Direct answer · Updated 26 October 2026
How do I RFQ a WCB Class 300 gate valve?
Send size, RF flanged ends, trim (13Cr typical), operator (handwheel / gear) and quantity. Class 300 WCB gates to API 600 appear when the line list exceeds Class 150 allowable pressure at design temperature.
Request a quotation · +91 97732 78770 · info@supremevalves.in
RFQ: WCB Gate Valve Class 300
Step up from Class 150 when the P&ID calls ASME Class 300 RF carbon-steel isolation.
Why this page exists (11 similar lines in our RFQ archive)
Class 300 gate BOQs sit between utility Class 150 and high-pressure Class 600 steam packages — same API 600 pattern, higher flange rating.
Across 952 recent quotation / BOQ lines synced into our RFQ system, this type–material–class pattern appears repeatedly. Pages like this match how EPC and trading houses write enquiries — not brochure marketing copy.
Real BOQ wording we see
- GATE VALVE, 6 INCH, CLASS 300, RF FLANGED, ASTM A216 WCB, API 600, OS&Y RISING STEM, SS410 TRIM, HANDWHEEL
- GATE VALVE DN150 CL300 RF WCB BODY 13CR TRIM BOLTED BONNET API 600 / API 598
Paste your full line list — we return a techno-commercial offer with MTC and test scope.
What we supply against this RFQ pattern
What to send with your enquiry
- Size + Class 300
- Trim / Stellite?
- Gear for ≥DN200?
- Qty + destination
Send the line list or datasheet to info@supremevalves.in or use the quote builder. Technical clarifications and a priced offer follow within one working day for standard items.
Related products and guides
WCB Class 150 gate RFQ
Lower class.
WCB Class 600 gate RFQ
Higher class.
WCB gate manufacturer
All classes.
WCB type comparison
Ball vs gate vs globe vs check.
Frequently asked questions
Is Class 300 the same face-to-face as Class 150?
No — use ASME B16.10 Class 300 face-to-face; do not interchange Class 150 bodies on Class 300 flanges.
When Class 300 vs Class 600?
Follow the pipe class / line list. Class 600 is typical for higher steam and hydrocarbon ratings; Class 300 for intermediate process.
About this page: Written by the Supreme Valves India engineering team, Ahmedabad (supplying industrial valves since 1986). Last reviewed 26 October 2026. Figures are typical values for selection; the governing values are those in the referenced standard and on the approved datasheet for each order. Entity facts: Supreme Valves brand facts.
Send your Class 300 WCB gate BOQ
Send size, pressure rating, material, end connection and service. Engineering response within one working day.