Cast Steel Gate Valve - ANSI Class 300Lb - API 600, 2" to 36"
We supply ANSI Class 300Lb Cast Steel Gate Valve as a professional manufacturer and supplier, engineered for higher pressure and more demanding service conditions than standard Class 150 designs. Manufactured in accordance with API 600 and API 6D, this cast steel gate valve features rising stem OS&Y, bolted bonnet construction, and flexible or solid wedge design with enhanced wall thickness for superior pressure containment. Available in sizes 2″ to 36″ (DN50 to DN900) with pressure rating ANSI Class 300Lbs (CL300) — ideal for high-pressure steam, boiler feedwater, refinery processes, and critical industrial applications where safety and reliability are paramount. End connections include flanged (RF) and butt weld (BW). Materials include carbon steel (WCB, LCB), stainless steel (CF8, CF8M, CF3, CF3M), alloy steel (WC6, WC9, C5, C12), and duplex stainless steel (4A, 5A). Actuation options include manual handwheel, gear operated (recommended for larger sizes), and bare stem for electric actuator.
Cast Steel Wedge Gate Valve for Class 300Lb
• Design & Manufacture: ANSI B16.34, API 600, API 6D
• Construction: Outside Screw and Yoke (OS&Y), Bolted Bonnet, Solid or Flexible Wedge Design — heavy-duty construction with thicker wall sections
• Size Range: 2″ to 36″ (DN50 to DN900)
• Pressure Rating: ANSI Class 300Lbs (CL300) — engineered for high-pressure and critical service
• End Connections: Flanged (RF), Butt Weld (BW)
• Body Materials: WCB, LCB, CF8, CF8M, CF3, CF3M, WC6, WC9, C5, C12, 4A, 5A or Equivalent
• Trim Materials: Various trim materials are available to suit different service conditions, such as Trim 1#, 5#, 8#, 12#
• Actuator Type: Manual Handwheel, Gear Operated (recommended for 8″ and above), Electric Actuator (Bare Stem)
• Sour Service: NACE MR 0175
✓ Designed for critical applications — enhanced safety factor and pressure integrity
Gate Valve 300LBS Main Parts and Materials
| Part Name | Material | ||
|---|---|---|---|
| Carbon Steel (WCB) | Stainless Steel (CF8 / CF8M) | Alloy Steel (WC6 / WC9) | |
| Body | A216 WCB | A351 CF8 / CF8M | A217 WC6 / WC9 |
| Bonnet | A216 WCB | A351 CF8 / CF8M | A217 WC6 / WC9 |
| Wedge / Disc | WCB + 13Cr / STL | CF8 / CF8M | WC6 / WC9 + 13Cr / STL |
| Seat | 13Cr / STL | SS304 / SS316 | 13Cr / STL |
| Stem | A182 F6a / F304 / F316 | A182 F304 / F316 | A182 F6a / F304 / F316 |
| Bolts / Nuts | A193 B7 / A194 2H | A193 B8 / A194 8, B8M / 8M | A193 B7 / A194 2H |
| Gasket | Graphite / PTFE | Graphite / PTFE | Graphite / PTFE |
| Packing | Graphite / PTFE | Graphite / PTFE | Graphite / PTFE |
Reference: API 600, API 6D, ANSI B16.34. Materials may vary by model and pressure rating. Contact us for confirmed material certificate.
Cast Steel Gate Valve Dimensions - ANSI Class 300Lb
| NPS (inch) | DN (mm) | L (RF) mm | L1 (BW) mm |
|---|---|---|---|
| 2 | 50 | 216 | 216 |
| 2 1/2 | 65 | 241 | 241 |
| 3 | 80 | 282 | 283 |
| 4 | 100 | 305 | 305 |
| 6 | 150 | 403 | 403 |
| 8 | 200 | 419 | 419 |
| 10 | 250 | 457 | 457 |
| 12 | 300 | 502 | 502 |
| 14 | 350 | 762 | 762 |
| 16 | 400 | 838 | 838 |
| 18 | 450 | 914 | 914 |
| 20 | 500 | 991 | 991 |
| 24 | 600 | 1143 | 1143 |
| 28 | 700 | 1346 | 1372 |
| 30 | 750 | 1397 | 1422 |
| 32 | 800 | 1524 | 1524 |
| 34 | 850 | 1626 | 1626 |
| 36 | 900 | 1727 | 1756 |
Reference: API 600, API 6D, ANSI B16.10. Dimensions may vary by manufacturer. Contact us for confirmed drawing and quotation.
Reference Drawing: Cast Steel Gate Valve Class 300Lb Dimensions.
Industrial Gate Valve Dimension Details
Typical Applications of 300Lb Cast Steel Gate Valve
• High-pressure steam systems: power plant main steam and auxiliary steam lines requiring reliable isolation.
• Boiler feedwater: medium-high pressure feedwater lines in power generation and industrial boilers.
• Refinery and petrochemical: process lines with elevated pressure and temperature service conditions.
• Oil & gas transmission: medium-high pressure gathering, transmission, and distribution pipelines.
• Chemical plants: corrosive media handling with CF8 / CF8M / alloy steel options.
• Critical industrial service: applications requiring enhanced wall thickness and safety factor.
FAQ - Cast Steel Gate Valve ANSI Class 300Lb
Q1: What is a Class 300Lb cast steel gate valve?
A: A Class 300Lb cast steel gate valve is a linear motion valve designed for on-off service in higher pressure pipelines. It uses a wedge-shaped disc that slides up and down to open or close the flow path. It is manufactured to API 600 / API 6D / ANSI B16.34 and is rated for ANSI Class 300 (approximately PN50) pressure.
Q2: What is the difference between Class 150 and Class 300 gate valves?
A: Class 300 gate valves have thicker wall sections, heavier flanges, and higher pressure-containing capability than Class 150. They are suitable for higher pressure and temperature service, such as boiler feedwater, refinery processes, and high-pressure steam systems. Class 150 is preferred for general low-pressure service.
Q3: What is the difference between gate valve and globe valve?
A: A gate valve uses a wedge that moves perpendicular to the flow, providing full bore flow with minimal pressure drop — ideal for on-off service. A globe valve uses a plug that moves along the flow axis, providing better throttling and flow regulation — ideal for modulating service. Gate valves should not be used for throttling.
Q4: What materials are available for 300Lb gate valves?
A: Common body materials include WCB, LCB, CF8, CF8M, CF3, CF3M, WC6, WC9, C5, C12, 4A, and 5A. Various trim materials such as 13Cr, STL, SS304, and SS316 (Trim 1#, 5#, 8#, 12#) are available to suit different service conditions.
Q5: What actuation options are available?
A: Actuation options include manual handwheel, gear operated (recommended for 8″ and above), and bare stem for electric actuator. Other options are available on request.
Q6: Is NACE MR 0175 available for 300Lb gate valves?
A: Yes. NACE MR 0175 compliance is available for sour service applications. Please specify this requirement when requesting a quotation.
Get a Fast Quote for 300Lb Cast Steel Gate Valve
Send us your size, pressure rating, material, end connection, actuation type, and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
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