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Gate Valves

Gate valves are versatile flow control devices designed for on-off service in piping systems, suitable for both above-ground and underground installations. Their robust construction ensures reliable performance in various applications.

Available in cast and forged steel, gate valves are critical in industries like oil and gas, water treatment, and power generation, offering durability and cost-effective solutions, especially for underground systems where replacement costs are high.

Gate Valves

Gate valves operate by raising or lowering a gate to control fluid flow, providing minimal pressure drop when fully open and a tight seal when closed. Their design makes them ideal for applications requiring full flow or complete shut-off, but they are not suited for throttling. Cast steel gate valves are used in larger, high-pressure systems, while forged steel variants are preferred for smaller, high-integrity applications. Selecting the right valve type is crucial, particularly for underground installations, to minimize maintenance and replacement costs.

Key Properties of Gate Valves

  • On-Off Control: Provides full flow or complete shut-off with minimal pressure loss.
  • Versatility: Suitable for above-ground and underground installations.
  • Durability: Cast and forged steel options ensure long-term reliability.
  • Connection Options: Available in RF, RTJ, NPT, and SW for diverse applications.

Common Standards and Materials

Gate valves are manufactured to meet rigorous industry standards, ensuring performance and compatibility in various systems.

Type/Standard Material Application
Cast Steel: API 600, BS1414, BS1873, BS1868 Carbon Steel, Stainless Steel Oil and gas, power generation
Forged Steel: API 602, BS5352 Carbon Steel, Stainless Steel High-pressure, small-diameter piping

Applications of Gate Valves

Gate valves are essential in industries requiring reliable flow control:

  • Oil and Gas: Used in pipelines and refineries for shut-off services.
  • Water Treatment: Controls flow in distribution and treatment systems.
  • Power Generation: Manages steam and water flow in power plants.
  • Chemical Processing: Handles fluids in processing lines.

Specifications

Properties Values & Limits
Material Cast Steel, Forged Steel
Standards API 600, BS1414, BS1873, BS1868 (Cast); API 602, BS5352 (Forged)
Connection RF, RTJ, NPT, SW
Size Range 2" to 48" (Cast); 1/2" to 2" (Forged)
Pressure Rating Up to ANSI Class 1500 lbs

Considerations for Use

  • Installation Type: Choose appropriate valve for above-ground or underground use to minimize replacement costs.
  • Not for Throttling: Avoid using for flow regulation to prevent gate damage.
  • Material Selection: Match valve material to fluid and environment to prevent corrosion.