Zhejiang Jigong Valve Co., Ltd. is one of the most reliable manufacturers and suppliers of trunnion valve ball in China. If you're going to wholesale cheap trunnion valve ball made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Basic Introduction
Trunnion Mounted Valve Ball is a high-precision core component specially developed for heavy-duty ball valve systems. With integrated dual trunnion shafts at the top and bottom, it achieves stable and rigid positioning in the valve cavity, and only performs axial rotation without any offset or displacement. The product adopts a self-compensating sealing structure, whose sealing effect will not be disturbed by medium pressure changes or flow shocks, and can stably bear strong medium thrust in ultra-high pressure differential environments. Made of high-grade alloy materials and precision processing, it has superior structural strength, erosion resistance and long-term fatigue stability, which is perfectly compatible with harsh working conditions such as large-caliber pipelines, ultra-high pressure systems and abrasive particle media. It is widely used in critical flow regulation, emergency cut-off and continuous control of marine engineering, energy transmission, metallurgical equipment and chemical processing systems.
Product Specification
|
Indicator Item |
Technical Parameters |
|
Size Range |
2" to 56" |
|
Pressure Rating |
PN16-PN420(Class150-4500) |
|
Sphere Material |
Carbon Steel A105N/LF2, Austenitic Stainless Steel 304/316, Alloy Steel, Hastelloy, Monel Alloy, etc. |
|
Trunnion Material |
Same material as the sphere or high-strength alloy steel (such as F6a, 410 stainless steel) |
|
Coaxiality |
≤ 0.05mm (coaxiality of the sphere and the trunnion) |
|
Roundness accuracy |
≤0.02mm |
|
Surface hardness |
Sealing surface can reach HRC 55+ (Stellite surfacing) |
|
Surface Roughness |
Ra ≤ 0.4 μm (sealing surface) |
|
Outer diameter tolerance |
2" – 4": +0.03 mm |
|
Inner diameter tolerance |
2" – 4": 0~+0.03 mm |
|
Applicable Temperature |
-196°C to 1200°C (depending on the material of the sphere and sealing surface) |
Product Features
- Precision dual trunnion integrated design, stable positioning without axial deviation
- Self-compensating sealing system, stable performance under variable pressure and flow
- High-strength load-bearing structure, excellent impact resistance under high pressure differentials
- Hardened sealing surface, outstanding erosion resistance and extended service life
- Wide adaptability to temperature, corrosion and particle media, suitable for extreme working conditions
- Low operating torque, smooth action, supporting precise regulation and reliable shut-off
Product Application Scope / Usage Scenarios
Applicable Media:
Corrosive fluids, abrasive particle media, high-pressure gas-liquid mixtures, cryogenic & high-temperature media
Applicable Working Conditions:
Ultra-high pressure, large flow rate, wide temperature range, corrosive & abrasive harsh environments
Application Area:
Marine engineering, energy transmission systems, metallurgical equipment, chemical processing plants, petrochemical complexes
FAQ
What precision machining processes are used for this valve ball?
It adopts CNC precision machining, Stellite hard surfacing and ultra-precision grinding to ensure dimensional accuracy and surface performance.
What advantages does it have in high-pressure and abrasive working conditions?
It has rigid positioning, high surface hardness and erosion resistance, which can maintain stable operation and long service life in harsh environments.
Can the material and surface treatment be customized?
Yes, we can customize alloy materials and surface hardening treatments according to your working medium, temperature and pressure requirements.
What is the difference between this product and floating valve balls?
It features rigid trunnion fixation, lower operating torque, stronger pressure bearing capacity, and is specially designed for large-diameter and heavy-duty working conditions.
How to ensure the sealing stability of the valve ball for long-term use?
High-precision coaxiality, ultra-smooth sealing surface and self-compensating structure work together to ensure long-term stable sealing performance.
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