WIKA · Pressure measurement · Family 990
Diaphragm Seals
For the pulp and paper industry
Range
0…40 bar
EACCRNMTSCHS
Price
On request
Depends on configuration
Description
Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal effects the separation of the instrument and the medium. The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.
For the implementation of demanding customer applications, there are a wide variety of designs, materials and system fill fluids available.
For further technical information on diaphragm seals and diaphragm seal systems see IN 00.06 'Application, operating principle, designs'.
Special features
- Rotatable retainer flange
- Versions with 90° pipe elbow and vibration damper
Identification
| Model | 990.23 |
| Product family | 990 |
| Subcategory | Diaphragm seal |
Measuring range
| Pressure ranges | 0…0.6 bar · 0…40 bar · 0…8.7 psi · 0…580 psi |
Process conditions
| Process temperature | −20…+400 °C |
Materials
| Case material | Stainless steel 1.4404 (316L), Stainless steel 1.4541 (321), Stainless steel 1.4571 (316Ti), Duplex 2205 (1.4462), Monel 400 (2.4360), Stainless steel 1.4435 (316L), 1.4404 (316L), 1.4435 (316L), 1.4462 (2205), 2.4360 (Monel 400), 1.4541 (321), 1.4571 (316Ti) |
| Wetted parts material | Duplex 2205 (1.4462), Monel 400 (2.4360), PFA (perfluoroalkoxy) coating, Stainless steel 1.4435 (316L), Stainless steel 1.4541 (321), Stainless steel 1.4571 (316Ti), Ceramic coating wikaramic®, ECTFE coating, Stainless steel 1.4404 / 1.4435 (316L), Ceramic coating, wikaramic, FDA PFA (perfluoroalkoxy) coating, antistatic ECTFE coating, 1.4404 (316L), 1.4435 (316L), PFA (perfluoroalkoxy) coating, FDA, PFA (perfluoroalkoxy) coating, antistatic |
| Sealing material | Perbunan |
Certifications and approvals
| Certifications | EACCRNMTSCHS |
Additional details
| Datasheet languages | EN, DE |
Tables from datasheet
| Model 990.23 | Standard | Option |
|---|---|---|
| Pressure range | 0 ... 0.6 to 0 ... 40 bar (0 ... 8.7 to 0 ... 580 psi) | |
| Level of cleanliness of wetted parts | Oil and grease free per ASTM G93-03 level F WIKA standard (< 1,000 mg/m²) | ■ Oil and grease free per ASTM G93-03 level D and ISO 15001 (< 220 mg/m 2 ) ■ Oil and grease free per ASTM G93-03 level C and ISO 15001 (< 66 mg/m²) |
| Origin of wetted parts | International | EU, CH, USA |
| Extension length | 6.5 mm(0.256 in) | 17 mm(0.669 in) |
| Connection to the measuring instrument | Axial weld-in connection | Axial weld-in connection with G½, G1/4, ½NPTor 1/4 NPT (female) |
| Type of mounting | Direct mounting | ■ 90° pipe elbow, rotatable through 180° ■ 90° pipe elbow, fixed ■ 90° pipe elbow and vibration damper, rotatable through 180° ■ 90° pipe elbow and vibration damper, fixed ■ Capillary ■ Cooling element |
| Retainer flange | Stainless steel | - |
| Accessories | - | ■ Welding socket for integration into the process line, see data sheet AC 09.20 ■ Perbunan sealing |
| Upper body of diaphragm seal | Wetted parts | Maximum permissible process temperature ¹⁾ in °C (°F) |
|---|---|---|
| Stainless steel 1.4404 (316L) | Stainless steel 1.4404 / 1.4435 (316L), standard version | 400 (752) |
| Ceramic coating wikaramic ® | ||
| PFA (perfluoroalkoxy) coating, FDA | 260 (500) | |
| PFA (perfluoroalkoxy) coating, antistatic | ||
| ECTFE coating | 150 (302) | |
| Stainless steel 1.4435 (316L) | Stainless steel 1.4435 (316L) | 400 (752) |
| Stainless steel 1.4541 (321) | Stainless steel 1.4541 (321) | |
| Stainless steel 1.4571 (316Ti) | Stainless steel 1.4571 (316Ti) | |
| Duplex 2205 (1.4462) | Duplex 2205 (1.4462) | 300 (572) |
| Monel 400 (2.4360) | Monel 400 (2.4360) | 400 (752) |
| NS | H |
|---|---|
| 63 (2.48) | 120 (4.724) |
| 100 (3.937) | 140 (5.512) |
| 160 (6.299) | 170 (6.693) |
| Dimensions | in mm(in) |
|---|---|
| NS | H |
| 63 (2.48) | 145 (5.709) |
| 100 (3.937) | 165 (6.496) |
| 160 (6.299) | 195 (7.677) |
View all (9)
| Dimensions | in mm(in) |
|---|---|
| NS | H |
| 63 (2.48) | 142 (5.591) |
| 100 (3.937) | 162 (6.378) |
| 160 (6.299) | 192 (7.559) |
| Logo | Description | Country |
|---|---|---|
| EAC (option) Pressure equipment directive | Eurasian Economic Community | |
| - | CRN Safety (e.g. electr. safety, overpressure, ...) | Canada |
| - | MTSCHS (option) Permission for commissioning | Kazakhstan |
| Material | Unified numbering system (UNS) |
|---|---|
| Stainless steel 316L (1.4404 or 1.4435) | S31603 |
| Stainless steel 904L (1.4539) | N08904 |
| Stainless steel 321 (1.4541) | S32100 |
| Stainless steel 316Ti (1.4571) | S31635 |
| Stainless steel 1.4466 (urea grade) | S31050 |
| Duplex 2205 (1.4462) | S31803 |
| Superduplex 1.4410 | S32750 |
| Tantalum (also lining) | R05200 |
| Hastelloy C276 (2.4819) | N01276 |
| Hastelloy C22 (2.4602) | N06022 |
| Inconel 600 (2.4816) | N06600 |
| Incoloy 825 (2.4858) | N08825 |
| Inconel 625 (2.485) | N06625 |
| Monel 400 (2.4360) | N04400 |
| Nickel 200 (2.4066) | N02200 |
| Nickel 201 (2.4068) | N02201 |
| Titanium 3.7035 (class 2) | R50400 |
| Titanium 3.7235 (class 7) | R52400 |
| Zirconium GR702 | R60702 |
| Designation | Identi- fication number | Solidi- fication point | Boiling/ degradation point | Density at 25 °C | Kin.Viscosity at 25 °C | Remark |
|---|---|---|---|---|---|---|
| KN | °C | °C | g/cm³ | cSt | ||
| Silicone oil | 2 | -45 | +300 | 0.96 | 54.5 | Universal application |
| Glycerine | 7 | -35 | +240 | 1.26 | 759.6 | FDA 21 CFR 182.1320 |
| Silicone oil | 17 | -90 | +200 | 0.92 | 4.4 | Low temperatures |
| Halocarbon | 21 | -60 | +175 | 1.89 | 10.6 | Oxygen 1) and chlorine |
| Methylcyclopentane | 30 | -130 | +60 | 0.74 | 0.7 | For very low temperatures |
| High-temperature silicone oil | 32 | -25 | +400 | 1.06 | 47.1 | For high temperatures |
| Neobee® M-20 | 59 | -35 | +260 | 0.92 | 10.0 | FDA 21 CFR 172.856, 21 CFR 174.5 |
| DI water | 64 | +4 | +85 | 1.00 | 0.9 | For ultrapure media |
| Silicone oil | 68 | -75 | +250 | 0.93 | 10.3 | |
| DI water/propanol mixture | 75 | -30 | +60 | 0.92 | 3.6 | For ultrapure media |
| Medicinal white mineral oil | 92 | -15 | +260 | 0.85 | 45.3 | FDA 21 CFR 172.878, 21 CFR 178.3620(a); USP, EP, SP |
| Maximum temperature | Maximum oxygen pressure |
|---|---|
| to 60 °C | 50 bar |
| > 60 °C to 100 °C | 30 bar |
| > 100 °C to 175 °C | 25 bar |
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