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American Petroleum Institute , 04/01/2021
Publisher: API
File Format: PDF
$58.00$117.00
API Std 609 Ninth Edition PDF
This standard covers design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for gray iron, ductile iron, bronze, steel, nickel-based alloy, or special alloy butterfly valves.
The following two categories of butterfly valves are included:
Category A—Manufacturer's rated cold working pressure (CWP) butterfly valves, usually with a concentric disc and seat configuration. Sizes covered are NPS 2 to NPS 60 for valves having ASME Class 125 or Class 150 flange bolting patterns.
Category B—ASME class and pressure-temperature-rated butterfly valves that have an offset seat and either an eccentric or a concentric disc configuration. Sizes covered are listed below:
$58.00 $117.00
$64.00 $129.00
$70.00 $140.00
$72.00 $144.00
$44.00 $89.00
$91.00 $182.00
$56.00 $113.00
$50.00 $101.00