Model 990.12

Flanged Process Connection, Diaphragm Seals

Threaded Design

Selected documents
Sales contact

WIKA USA

Tel.:
1-888-945-2872
Fax:
1-770-338-5118
info@wika.com

Applications

  • Suitable for corrosive, contaminated, highly viscous or hot pressure media
  • Chemical process industry
  • Petrochemical industry
  • High process pressures

Special Features

  • Flanged process connection per EN/ASME (NPS) ½", ¾", 1" or DN 15, 20, 25
  • Design with internal diaphragm and diaphragm bed, upper and lower housing threaded
  • Wide variety of special materials

Description

Pressure rating
class 150 ... 1500

Suitable pressure ranges
0 ... 15 psi to 0 ... 3,625 psi

Upper housing (instrument connection)
Material stainless steel 316 L, ½ NPT

Diaphragm
Material stainless steel 316 L, welded with upper housing
Effective diameter of diaphragm Mb = 2.1"

Sealing ring
FPM (Viton®) max. 392 °F

Lower housing (process connection)
Material stainless steel 316 L
Flanges DN 15, 20, 25 following EN 1092-1, sealing face form B1 or NPS ½", ¾", 1" per ASME B 16.5, RF 125 ... 250 AA

Fastening parts
Retainer flange, hexagonal bolts and nuts:
galvanised steel max. 392 °F

Optional extras

Upper housing (instrument connection)

  • Stainless steel 316TI, 321, titanium
  • Capillary extension (welded with upper housing)
  • Cooling tower for directly mounted gauge when fluid temperature > 212 °F

Diaphragm

  • Stainless steel 316TI, 316, 904L, 321
  • Hastelloy B3, C276, Monel 400, Nickel, lnconel 600,
  • lncoloy 825, tantalum, titanium, zirconium (upper housing titanium)
  • Silver foil max. 300 °F
  • PTFE foil max. 500 °F ≤ 1500 psi
  • PFA coating max. 500 °F
  • ECTFE (Halar®) coating max. 300 °F
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