Is Class 4500 catalogue-standard?
It is specialty high-pressure construction. Offers are usually budgetary pending schedule and trim confirmation.
RFQ-intent page · October 2026 enquiry language · Updated 16 October 2026
Who manufactures F91 Class 4500 butt-weld globe valves for high-pressure steam?
Supreme Valves India quotes budgetary forged F91 (ASTM A182 Gr. F91) pressure-seal globe valves for Class 4500 / high-bar steam duty with butt-weld ends. Schedule, trim, IBR, and design temperature are confirmed before firm manufacture.
Typical RFQ specification
- Body: ASTM A182 Gr. F91 (common RFQ wording: F91 / 250 bar class)
- Design: pressure-seal bonnet, manual globe, BW ends
- Typical size band on RFQs: DN25 to DN50
- Confirm: pipe schedule, trim, IBR, design temp (often to 600 C on power RFQs)
Buyer FAQ
IBR required?
State IBR if the steam line is IBR-registered. Not assumed unless specified.
Lead time?
Longer than standard WCB Class 150 — confirm on quotation.
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