Level

External chamber
For level measurement with inserted sensors
Model BZG
WIKA data sheet LM 11.01

Applications■■ Level detection for almost all liquid media■■ Individual design and corrosion-resistant materials makethe products suitable for a broad range of applications■■ Chemical industry, petrochemical industry, oil and natural

gas extraction (on- and offshore), shipbuilding, machinebuilding, power generating equipment, power plants

Special features■■ Process- and procedure-specific production■■ Operating limits:- Operating temperature: T = -196 ... +450 °C- Operating pressure:
P = Vacuum up to 400 bar■■ Wide variety of different process connections and materials■■ Mounting of level sensors and guided wave radars
possible as an option

Description
The external chamber model BZG consists of an external
chamber vessel that is mounted laterally to a vessel using
at least 2 process connections (flange, thread or weld stub).
Through this type of arrangement, the level in the external
chamber corresponds to the level in the vessel.
The level is measured by a measuring instrument inserted
additionally in the external chamber, for example model FLRor FLS, or by a guided wave radar.

WIKA data sheet LM 11.01 ∙ 03/2019
Data sheets showing similar products and accessories:
Bypass level indicator; model BNA; see data sheet LM 10.01
Level sensor with reed measuring chain; model FLR; see data sheet LM 20.02
Float switches for the process industry; model FLS; see data sheet LM 30.01

External chamber, model BZG

Page 1 of 11Model overview
ModelDescription

Materials

Max. operatingpressure in bar

BZG-S

Standard version

Stainless steel 1.4571 (316Ti)

64 bar-196 ... +450 °C

BZG-HHigh-pressure version

Stainless steel 1.4571 (316Ti)

400 bar-196 ... +450 °C

BZG-K

Steel version

Steel 1.0345/1.0460

Stainless steel 1.4401/1.4404 (316/316L)
Stainless steel 1.4401/1.4404 (316/316L)
Steel 1.5415 (16Mo3)

Special material version-196 ... +450 °C

400 bar-196 ... +450 °C

250 bar-10 ... +400 °C

250 barA105/A106 Gr. B
BZG-X

64 bar

-10 ... +400 °C

255 bar

A350 LF2/A333 Gr. 6

250 bar

Duplex 1.4462 (UNS S31803)

430 barStainless steel 1.4306 (304L)

Super Duplex 1.4410 (UNS S3850)
Titanium 3.7035 (grade 2)
Hastelloy C276 (2.4819)-29 ... +400 °C

255 barStainless steel 6Mo 1.4547 (UNS S31254)

Max. operating
temperature in °C-46 ... +425 °C-29 ... +400 °C

41 bar-196 ... +450 °C-40 ... +300 °C

430 bar-40 ... +300 °C

78 bar-60 ... +300 °C

430 bar-196 ... +500 °C

Other materials on request

Design codes available■■ AD2000■■ ASME B31.3■■ NORSOK■■ EN 13445

CE classification
ModelPED---

BZG-SA1, BZG-HA1, BZG-XA1, BZG-KA1xx

Module ABZG-SA2, BZG-HA2, BZG-XA2, BZG-KA2xx

Module A2

BZG-SBC, BZG-HBC, BZG-XBC, BZG-KBC

xx

Module B + C2

BZG-SBD, BZG-HBD, BZG-XBD, BZG-KBD

x

x

Module B + D

BZG-SGE, BZG-HGE, BZG-XGE, BZG-KGE

x

x

Module G

BZG-S00, BZG-H00, BZG-X00, BZG-K00

CE

PED module used

Approvals
Logo

Description

Country

EAC
Pressure equipment directive
No. RU D-DE.MJU62.B.02027

Eurasian Economic Community

EU declaration of conformity
Pressure equipment directive (option)European Union

Approvals and certificates, see website

WIKA data sheet LM 11.01 ∙ 03/2019

Page 2 of 11External chamber, standard version
Model BZG-S

External chamber and process connections made of stainless steel
Specifications

X = ...

T = ...

Chamber end top

M = ...

Chamber end bottom

Process connections

Flange■■ DIN EN 1092-1 DN 50 ... DN 100,PN 6 ... PN 63■■ DIN DN 50 ... DN 100, PN 6 ... PN 64■■ ANSI B 16.5 2" ... 4",class 150 ... 600■■ Threaded bushing G / NPT 3/4" ... 2"

Flange connection or pipe cap■■ Drain plug■■ Drain valve■■ Drain flange
Options see page 92 x lateral (options see page 10)
Flange■■ DIN EN 1092-1 DN 10 ... DN 100,PN 6 ... PN 63■■ DIN DN 10 ... DN 100, PN 6 ... PN 64■■ ANSI B 16.5 ½" ... 4",

U = ...

class 150 ... 600

Z = ...

Centre-to-centre
distanceY
270° / 9.00

90° / 3.00

Option with vent

180° / 6.00

≥ 150 ... ≤ 6,000 mm(larger distances on request)

Material■■ Stainless steel 1.4571 (316Ti)■■ Stainless steel 1.4401/1.4404

Max. nominal pressure64 bar

X20° / 12.00

Weld stub ½" ... 1"
Threaded bushing G / NPT ½" ... 1"
Threaded nipple G / NPT ½" ... 1"(316/316L)

Temperature range■■ Stainless steel 1.4571 -120 … +400 °C(316Ti)■■ Stainless steel-196 … +450 °C
1.4401/1.4404(316/316L)
Special versions on request

Chamber dimensions
Dimensions in mm

Stainless steel 1.4571 (316Ti)

Stainless steel 1.4401/1.4404 (316/316L)

60.3 x 2.77xx

60.3 x 2

88.9 x 2

88.9 x 3.05
114.3 x 2.6

114.3 x 3.05WIKA data sheet LM 11.01 ∙ 03/2019

xxxxxxx

Page 3 of 11External chamber, high-pressure version
Model BZG-H

External chamber and process connections made of stainless steel
Specifications

X = ...

T = ...

Chamber end top

M = ...

Chamber end bottom

Process connections

Flange■■ DIN EN 1092-1 DN 50 ... DN 100,
PN 100 ... PN 400■■ DIN DN 50 ... DN 100,
PN 100 ... PN 400■■ ANSI B 16.5 2" ... 4",class 600 ... 2,500■■ Threaded bushing G / NPT 3/4" ... 2"

Flange connection or pipe cap■■ Drain plug■■ Drain valve■■ Drain flange
Options see page 9

2 x lateral (options see page 10)
Flange■■ DIN EN 1092-1 DN 10 ... DN 100,

PN 100 ... PN 400■■ DIN DN 10 ... DN 100,

PN 100 ... PN 400■■ ANSI B 16.5 ½" ... 4",
U = ...

class 600 ... 2,500

Z = ...

Centre-to-centre
distance
MaterialYX2

0° / 12.00

270° / 9.00

90° / 3.00

Option with vent

180° / 6.00

60.3 x 3.91

60.3 x 5.54xx88.9 x 4.5x

88.9 x 7.62

x88.9 x 5.49
88.9 x 11

88.9 x 11.13

x114.3 x 4x

114.3 x 7.1x

114.3 x 6.02
114.3 x 8.56

114.3 x 11.13
WIKA data sheet LM 11.01 ∙ 03/2019■■ Stainless steel 1.4571 (316Ti)■■ Stainless steel 1.4401/1.4404(316/316L)

Max. nominal pressure 400 bar

Temperature range■■ Stainless steel 1.4571 -120 … +400 °C(316Ti)■■ Stainless steel-196 … +450 °C
1.4401/1.4404(316/316L)

Stainless steel 1.4571 (316Ti)

60.3 x 8

60.3 x 8.74

≥ 150 ... ≤ 6,000 mm(larger distances on request)

Special versions on request

Chamber dimensionsDimensions in mm

Weld stub ½" ... 1"
Threaded bushing G / NPT ½" ... 1"
Threaded nipple G / NPT ½" ... 1"

Stainless steel 1.4401/1.4404 (316/316L)
xxxxxxxxx
Page 4 of 11External chamber, steel version
Model BZG-K

External chamber and process connections made of steel
Specifications

X = ...

T = ...

Chamber end top

Chamber end bottom

M = ...

Process connections

Flange■■ DIN EN 1092-1 DN 50 ... DN 100,
PN 16 ... PN 400■■ DIN DN 50 ... DN 100,
PN 16 ... PN 400■■ ANSI B 16.5 2" ... 4",class 150 ... 2,500

Flange connection or pipe cap■■ Drain plug■■ Drain valve■■ Drain flange
Options see page 9

2 x lateral (options see page 10)
Flange■■ DIN EN 1092-1 DN 10 ... DN 50,

PN 16 ... PN 400■■ DIN DN 10 ... DN 50, PN 16 ... PN 400■■ ANSI B 16.5 ½" ... 4",

U = ...

class 150 ... 2,500

Centre-to-centre
distance

Z = ...

Material

YX2

0° / 12.00

270° / 9.00

90° / 3.00

180° / 6.00

Option with vent

Weld stub ½" ... 1"
Threaded bushing G / NPT ½" ... 1"
Threaded nipple G / NPT ½" ... 1"≥ 150 ... ≤ 6,000 mm(larger distances on request)■■ Steel 1.0345/1.0460■■ Steel 1.5415 (16Mo3)■■ Steel A105/A106 Gr.B■■ Steel A350 LF2/A333 Gr. 6

Max. nominal pressure■■ Steel 1.0345/1.0460, 250 bar
1.5415 (16Mo3)■■ Steel A105/A106
255 barGr. B, A350 LF2/A333
Gr. 6
Temperature range■■ Steel 1.0345/1.0460,-10 … +400 °C
1.5415 (16Mo3)■■ Steel A105/A106 Gr. B -29 … +400 °C■■ Steel A350 LF2/A333 -46 … +425 °C
Gr. 6
Special versions on request
Paintings on request

WIKA data sheet LM 11.01 ∙ 03/2019

Page 5 of 11

Chamber dimensions model BZG-K (made of steel)
Dimensions in mm

Steel 1.0345/1.0460

Steel 1.5415 (16Mo3)

60.3 x 3.6xx

60.3 x 4xx

60.3 x 5.6xx

60.3 x 3.91
60.3 x 5.54
60.3 x 7.1

60.3 x 8.74
60.3 x 8.8

60.3 x 11.07xxxx

73 x 5.16

76.1 x 3.6xx

76.1 x 7.1xx

76.1 x 1076.1 x 14.2xxxxxx

88.9 x 8xx

88.9 x 11xx88.9 x 8.888.9 x 11.13
88.9 x 15.24
88.9 x 16xx114.3 x 6.3xx114.3 x 11x

x114.3 x 8.8
114.3 x 11.13
114.3 x 13.49x

114.3 x 14.2x

114.3 x 17.5x

114.3 x 17.12xxx

x

WIKA data sheet LM 11.01 ∙ 03/2019

xxx
xxx

x

x

xx

x

x

x

x

x

xx

x
x

114.3 x 6.02xx

x

114.3 x 4.5xx88.9 x 5.6

88.9 x 7.62xxx

88.9 x 5.49x

xx

88.9 x 4x

x

73 x 9.53

76.1 x 8xx

73 x 7.01

76.1 x 5.6

Steel A350 LF2/A333
Gr. 6x

73 x 3.05

73 x 14.02

Steel A105/A106
Gr. Bxxxxx

Page 6 of 11External chamber, special material version
Model BZG-X

External chamber and process connections made of austenitic and ferritic stainless steel
Specifications

X = ...

Chamber end topFlange■■ DIN EN 1092-1 DN 50 ... DN 100,

PN 63 ... PN 400

T = ...

■■ DIN DN 50 ... DN 100,

PN 64 ... PN 400■■ ANSI B 16.5 2" ... 4",

Chamber end bottom

M = ...

Process connectionsclass 600 ... 2,500

Flange connection or pipe cap■■ Drain plug■■ Drain valve■■ Drain flange
Options see page 9

2 x lateral (options see page 10)
Flange■■ DIN EN 1092-1 DN 10 ... DN 100,

PN 63 ... PN 400■■ DIN DN 10 ... DN 100,

PN 64 ... PN 400■■ ANSI B 16.5 ½" ... 4",class 600 ... 2,500

U = ...

Weld stub ½" ... 1"
Threaded bushing G / NPT ½" ... 1"
Threaded nipple G / NPT ½" ... 1"

Z = ...

Centre-to-centre distance ≥ 150 ... ≤ 6,000 mm(larger distances on request)
MaterialX2(UNS S31803)■■ Stainless steel Super Duplex

Y0° / 12.00

90° / 3.00

Option with vent

180° / 6.00

(UNS S31254)■■ Stainless steel Duplex 1.4462

Max. nominal pressure
270° / 9.00■■ Stainless steel 6Mo 1.4547

Temperature range■■ Stainless steel 6Mo
1.4547■■ Stainless steel Duplex
1.4462■■ Stainless steel SuperDuplex 1.4410

1.4410 (UNS S32750)

258 bar-196 … +450 °C-40 … +300 °C-40 … +300 °C

Special versions on request

Chamber dimensions
Dimensions in mm
60.3 x 2.77

60.3 x 3.91

60.3 x 5.54

88.9 x 3.05

114.3 x 3.05

WIKA data sheet LM 11.01 ∙ 03/2019

Stainless steel 6Mo
1.4547 (UNS S31254)
xxxxx

Stainless steel Duplex
1.4462 (UNS S31803)
xxx

xx

Stainless steel Super Duplex
1.4410 (UNS S32750)
xxxx

xPage 7 of 11External chamber, special material version
Model BZG-X

External chamber and process connections made of stainless steel / titanium / Hastelloy
Specifications

X = ...

Chamber end topFlange■■ DIN EN 1092-1 DN 50 ... DN 100,PN 6 ... PN 400

T = ...

■■ DIN DN 50 ... DN 100,

PN 6 ... PN 400■■ ANSI B 16.5 2" ... 4",

M = ...

Chamber end bottom

Process connections

2 x lateral (options see page 10)■■ Stainless steel 1.4306

Flange■■ DIN EN 1092-1 DN 10 ... DN 100,
PN 6 ... PN 63■■ DIN DN 10 ... DN 100,
PN 6 ... PN 64■■ ANSI B 16.5 ½" ... 4",class 150 ... 600(304L), titanium 3.7035,■■ Hastelloy C276 (2.4819)

U = ...

class 150 ... 2,500

Flange connection or pipe cap■■ Drain plug■■ Drain valve■■ Drain flangeOptions see page 9Flange■■ DIN EN 1092-1 DN 10 ... DN 100,

PN 6 ... PN 160■■ DIN DN 10 ... DN 100,

PN 6 ... PN 160

Z = ...

■■ ANSI B 16.5 ½" ... 4",class 150 ... 900

Centre-to-centre distance ≥ 150 ... ≤ 6,000 mm(larger distances on request)

X2

YMaterial

Max. nominal pressure■■ Stainless steel 1.4306(304L)■■ Titanium 3.7035■■ Hastelloy C276 (2.4819)

0° / 12.00

270° / 9.00

90° / 3.00

Option with vent

180° / 6.00

Temperature range■■ Stainless steel 1.4306(304L)■■ Titanium 3.7035■■ Hastelloy C276 (2.4819)■■ Stainless steel 1.4306 (304L)■■ Titanium 3.7035■■ Hastelloy C276 (2.4819)

41.4 bar
64 bar160 bar-196 ... +450 °C-10 ... +300 °C-196 ... +500 °C

Special versions on request

Chamber dimensions
Dimensions in mm

Titanium 3.7035

Hastelloy C276 (2.4819)

Stainless steel 1.4306 (304L)

60.3 x 2.77xxx

60.3 x 2

60.3 x 3.91
88.9 x 3.05

114.3 x 3.05

WIKA data sheet LM 11.01 ∙ 03/2019xxxx

Page 8 of 11

Options for chamber ends
Chamber end top (examples)

Flange connection

Threaded connection

Vent (examples)

Weld stub

Vent plug G / NPT ½

Flange connection

Chamber end bottom (examples)

Pipe cap without drain

Pipe cap with drain plug
G / NPT ½"

Pipe cap with drain flange

Pipe cap with drain valve

Flange connection

Other options on request

WIKA data sheet LM 11.01 ∙ 03/2019

Page 9 of 11

Options for process connection
Process connection (examples)

Welding neck flange

Blind flange

Threaded coupling GN ...
(Male thread)

Threaded coupling GM ...
(Female thread)Weld stub S ...

Complete instrument (examples)

Vertical flange connection (top)Process connections 2 x lateral
Pipe cap with vertical drain flange (bottom)

Vertical flange connection (top)Process connections 1 x lateral
Vertical flange connection (bottom)

Vertical threaded connection (top)Process connections 2 x lateral
Pipe cap with vertical drain plug(bottom)

Other connections on request

WIKA data sheet LM 11.01 ∙ 03/2019

Page 10 of 11

Selectable tests■■ Hydrostatic pressure test■■ X-ray testing (RT)■■ Dye penetrant test (PT)■■ Visual testing (VT)■■ Positive material identification test (PMI)

Other tests on request

Ordering information
Model / Material / Process specifications (operating temperature and pressure) / Process connection / Centre-to-centre
distance M ...
Detailed information on sensors (reed chain and magnetostrictive) can be found in the following data sheets:■■ Level sensor, magnetostrictive high-resolution measuring principle; model FLM; see data sheet LM 20.01■■ Level sensor, with reed measuring chain; model FLR; see data sheet LM 20.02

03/2019 EN© 02/2015 WIKA Alexander Wiegand SE & Co. KG, all rights reserved.
The specifications given in this document represent the state of engineering at the time of publishing.
We reserve the right to make modifications to the specifications and materials.

WIKA data sheet LM 11.01 ∙ 03/2019

Page 11 of 11

WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/GermanyTel.
+49 9372 132-0
Fax+49 9372 132-406
info@wika.de
www.wika.de