Purple Valves
PRPLZ253

Bellow Sealed Globe Valve

A bellows-sealed globe valve giving zero-leakage stem sealing for hazardous and high-purity throttling duties.

Size1/2" to 24"PressureANSI Class 150 to 1500BodyBellows Sealed Bonnet
Overview

The Bellows Sealed Globe Valve answers applications where even minute stem leakage is unacceptable, such as toxic, flammable, high-purity or high-temperature media. A welded metal bellows forms a hermetic barrier around the stem, backed by a conventional gland as a secondary seal, while the disc-and-seat throttling element delivers the precise flow regulation expected of a globe valve along with its characteristic higher pressure drop. Bodies are offered in WCB, A105N, LCC, LF2 and stainless CF8M/316/316L across Class 150 to 1500 with flanged, butt weld and socket weld ends. Designed to BS 1873 and API 623 and tested to API 598, the bellows seal greatly reduces fugitive emissions and maintenance in critical service.

Technical Detail

Specifications

Size Range
1/2" to 24"
Pressure Rating
ANSI Class 150 to 1500
Temperature Range
-46°C to 232°C (-50°F to 450°F)
End Connections
Flanged RF, RTJ, Butt Weld, Socket Weld
Body Material
WCB / A105N / LCC / LF2 / CF8M / 316 / 316L
Ball / Disc / Wedge Material
TRIM 1,5,8,12,16 & Special Materials
Seat Material
Stellite / 13Cr / PTFE / metal seated (trim dependent)
Stem Material
410 / 13Cr / F6a / 316 stainless (trim dependent)
Body Style
Bellows Sealed Bonnet
Operation
Handwheel, Gear, Electric, Pneumatic
Applications
Oil & gas, petrochemical, power generation, water treatment and general process throttling and flow regulation
Design Standard
BS 1873 / API 623 / ASME B16.34
Testing Standard
API 598
Face to Face Standard
ASME B16.10
At a Glance

Key Features

  • Precise throttling and flow regulation via disc-onto-seat closure
  • Forged or cast body construction matched to service pressure and temperature
  • Wide range of body and trim materials for corrosive and high-temperature media
  • Renewable seat and disc for long, maintainable service life
  • Multiple end connection options for flexible installation

Options

  • NACE MR0175 compliant construction available
  • Anti-static and fire-safe designs on request
  • Actuation: gear, electric or pneumatic
  • Special alloys and trims to order

Standards & Certifications

  • Designed to BS 1873 / API 623 / ASME B16.34
  • Tested to API 598
  • Face-to-face per ASME B16.10
  • NACE MR0175 available
Contact

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