You are here:

McCannalok Metal Seated

High Performance Butterfly Valve


Size Range

NPS 2½ to 30 / DN 65 to 750

Temperature Range

Capabilities up to 900 °F (482°C)
3rd party-validated

Maximum Allowable Operating Pressure

ASME Class 150, 300, 600

Shutoff Rating

Class IV

Body Style

Wafer, Lug, Double Flanged

Flange Drilling

ASME B16.5, EN 1092

Body Materials

Stainless Steel, Carbon Steel

Stem Materials

17-4 PH Stainless Steel: ASTM A564 Type 630 H1150D
Stainless Steel: ASTM A479 316 Strain Hardened Level 1

Seat Materials

Inconel® 718

Disc Materials

Nitrided Stainless Steel, ASTM A351 CF8M

Fugitive Emissions Standard

ISO 15848-1, API 641

Features & Benefits

The Bray/McCannalok Metal Seated high performance butterfly valve has been extensively performance tested in our state-of-the-art technology center and test laboratory. The Inconel® 718 metal seat has been contoured to provide control, strength and flexibility in high temperature applications. The Technology Group’s design validation procedure includes cycle, torque and leakage testing to ensure long service life.


  • Body Style: Wafer, Lug and Double Flanged
  • ASME Class 150 and 300: 2 -1/2” – 30” (65mm – 750mm)
  • ASME Class 600: 3” – 14” (80mm – 350mm)
  • Capabilities up to 900 °F (482 °C)
  • Wear-resistant Inconel® 718 metal seat provides industry leading low torque
  • 3rd party validated high temperature tested
  • High strength, anti-blowout one piece stem
  • Nitrided disc for abrasion resistance
  • Contoured disc to maximize flow
  • Full face retaining ring protects seat in abrasive applications
  • Easily accessible and adjustable stem packing
  • Class IV bi-directional leakage rates through full pressure range tested in accordance to IEC 60534-4 and ANSI/FCI 70-2-2013
  • Alternative flange drilling available