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HYCOA® 6-Way Transfer Valve
6-Way Transfer Valve Maintenance & Repair Instructions
Engineered for reliability, maintainability, and zero-leakage performance. The HYCOA 6-Way Transfer Valve is purpose-built for critical fluid systems where uptime, safety, and controlled transfer are non-negotiable.
Built for Efficient Maintenance in Demanding Environments
The HYCOA® 6-Way Transfer Valve is purpose-built for critical fluid systems where uptime, safety, and controlled transfer are non-negotiable. Its internal architecture is designed not only for zero-leakage operation, but also for efficient maintenance, repeatable sealing performance, and long service life — even in the most demanding power generation and industrial environments.
Every step in the maintenance process reflects a valve designed by engineers who understand plant realities. The result is shorter maintenance windows and higher confidence during reassembly.
The Bottom Line
The HYCOA® 6-Way Transfer Valve is not just designed to perform — it is designed to be maintained correctly, repeatedly, and efficiently, without compromising sealing integrity. This is a transfer valve engineered for long-term ownership value.
Video Guide
Transfer Valve Rebuild — Step by Step
Watch a complete HYCOA Transfer Valve rebuild from disassembly through reassembly. This video covers internal stack removal, seal replacement, sealing pad indexing, and reassembly to zero-leakage performance.
Disassembly
Internal stack removal
Seal Replacement
Lip seals, O-rings & retainers
Pad Indexing
Precision sealing pad alignment
Reassembly
Return to zero-leakage spec
Step-by-Step Guide
Changing Soft Parts & Shoe Assemblies
HYCOA / JR-33 6-Way Transfer Valve — based on the official JR33 IOM and 6-Way repair instructions. Follow each step in sequence for a safe, correct rebuild.
Step 1 of 10
Before You Start
Shut down the system, isolate the valve, and relieve ALL pressure before removing any parts.
Safety First
- 1Shut down the system.
- 2Isolate the valve from the process.
- 3Relieve all pressure.
- 4Drain the valve and connected piping as needed.
- 5Make sure the valve is safe to work on before removing any parts.
Recommended Tools
- Pin punches
- Wrenches / socket tools
- Compatible lubricant for seals
- Replacement soft parts kit
- Replacement shoe / sealing pad assemblies if required
- Clean workbench
- Marker or notebook for recording shoe turns
Quick Technician Checklist
0 / 14 completeMaintenance-Focused Design Features
Designed for Complete Internal Serviceability
Unlike conventional transfer valves that require extensive disassembly or complete valve removal, the HYCOA 6-Way Transfer Valve features a modular internal stack design.
- Internal components are removed as a single assembly
- Valve bodies remain installed in the line
- Reduced outage time during inspections or seal replacement
- Lower labor costs and safer maintenance procedures
Positive Sealing Control During Maintenance
The valve's dual-handle actuation system — including the T-Handle and Ball Handle — provides precise control of sealing pad position during operation and maintenance.
- Sealing pads can be fully retracted before disassembly
- Mechanical stops prevent over-travel and component damage
- Controlled positioning protects sealing surfaces during service
- Reduces risk of maintenance-induced failures and extends seal life
Precision-Engineered Internal Stack Assembly
At the heart of the valve is the Internal Stack, which integrates upper and lower sealing pads, slide/link assemblies, sleeves, separator plate, operating shaft, and multiple sealing elements.
- Upper and lower sealing pads
- Slide/link assemblies
- Sleeves, separator plate, and operating shaft
- Multiple sealing elements — lip seals, O-rings, retainers
Repeatable Sealing Pad Alignment for Zero Leakage
A critical feature of the HYCOA 6-Way Transfer Valve is its adjustable sealing pad system. Sealing pads are indexed and recorded during disassembly, then reinstalled to the exact original position.
- Pads indexed and recorded during disassembly
- Reinstalled to exact original position
- Ensures consistent sealing geometry after maintenance
- Eliminates guesswork — valve returns to factory-level sealing performance
Robust Sealing System Designed for Long Life
The valve incorporates multiple lip seals, O-rings, and seal retainers, each positioned to isolate pressure zones and prevent leakage between flow paths.
- Superior pressure containment
- Protection against internal bypass
- Long seal life when properly lubricated with compatible fluids
- Excellent performance in oil and hydraulic services
Heavy-Duty Mechanical Construction
Internal components such as the operating shaft, sleeves, and slide/link assemblies are designed for high mechanical strength, resistance to wear during frequent cycling, and stable alignment under pressure and temperature variation.
- High mechanical strength throughout
- Resistance to wear during frequent cycling
- Stable alignment under pressure and temperature variation
- Roll pins and linkages sized to prevent binding
Maintenance Designed for the Real World
Every step in the maintenance process reflects a valve designed by engineers who understand plant realities.
- Roll pins are sized to prevent protrusion and binding
- Seals are easily accessible and replaceable
- Lubrication requirements are clearly defined
- Components are modular and intuitive
Supports Reliability-Centered Maintenance
The HYCOA 6-Way Transfer Valve is ideal for facilities practicing reliability-centered maintenance.
- Predictable service procedures
- Minimal disturbance to piping systems
- Clear inspection points
- Consistent post-maintenance performance
Designed for Power Generation & Critical Oil Systems
These are applications where internal leakage or maintenance errors cannot be tolerated.
- Turbine lube oil transfer systems
- API 614 lubrication skids
- Main/standby pump changeover circuits
- Cooler and filter transfer applications
- High-reliability oil and hydraulic systems
Need Spare Parts or Technical Support?
Our team can provide replacement seal kits, internal stack assemblies, and technical guidance for HYCOA 6-Way Transfer Valve maintenance.
HYCOA® JR-33
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3-Way Transfer Valve
Single flow path switching
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Inlet + outlet in one body
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6-Way Same-Side
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6-Way Opposite Side
Opposing supply & return lines
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2″ – 12″ large-bore service
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