Why Can the NTS Series Gyratory Screen Achieve 95%–99% Screening Efficiency?

In fine screening and high-demand classification conditions, screening efficiency is a core indicator for evaluating screening equipment performance. Especially under conditions involving medium-to-fine particles, materials prone to agglomeration, or high-throughput continuous production, traditional vibrating screens often suffer from efficiency fluctuations and insufficient screening.

The NTS series gyratory screen launched by Navector (Shanghai) Screening Technology Co., Ltd. has demonstrated stable screening efficiencies of 95%–99% across multiple industrial applications. This performance is not achieved by enhancing a single parameter, but rather through systematic optimization based on screening physics, particle motion behavior, and engineering structural design.

I. What Is the Essence of Screening Efficiency?

• What factors determine screening efficiency?

From a screening theory perspective, screening efficiency mainly depends on the following three aspects:
the effective contact between particles and apertures, the continuous openness of apertures during operation, and the probability that particles obtain multiple opportunities to pass through the apertures.

• In conventional vibrating screens, material motion is driven by high frequency or large amplitude vibration. Although throughput is high, the following issues often occur:

obvious material jumping with short contact time with the apertures,
insufficient stratification, making it difficult for fine particles to settle,
low effective utilization of the screen surface.
These are the fundamental reasons why traditional vibrating screens are limited in efficiency during fine classification.

II. Core Principle of the NTS Series Gyratory Screen: Simulating Manual Screening

• Why is manual screening often more efficient?

The characteristics of manual screening include:
primarily horizontal planar motion, long material residence time, and multidirectional, repeated contact between particles and apertures.

The NTS series gyratory screen mechanically recreates the behavior of manual screening through engineered structures.
Planar gyratory motion: allowing particles to “walk on the screen” rather than “jump on the screen.”

The NTS series adopts low-speed, long-stroke planar gyratory motion. The screen box moves along an approximately elliptical or circular trajectory within the horizontal plane, causing the material on the screen surface to exhibit:

• continuous and gentle dispersive motion,
• automatic spreading to avoid localized accumulation,
• natural separation of coarse and fine particles.

Particles are not thrown upward but guided to move along the screen surface, fundamentally improving controllability of the screening process.

III. High Screen Surface Utilization Is the Basis for High Efficiency

• What is screen surface utilization?

Screen surface utilization refers to:
effective area actually participating in screening ÷ total screen area.
In conventional vibrating screens, due to material concentration and uneven motion, the actual effective screening area is usually less than 70%.

• How does the NTS series improve screen surface participation?

Through optimization of motion trajectory and screen structure, Navector achieves the following in the NTS series gyratory screen:
uniform material distribution across the screen surface,
stable and controllable material layer thickness,
almost no dead zones on the screen surface.
Under stable operating conditions, the effective screening area of the NTS series can exceed 90%, providing a necessary prerequisite for achieving 95%–99% screening efficiency.

IV. Full Stratification Is a Key Condition for High-Efficiency Screening

Before screening, particle stratification must first be completed. The prerequisite for effective screening is that fine particles can smoothly settle to the screen surface.
Through low-acceleration planar motion, the NTS series gyratory screen enables the material on the screen surface to naturally form:
upper layer: coarse particles,
middle layer: near-size particles,
lower layer: fine particles.
This stratification mode is more stable and less easily disrupted, allowing fine particles to continuously contact the apertures and complete the screening process.

V. Longer Residence Time Creates More Screening Opportunities

• Why does residence time determine screening results?

The passage of an individual particle through an aperture is essentially a probabilistic process requiring multiple attempts.

• The NTS series gyratory screen features:

longer screen paths, controllable material conveying speed, and significantly increased particle residence time on the screen surface.
This allows fine particles to obtain multiple screening opportunities on the same screen surface, thereby substantially improving screening efficiency.

VI. Engineering Structure Ensures Long-Term Efficiency Stability

• Key structural optimizations by Navector

To ensure that high efficiency can be maintained over the long term, the NTS series has undergone systematic engineering optimization:
uniform stress distribution on the screen mesh with stable tensioning,
low-acceleration operation to reduce screen fatigue,
smooth equipment operation with minimal efficiency degradation.
As a result, the 95%–99% screening efficiency is not a short-term test result, but a stable performance metric achievable in long-term operation.

VII. High-Efficiency Application Scenarios for the NTS Series Gyratory Screen

The NTS series gyratory screen is particularly suitable for the following operating conditions:
precise classification of medium-to-fine particles,
high-throughput continuous production,
process stages with stringent requirements for screening consistency,
production lines that do not allow fluctuations in screening yield.
Therefore, it is widely used in fine chemicals, metal powders, new energy materials, food, and functional powder industries.

Conclusion: 95%–99% Efficiency Comes from Systematic Design

The ability of the NTS series gyratory screen to achieve 95%–99% screening efficiency does not rely on higher amplitude or frequency, but is based on:
planar gyratory motion that aligns more closely with the physical principles of screening, higher screen surface utilization, more thorough and stable particle stratification, and mature, reliable engineered structural design.
Within Navector’s screening technology system, the NTS series gyratory screen is a professional screening solution oriented toward high efficiency and high consistency.