WIKA · Pressure measurement · Family 990
Diaphragm seal for flange connection
Thread-type with extended diaphragm, urea applications
Range
0…292 bar
EN 10204
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'.
1) Snamprogetti ® is a registered trademark of Saipem S.p.a.
Special features
- Threaded diaphragm seal with extended welded diaphragm
- Special steel alloy for urea synthesis
- Dimensions following Snamprogetti ® standard (Snamprogetti ® is a registered trademark of Saipem S.p.a.)
Identification
| Model | 990.49 |
| Product family | 990 |
| Subcategory | Diaphragm seal |
Measuring range
| Pressure ranges | 0…221 bar · 0…268 bar · 0…292 bar · 0…3205 psi · 0…3887 psi · 0…4235 psi |
Process conditions
| Process connection | G ½G ¼½ NPT¼ NPTG1/2G1/41/2 NPT1/4 NPT |
| Process temperature | −20…+400 °C |
Materials
| Case material | Stainless steel 1.4435 (316L), Stainless steel 1.4466 |
| Wetted parts material | Stainless steel 1.4466 |
Certifications and approvals
| Certifications | EN 10204 |
Additional details
| Datasheet languages | EN |
Tables from datasheet
| Model 990.49 | Standard | Option |
|---|---|---|
| Pressure/temperature operating limit | ■ 221 bar [3,205 psi] / 250 °C [482 °F] ■ 268 bar [3,887 psi] / 160 °C [320 °F] ■ 292 bar [4,235 psi] / 80 °C [176 °F] | on request |
| Material | see material design page 3 | Material test according to Snamprogetti ® specification CR.UR.510 rev.3 from RTM BREDA S.r.l. |
| Level of cleanliness of wetted parts | Oil and grease free per ASTM G93-03 level FWIKA 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 |
| Connection to the measuring instrument | Axial adapter | Axial adapter with G½, G¼, ½NPTor ¼NPT(female) |
| Type of mounting | Direct mounting | ■ Capillary ¹⁾ ■ Cooling element |
| Threaded flange | - | Stainless steel 1.4435 (316L) |
| Vacuum service (see IN 00.25) | Basic service | ■ Premium service ■ Advanced service |
| Instrument mounting bracket (only for capillary option) | - | ■ Form H per DIN 16281, 100 mm, aluminium, black ■ Form H per DIN 16281, 100 mm, stainless steel ■ Bracket for pipe mounting, for pipe Ø20 ... 80 mm, steel (see data sheet AC 09.07) |
| 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 |
Industry
Oil & Gas
Thick-walled or insulated pipelines and vessels
Industry
Chemistry / Pharma
Fertiliser industry
Couldn't find the answer in the documentation? An engineer will reply within a business day.
Ask an engineer →