WIKA · Pressure measurement · Family 981
In-line diaphragm seal
In-line diaphragm seal for flange connection, suitable for direct installation between two flanges in chemical and petrochemical industries.
Range
0…40 bar
Price
On request
Depends on configuration
Special features
- Completely round, no corners and edges
- For direct installation between two flanges
- Wide choice of special materials
- Heatable version available
Identification
| Model | 981.27 |
| Product family | 981 |
| Subcategory | Flange-type diaphragm seal |
Measuring range
| Pressure ranges | 0…0.6 bar · 0…40 bar |
Process conditions
| Process connection | EN 1092-1 DN 25, 40, 50, 80, 100ASME B 16.5 1", 2", 3", 4"PN 16/40Class 150/300EN 1092-1ASME B 16.5 |
Materials
| Wetted parts material | 1.4435, 1.4541, Monel, Hastelloy B3, Hastelloy C4, Hastelloy C22, Hastelloy C276, tantalum, Stainless steel (AISI 316L), 1.4571, Stainless steel 1.4571 |
Certifications and approvals
| Explosion protection | Flame arrester approved for zone 0 |
Additional details
| Datasheet languages | EN |
Tables from datasheet
| DN inmm | PN | D | b | d 2 | k | f | d 4 | Number of bores | L | Mb 1) |
|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 40 | 115 | 18 | 14 | 85 | 2 | 68 | 4 | 114 | 28.5 |
| 40 | 40 | 150 | 18 | 18 | 110 | 3 | 88 | 4 | 146 | 43 |
| 50 | 40 | 165 | 20 | 18 | 125 | 3 | 102 | 4 | 156 | 54.5 |
| 80 | 40 | 200 | 24 | 18 | 160 | 3 | 138 | 8 | 166 | 82.5 |
| 100 | 16 | 220 | 20 | 18 | 180 | 3 | 158 | 8 | 166 | 107 |
| 40 | 235 | 24 | 22 | 190 | 3 | 162 | 8 | 166 | 107 |
| DN | Class | D | b | d 2 | k | f | d 4 | Number of bores | L | Mb 1) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 " | 150 | 110 | 14.5 | 16 | 79.5 | 2 | 51 | 4 | 114 | 26.6 |
| 300 | 125 | 17.5 | 20 | 89 | 2 | 51 | 4 | 114 | 26.6 | |
| 2 " | 150 | 150 | 19.5 | 20 | 120.5 | 2 | 92 | 4 | 156 | 52.5 |
| 300 | 165 | 22.5 | 20 | 127 | 2 | 92 | 8 | 156 | 52.5 | |
| 3 " | 150 | 190 | 24 | 20 | 152.5 | 2 | 127 | 4 | 166 | 78 |
| 300 | 210 | 29 | 22 | 168.5 | 2 | 127 | 8 | 166 | 78 | |
| 4 " | 150 | 230 | 24 | 20 | 190.5 | 2 | 158 | 8 | 166 | 102.3 |
| 300 | 255 | 32 | 22 | 200 | 2 | 158 | 8 | 166 | 102.3 |
| DN inmm | PN | D1 | b1 | d1 | k1 | f1 | d4 | L1 | Mb |
|---|---|---|---|---|---|---|---|---|---|
| 100 | 25/40 | 235 [9.26] | 24 [0.95] | 22 [0.87] | 190 [7.48] | 2 [0.08] | 162 [6.38] | 166 [6.53] | 107 [4.21] |
| DN inmm | PN | D2 | b2 | d2 | k2 | f2 | d5 | d6 | L2 |
|---|---|---|---|---|---|---|---|---|---|
| 25 | 10/40 | 115 [4.53] | 18 [0.71] | 14 [0.55] | 85 [3.35] | 2 [0.08] | 68 [2.68] | 27.8 [1.10] | 330 [12.99] |
View all (5)
| DN inmm | Number of bores |
|---|---|
| 25 | 4 |
| 100 | 8 |
Industry
Oil & Gas
For direct, permanent installation in pipelines · Petrochemical industry
Industry
Chemistry / Pharma
Chemical process industry
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1 standard articles of family 981
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