# Diaphragm seal with flange connection — 990.16

> With internal diaphragm, threaded design, high-pressure version

- Catalog code: 990_16
- Model: 990.16
- Category: Pressure measurement › Diaphragm seals
- Product page: https://avigan.com.ua/wika/en/products/990_16
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

The 990.16 diaphragm seal is particularly suitable for covering high pressure ranges (up to PN 400 /Class 2,500). Internal diaphragm, threaded design.

## Applications

- Aggressive, contaminated or hot media
- Chemical and petrochemical industries
- Oil and gas industry
- High-pressure applications

## Special features

- High pressures up to PN 400 / class 2.500
- Flange with internal welded diaphragm
- Small process connections
- Flushing connections optionally available

## Specifications

| Parameter | Value |
|---|---|
| model | 990.16 |
| product family | 990 |
| short description | Diaphragm seal with flange connection, high-pressure version, with internal diaphragm and threaded design for aggressive, contaminated or hot media in chemical, petrochemical, oil and gas industries. |
| subcategory | Diaphragm seal |
| certifications | EAC; CRN; MTSCHS |
| languages in datasheet | en |
| pressure ranges | 0 … 400 bar; 0 … 2500 psi |
| process connections | DN 15; DN 20; DN 25; DN 40; 1"; DIN EN 1092-1 DN 15 PN 400; DIN EN 1092-1 DN 20 PN 400; DIN EN 1092-1 DN 25 PN 400; DIN EN 1092-1 DN 40 PN 400; ASME B16.5 ½" class 2500; ASME B16.5 ¾" class 2500; ASME B16.5 1" class 2500; ASME B16.5 1 ½" class 2500; ½"; ¾"; 1 ½"; 1/2"; 3/4"; 1 1/2" |
| case material | Stainless steel 1.4404 (316L); Stainless steel 1.4435 (316L); Stainless steel 1.4539 (904L); Stainless steel 1.4541 (321); Stainless steel 1.4571 (316Ti); Duplex 2205 (1.4462); Superduplex 2507 (1.4410); Hastelloy C22 (2.4602); Hastelloy C276 (2.4819); Inconel 600 (2.4816); Inconel 625 (2.4856); Monel 400 (2.4360); Nickel 200 (2.4060, 2.4066); Titan grade 2 (3.7035); Titan grade 7 (3.7235); Incoloy 825 (2.4858); Titan grade 11 (3.7225); Tantalum; Incoloy 825 (2.4558); ECTFE coating; PFA (perfluoroalkoxy) coating; Gold plating; Wikaramic® coating |
| wetted parts material | Stainless steel 1.4404 (316L); Stainless steel 1.4539 (904L); Stainless steel 1.4541 (321); Stainless steel 1.4571 (316Ti); ECTFE coating; Hastelloy C22 (2.4602); Hastelloy C276 (2.4819); Inconel 600 (2.4816); Inconel 625 (2.4856); Monel 400 (2.4360); Nickel 200 (2.4060, 2.4066); Titan grade 2 (3.7035); Titan grade 11 (3.7225); Tantalum; Incoloy 825 (2.4858); PFA (perfluoroalkoxy) coating; Gold plating; Duplex 2205 (1.4462); Superduplex 2507 (1.4410); PFA (perfluoroalkoxy) coating, FDA; PFA (perfluoroalkoxy) coating, antistatic; Gold plating ® coating; Wikaramic; Wikaramic ® coating; Wikaramic® coating; Incoloy 825 (2.4558); Stainless steel 1.4435 (316L); Titan grade 7 (3.7235) |
| sealing material | FPM; PTFE; Metal C snap ring |
| process temp | -20 … 400 °C |

## Datasheet tables

| Model 990.16 | Standard | Option |
|---|---|---|
| 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/m²) |
| Origin of wetted parts | International | EU, CH, USA |
| Sealing | ■ FPM, max. 200 °C [392 °F] ■ PTFE, max. 260 °C [500 °F] | Metal C snap ring, max. 400 °C [752 °F] |
| Flushing connection | - | ■ Single flushing connection (G ¼, G⅛, ¼NPT, ⅛NPT) ■ Dual flushing connection (G ¼, G⅛, ¼NPT, ⅛NPT) ■ Plug screws |
| Connection to the measuring instrument | Axial adapter | Axial adapter with G½, G¼, ½NPTor ¼NPT(female) |
| Type of mounting | Direct mounting | ■ Capillary ■ Cooling element |
| Retainer parts | Stainless steel | - |
| Design per NACE | - | ■ MR0175 ■ MR0103 |
| 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) |

| 1 | 2 | 3 | 4 |
|---|---|---|---|
| Standard | Nominal width | Sealing face |  |
|  |  | Standard | Option |
| Following DIN EN 1092-1 | DN 15 | Form B1 | Form B2 |
| DN 20 |  |  |  |
| DN 25 |  |  |  |
| DN 40 |  |  |  |
| Following ASME B16.5 | ½" | RF 125 ... 250 AA | RFSF Flat face Ring groove form RJF |
| ¾" |  |  |  |
| 1" |  |  |  |
| 1 ½" |  |  |  |

| Upper body of diaphragm seal | Lower body of diaphragm seal and diaphragm (wetted) | Maximum permissible process temperature 1) in °C [°F] |
|---|---|---|
| Stainless steel 1.4404 (316L) | Stainless steel 1.4404 (316L) | 400 [752] |
| Stainless steel 1.4539 (904L) |  |  |
| Stainless steel 1.4541 (321) |  |  |
| Stainless steel 1.4571 (316Ti) |  |  |
| ECTFE coating | 150 [302] |  |
| PFA (perfluoroalkoxy) coating, FDA | 260 [500] |  |
| PFA (perfluoroalkoxy) coating, antistatic |  |  |
| Gold plating | 400 [752] |  |
| Wikaramic ® coating |  |  |
| Hastelloy C22 (2.4602) | 260 [500] |  |
| Hastelloy C276 (2.4819) | 400 [752] |  |
| Inconel 600 (2.4816) |  |  |
| Inconel 625 (2.4856) |  |  |
| Incoloy 825 (2.4858) |  |  |
| Monel 400 (2.4360) |  |  |
| Nickel 200 (2.4060, 2.4066) | 260 [500] |  |
| Titan grade 2 (3.7035) | 150 [302] |  |
| Titan grade 11 (3.7225) |  |  |
| Tantalum | 300 [572] |  |
| Stainless steel 1.4435 (316L) | Stainless steel 1.4435 (316L) | 400 [752] |
| Stainless steel 1.4539 (904L) | Stainless steel 1.4539 (904L) |  |
| Stainless steel 1.4541 (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] |
| Superduplex 2507 (1.4410) | Superduplex 2507 (1.4410) |  |
| Hastelloy C22 (2.4602) | Hastelloy C22 (2.4602) | 400 [752] |
| Hastelloy C276 (2.4819) | Hastelloy C276 (2.4819) |  |
| Inconel 600 (2.4816) | Inconel 600 (2.4816) |  |
| Inconel 625 (2.4856) | Inconel 625 (2.4856) |  |
| Incoloy 825 (2.4558) | Incoloy 825 (2.4858) |  |
| Monel 400 (2.4360) | Monel 400 (2.4360) |  |
| Nickel 200 (2.4060, 2.4066) | Nickel 200 (2.4060, 2.4066) |  |
| Titan grade 2 (3.7035) | Titan grade 2 (3.7035) |  |
| Titan grade 7 (3.7235) | Titan grade 11 (3.7225) |  |

| 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 |

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|
| DN | PN | Dimensions in mm[in] | G 1 |  |  |  |  |  |
|  |  | Mb | D | b | d 4 | f | k |  |
| 15 | 400 | 52 [2.047] | 145 [5.709] | 30 [1.181] | 45 [1.772] | 2 [0.079] | 100 [3.937] | M20 |
| 25 | 400 | 52 [2.047] | 180 [7.087] | 38 [1.497] | 68 [2.677] | 2 [0.079] | 130 [5.118] | M24 |

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|
| DN | Class | Dimensions in mm[in] | G 1 |  |  |  |  |  |
|  |  | Mb | D | b | d 4 | f | k |  |
| ½" | 2500 | 52 [2.047] | 135 [5.315] | 37.2 [1.465] | 34.9 [1.374] | 7 [0.276] | 88.9 [3.5] | ¾"-10 UNC |
| ¾" | 2500 | 52 [2.047] | 140 [5.512] | 38.8 [1.528] | 42.9 [1.689] | 7 [0.276] | 95.5 [3.76] | ¾"-10 UNC |
| 1" | 2500 | 52 [2.047] | 160 [6.299] | 42 [1.654] | 50.8 [2] | 7 [0.276] | 108 [4.252] | 7/8"-9 UNC |

| 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 |

## Documents

- [ds_ds9908_en_co_05057c](https://avigan.com.ua/wika/docs/wika/ds_ds9908_en_co.pdf) — PDF, 446 KB, en
- [ds_in0006_en_co_af8b01](https://avigan.com.ua/wika/docs/wika/ds_in0006_en_co.pdf) — PDF, 1239 KB, en