Zhejiang Jigong Valve Co., Ltd. is one of the most reliable manufacturers and suppliers of full port valve balls in China. If you're going to wholesale cheap full port valve balls made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Basic Introduction
The Full Port Ball Valve Ball uses a flow channel diameter design close to or exactly the nominal diameter of the pipeline, resulting in a high degree of direct flow channel within the sphere. When the medium passes through, flow resistance is extremely low and flow loss is minimal, effectively maintaining the original flow characteristics and pressure levels of the pipeline system. Compared to conventional reduced-diameter valve balls, full-port valve balls significantly improve flow capacity, meeting the dual requirements of fast on-off control and low-energy operation in high-flow conveying scenarios. The sphere is precisely machined to ensure smooth and smooth inner walls of the runner. Combined with a high-quality sealing structure, it achieves large diameter flow while ensuring reliable cut-off sealing performance. The product has excellent circulation capability, making it especially suitable for water supply and drainage, fire protection systems, oil and gas transportation, urban pipeline networks, and various fluid control scenarios that require high pressure drop control and delivery efficiency.
Product Specification
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Indicator items |
Technical specifications |
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Size range |
1/2" to 48" (supports non-standard customization) |
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Pressure rating |
PN10-PN160(Class150-900) |
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Spherical material |
Carbon steel, stainless steel 304/316, alloy steel, etc |
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Manufacturing process |
Forging/casting + large-diameter runner processing + precision machining + sealing surface grinding |
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Coaxiality |
≤0.05mm |
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Roundness accuracy |
≤0.02mm |
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Surface roughness |
Ra ≤ 0.4 μm (sealing surface) |
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Outer diameter tolerance |
1/2" – 4": +0.03 mm |
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Inner diameter tolerance |
1/2" – 4": 0~+0.03 mm |
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Applicable temperature |
-196°C to 600°C (depending on spherical and sealing materials) |
Product Features
- The runner diameter is basically consistent with the nominal diameter of the pipeline (≥ 95% of the diameter design), maximizing the cross-section of medium flow and eliminating additional throttling resistance
- The flow channel is straight through and the inner wall is smooth, the flow direction of the medium does not change abruptly, and the flow resistance coefficient is extremely low, effectively reducing pressure drop along the pipeline system
- Large flow aperture design, with a flow coefficient (Cv/Kv) significantly higher than shrinking valve balls of the same specification, meeting the needs of rapid opening and closing of large flow rates
- Effectively avoids sudden changes in medium flow velocity, cavitation, and intensified erosion caused by reduced diameter structures, extending the service life of valves and pipelines
- Suitable for high-velocity, large-flow continuous conveying conditions, minimizing pumping energy consumption while maintaining cutoff function
- Convenient for cleaning/cleaning operations, with a full-diameter design that facilitates smooth passage of the pipeline cleaning device (PIG), meeting maintenance requirements
- Product specifications cover DN15~DN600 and above, and can be paired with various connection types such as flange, butt welding, socket welding
Product Application Scope / Usage Scenarios
Applicable media:
Clean water, raw water, firefighting water, seawater, oil products and refined oil, natural gas, city gas, chemical liquid media, compressed air, steam (depending on sealing material), etc
Applicable operating conditions:
High-flow rapid switching control, low-flow resistance and low-energy continuous transmission, pipeline cleaners passing through required operating conditions, pipeline systems with strict pressure drop limits, long-distance transmission trunk lines, and urban gas distribution networks
Application fields:
Urban water supply and drainage pipeline networks, fire water supply systems (sprinkler/fire hydrant networks), long-distance oil and gas pipelines and urban gas pipelines, chemical and petrochemical cooling water and high-flow process pipelines, power industry circulating water systems, ship and offshore platform pipeline transmission systems, high-flow sanitary delivery pipelines for food and beverages
FAQ
What is the difference between full-port valve balls and conventional reduced-diameter valve balls?
The core difference between the two lies in the diameter of the runner. The flow channel diameter of a full-port valve ball is basically the same as the nominal diameter of the pipeline (usually ≥ 95%), while the flow channel diameter of a reduced-diameter valve ball is smaller than that of the pipeline diameter (usually 60%~80% of the pipeline diameter). Full-port valve balls do not exhibit significant throttling effects when the medium passes through, resulting in extremely low flow resistance; The diameter reduction valve ball causes significant local resistance due to sudden narrowing and expansion of the flow channel, resulting in pressure loss and flow reduction.
How much can full-port valve balls improve pressure drop compared to shrinking valve balls?
The extent of improvement depends on the specific reduction ratio and flow conditions. Generally, the flow resistance coefficient (ζ value) of a full-port valve ball is only 1/5~1/3 that of a reduced-diameter valve ball of the same specification. Under the same flow conditions, the pressure drop of the full-port valve ball can be reduced by 50%~80%. For long-distance transmission pipelines and high-flow circulation systems, this pressure drop difference corresponds to significant energy savings in pumping consumption, resulting in significant economic benefits for long-term operation.
Is the full-port valve ball suitable for media containing particles or those prone to crystallization?
Applicable to the system. Full-port valve balls have a large flow channel diameter and smooth, smooth inner walls, making them less likely to clog than reduced-diameter valve balls. They have good passability for media containing small amounts of solid particles or fluids prone to crystallization. During pipe cleaning operations, the pipeline cleaner can pass through a full-diameter spherical flow channel without obstruction, which is especially important in oil and gas pipeline maintenance. If the medium contains a high particle content or is corrosive, it can be customized with hard sealing surfaces or wear-resistant coating solutions.
How can the flow capacity of full-port valve balls be quantified?
Flow capacity is commonly expressed as the flow coefficient Cv (imperial) or Kv (metric). Cv is defined as the flow of 60°F clean water through the valve (US gallons/minute) when the pressure difference across the valve is 1 psi. Under the same diameter and pressure differential conditions, the Cv/Kv value of a full-port valve ball is usually 1.5~2.5 times that of a reduced-diameter valve ball, with the specific value depending on the ratio of ball diameter to pipeline diameter and the smoothness of the runner inner wall. For precise selection, our company can provide Cv/Kv calculations and valve size selection recommendations based on operating parameters.
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