Delayed Coker Valve Repair & Field Service

Delayed Coker Valve Repair & Service

We provide delayed coker valve repair, weld overlay, and field machining services. From coke drum isolation valves to large bore ball valves, we support both in-shop rebuilds and on-site repair to restore sealing performance and extend valve life.

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How We support coker valve Reliability

Delayed coker valves are exposed to extreme heat, abrasive coke fines, and frequent cycling—leading to wear, leakage, and loss of isolation.

JS helps you repair instead of replace by restoring critical components and sealing surfaces.

We offer:

Weld repair and hardfacing for worn areas
Machining to restore bores and sealing surfaces
Field service support during outages
Full testing and documentation before return to service
Grinding and machining services to restore bores and sealing surfaces

Coker Valve Repair Advantages

Extend Valve Life

Rebuild worn sealing surfaces and critical components using weld overlay and machining, reducing the need for full valve replacement.

Reduce Turnaround Cost

Repairing delayed coker valves is typically faster and more cost-effective than sourcing new OEM valves with long lead times.

Restore Sealing Performance

Precision machining and hardfacing help bring valves back to proper isolation in high-temperature, abrasive service.

On-Site Repair Capability

Field service teams can perform machining and weld repair at your facility, minimizing removal and reinstallation delays.

Field Service Support

Mobilization to Site

JS field service teams provide on-site repair during turnarounds and emergency situations, helping reduce downtime and avoid extended outages.

On-site machining and weld repair
Line boring and sealing surface restoration
Stud removal and flange repair
Mobile machine shop deployment

Nationwide service is available for both planned outages and urgent repair needs.

Capabilities & Applications

JS Machine & Valve provides repair and restoration services for delayed coker valves operating in high-temperature, erosive refinery environments. Our capabilities are built to address wear from coke fines, thermal cycling, and heavy service conditions.

Core capabilities include:

Weld overlay and erosion-resistant hardfacing
Precision machining and bore restoration
Base material rebuild and sealing surface repair
Stem repair, fabrication, and component replacement
Large valve handling and rebuild capability

Supported valves include: delayed coker ball valves, isolation valves, control valves, and other large bore severe-service valves.

This service is commonly used in delayed coking units, refinery turnarounds, and other applications where valve reliability is critical in abrasive and high-heat conditions.

Documentation & Quality Assurance

All delayed coker valve repairs are verified through testing and inspection to ensure performance in severe service conditions. Each valve is tracked throughout the process, providing full visibility from initial evaluation through final testing.

Testing and inspection capabilities include:

Pressure testing per API 598 and API 6D
Helium and methane leak testing (as required)
Dye penetrant inspection for weld integrity
Hardness testing and material verification (PMI)

Documentation provided includes:

Before and after photos
Dimensional inspection reports
Weld repair documentation
Material verification (PMI)
Final test reports

This approach ensures each valve meets required standards and is fully documented prior to return to service.

Why JS Machine & Valve

JS combines severe-service expertise with full repair and field capabilities, allowing customers to move quickly from inspection to repair and back into operation.