Malaysia Coking Plant Project purchase API Gate Valves and Globe Valves
2024-05-06
API Gate Valves and Globe Valves: Core Control Solutions for Harsh WorkingConditions of Chemical Plant I. Typical Application Scenarios and Valve Selection Logic in the Chemical Industry Chemical plants' core components, such as reactor systems, media transport pipelines, and tail gas treatment sections, generally face the triple challenges of high temperatures (300-600℃), high pressures (Class 150-2500LB), and strong corrosion (acids/alkalis/hydrogen sulfide), and the media are often flammable, explosive, or toxic. API valves, adhering to stringent standards such as API 600 (gate valves) and API 623 (globe valves), have become the mainstream choice. II. API Gate Valves: Core Guarantee for High-Pressure Cut-off and Smooth Transport Typical Application Case 1. Coking Plant Gas Main Pipeline In March 2022, our company provided an API 600 gate valve (Z41Y-150LB) to a coking plant in Malaysia for gas cut-off control in the coke oven heating pipeline. This operating condition includes 350℃ high-temperature coal gas, hydrogen sulfide corrosion, and coal tar particle erosion. The valves utilize: ◦ WCB carbon steel valve body + Stellite alloy welded gate (hardness HRC35-40) to resist particle abrasion; ◦ An elastic wedge gate compensates for temperature difference gaps, combined with a metal hard seal to achieve zero leakage. After commissioning, it operated without failure for 18 consecutive months, reducing downtime maintenance and saving over one million yuan in costs. Core Advantages 1. Extreme Condition Adaptability: Materials include duplex steel, Monel alloy, and other special materials, capable of handling temperatures from -196℃ to 600℃. The Class 2500LB pressure rating is suitable for ultra-high pressure reaction systems.
2.Low-Resistance, High-Efficiency Transportation: The full-bore design reduces flow resistance to near the pipe itself, resulting in up to a 15% reduction in annual energy consumption for transporting large-flow media (such as crude oil and solvents). 3. Redundant Sealing Safety: The double sealing structure of bellows and graphite packing ensures zero external leakage for toxic media, meets API 607 fire safety standards, and eliminates the risk of explosion caused by leakage. III.APIGate Valve: Key Equipment for Precise Regulation and High-Risk Isolation Typical Application Case
In April 2022, our company supplied API 623 gate valves to a petrochemical ethylene plant in Indonesia for steam temperature control in the reactor jacket. The conical seal uses a WCB + Stellite welded valve disc, with a leakage rate of <0.001% of rated flow. Spring-loaded packing automatically compensates for wear, and the electric actuator, in conjunction with the positioner, achieves precise steam flow regulation, improving reaction yield. Stable continuous operation for 24 months without maintenance was achieved, reducing unplanned downtime losses. ◦ Employs linear sealing with Stellite alloy overlay on the valve disc to achieve Class V sealing (leakage <0.001% of rated flow); ◦ The electric actuator, combined with a self-tightening packing system, maintains sealing performance after 1500 cycles. Core Advantages 1. High-Precision Flow Control: The linear sealing characteristics of the valve disc and seat allow for a control ratio of up to 100:1, suitable for scenarios requiring precise control, such as reactor feeding and steam heating. 2. Bidirectional Sealing Flexibility: Some models support bidirectional shut-off, eliminating the need to consider media flow direction during installation and reducing construction difficulty in complex pipeline layouts. 3. Long Maintenance Cycle: Spring-loaded packing automatically compensates for wear, and with hardened internal components, the average maintenance cycle reaches 24 months (compared to approximately 18 months for standard gate valves).
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