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Guar gum powder, also known as guar gum flour, is a natural polysaccharide powder produced from the endosperm of guar beans through drying, grinding and screening processes. As a recognised natural thickener, guar gum powder is widely used in the food industry: 0.15%‑0.25% added to ice cream controls ice crystal growth, 0.2%‑0.6% added to flour products improves elasticity, and beverages use it for thickening and preventing sedimentation.
In food applications, only a small amount of guar gum powder is typically needed to achieve the desired thickening effect. However, the prerequisite for "effectiveness in small quantities" is that the guar gum powder itself has sufficiently high purity and sufficiently uniform fineness. In actual production, the screening accuracy of guar gum powder directly determines its thickening performance, dissolution rate and the quality consistency of the final food products.
High‑quality guar gum powder on the market has extremely strict particle size requirements – the passing rate through a 130‑mesh screen must reach over 95%, and some premium products require fineness above 325 mesh. This means that screening equipment must operate continuously and stably under high‑mesh conditions, ensuring that the particle size distribution of every batch falls within the strict process window.
The reason why guar gum powder screening is a recognised challenge lies in three inherent material characteristics.
First, high hygroscopicity causing screen adhesion. Guar gum powder has significant hygroscopicity and becomes sticky after absorbing moisture. During screening, moisture‑affected powder adheres to the screen surface, gradually blocking the mesh openings and causing screening efficiency to drop rapidly.
Second, high fineness with stringent screening accuracy requirements. The conventional screening mesh size for guar gum powder ranges from 80 mesh to 200 mesh, with premium products requiring 325 mesh or finer. Under high‑mesh conditions, the screen apertures are extremely small, and any slight blinding directly affects screening accuracy and finished product pass rate.
Third, rapid moisture absorption upon exposure to air. During screening, the powder is fully exposed to air, accelerating moisture absorption. Once moisture‑affected, the powder loses flowability, further aggravating blinding and uneven screening.
These three dilemmas overlap, making guar gum powder a recognised "difficult‑to‑screen" material. When ordinary screening equipment handles guar gum powder, it often becomes blinded and requires stoppage for cleaning after just a few hours of operation – compromising both line efficiency and product quality.
In the design of linear vibrating screens, the screen width and length serve different functions. For a given material, the productivity (throughput) of a linear screen is mainly determined by screen width, while screening accuracy is mainly determined by screen length.
The logic behind this principle is straightforward: the longer the screen deck, the longer the material is screened on the screen surface, the more opportunities it has to pass through the mesh, and the higher the screening accuracy. When material moves on the screen surface, the "easy‑to‑screen" particles pass through the mesh in large numbers in the initial stage, and screening efficiency rises rapidly. However, once the easy‑to‑screen particles are mostly removed, the remaining "difficult‑to‑screen" particles require longer screening time to obtain the opportunity to pass through. For materials with high fineness and narrow particle size distribution, such as guar gum powder, the proportion of "difficult‑to‑screen" particles is relatively higher, making the demand for screen deck length more urgent.
The relationship between screen deck length and screening accuracy can be understood from three stages of the screening process. Stage one: after material enters the screen surface, "easy‑to‑screen" particles quickly pass through the mesh in the initial screening area, and screening efficiency rises rapidly. Stage two: as the "easy‑to‑screen" particles are gradually removed, the remaining material layer mainly consists of "difficult‑to‑screen" particles that are close to the mesh aperture size – at this point, a longer screen deck is needed to provide more opportunities for passage. Stage three: particles continue to move on the screen surface, repeatedly contacting the screen mesh, until the vast majority of target‑size particles have passed through.
Based on this principle, extended screen deck design becomes the key path to improving guar gum powder screening accuracy.
To address the material characteristics and screening difficulties of guar gum powder, Gaofu Machinery has systematically optimised the SZF series linear vibrating screen, with extended screen deck design being one of the core upgrades.
1. Extended Material Residence Time, Improving Passage Rate of Difficult‑to‑Screen Particles
Through extended screen deck design, the Gaofu linear vibrating screen for guar gum powder significantly increases the travel distance of material on the screen surface. For materials with high fineness and narrow particle size distribution, such as guar gum powder, an extended screen deck means every particle has more opportunities to contact the screen – particularly the "difficult‑to‑screen" particles close to the mesh aperture size, whose chance of passing through is greatly improved.
In actual screening, the extended screen deck brings a substantial improvement in screening accuracy. According to linear screen design experience, screening accuracy is difficult to guarantee when the screen deck length is less than 2 metres, while increasing the length beyond 6 metres has very limited additional improvement. The screen deck length of the Gaofu linear vibrating screen for guar gum powder is precisely calculated to ensure high accuracy while balancing equipment economy and floor space practicality.
2. Optimised Width‑to‑Length Ratio, Balancing Throughput and Accuracy
There is an optimal ratio between screen width and length. When the screen is narrow and very long, the material layer on the screen surface becomes too thick, making it difficult for fine particles to approach and pass through the mesh. Conversely, when the screen is wide but not long enough, the material residence time is too short, and the opportunity for passage is insufficient.
Industry practice suggests that the width‑to‑length ratio of a linear screen should generally be controlled between 1:2 and 1:3. The extended screen deck design of the Gaofu linear vibrating screen for guar gum powder strictly follows this ratio, ensuring screening accuracy while maintaining line capacity – avoiding capacity bottlenecks caused by one‑sided pursuit of accuracy.
3. Multi‑Deck Screen Configuration – One Feed, Multiple Fractions
The Gaofu SZF series linear vibrating screen supports 1 to 5 screen decks , allowing a single feed to complete multi‑stage particle size classification simultaneously. After guar gum powder enters from the feed port, powders of different particle sizes are separated on their respective screen decks and discharged from different outlets.
For manufacturers that need to produce different grades of guar gum powder, the multi‑deck design greatly reduces equipment investment and process transfer time. Coarse screening removes large impurities and fibres, fine screening obtains the target‑size finished powder, and ultra‑fine powder is discharged from the bottom deck – one machine completes classification that would otherwise require multiple screens in series.
4. Fully Enclosed Dust‑Proof Structure – Preventing Secondary Moisture Absorption
Guar gum powder quickly absorbs moisture upon contact with air, so effective control of material‑air contact is essential during screening. The Gaofu linear vibrating screen for guar gum powder features a fully enclosed frame structure , with screening taking place inside a sealed chamber, effectively blocking external moisture and preventing secondary moisture absorption and caking of the guar gum powder during screening.
The fully enclosed structure provides three assurances: preventing dust escape, improving the workshop environment; preventing foreign matter from entering the screening system, ensuring the purity of the guar gum powder; and reducing material loss, improving raw material utilisation.
5. Food‑Grade Stainless Steel – Ensuring Food Safety
Guar gum powder is used directly in food processing, so equipment materials must meet strict hygiene requirements. All material‑contact parts of the Gaofu linear vibrating screen for guar gum powder are made of food‑grade 304 stainless steel , with finely polished surfaces, no hygiene dead corners, and easy to clean. For production lines requiring even higher cleanliness, 316L stainless steel is available. The equipment complies with food GMP standards, eliminating the risk of metal contamination at the material source.
6. Quick Screen Changes – Adapting to Multi‑Variety Production
Different grades of guar gum powder require different mesh sizes – from conventional 80 mesh to premium 325 mesh. The Gaofu SZF series linear vibrating screen features a quick‑change screen structure , allowing screen changes in just 3 to 5 minutes. When switching between different products, screen changes are convenient and efficient, greatly reducing downtime.
From the perspective of actual production conditions in guar gum powder processing, the Gaofu linear vibrating screen with extended screen deck delivers value in four dimensions:
Accuracy value – The extended screen deck prolongs the residence time of material on the screen surface, giving "difficult‑to‑screen" particles more opportunities to pass through. The screening accuracy of guar gum powder is significantly improved, and finished particle size distribution is strictly controlled within process requirements – meeting the 95% passing rate through 130 mesh and even the 325‑mesh or finer standards for premium products.
Efficiency value – Multi‑deck screens complete multi‑stage classification with a single feed; the fully enclosed structure effectively controls moisture‑related blinding; impurities are automatically discharged without manual intervention; the equipment can run 24 hours continuously. The overall capacity of the production line is fully utilised.
Quality value – The extended screen deck ensures more thorough screening, resulting in uniform particle size and high‑purity guar gum powder. Downstream food manufacturers using the product benefit from stable thickening performance, rapid dissolution and reliable quality consistency.
Hygiene value – Food‑grade 304 stainless steel and the dead‑corner‑free design make the equipment easy to clean with no material residue; the fully enclosed structure effectively controls dust escape and secondary moisture absorption. This helps enterprises meet the hygiene requirements of food GMP and HACCP systems.
Food Industry Client Testimonials
Nestlé, CP Group, Haitian Flavour & Fragrance, Yihai Kerry, Yili, Mengniu,Shuanghui, Wahaha, Master Kong, Want Want, Anjoy Foods, Angel Yeast,Yangyuan Foods, Uni-President Enterprises, Qiaqia Food, Luhua Group,Alpenliebe, Golden Monkey, Orion, Xizhilang,Sanquan Foods, Synear Food, Oishi, Wong Lo Kat, Yanjing Beer, Seamild,Jinpai, Chubang, Hengshun Vinegar Industry, Longda Group, Beijing Daoxiangcun, Anhe Dairy,Weiwei Group, Xiangpiaopiao, Maiquer, Tianbing, Binqi Food, Ligao Okun
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
