Zhongcheng Machinery's Isolation Manual Butterfly Valve is a specialized quarter-turn pipeline control component engineered for oilfield solid control and mud circulation systems. Designed with compact structural integrity, this valve delivers flexible manual control combined with excellent wear resistance and reliable sealing performance. For precise flow control and speedy pipeline on-off operation, our valve has a fast 90-degree disc rotation. Constructed from a high-strength corrosion-resistant alloy, it functions well in temperatures between -29°C and 120°C and can sustain pressures up to PN25 (Class 300). Produced by a business with more than 30 years of experience with machines and ISO 9001/14001/45001 certifications, you get anti-blockage, leak-proof performance with little upkeep. Each unit undergoes thorough shell and seat pressure testing following API 598 requirements.
Our valve specifications are tailored for demanding drilling fluid environments:
| Parameter | Specification |
|---|---|
| Pressure Rating | PN10 to PN25 (Class 150/300) |
| Temperature Range | -29°C to 120°C (resilient seat) / up to 425°C (metal seat) |
| Disc Rotation | 90-degree quarter-turn |
| Sealing Type | Bi-directional, bubble-tight shut-off |
| Body Material | High-strength corrosion-resistant alloy |
| Seat Material | EPDM, Viton, or PTFE (customizable) |
| Operator Types | Lever, handwheel, or worm gear |
| Leakage Rate | Rate A per ISO 5208 (zero visible leakage) |
| Mounting Standard | ISO 5211 top-flange |
| Coating Protection | Epoxy (minimum 250 microns FBE) |
| Size Range | DN50 to DN600 (2" to 24") |
Your drilling operations demand reliability under extreme conditions. Our Isolation Manual Butterfly Valve addresses these challenges through innovative engineering.
The small structural design can save up to 40% of the installation space when compared to traditional gate valves. This simplified shape reduces weight while maintaining exceptional strength-to-mass ratios.
Bi-directional sealing characteristics ensure leak-proof performance regardless of flow direction. The sturdy seat prevents drilling fluid leaks that could contaminate the environment or damage equipment by offering bubble-tight separation.
Superior wear resistance and pressure-bearing capability are provided by high-strength alloy construction. Even in abrasive mud circulation situations with solid particles, you gain a prolonged service life.
By minimizing pressure drop across the valve, the low-profile disc design maximizes system effectiveness. When handling high-volume fluid transfer in solid control applications, this function is especially helpful.
Even at maximum differential pressure, the ergonomic design of manual operators keeps force requirements below 400N. Worm gear operators provide smooth, safe control for valves bigger than DN200 or applications demanding torque more than 50 Nm.
This manual butterfly valve performs critical functions across multiple drilling scenarios.
In drilling fluid conveying systems, it provides rapid isolation of shale shakers, desanders, and desilters during maintenance cycles. The quarter-turn operation enables quick response when equipment requires inspection or cleaning.
The valve controls the flow between centrifuges, agitators, and mixing tanks in mud circulation pipelines. Drilling mud that contains solids is handled by its anti-blockage design without sacrificing the integrity of the seal.
It isolates mud cleaners and vacuum degassers for solid control mud systems, enabling you to service specific parts without stopping the circulation loop as a whole. This keeps operations running smoothly and reduces downtime.
Dead-end service applications that need the removal of downstream piping while preserving upstream pressure are supported by lug-style setups. During drilling campaigns, this adaptability makes system upgrades easier.
Quality assurance is non-negotiable in oilfield equipment. Every Isolation Manual Butterfly Valve undergoes rigorous inspection protocols.
Shell and seat pressure testing per API 598 and ISO 5208 standards verifies casting integrity and sealing interface performance. Each valve must achieve Rate A leakage classification—zero visible leakage throughout the test duration.
Each valve body and disc comes with material traceability paperwork (MTC EN 10204 3.1). This guarantees compatibility with your particular drilling fluid chemistry and avoids galvanic corrosion problems.
Coating thickness testing confirms epoxy protection meets minimum 250-micron FBE standards. This atmospheric barrier extends service life in harsh oilfield environments exposed to salt spray and high humidity.
Torque testing validates that manual operation remains within ergonomic limits across the valve's rated pressure range. You receive equipment that operators can safely control without excessive physical strain.
BV, TÜV, HSE, ISO 9001, ISO 14001, and ISO 45001 certifications are all held by our manufacturing facilities. These qualifications show our dedication to worker safety, environmental responsibility, and quality.
Your installation process is streamlined through standardized design features. ISO 5211 top-flange mounting ensures compatibility with various manual operators without custom modifications.
The valve installs in any orientation without performance degradation. Flanged connections follow ANSI, DIN, or JIS standards based on your regional requirements.
Maintenance demands are minimal due to the robust construction. For resilient-seated versions, inspect seals every 6 months in continuous-duty applications. Metal-seated variants extend inspection intervals to 12 months.
Gear housing lubrication should occur every 6 to 12 months depending on environmental exposure. High-humidity or salt-spray conditions require more frequent attention.
Seat replacement procedures require no special tools. You can perform field maintenance using standard wrenches and following our comprehensive operation manuals. This reduces dependency on specialized technicians and lowers lifetime ownership costs.
Zhongcheng Machinery provides flexible customization to match your specific operational requirements. Standard specifications cover most applications, but you may request modifications to dimensions, seat materials, and operator configurations.
Domestic and international motor brand options are available when you integrate actuators for automated control. Our engineering team assists with sizing calculations to ensure proper torque margins.
Every order includes complete technical documentation: engineering drawings, flowcharts, component diagrams, and operation/maintenance manuals. This package accelerates commissioning and supports your training programs.
We offer industry-specific training for maintenance personnel, covering proper operation procedures, troubleshooting techniques, and seal replacement protocols. This Knowledge transfer enhances your team's capabilities.
Our one-year warranty covers manufacturing defects and material failures. Beyond warranty periods, you access ongoing technical guidance from our professional service team with decades of oilfield experience.
Delivery timelines support your project schedules. In-stock products ship within 3 days. Customized orders requiring special configurations deliver within 15 days. Our logistics partnerships with Tianjin and Shanghai ports ensure efficient international shipping.
Q: When should I choose a gear operator over a lever for my manual butterfly valve?
A: Gear operators are recommended for valves larger than DN200 (8 inches) or high-pressure applications where operating torque exceeds 50Nm. This ensures safe and smooth manual control without excessive physical effort.
Q: Can this valve be used for dead-end service applications?
A: Yes, but only the Lug-style configuration is suitable for dead-end service. This design allows you to remove downstream piping while maintaining upstream pressure for maintenance flexibility.
Q: How do I ensure the seat material is compatible with my drilling fluid?
A: Seat selection must be based on chemical compatibility charts. EPDM works well for water-based muds, while Viton or PTFE is required for oil-based drilling fluids and corrosive additives.
Q: What leakage rate should I expect from this isolation valve?
A: For resilient-seated versions, the standard is Rate A per ISO 5208—zero visible leakage for the test duration. This ensures you achieve bubble-tight shut-off in critical isolation applications.
Q: How often should the manual gear mechanism be lubricated?
A: Depending on the weather, check and lube the gear housing every six to twelve months. More frequent maintenance intervals are needed in areas with high humidity or salt spray.
Q: Is this valve suitable for bi-directional flow applications?
A: Definitely. For mud circulation systems where flow patterns may reverse during operations, the sealing design offers dependable performance regardless of flow direction.
Ready to enhance your solid control system reliability with our Isolation Manual Butterfly Valve? Contact our technical team at oliver@zcgukong.com for customized solutions, technical specifications, and quotations tailored to your drilling operations.
February 28, 2024
Anonymous, On-site Drilling Engineer, Domestic Oilfield Operator
Zhongcheng’s mud circulation system has been running continuously at our Xinjiang desert site for 8 months, with no major breakdowns or costly operational halts. Its solid build and wear-resistant components have helped keep our maintenance and repair costs in check. In the harsh downhole conditions here, its durability reliably meets our daily operational needs.
January 15, 2025
Anonymous, Technical Project Lead, International Oilfield Service Provider
We had an urgent need for a custom mud zero-discharge system for a coalbed methane project, and Zhongcheng delivered. Their engineering team locked in the designand shipped the full system in 45 days, and it integrated perfectly with our existing ZJ50 rig. On-site commissioning even finished ahead of schedule. Their technical know-how and speed are exactly what we need for time-sensitive projects.
February 28, 2024
Anonymous, On-site Drilling Engineer, Domestic Oilfield Operator
Zhongcheng’s mud circulation system has been running continuously at our Xinjiang desert site for 8 months, with no major breakdowns or costly operational halts. Its solid build and wear-resistant components have helped keep our maintenance and repair costs in check. In the harsh downhole conditions here, its durability reliably meets our daily operational needs.
January 15, 2025
Anonymous, Technical Project Lead, International Oilfield Service Provider
We had an urgent need for a custom mud zero-discharge system for a coalbed methane project, and Zhongcheng delivered. Their engineering team locked in the designand shipped the full system in 45 days, and it integrated perfectly with our existing ZJ50 rig. On-site commissioning even finished ahead of schedule. Their technical know-how and speed are exactly what we need for time-sensitive projects.
