One-Stop Solutions for Industrial Applications
Standard specifications listed below. Custom sizes, materials, pressure classes, and end connections available upon request.
ISO 9001:2015 | API 607 Fire-Safe | ISO 15848 Low Emission | Full Bore & Reduced Bore
Custom Floating Ball Valves
With engineering expertise since 2003, we have been designing and manufacturing floating ball valves for customers across oil & gas, chemical, power generation, and water treatment industries. Our engineering team understands the technical demands of each application — from material compatibility to pressure and temperature requirements.
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Materials: Wide selection of body (WCB, CF8/CF8M, duplex, Monel, Inconel), seat (PTFE, PEEK, Stellite-hardfaced metal), ball and stem materials.
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Design: Custom sizes (½″ to 10″), pressure ratings (Class 150 to 600), end connections (flanged, threaded, socket-weld, butt-weld), full or reduced bore.
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Coatings: Nickel plating, tungsten carbide coating, and specialized finishes for wear and corrosion resistance.
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Actuator Integration: ISO 5211 mounting pads or custom brackets for electric/pneumatic actuators.
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Branding: Custom nameplates, logo stamping, packaging, and full documentation (EN 10204 3.1/3.2, test reports, O&M manuals).
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Certifications: NACE MR0175, ATEX, PED, DNV GL, and low-temperature services (-196°C) available.
- Custom Design: Finite element analysis (FEA) to validate strength and sealing performance under your specific conditions.
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Prototyping: Trial orders (2-5 pieces) available for performance validation before full-scale production.
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Documentation: Full certification package including EN 10204 3.1/3.2 material certificates, hydrostatic/pneumatic test reports, and O&M manuals.
Authoritative Standards & Compliance Certification
Floating Ball Valve Selection Guide
Full Bore vs. Reduced Bore
Seat Material Selection
| Seat Material | Temperature Range | Best For |
|---|---|---|
| PTFE / RPTFE | -29°C to +200°C | General service, water, gas, mild chemicals |
| PEEK | Up to +250°C | High-temperature, high-pressure, frequent operation |
| POM (Acetal) | -40°C to +100°C | Water, gas, lower-cost applications |
| PCTFE | Cryogenic to +150°C | Low-temperature services |
Fire-Safe Design
Fire-safe valves maintain a secondary metal-to-metal seal in the event of a fire that destroys the primary PTFE seats. This prevents catastrophic leakage and meets API 607 or API 6FA certification requirements. For critical safety applications (oil & gas, refineries, LNG), fire-safe design is often mandatory.
Anti-Static Design
For flammable media (hydrocarbons, natural gas, solvents), an anti-static device ensures electrical continuity between the ball, stem, and body. This prevents static charge buildup and potential ignition.
Blowout-Proof Stem
The valve stem is designed with an integral collar that prevents ejection under pressure, even if the packing gland fails. This is a critical safety feature for high-pressure and hazardous services.
Floating Ball Valve – Key Features & Benefits
Floating vs. Trunnion Ball Valve
Understanding the difference between these two designs is critical for proper valve selection. The choice typically comes down to operating pressure, pipe size, and application requirements.
| Feature | Floating Ball Valve | Trunnion Ball Valve |
|---|---|---|
| Ball Support | Free-floating (no bearings) | Fixed on trunnion bearings |
| Sealing Principle | Line pressure pushes ball against downstream seat | Spring-loaded seats press against fixed ball |
| Operating Torque | Increases with pressure | Relatively constant (spring-driven) |
| Practical Size Limit | Up to 8″–10″ (above this, torque is excessive) | 60″+ |
| Pressure Classes | Class 150–600 | Class 150–2500 |
| Double Block & Bleed | Not available | Yes (both seats seal independently) |
| Best For | Small-to-medium lines, general isolation, lower cost | Large-diameter, high-pressure, pipeline isolation |
| Standard | API 608 | API 6D, API 608 |
Frequently Asked Questions
Soft-seated (PTFE/RPTFE) valves provide bubble-tight shut-off (zero leakage) but have temperature limitations (typically up to 200°C) and may be damaged by abrasive media. Metal-seated (hard-faced) valves withstand higher temperatures (up to 450°C) and abrasive slurries, but typically have higher leakage rates (Class IV or V) – they are not zero-leakage. Choose based on your priority: tight shut-off or extreme conditions.
Yes. All our floating ball valves feature ISO 5211 standard mounting pads, compatible with electric, pneumatic, and hydraulic actuators from major brands. We support 0-10V, 4-20mA, Modbus RTU, BACnet MS/TP, and MP-Bus protocols for seamless integration with your DCS, PLC, or building automation system. Pre-mounted actuators can be supplied upon request.
Yes, our floating ball valves are certified to API 607 and API 6FA fire-safe standards. This means in the event of a fire that destroys the soft PTFE/RPTFE seats, a secondary metal-to-metal sealing contact between the ball and valve body is activated, preventing leakage of flammable media even after the fire is extinguished.
Full-bore (full-port) valves have a ball with an inner diameter equal to the pipe’s ID, offering zero flow restriction – ideal for pigging operations and minimal pressure drop. Reduced-bore (standard-port) valves have a smaller ball bore, which reduces valve size, weight, and cost, but creates some flow restriction – suitable for most general industrial applications where pigging is not required.
Common seat materials include PTFE (standard, -196°C to 200°C), RPTFE (reinforced, better wear resistance), PEEK (high temperature up to 300°C, suitable for steam and high-pressure applications), and Nylon (good for abrasive media). Selection depends on operating temperature, pressure, and media characteristics. Contact our engineers for a specific recommendation.
Choose floating ball valve for pipe sizes up to 8 inches and pressures up to Class 1500. The floating ball design uses line pressure to push the ball against the downstream seat, creating tighter sealing as pressure increases. For larger diameters (above 8 inches) or higher pressures (Class 2500+), choose trunnion mounted ball valve to reduce operating torque and prevent excessive seat wear.
| Stage | Procedure | Description |
|---|---|---|
| Before Production | PMI (Positive Material Identification) test | Raw material verification |
| In-Production | Dimensional checks | At critical machining stages |
| Post-Production | High-pressure hydrostatic shell test (1.5× rated pressure) Low-pressure air seat test (0.6 MPa) to verify shut-off Optional tests: helium leak test (ISO 15848), fire-safe test, or cryogenic test | Final assembly testing |
| Quality Inspection | Marking verification, coating/painting thickness measurement, and preparation of traceable test reports | Visual & documentary check |
All test records are archived for a minimum of 10 years and can be provided with each shipment. Or you can specify any third-party test institutions.
Our manufacturing facility is certified to ISO 9001:2015 for design, production, and after-sales service of industrial valves. Additionally, we hold ISO 14001:2015 (environmental management) and ISO 45001:2018 (occupational health and safety). All our ball valves for the European market comply with PED 2014/68/EU, and we can supply valves with ATEX certification for explosive atmospheres upon request. Our quality system is audited annually by third-party notified bodies.
Absolutely. For standard ball valves, we can offer off-the-shelf samples of common sizes (1/2″ to 4″) at a discounted price, with a refundable deposit that can be credited toward a future bulk order. For custom or larger sizes, we accept small trial orders (as few as 2–5 pieces) after a non-recurring engineering (NRE) fee is agreed. The NRE fee will be waived once the customer proceeds to a production order of 50 pieces or more.
We offer flexible payment terms based on order value and customer history. For standard orders: 30% deposit by T/T (wire transfer) with 70% balance before shipping. For larger or repeat customers, we can consider 20% deposit + 80% balance payment.
- For standard models, the minimum order quantity (MOQ) is usually 100 pieces per size. For sizes that are in stock, it takes 3 to 5 business days to ship after you place your order. Our usual lead time for making standard catalog valves that aren’t in stock is 15 to 25 business days after we get your order and approve the drawing.
- Custom models (with special materials, pressure classes, actuator mounting, custom logos, etc.): The minimum order quantity (MOQ) varies, so please get in touch with our sales team for a full quote. The lead time is usually 15 to 45 days, depending on how complicated the process is. Also, we offer a mixed-model consolidation service for distributors to help them deal with their inventory problems.
