Direct answer · August 2026
How do you select a WCB gate valve to API 600?
Select API 600 WCB gate valve by size (DN50–DN600+), pressure class (150 or 300 minimum for rating), trim (SS410 standard, SS316 or Stellite for corrosive/severe service), end connection (RF flanged per ASME B16.5), and operation (handwheel, gear, or actuator). Confirm API 598 test and MTC 3.1 for export.
API 600 WCB Gate Valve Selection Guide
Technical guide · Supreme Valves India · August 2026
WCB (ASTM A216) gate valves per API 600 are the default isolation valve on steam, boiler, and process pipelines worldwide. This guide covers class selection, trim, and documentation for buyers sourcing from India.
Frequently asked questions
Class 150 vs Class 300 WCB gate?
Class 150 suits general steam/water to ~285 psi at ambient; Class 300 for higher pressure/temperature per B16.34 rating tables.
What trim for steam?
SS410 (13% Cr) is standard on WCB gate valves for steam; upgrade to SS316 or Stellite for erosive or corrosive condensate.
Is API 600 same as API 598?
No. API 600 is design; API 598 is the factory test standard applied to the finished valve.
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