API Cast Steel Gate Valve

API Gate Valve refers to gate valves manufactured in strict accordance with American Petroleum Institute (API) standards, mainly API 6D and API 600. As internationally‑used high‑pressure industrial gate valves for the petroleum, chemical and energy industries, they feature high strength, high pressure resistance, corrosion resistance and zero‑leakage performance, suitable for severe working conditions.

Core Advantages:

● Extremely low flow resistance, resulting in significant energy savings;

● Reliable sealing performance, suitable for high-pressure and high-temperature conditions;

● Bidirectional flow, with no restriction on media flow direction;

● Simple structure, low maintenance costs, and long service life.

I. Core Functions and Roles

1) Media Flow Control (Main Function) Gate valves achieve full-open/full-close control through the vertical movement of the gate, without throttling or regulating functions. When fully open, the flow path is straight with near-zero resistance, reducing energy consumption during transport; when fully closed, zero-leakage shut-off is achieved through hard or elastic seals, preventing backflow and leakage.

2) Low Flow Resistance for Long-Distance Transport The straight-through flow path design ensures almost no pressure loss when the fluid is fully open, making it particularly suitable for long-distance pipelines carrying media such as crude oil, natural gas, and industrial water, significantly reducing transport energy consumption and system pressure drop. 3) High Pressure and High Temperature Compatibility: Gate valves made of cast steel/alloy steel (such as WCB) can withstand high pressure (up to Class 2500 and above) and high temperature (up to 550℃ and above), making them suitable for extreme conditions such as power plant boiler feedwater and hydrocracking in oil refining units.

4) Safety Isolation and Maintenance Assurance: As a "safety disconnection point" in the pipeline system, they quickly cut off the medium during equipment maintenance and accident handling, achieving physical isolation between upstream and downstream pipelines and preventing medium leakage or accident escalation.