT-1106H.. DAT-1306H.. DAT-1206H.. R32 N32
DAT-1107H.. DAT-1307H.. DAT-1207H.. R40 N40
DAT-1108H.. DAT-1308H.. DAT-1208H.. R50 N50
*not for DAT-11 grey cast iron-instruments
Example: DAT-2101H F15
Flanged
con.
DN
15
20
25
32
40
50
65
80
100
125
150**
200**
DAT-21 DAT-23 DAT-22
soda lime glass, graphite-sealing
Grey cast iron Cast steel St. steel
DAT-2101H.. DAT-2301H.. DAT-2201H.. F15 A15
DAT-2102H.. DAT-2302H.. DAT-2202H.. F20 A20
DAT-2103H.. DAT-2303H.. DAT-2203H.. F25 A25
DAT-2104H.. DAT-2304H.. DAT-2204H.. F32 A32
DAT-2105H.. DAT-2305H.. DAT-2205H.. F40 A40
DAT-2106H.. DAT-2306H.. DAT-2206H.. F50 A50
DAT-2107H.. DAT-2307H.. DAT-2207H.. F65 A65
DAT-2108H.. DAT-2308H.. DAT-2208H.. F80 A80
DAT-2109H.. DAT-2309H.. DAT-2209H.. F1H A1H
DAT-2110H.. DAT-2310H.. DAT-2210H.. F1Z A1Z
DAT-2111H.. DAT-2311H.. DAT-2211H.. F1F A1F
DAT-2112H.. DAT-2312H.. DAT-2212H.. F2H A2H
** with soda lime glass only PN 10, PN 16 with Option «B« possible
Connection Option
DIN-
Flange
ANSI-
Flange
(only on
request
add option letter to order number
))
A15
Option »B«
borosilicate glass, graphite-sealing
Option »P«
25 bar for DAK-22... and DAK-23...
Option »Q«
40 bar for DAK-22... and DAK-23...
Connection Option
G-
thread
Connection Option
DIN-
flange
NPT-
thread*
ANSI-
Flange
(only on
request
add option letter to order number
Option »B«
borosilicate glass, graphite-sealing
Option »P«
25 bar for DAT-12... and DAT-13...
Option »Q«
40 bar for DAT-12... and DAT-13...
add option letter to order number
Option »B«
borosilicate glass, graphite-sealing
Option »P«
25 bar for DAT-22... and DAT-23...
Option »Q«
40 bar for DAT-22... and DAT-23...
DAR K01/0507 page 11
Page 12
DAR/DAT/DAK
9. Maintenance
KOBOLD Sight Glasses do not require a special maintenance.
• If the glass plates should be dirty at the outside, they can be cleaned carefully.
The glass surface may not be scratched under any circumstances (stability
loss!). Commercial cleaning agents, especially glass cleaning agents, may be
used. Use only clean and soft cloth!
• Inside dirtying of the glass plates may also be cleaned as described before. If
the dirt sticks so tight on the glass plates that cleaning as described above is
no more successful, the glass plates have to be replaced. Replacement is also
necessary if they are corroded by flow or aggressive medium and show an
erosive surface (stability loss!). When assembling the cleaned or replaced
glass plates, new seals in suitable quality are to be used under all
circumstances. See section 10 (Replacement of glass plates) and item 3.1
(Safety references).
• General references: Although highly resistant, sight glass plates according to
DIN 8902 and DIN 7080 are wearing parts with limited lifespan. This depends
very much on the specific demand on operation. With rising temperature and
rising pH value of the medium the glass erosion increases exponentially. High
glass erosion can have a very negative effect on the operational safety.
Therefore both glass plates and seals are to be replaced if there is
recognisable glass erosion. It is advisable to document the specific period of
use of the glass plates, so that empirical values of the lifespan can be
collected. That way the punctual and routine replacement of the glass plates
can be planned.
page 12 DAR K01/0507
Page 13
DAR/DAT/DAK
10. Replacement of Glass Plates
Attention! All work on glass plates has to be done by trained
personnel in compliance with the safety instructions mentioned in
item 3.1! Glass plates require very careful treatment!
10.1 Disassembly
• Remove the fixing screws of the cover flanges in several steps and crosswise.
• Remove the cover flanges. Remove the glass plates as well as the inside and
outside seals.
• Clean the sealing surface on the body as well as the bearing surface in the
cover flange carefully of sealing remainders and check them for damage
(scores, wash out, impact spots etc.). Both surfaces must be absolutely clean,
flat and without damage!
10.2 New Assembly
• Lay down the new inside seal (on the body side) and the new glass plate of
correct size and quality exactly centrically. The seal may not project in the view
diameter d1. The glass plate has to show a constant gap of approx. 1 to
1.5mm at the complete outside diameter. A contact between a glass plate and
the metal body must be avoided under any circumstances! This would lead to
damage and total breakdown of the glass plate due to different extension
coefficients.
• Lay down the outside seal (on the cover side) and the cover flange exactly
centrically on the glass plate. Between glass plate and cover flange the gap of
approx. 1 to 1.5 mm mentioned above must also be absolutely guaranteed.
• Screw in the fixing screws carefully and tighten them gently by hand. While
doing so, all seals and the cover flange may not shift! Threads and bearing
surfaces of the fixing screws have to be lubricated with temperature resistant
thread paste (e.g. OKS ANTI-Seize-Paste) before screwing in to avoid seizing
of materials and to guarantee defined friction values.
DAR K01/0507 page 13
Page 14
DAR/DAT/DAK
• Now tighten all screws in several little
steps and crosswise (acc. to the
opposite picture) with a torque wrench
to the torques mentioned in the below
chart. All screws must show exactly the
same torque to avoid glass tensions.
Torques of cover flange screws [in Nm ] for lubricated screws and for standard
seals made of graphite with stainless steel reinforcement:
Glass Ø
d2 in mm
45 32 10 12 -- -- -- -63 48 12 20 23 -- -- --
80 65 -- 23 30 -- 40 -100 80 -- -- 42 -- 70 35
125 100 -- -- -- 65 -- 50
150 125 -- -- -- -- 100 60
175 150 -- -- -- -- -- 80
200 175 -- -- -- -- -- 90
Correction values for other sealing materials:
PTFE: above mentioned values x 0.5
Aramide fibre: above mentioned values x 0.7
FPM, Silicone, EPDM etc.: above mentioned values x 0.6
Other materials: on request
• Second opposite glass plate side is to be disassembled and assembled again
as described above.
• Finally the sight glass fitting is to be checked for leak tightness (e.g. with
compressed air/gas of approx. 2 bar under water).
• After first restarting the cover flange screws must be controlled absolutely as
described in item 6.2 in cold and pressureless conditions to compensate for
the “settling” of new seals.
View Ø
d1 in mm
4xM8 4x M10 4x M12 4xM14 4x M14 8x M16
page 14 DAR K01/0507
Page 15
DAR/DAT/DAK
11. Dimensions
DAR-1.....
Dimensions for pressure rating PN 16
DAR-2....
Dimensions for pressure rating PN 16
DN
15 95 130 32 45 10 3,4 4,2
20 105 150 32 45 10 4,2 4,3
25 115 160 48 63 10 4,5 6,6
32 140 180 65 80 12 8,4 8,4
40 150 200 65 80 12 8,4 8,6
50 165 230 80 100 15 12,9 11,1
65 185 290 80 100 15 22,7 23,1
80 200 310 100 125 20 21,0 19,6
100 220 350 125 150 25 35,1 36,1
125 250 400 150 175 25 47,1 47,1
150 285 480 175 200 25** 56,1 56,1
200 340 600 175 200 25** 98,0 98,1
** with soda lime glass only PN 10, PN 16 with option »B« possible
Dimensions (material grey cast iron) for pressure
rating PN 16
Glass
G
G 1/4
G 3/8
G 1/2
G 3/4
G 1
G 11/4
G 11/2
G2 180 80 100 15 6,8 kg
Dimensions (material cast steel or stainless steel) for
pressure rating PN 16 (PN 25/ PN 40 on request)
G
G 1/4
G 3/8
G 1/2
G 3/4
G 1
G 11/4
G 11/2 150 65 80 12 4,7 kg
G 2 230 80 100 15 7,7 kg
BL
[mm]
100 32 45 10 1,8 kg
120 45 63 10 2,6 kg
150 65 80 12 5,3 kg
BL
[mm]
100 45 63 10 2,3 kg
130 65 80 12 4,1 kg
d1
[mm]
d1
[mm]
d2
[mm]
d2
[mm]
thickness
(S) at PN 16
[mm]
Glass
thickness
(S) at PN 16
[mm]
Approx.
weight
DAR-11 ...
Approx.
weight
DAR-12...
DAR-13...
Approx. weight
[kg]
DAR 21...
DAR-22...
DAR-23...
D
[mm]
BL
[mm]
d1
[mm]
d2
[mm]
Glass
thickness
(S) at PN 16
[mm]
DAR K01/0507 page 15
Page 16
DAR/DAT/DAK
DAK-1...
Dimensions for pressure rating PN 16
DAK-2...
Dimensions for pressure rating PN 16
Dimensions (material grey cast iron) for pressure
rating PN 16
Glass
G
G 1/4
G 3/8
G 1/2
G 3/4
G1
G 11/4
G11/2
G 2 180 80 100 15 6,8 kg
BL
[mm]
100 32 45 10 1,8 kg
120 45 63 10 2,6 kg
150 65 80 12 5,3 kg
d1
[mm]
d2
[mm]
thickness
(S) at PN 16
[mm]
Approx.
weight
DAK-11...
Dimensions (material cast steel or stainless steel)
for pressure rating PN 16 (PN 25/PN 40 on request)
Glass
G
G 1/4
G 3/8
G 1/2
G 3/4
G 1
G 11/4
G 11/2 150 65 80 12 4,7 kg
G 2 230 80 100 15 7,7 kg
BL
[mm]
100 45 63 10 2,3 kg
130 65 80 12 4,1 kg
d1
[mm]
d2
[mm]
thickness
(S) at PN 16
[mm]
Approx.
weight
DAK-12...
DAK-13...
Glass
D
DN
[mm]
15 95 130 32 45 10 3,4 4,2
20 105 150 32 45 10 4,2 4,3
25 115 160 48 63 10 4,5 6,6
32 140 180 65 80 12 8,4 8,4
40 150 200 65 80 12 8,4 8,6
50 165 230 80 100 15 12,9 11,1
65 185 290 80 100 15 22,7 23,1
80 200 310 100 125 20 21,0 19,6
100 220 350 125 150 25 35,1 36,1
125 250 400 150 175 25 47,1 47,1
150 285 480 175 200 25** 56,1 56,1
200 340 600 175 200 25** 98,0 98,1
*Pressure rating PN 25 / PN 40 on request!
** with soda lime glass only PN 10, PN 16 with option »B« possible
BL
[mm]
d1
[mm]
[mm]
d2
thickness
(S)
at PN 16*
[mm]
Approx. weight
[kg]
DAK 21...
DAK-22...
DAK-23...
page 16 DAR K01/0507
Page 17
DAR/DAT/DAK
DAT-1...
Dimensions for pressure rating PN 16
Dimensions (material grey cast iron) for pressure
rating PN 16
Glass
G
G 1/4
G 3/8
G 1/2
G 3/4
G 1
G 11/4
G 11/2
G 2 180 80 100 15 6,7 kg
Dimensions (material cast steel or stainless steel) for
pressure rating PN 16 (PN 25 / PN 40 on request)
BL
[mm]
100 32 45 10 1,7 kg
120 45 63 10 2,5 kg
150 65 80 12 5,2 kg
d1
[mm]
d2
[mm]
thickness
(S) at PN 16
[mm]
Approx.
weight
DAT-11...
G 1/4
G 3/8
G 1/2
G 3/4
G 11/4
G 11/2 150 65 80 12 4,6 kg
DAT-2...
Dimensions for pressure rating PN 16
DN
100 220 350 125 150 25 35,0 36,0
125 250 400 150 175 25 47,0 47,0
150 285 480 175 200 25** 56,0 56,0
200 340 600 175 200 25** 98,0 98,0
* Pressure rating PN 25 / PN 40 on request!
** with soda lime glass only PN 10, PN 16 with option »B« possible
D
[mm]
15 95 130 32 45 10 3,3 4,1
20 105 150 32 45 10 4,1 4,2
25 115 160 48 63 10 4,4 6,5
32 140 180 65 80 12 8,3 8,3
40 150 200 65 80 12 8,3 8,5
50 165 230 80 100 15 12,8 11,0
65 185 290 80 100 15 22,6 23,0
80 200 310 100 125 20 29,9 29,5
Glass
G
G 1
G 2 230 80 100 15 7,6 kg
BL
[mm]
100 45 63 10 2,2 kg
130 65 80 12 4,0 kg
BL
[mm]
[mm]
d1
[mm]
d1
[mm]
d2
[mm]
d2
thickness
at PN 16*
thickness
(S) at PN 16
[mm]
Glass
(S)
DAT 21...
[mm]
Approx.
weight
DAT-12...
DAT-13...
Approx. weight
[kg]
DAT-22...
DAT-23...
DAR K01/0507 page 17
Page 18
DAR/DAT/DAK
12. Manufacturer’s Declaration
Manufacturer: Kobold-Messring GmbH
Hofheim/Ts.
Bundesrepublik-Deutschland
Sight Glass Model: DAR, DAT, DAK
The Sight Glasses DAR, DAT, DAK (without integrated electronic equipment) do
not have a potential igniting source of its own, which could cause an explosion.
Therefore these devices do not get any identification according to the ATEXguideline 94/9/EC, article 1. They do not need to be submitted to the procedure of
the EC type examination certificate.
We like to indicate that by mounting the devices to the Ex-area all safety-related
requirements need to be fulfilled and as well as all metallic components they
need to be included to the potential equalisation.
Hofheim, 25. Jan. 2007
H. Peters M. Wenzel
General Manager Proxy Holder
page 18 DAR K01/0507
Page 19
DAR/DAT/DAK
13. Declaration of Conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that for the product:
Sight Glass model: DAR/DAT/DAK-...
the following EEC guideline is fulfilled:
for DAR, DAT, DAK, DN 65, 40 bar
DAR, DAT, DAK, DN 80-125, 40 bar
DAR, DAT, DAK, DN 150-200, 16 bar
97/23/EC PED
Category II, Table 8, pipe, Group 1 dangerous fluids
Module D, mark CE0098
notified body: Germanischer Lloyd Germany
Hofheim, 25. Jan. 2007
H. Peters M. Wenzel
General Manager Proxy Holder
DAR K01/0507 page 19
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