Engineered for optimal, heavy-duty isolation in high-pressure and high-temperature environments, Cast Carbon Steel Gate Valves deliver uncompromising fluid control and operational safety. Built in strict accordance with API 600 standards, these valves feature an Outside Screw & Yoke (OS&Y) design with a rising stem and integral backseat arrangement for secure online gland packing replacement under pressure.
Manufactured using high-grade ASTM A216 Grade WCB carbon steel and equipped with renewable SS 410 (13% Cr.) working trim components, our gate valves provide exceptional resistance against wear, thermal stress, and mechanical fatigue. Available across pressure classes from #150 through #2500, with versatile connection options including Flanged, Butt-Weld, Screwed (NPT), and Socket Weld ends, these valves serve as a dependable defense for critical pipeline operations nationwide and globally.
Technical Details of Gate Valve
- Manufacturing Std:Ā API: 600/API: 602
- Testing & Inspection Std:Ā API: 598
- Face To Face:Ā As per ANSI B 16.10
- End Connection:Ā Flanged as per ANSI B 16.5 & 26ā and above ANSI B16.47 Series A & B
- Shell Wall Thickness:Ā ANSI B 16.34
- Socket Weld And Threaded To:Ā ANSI B 16.11 / ANSI B 1.20.1
- Butt Weld Ends:Ā As per ANSI B16.25
Technical Specifications
| Feature | Specification Details |
| Body Material | Cast Carbon Steel (ASTM A216 Grade WCB) |
| Design Standard | API 600 / BS 1414 / ASME B16.34 |
| Stem & Bonnet Type | OS&Y (Outside Screw & Yoke), Bolted Bonnet / Pressure Seal Bonnet |
| Internal Trim | Renewable Stainless Steel 410 (13% Chromium) / Stellite Hardfaced |
| Pressure Ratings | Class 150, 300, 600, 900, 1500 |
| End Connections | Flanged Ends, Butt-Weld (BW), Screwed (NPT), Socket Weld (SW) |
| Actuation Options | Handwheel, Bevel Gear, Electrical Actuator, Pneumatic Actuator |
Structure & Operating Principle
A Gate Valve operates as a linear-motion isolation valve. The internal mechanism consists of a flat or wedge-shaped gate connected to a threaded stem, raised or lowered by turning a handwheel or actuator.
- Open Position: The wedge is fully retracted into the bonnet area, completely clear of the flow passage. This creates a straight-through flow path with minimal friction loss.
- Closed Position: The stem drives the wedge down into the valve body seats, forming a tight barrier that completely blocks fluid flow.
Note on Application: Gate valves are specifically engineered for full-open or full-closed on/off isolation service. They are not recommended for throttling or flow regulation, as partial opening can lead to severe seat erosion and flow-induced vibration.
Key Benefits & Engineering Advantages
- Unrestricted Full-Bore Flow: Designed with a full-port opening that aligns precisely with pipe internal diameters, drastically reducing pressure drop and fluid turbulence across the valve body.
- Bi-Directional Positive Shutoff: The precision-ground wedge provides a tight mechanical seal on both upstream and downstream faces, ensuring reliable isolation for critical process fluids.
- Backseat Arrangement: Allows stem packing inspection and maintenance while the valve is fully open under line pressure, preventing external fugitive emissions.
- Heavy-Duty Construction: Engineered to perform under harsh mechanical load, thermal cycles, and severe service environments.
- Custom Actuation & Automation Ready: Easily configurable for manual, gear-assisted, or automated remote control setups.
Special Features & Optional Customizations
- Gear Operation: Fitted with heavy-duty bevel gearboxes for operating torques exceeding 350 NĀ·m.
- Electrical & Pneumatic Actuation: Seamlessly integrated with motorized electric actuators for automated remote control systems.
- Position Monitoring & Limit Switches: Optional limit switch arrangements for open/close feedback and mechanical position indicators.
- Hardfaced Seating (Stelliting): Stellite cobalt-base alloy hardfacing available on seating surfaces for abrasive or high-temperature service.
- NACE MR0175 / ISO 15156 Compliance: Optional sour-gas treatment for sulfide stress-cracking resistance in oil and gas processes.
- IBR Certification: Indian Boiler Regulations (IBR) certified designs available for steam and power generation lines.
- Safety & Security: Integrated locking mechanisms to prevent unauthorized manual operation.
Typical Industry Applications
- Oil & Gas / Refining: Hydrocarbon processing, crude pipelines, natural gas transmission, and offshore platforms.
- Power Generation: High-pressure steam systems, boiler feed lines, and auxiliary cooling water.
- Chemical & Petrochemical: Chemical transfer lines, severe service applications, and fugitive emission-controlled plants.
- Water & Wastewater Treatment: High-capacity municipal water distribution, sewage pumping stations, and industrial effluent management.
- Specialized Media Services: Cryogenic service, hydrogen distribution, and high-purity oxygen process lines.
| VALVE MATERIAL SPECIFICATION CHART | ||||||||||
| Material Grades & Corresponding Component Specifications | ||||||||||
| Part No. | Part Name | WCB | WC6 | WC9 | C5 | C12 | LCB | LCC | CF8 | CF8M |
| 01-02 | Body & Bonnet | A 216 WCB | A 217 WC6 | A 217 WC9 | A 217 C5 | A 217 C12 | A 352 LCB | A 352 LCC | A 351 CF8 | A 351 CF8M |
| 03 | Wedge | A 216 WCB | A 217 WC6 | A 217 WC9 | A 217 C5 | A 217 C12 | A 352 LCB | A 352 LCC | A 351 CF8 | A 351 CF8M |
| 04 | Seat Ring | A 105 | A 182 F11 | A 182 F22 | A 182 F5 | A 182 F9 | A 350 LF2 | A 350 LF2 | Integral | Integral |
| 05 | Stem | See Trim Material Table | ||||||||
| 08 | BackSeat Bushing | See Trim Material Table | ||||||||
| 06 | Gland Flange | A 216 WCB | A 217 WC6 | A 217 WC9 | A 217 C5 | A 217 C12 | A 352 LCB | A 352 LCC | A 351 CF8 | A 351 CF8M |
| 11-12 | Bonnet Stud & Nuts | ASTM A193 Gr. B7 / ASTM A 194 Gr. 2H | ASTM A193 Gr. B7 / ASTM A 194 Gr. 2H | A193 B16 / A194 Gr. 4/7 | A193 B16 / A194 Gr. 4/7 | A193 B16 / A194 Gr. 4/7 | ASTM A193 Gr. B7 / ASTM A 194 Gr. 2H | ASTM A193 Gr. B7 / ASTM A 194 Gr. 2H | A193 Gr. B8 / A194 Gr. 8 | A193 Gr. B8M / A194 Gr. 8M |
| 10 | Gland Packing | Graphite Ring, Metallic Wire Reinforced | PTFE | PTFE | ||||||
| 09 | Gasket | S.S.304 / S.S.316 Spiral Wound Gasket with Grafoil Filler | PTFE | PTFE | ||||||
| 13 | Hand Wheel | Ductile or Malleable Iron | Stainless Steel | Stainless Steel | ||||||
| 07 | Yoke | A 216 WCB | A 217 WC6 | A 217 WC9 | A 217 C5 | A 217 C12 | A 352 LCB | A 352 LCC | A 351 CF8 | A 351 CF8M |