D438 Diaphragm seal with compact process flange Main Features Low pressure version Pressure range from 160 mbar to 100 bar Temperature -60 °C … 400 °C Class 150 to 600 NPS 1/2" to 2" DN15 to DN50 Applications Oil & Gas / Chemical Water / Waste water Energy Process technic Technical Data The diaphragm seals are used to protect the measuring instrument from high temperature, aggressive, crystalizing or corrosive media. The design of the process flange allows direct mounting on standardized flange connections of pipes or tanks. The D438 should be used especially for the measurement of low pressure on process flanges with small diameters and high pressure ratings. These products can also be used in processes with fluid temperatures > 200 °C. For applications with lower temperatures and pressure ratings, it is recommended to check, if the series D425 and D435 can be used. Pressure ranges 0 ... 160 mbar to 0 ... 100 bar Temperature -60 °C ... +400 °C Filling liquids LRS1: -15 °C ... +150 °C LRS9: -40 °C ... +400 °C high temperature oil Other liquids on request Mounting Direct or remote from 1.5 to 12 meters Flange types Hot rolled or forged 1.4404 stainless steel according EN 10088-3, compliant with NACE MR 0103 or MR 0175. ASME B16.5 / EN1759-1: class 150 to 600, NPS 1/2" to 2" (DN15 to DN50) Available flange faces see table on page 2. Other flange types on request. Diaphragm Stainless steel 1.4435 (AISI 316L) Active diameter 95 mm Option: Hastelloy Maximum pressure According to the class of the flange and its standardized pressure temperature relation For pressure ranges above 0...10 bar it is recommended to use the series D418. The filling fluid of the measuring system has to be choosen compatible to the application. N° D438 Stainless steel 1.4404 Screws / nuts Capillary (option) Upper part Process flange Diaphragm Gasket Screws www.baumer.com 1) Stainless steel 1.4404 1) Stainless steel 1.4435 1) Graphite Stainless steel A4-80 ASTM A 193 B7M / A 194 2HM Stainless steel 2015-10-21 Design and specifications subject to change without notice Materials Others materials see ordering details on page 3. Data sheet A42.22 Page 1 / 3 D438 Diaphragm seal with compact process flange Dimensions (mm) 65 to 95 37 8 screws M10 N x ØL K D Ø150 Flange dimensions (mm) ANSI B16-5 / EN 1759-1 1/2" (DN15) 150 89 60.3 4 M14 1/2 UNC 4 7.8 300 95 66.7 4 M14 1/2 UNC 4 8.2 600 95 66.7 4 M14 1/2 UNC 4 8.2 150 99 69.8 4 M14 1/2 UNC 4 8 300 117 82.6 4 M16 5/8 UNC 4 9.4 600 117 82.6 4 M16 5/8 UNC 4 9.4 150 108 79.4 4 M14 1/2 UNC 4 8.5 300 124 88.9 4 M16 5/8 UNC 4 9 1" (DN25) 2" (DN50) N ASME 1) ISO 1) N 600 124 88.9 4 M16 5/8 UNC 4 9 150 150 120.6 4 M16 5/8 UNC 4 9.5 300 165 127 8 M16 5/8 UNC 4 10.2 600 165 127 8 M16 5/8 UNC 4 10.2 see codification on page 3. Design and specifications subject to change without notice (1) ØK Weight (kg) Class 3/4" (DN20) ØD ØL DN Ordering codes for flange faces Face Type Raised face Drawing ANSI B16-5 Raised face (2) (1) Raised face (7) (2) Codes G R Ra = 3.2...6.3 µm Ring joint face Ring joint face Ra = 0.4...1.6 µm (1) Type B (1.6) (1) Type B (6.4) (2) Codes G R Ra = 3.2...6.3 µm Q Type J Q Ra = 0.4...1.6 µm Class 150 and 300 Class 600 2015-10-21 (2) EN 1759-1 www.baumer.com Data sheet A42.22 Page 2 / 3 D438 Diaphragm seal with compact process flange Ordering details D438 D438 – . . . . . Model Flange diaphragm seal D4 3 8 Upper part material Vent valve – 0 1 9 Hot rolled NACE compliant 1.4404 L st. steel EN10083-3 Forged NACE compliant 1.4404 st.steel M Type of capillary Direct (no capillary) St. steel capillary with st. steel protection St. steel capillary with st. steel protection and white plastic Atex sheath St. steel capillary with reinforced st. steel protection Outlet position Axial outlet Capillary length Without capillary Length 1.5 meter Length 3 meters Length 4.5 meters Length 6 meters Length 9 meters Length 12 meters Instrument connection G1/2 female 1/2NPT female Diaphragm material Stainless steel 316L (1.4435) Hastelloy C276 (2.4819) 0 1 9 1 A D F . 0 1 Without SW 1/4 OD 10 valve SW 1/4 OD 3/8 valve Drain valve (bottom hole) Without SW 1/4 OD 10 valve SW 1/4 OD 3/8 valve Heat tracing circuit Without With Bolts 0 M A . 0 0 E 3 F 6 9 D L . M ISO (metric)1) ASME (UNC) Process flange coating Without Flange material Hot rolled NACE compliant 1.4404 EN 10083-3 Forged NACE compliant 1.4404 L N 2 6 . DN/NPS ANSI B16-5 / EN 1759-1 NPS 1/2" (DN15) NPS 3/4" (DN20) NPS 1" (DN25) NPS 2" (DN50) Flange face type See table page 2 (codes) Flange face finish Standard finish 2 6 1 2 3 . 2 3 4 7 x 0 Except flange ANSI B16-5 2015-10-21 1) 0 7 Design and specifications subject to change without notice Diaphragm coating No coating Gold coating 15 µm Flange standard ANSI B16-5 EN 1759-1 PN/Class ANSI B16-5 / EN 1759-1 Class 150 Class 300 Class 600 www.baumer.com Data sheet A42.22 Page 3 / 3