Diaphragm Seals
Diaphragm - Type Diaphragm Seal
Type L990.10 - Standard Welded Diaphragm Seal
WIKA Datasheet L990.10
Applications
Process industry diaphragm seal to combine bourdon tube pressure gauges. Intended for corrosive, contaminated, hot or viscous pressure media.
Features
Multi-purpose diaphragm seal
Threaded process connection
Diaphragm welded to upper housing
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Design |
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The diaphragm is welded to the upper housing which allows |
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Standard Welded Diaphragm Seal Model L990.10 |
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the replacement of the lower housing without jeopardizing |
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the integrity of the system fill fluid and installed instrument. |
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The upper and lower housing are bolted together and sealed |
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by use of an O-ring. Process wetted components can be |
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manufactured with solid metallic and nonmetallic materials. |
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Pressure Rating, |
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Maximum1: |
3,675 psi |
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Suitable Pressure Span, |
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Minimum2: |
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Gauge (Range3): |
2½”, > 15 psi |
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4” or 4½”, > 15 psi |
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Pressure Transmitters |
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(TRONIC)4: |
> 15 psi |
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Operating Temperature5: |
-130°F to 752°F (-90°C to 400°C) |
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WIKA Datasheet L990.10 · 05/2008 |
Page 1 of 4 |
L990.10 Smart Codes for Custom Order Configurations
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Field No. |
Code |
Feature |
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Process Connection |
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GN2 |
1/4 NPT Female |
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GN4 |
1/2 NPT Female |
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GN5 |
3/4 NPT Female |
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GN6 |
1 NPT Female |
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GNB |
1/4 NPT Male |
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GND |
1/2 NPT Male |
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GNE |
3/4 NPT Male |
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GNF |
1.0 NPT Male |
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1 |
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??? |
Other - Please Specify |
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Nominal Pressure Rating |
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XA |
200 psi MWP (Maximum 300 °F) |
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XB |
1500 psi MWP (Standard 4 bolts) |
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XT |
3675 psi |
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2 |
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?? |
Other - Please Specify |
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Upper Housing Material |
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AP |
Carbon Steel 1018 Nickel Plated |
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A2 |
Stainless Steel 316L (1.4435) |
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A1 |
Stainless Steel 316TI (1.4571) |
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AE |
Titanium Grade 2 (3.7035) |
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3 |
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?? |
Other - Please Specify |
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Diaphragm Material |
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A2 |
Stainless Steel 316L (1.4435) |
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A5 |
Hastelloy B2 (2.4617) |
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A7 |
Hastelloy C276 (2.4819) |
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A8 |
Monel 400 (2.4360) |
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A9 |
Inconel 600 (2.4816 ) |
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AA |
Incoloy 825 (2.4858) |
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AB |
Tantalum |
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AC |
Nickel 200 (2.4066) |
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AE |
Titanium Grade 2 (3.7035) Upper Titanium required |
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C2 |
Carpenter 20 |
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AG |
Stainless Steel 316TI (1.4571) with PTFE-foil |
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BB |
Stainless Steel 316L with PFA-coating |
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BD |
Stainless Steel 316TI (1.4571) with Gold Lining 25 µm |
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4 |
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?? |
Other - Please Specify |
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Lower Housing Material |
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AP |
Carbon Steel 1018 Nickel Plating |
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A1 |
Stainless Steel 316TI (1.4571) |
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A2 |
Stainless Steel 316L (1.4435) |
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A5 |
Hastelloy B2 (2.4617) |
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A7 |
Hastelloy C276 (2.4819) |
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A8 |
Monel 400 (2.4360) |
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A9 |
Inconel 600 (2.4816) |
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AA |
Incoloy 825 (2.4858) |
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AE |
Titanium Grade 2 (3.7035) |
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Page 2 of 4 |
WIKA Datasheet L990.10 · 05/2008 |
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