Cast Steel Gate Valve - API 600, ANSI Class 150 to 2500
We supply Cast Steel Gate Valve as a professional manufacturer and supplier, manufactured in accordance with API 600 and API 6D. This cast steel gate valve features rising stem OS&Y, bolted bonnet or pressure seal bonnet construction, and flexible or solid wedge design. Available in sizes 2″ to 36″ (DN50 to DN900) with pressure ratings from ANSI Class 150Lb to 2500Lb. Materials include carbon steel (WCB, LCB), stainless steel (CF8, CF8M, CF3, CF3M), and alloy steel (WC6, WC9, C5, C12). Ideal for water, oil, gas, chemical, and petrochemical pipeline systems.
Handwheel, gear operated and bare stem for electric actuator gate valves are available for choice.
API Cast Steel Gate Valve Specifications
• Design & Manufacture: ANSI B16.34, API 600, API 6D
• Types of Wedge: Flexible Wedge, Solid Wedge
• Types of Bonnet: Bolted Bonnet, Pressure Seal Bonnet
• Types of Stem: Rising Stem (OS&Y), Non-Rising Stem
• Types of End Connections: Flanged, Butt Weld
• Types of Flange Face: Raised Face, Flat Face
• Types of Material: Carbon Steel, Alloy Steel, Stainless Steel (WCB, LCB, WC6, WC9, C5, C12, CF8, CF8M, CF8C, CF3, CF3M, 4A, 5A)
• Type of Trim: 410, 304, 316, Hard Faced, Full Hard Faced, Suit Different Service Conditions
• Type of Drive: Manual, Electric Actuator, Bare Stem
• Valve Size: 2″ to 36″ (DN50 to DN900)
• Valve Pressure: ANSI Class 150Lb, 300Lb, 600Lb, 900Lb, 1500Lb, 2500Lb
• Special Design: NACE MR 0175, Bypass Valve
✓ Available in multiple pressure classes and trim configurations for different service conditions
Cast Steel Gate Valve Main Parts & Materials
| Part Name | Material | ||||||
|---|---|---|---|---|---|---|---|
| A216-WCB | A351-CF8(M) | A351-CF3(M) | |||||
| Trim 1# | Trim 8# | Trim 5# | Trim 10# | Trim 12# | — | — | |
| Body | A216-WCB | A216-WCB | A216-WCB | A216-WCB | A216-WCB | A351-CF8(M) | A351-CF3(M) |
| Bonnet | A216-WCB | A216-WCB | A216-WCB | A216-WCB | A216-WCB | A351-CF8(M) | A351-CF3(M) |
| Disc | WCB + 13Cr | WCB + 13Cr | WCB + STL | WCB + 316 | WCB + 316 | A351-CF8(M) | A351-CF3(M) |
| Seat | 13Cr | Stellite | Stellite | 316SS | Stellite | Integral | Integral |
| Stem | A182-F6a | A182-F6a | A182-F6a | A182-F316 | A182-F316 | F304/316 | F304L/316L |
| Bolts / Nuts | B7 / 2H | B7 / 2H | B7 / 2H | B7 / 2H | B7 / 2H | B8(M) / 8(M) | B8(M) / 8(M) |
Reference: API 600, API 6D, ANSI B16.34. Trim numbers follow API 600 standard. Materials may vary by model and pressure rating. Contact us for confirmed material certificate.
API Cast Steel Gate Valve Dimensions
Typical Applications of Cast Steel Gate Valve
• Water distribution and treatment: municipal water supply, distribution networks, and water treatment plants.
• Oil & gas transmission: crude oil, natural gas, and refined product pipelines at various pressure classes.
• Refinery and petrochemical: process lines requiring reliable on-off isolation with full bore flow.
• Power generation: main steam, boiler feedwater, and cooling water systems from Class 150 to Class 2500.
• Chemical plants: corrosive media handling with CF8 / CF8M / CF3 / CF3M options.
• HVAC and fire protection: large diameter pipelines requiring low pressure drop and reliable shut-off.
FAQ - Cast Steel Gate Valve
Q1: What is a cast steel gate valve?
A: A cast steel gate valve is a linear motion valve designed for on-off service in pipelines. It uses a wedge-shaped disc that slides up and down to open or close the flow path, providing full bore flow with minimal pressure drop. It is manufactured to API 600 / API 6D / ANSI B16.34 and is available in pressure classes from ANSI 150 to 2500.
Q2: What is the difference between a gate valve and a 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.
Q3: What is the difference between OS&Y and NRS gate valves?
A: OS&Y (Outside Screw and Yoke) has a rising stem that visually indicates valve position, and the stem threads are outside the media, making it suitable for corrosive and high temperature service. NRS (Non-Rising Stem) has a non-rising stem, requiring less vertical space — commonly used in buried or space-limited installations.
Q4: What is the difference between bolted bonnet and pressure seal bonnet?
A: Bolted bonnet is suitable for general service up to Class 900 and is easy to maintain. Pressure seal bonnet (PSB) uses internal line pressure to tighten the seal, making it more suitable for very high pressure and high temperature applications (Class 900 and above). Both options are available depending on the pressure class and service conditions.
Q5: What materials and trim options are available?
A: Common body materials include WCB, LCB, WC6, WC9, C5, C12, CF8, CF8M, CF8C, CF3, CF3M, 4A, and 5A. Trim options include Trim 1# (13Cr), Trim 5# (Stellite), Trim 8# (13Cr + Stellite), Trim 10# (316SS), and Trim 12# (316SS + Stellite), selected based on service conditions.
Q6: What actuation options are available?
A: Actuation options include manual handwheel, gear operated (recommended for larger sizes and higher pressure classes), and bare stem for electric actuator. Other options such as pneumatic or hydraulic actuators are available on request.
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Email: sales@tengsvalve.com
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