Pressure
Diaphragm seal with threaded connection
Threaded design
Model 990.10
WIKA data sheet DS 99.01
for further approvals
see page 5
Applications
■■ For aggressive, hot, corrosive, environmentally hazardous
or toxic media
■■ Process industry
Special features
■■ Process connection with thread
■■ Version with internal diaphragm, diaphragm seal parts
screwed together
■■ Large selection of process connections and materials
■■ Flushing connections optionally available
Diaphragm seal with threaded connection,
model 990.10
Description
Diaphragm seals are used for the protection of pressure The model 990.10 diaphragm seal with threaded connection
measuring instruments in applications with difficult media. In in threaded design is suitable for versatile application areas.
diaphragm seal systems, the diaphragm of the diaphragm A replacement of the lower body is possible without modifi-
seal effects the separation of the instrument and the medium. cations on the diaphragm seal system. With this diaphragm
The pressure is transmitted to the measuring instrument seal, high pressure ranges up to 250 bar can be covered.
via the system fill fluid which is inside the diaphragm seal
system. Mounting of the diaphragm seal to the measuring instrument
may be made via a direct connection, for high temperatures
For the implementation of demanding customer applications, via a cooling element or via a flexible capillary.
there are a wide variety of designs, materials and system fill
fluids available. For the material selection WIKA offers a variety of solutions,
in which the upper body of the diaphragm seal and the
For further technical information on diaphragm seals and wetted parts can be made of identical or different materials.
diaphragm seal systems see IN 00.06 “Application, operating The wetted parts can, as an alternative, be coated.
principle, designs”.
WIKA data sheet DS 99.01 ∙ 07/2019 Page 1 of 7
Data sheets showing similar products:
Diaphragm seal with threaded connection; model 990.34; see data sheet DS 99.04
Specifications
Model 990.10 Standard Option
Pressure range 0 ... 250 bar [0 ... 3,600 psi]
or all other equivalent vacuum or combined pressure and vacuum ranges
Level of cleanliness of Oil and grease free per ASTM G93-03 Oil and grease free per ASTM G93-03 level D and
wetted parts level F WIKA standard (< 1,000 mg/m²) ISO 15001 (< 220 mg/m2)
Origin of wetted parts International EU, CH, USA
Connection to the Axial adapter Axial adapter with G ½, G ¼, ½ NPT or ¼ NPT (female)
measuring instrument
Type of mounting Direct mounting ■■ Capillary
■■ Cooling element
Sealing PTFE max. 260 °C [500 °F] ■■ Metal C spring, silver-plated stainless steel, max. 400 °C [752 °F]
■■ Metal C spring, Inconel, max. 400 °C [752 °F]
Flushing connection - ■■ Single flushing connection (G ¼, G ⅛, ¼ NPT, ⅛ NPT)
■■ Dual flushing connection (G ¼, G ⅛, ¼ NPT, ⅛ NPT)
■■ Plug screws
Design per NACE - ■■ MR 0175
■■ MR 0103
Vacuum service Basic service ■■ Premium service
(see IN 00.25) ■■ Advanced service
Instrument mounting - ■■ Form H per DIN 16281, 100 mm, aluminium, black
bracket (only for ■■ Form H per DIN 16281, 100 mm, stainless steel
capillary option) ■■ Bracket for pipe mounting, for pipe outer Ø 20 ... 80 mm, steel
(see data sheet AC 09.07)
Example: Diaphragm seal model 990.10 with mounted pressure gauge
Pressure gauge
Not included in Sealing
delivery
Welding socket
Direct mounting
Upper body of diaphragm seal
Mb
Diaphragm (welded to diaphragm seal)
D
Sealing
Lower body of diaphragm seal
14205938.02
Legend:
Mb Effective diameter of diaphragm
D Outer diameter of diaphragm seal
Following DIN ISO 228-1
WIKA data sheet DS 99.01 ∙ 07/2019 Page 2 of 7
Process connection
Standard Male thread Female thread
Standard Option Standard Option
Following DIN ISO 228-1 G½A G¼A G½ G¼
G⅜A G⅜
G¾A G¾
G1A G1
G1½A
Following ASME B 1.20.1 ½ NPT ¼ NPT ½ NPT ¼ NPT
⅜ NPT ⅜ NPT
¾ NPT ¾ NPT
1 NPT 1 NPT
1 ½ NPT
Following DIN 13-1 M20 x 1.5 - M20 x 1.5 -
Following ISO 7-1 R½ R ¼, R ⅜, R ¾ - -
Other process connections on request
WIKA data sheet DS 99.01 ∙ 07/2019 Page 3 of 7
Material combinations
Upper body of diaphragm Wetted parts Maximum permissible
seal process temperature ¹⁾
Lower body of diaphragm Diaphragm in °C [°F]
seal
Stainless steel 1.4404 (316L) Stainless steel 1.4404 (316L) Stainless steel 1.4404 / 1.4435 400 [752]
(316L), standard version
Stainless steel 1.4539 (904L) Stainless steel 1.4539 (904L)
Stainless steel 1.4541 (321) Stainless steel 1.4541 (321)
Stainless steel 1.4571 (316Ti) Stainless steel 1.4571 (316Ti)
PTFE lining ²⁾ ECTFE coating 150 [302]
PTFE lining ²⁾ PFA (perfluoroalkoxy) coating, 260 [500]
FDA
PTFE lining ²⁾ PFA (perfluoroalkoxy) coating,
antistatic
- Gold plating 400 [752]
- Wikaramic® coating
Hastelloy C22 (2.4602) Hastelloy C22 (2.4602) 260 [500]
Hastelloy C276 (2.4819) Hastelloy C276 (2.4819) 400 [752]
Inconel 600 (2.4816) Inconel 600 (2.4816)
Inconel 625 (2.4856) Inconel 625 (2.4856)
Incoloy 825 (2.4858) Incoloy 825 (2.4858)
Monel 400 (2.4360) Monel 400 (2.4360)
Nickel 200 (2.4060, 2.4066) Nickel 200 (2.4060, 2.4066) 260 [500]
Titanium grade 2 (3.7035) Titanium grade 2 (3.7035) 150 [302]
Titanium grade 7 (3.7235) Titanium grade 11 (3.7225)
Tantalum lining ²⁾ Tantalum 300 [572]
Stainless steel 1.4435 (316L) Stainless steel 1.4435 (316L) Stainless steel 1.4435 (316L) 400 [752]
Stainless steel 1.4539 (904L) Stainless steel 1.4539 (904L) Stainless steel 1.4539 (904L)
Stainless steel 1.4541 (321) Stainless steel 1.4541 (321) Stainless steel 1.4541 (321)
Stainless steel 1.4571 (316Ti) Stainless steel 1.4571 (316Ti) Stainless steel 1.4571 (316Ti)
Duplex 2205 (1.4462) Duplex 2205 (1.4462) Duplex 2205 (1.4462) 300 [572]
Superduplex 2507 (1.4410) Superduplex 2507 (1.4410) Superduplex 2507 (1.4410)
Hastelloy C22 (2.4602) Hastelloy C22 (2.4602) Hastelloy C22 (2.4602) 400 [752]
Hastelloy C276 (2.4819) Hastelloy C276 (2.4819) Hastelloy C276 (2.4819)
Inconel 600 (2.4816) Inconel 600 (2.4816) Inconel 600 (2.4816)
Inconel 625 (2.4856) Inconel 625 (2.4856) Inconel 625 (2.4856)
Incoloy 825 (2.4558) Incoloy 825 (2.4858) Incoloy 825 (2.4858)
Monel 400 (2.4360) Monel 400 (2.4360) Monel 400 (2.4360)
Nickel 200 (2.4060, 2.4066) Nickel 200 (2.4060, 2.4066) Nickel 200 (2.4060, 2.4066)
Titanium grade 2 (3.7035) Titanium grade 2 (3.7035) Titanium grade 2 (3.7035)
Titanium grade 7 (3.7235) Titanium grade 7 (3.7235) Titanium grade 11 (3.7225)
1) The maximum permissible process temperature of the diaphragm seal system is limited by the joining method, by the system fill fluid and by the measuring instrument.
2) For G ½ and M 20 x 1.5 (male), max. 0 ... 100 bar
Further material combinations for special process temperatures on request
WIKA data sheet DS 99.01 ∙ 07/2019 Page 4 of 7
Approvals
Logo Description Country
EAC (option) Eurasian Economic Community
Pressure equipment directive
- MTSCHS (option) Kazakhstan
Permission for commissioning
- CRN Canada
Safety (e.g. electr. safety, overpressure, ...)
Certificates (option)
■■ 2.2 test report per EN 10204 (e.g. state-of-the-art
manufacturing, material proof, indication accuracy for
diaphragm seal systems)
■■ 3.1 inspection certificate per EN 10204 (e.g. material
proof for wetted metallic parts, indication accuracy for
diaphragm seal systems)
Approvals and certificates, see website
WIKA data sheet DS 99.01 ∙ 07/2019 Page 5 of 7
Dimensions in mm [in]
Male thread G Dimensions in mm [in]
Threaded connection
h h₁ Mb SW
G¼A 13 [5.512] 29.5 [1.161] 52 [2.047] 27 [1.063]
G⅜A 16 [0.63] 32.5 [1.28]
G½A 20 [0.787] 36.5 [1.437]
G¾A 43 [1.693] 41 [1.614]
G1A 28 [1.102] 51 [2.008]
G1½A 58.5 [2.303]
¼ NPT 13 [5.512] 29.5 [1.161] 27 [1.063]
⅜ NPT 15 [0.591] 31.5 [1.24]
½ NPT 19 [0.748] 35.5 [1.398]
¾ NPT 20 [0.787] 36.5 [1.437]
14265316.01
1 NPT 25 [0.984] 48 [1.98] 41 [1.614]
Threaded connections: 1 ½ NPT 26 [1.024] 56.5 [2.224]
4x to 100 bar
8x 101 ... 250 bar M20 x 1.5 20 [0.787] 36.5 [1.437] 27 [1.063]
8x with metal sealing to 250 bar R¼ 15 [0.591] 31.5 [1.28]
Legend: R⅜ 18 [0.709] 34.5 [1.358]
Mb Diameter of diaphragm
R½ 19 [0.748] 35.5 [1.398]
G Thread
SW Spanner width R¾ 20 [0.787] 36.5 [1.437]
Female thread G Dimensions in mm [in]
Threaded connection h h1 Mb SW
G¼ 10 [0.394] 16.5 [0.65] 52 [2.047] 27 [1.063]
G⅜ 12 [0.472]
G½ 14 [0.551]
G¾ 16 [0.63] 22.5 [0.886] 32 [1.26]
G1 18 [0.709] 24.5 [0.965] 41 [1.614]
¼ NPT - 16.5 [0.65] 27 [1.063]
⅜ NPT
½ NPT
¾ NPT 20.5 [0.807] 32 [1.26]
14272460.01
Threaded connections:
4x to 100 bar 1 NPT 28.5 [1.122] 41 [1.614]
8x 101 ... 250 bar M20 x 1.5 15.5 [0.61] 18.5 [0.728] 27 [1.063]
8x with metal sealing to 250 bar
Legend:
Mb Diameter of diaphragm
G Thread
SW Spanner width
WIKA data sheet DS 99.01 ∙ 07/2019 Page 6 of 7
Ordering information
Diaphragm seal:
Diaphragm seal model / Process connection (process connection standard, thread, nominal pressure rating) / Material
(upper body, diaphragm, lower body) / Sealing / Retainer parts (retainer flange, screws) / Flushing connection (plug screw) /
Connection to the measuring instrument / Level of cleanliness of wetted parts / Origin of wetted parts / Certificates
Diaphragm seal system:
Diaphragm seal model / Process connection (process connection standard, thread, nominal pressure rating) / Material (upper
body, diaphragm, lower body) / Sealing / Retainer parts (retainer flange, screws) / Flushing connection (plug screw) / Pressure
measuring instrument model (per data sheet) / Mounting (direct mounting, cooling element, capillary) / min. and max. process
temperature / min. and max. ambient temperature / Vacuum service / System fill fluid / Certificates / Height difference / Level of
cleanliness of wetted parts / Origin of wetted parts / Instrument mounting bracket
© 02/2013 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.
07/2019 EN
WIKA data sheet DS 99.01 ∙ 07/2019 Page 7 of 7
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
