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990.22 1
990.22
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WIKA · Pressure measurement · Family 990

Diaphragm seal with sterile connection

With clamp connection (TRI-CLAMP ® )
Range
0…40 bar
3-AEHEDGCRNFDA
Price
On request
Depends on configuration
Request a quote
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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'.

TRI-CLAMP ® is a trademark of the company Alfa Laval AB SE

For further approvals see page 7

Special features

  • Quick cleaning, without residue
  • Clamp connection easy to open for cleaning and seal replacement
  • Suitable for SIP and CIP
  • EHEDG-certified and 3-A marked
  • Compliant per ASME BPE
Identification
Model990.22
Product family990
SubcategoryDiaphragm seal with clamp connection (TRI-CLAMP)
Measuring range
Pressure ranges0…0.6 bar · 0…40 bar · 0…8.7 psi · 0…580 psi
Process conditions
Process connection
Clamp connection per DIN 32676Clamp connection per BS4825 Part 3Clamp connection per ISO 2852Pipe standard per DIN 11866 row B and ISO 1127 row 1Pipe standard per DIN 11866 row C or ASME BPEPipe standard per DIN 11866 row A and DIN 11850 row 2
Process temperature≤ +400 °C
Materials
Case materialStainless steel 1.4435 (316L), Hastelloy C22 (2.4602), Hastelloy C276 (2.4819)
Wetted parts materialStainless steel 1.4435 (316L), Hastelloy C22 (2.4602), Hastelloy C276 (2.4819)
Certifications and approvals
Certifications
3-AEHEDGCRNFDA
Additional details
Datasheet languagesEN
Tables from datasheet
Models 990.22, 990.52 and 990.53StandardOption
Pressure range0 ... 0.6 bar to 0 ... 40 bar [0 ... 8.7 psi to 0 ... 580 psi] ¹⁾ or all other equivalent vacuum or combined pressure and vacuum ranges
Level of cleanliness of wetted partsOil 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 partsInternational■ EU ■ CH ■ USA
Surface roughness of wetted partsRa ≤ 0.76 μm per ASME BPE SF3 (except for weld seam)Ra ≤ 0.38 μm per ASME BPE SF4, only with electropolished surface (except for weld seam)
Connection to the measuring instrumentAxial adapterAxial adapter with G1/2, G1/4, 1/2 NPT or 1/4 NPT (female)
Type of mountingDirect mounting■ Capillary ■ Cooling element
Vacuum service (see IN 00.25)Basic service■ Premium service ■ Advanced service
Marking of the diaphragm seal-Per valid 3-A standard
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)
Upper body of diaphragm sealWetted partsMaximum permissible process temperature ¹⁾ in °C [°F]
Stainless steel 1.4435 (316L)Stainless steel 1.4435 (316L)400 [752]
Hastelloy C22 (2.4602)Hastelloy C22 (2.4602)
Hastelloy C276 (2.4819)Hastelloy C276 (2.4819)
DNPN ¹⁾Dimensions in mm[in]
For pipe outer ∅xwall thicknessPipe inner∅DMb
26.94026.9 x 1.6 [1.059 x 0.063]23.7 [0.933]50.5 [1.988]22 [0.866]
33.74033.7 x 2 [1.327 x 0.079]29.7 [1.169]50.5 [1.988]25 [0.984]
42.44042.4 x 2 [1.669 x 0.079]38.4 [1.512]64 [2.52]32 [1.26]
48.34048.3 x 2 [1.902 x 0.079]44.3 [1.744]64 [2.52]40 [1.575]
60.34060.3 x 2 [2.374 x 0.079]56.3 [2.217]77.5 [3.051]52 [2.047]
76.12576.1 x 2 [2.996 x 0.079]72.1 [2.839]91 [3.583]72 [2.835]
DNPN ¹⁾Dimensions in mm[in]
For pipe outer ∅xwall thicknessPipe inner∅DMb
1 "4025.4 x 1.65 [1 x 0.065]22.1 [0.87]50.5 [1.988]22 [0.866]
1½ "4038.1 x 1.65 [1.5 x 0.065]34.8 [1.37]50.5 [1.988]32 [1.26]
2 "4050.8 x 1.65 [2 x 0.065]47.5 [1.87]64 [2.52]40 [1.575]
2½ "4063.5 x 1.65 [2.5 x 0.065]60.2 [2.37]77.5 [3.051]52 [2.047]
3 "2576.2 x 1.65 [3 x 0.065]72.9 [2.87]91 [3.583]72 [2.835]
View all (9)
DNPN ¹⁾Dimensions in mm[in]
For pipe outer ∅xwall thicknessPipe inner∅DMb
25,44025.4 x 1.6 [1 x 0.063]22.2 [0.874]50.5 [1.988]22 [0.866]
38,14038.1 x 1.6 [1.5 x 0.063]34.9 [1.374]50.5 [1.988]32 [1.26]
50,84050.8 x 1.6 [2 x 0.063]47.6 [1.874]64 [2.52]40 [1.575]
63,54063.5 x 1.6 [2.5 x 0.063]60.3 [2.374]77.5 [3.051]52 [2.047]
76,22576.2 x 1.6 [3 x 0.063]73 [2.874]91 [3.583]72 [2.835]
DNPN ¹⁾Dimensions in mm[in]
For pipe outer ∅xwall thicknessPipe inner∅DMb
254029 x 1.5 [x 0.059]26 [1.024]50.5 [1.988]25 [0.984]
324035 x 1.5 [x 0.059]32 [1.26]50.5 [1.988]29 [1.142]
404041 x 1.5 [x 0.059]38 [1.496]50.5 [1.988]32 [1.26]
504053 x 1.5 [x 0.059]50 [1.969]64 [2.52]40 [1.575]
652570 x 2 [x 0.079]66 [2.598]91 [3.583]60 [2.362]
802585 x 2 [x 0.079]81 [3.189]106 [4.173]72 [2.835]
10025104 x 2 [x 0.079]100 [3.937]119 [4.685]90 [3.543]
DNPN ¹⁾Dimensions in mm[in]
For pipe outer ∅xwall thicknessPipe inner∅DMb
254025 x 1.2 [0.984 x 0.047]22.6 [0.89]50.5 [1.988]22 [0.866]
33.74033.7 x 1.2 [1.327 x 0.047]31.3 [1.232]50.5 [1.988]25 [0.984]
384038 x 1.2 [1.496 x 0.047]35.6 [1.402]50.5 [1.988]32 [1.26]
404040 x 1.2 [1.575 x 0.047]37.6 [1.48]64 [2.52]32 [1.26]
514051 x 1.2 [2.008 x 0.047]48.6 [1.913]64 [2.52]40 [1.575]
63.54063.5 x 1.6 [2.5 x 0.063]60.3 [2.374]77.5 [3.051]52 [2.047]
702570 x 1.6 [2.756 x 0.063]66.8 [2.63]91 [3.583]60 [2.362]
76.12576.1 x 1.6 [2.996 x 0.063]72.9 [2.87]91 [3.583]72 [2.835]
88.92588.9 x 2 [3.5 x 0.079]84.9 [3.343]106 [4.173]72 [2.835]
101.625101.6 x 2 [4 x 0.079]97.6 [3.843]119 [4.685]90 [3.543]
LogoDescriptionRegion
®3-A Hygienic Design This instrument is 3-A marked, based on a third party verification for conformance to the 3-A standard.USA
FEBRUARY 2026 TYPE EL CLASS IEHEDG Hygienic DesignEuropean Union
-CRN Safety (e.g. electr. safety, overpressure, ...)Canada
Description
Certificates■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, material proof, indica - tion accuracy for diaphragm seal systems) ■ 3.1 inspection certificate per EN 10204 (e.g. material proof for wetted metallic parts, indication accuracy for diaphragm seal systems) ■ FDA conformity of the system fill fluid ■ 3-A conformity of the diaphragm seal, based on a third party verification ■ EHEDG conformity ■ Manufacturer&#x27;s declaration for food contact materials regarding regulation (EC) No. 1935/2004 ■ Others on request