Roots Blower for Powder Pneumatic Conveying | Shangu (Mingtian Machinery) Complete Closed-conveying Solutions

In industries such as building materials, grain & oil processing, chemical engineering, metallurgy, power generation and feed production, traditional conveying methods for powder and granular materials bring prominent pain points: dust emission, material loss, poor on-site working conditions and high labour costs. Closed-loop powder pneumatic conveying uses Roots blowers to deliver stable positive-displacement airflow, transporting powder and granular materials through pipelines in fully-sealed status. It minimizes material leakage and has become a mainstream process option for powder-handling projects.

As the core air source of the whole pneumatic conveying system, manufacturing standards, parameter conversion accuracy, wear-resistance and continuous-operation reliability of Roots blowers directly determine system performance. Unqualified equipment may result in pipe blockage, air-volume attenuation and unplanned shutdowns. Shandong Mingtian Machinery Group, under brand Shangu, is a national-level Specialized, Refined, Differential & Innovative “Little-Giant” enterprise. We supply a full portfolio of Roots blower products complying with Chinese industrial standards. We also provide working-condition recalculation and unit-conversion service for overseas export projects. We deliver integrated solutions including blower selection, complete accessories and technical support for domestic end-users and global complete-set-equipment suppliers.

1. Applicable Product Standards

Valid Chinese Domestic Standards

1. JB/T 8941.1-2014 General-purpose Roots blowers — Part 1: Technical specifications (Current valid) It specifies overall material requirements, vibration limits and intake-medium conditions. Maximum allowable intake temperature ≤45 °C; solid-particle content in intake medium ≤100 mg/m³. It serves as the fundamental standard for manufacturing and inspection of Roots blowers for powder conveying.

Note for powder-handling applications: Dust content of intake air must be controlled; otherwise, impellers and bearings will suffer accelerated wear.

• JB/T 8941.2-2014 General-purpose Roots blowers — Part 2: Performance test methods (Current valid) Defines factory test benchmarks for airflow, pressure and shaft power. All performance data in Mingtian official catalogues are obtained under standard intake conditions: 20 °C, absolute pressure 101.325 kPa, relative humidity 65%. Marked Qs in datasheets refers to inlet flow under this standard condition.
• GB/T 2888-2008 Methods of noise measurement for fans and Roots blowers Mandatory noise-measurement standard to meet factory environmenQ8=Qn X1.0732otection acceptance requirements.
• GB 28381-2012 Limited values of energy efficiency and energy efficiency grades for blowers Energy-efficiency evaluation for long-term-operation projects.

Important note on international-standard equivalence: Test procedures specified in JB/T 8941.2-2014 refer to ISO 1217 positive-displacement compressors acceptance test standard, but are NOT equivalent. Domestic Chinese test reports cannot directly replace ISO 1217 compliant reports for overseas projects. For export powder-conveying orders, performance recalculation based on actual overseas working conditions shall be performed; do not directly apply catalogue Qs parameters.

Critical Unit Conversion (For domestic & overseas projects, built-in our product catalogue)

Definition: Qs = catalogue-listed inlet flow (m³/min) under standard intake state. Overseas clients commonly use CFM for flow; pressure units include kPa, kgf/cm², PSI and mmHg.

1. Flow conversion: 1m3/min=35.314 CFM
2. Pressure conversion:9.8kPa = 0.1kgf/cm2 = 73.5mmHg = 1.422PSI
3. Flow conversion from reference state (0 °C) to standard intake state (20 °C): Qs = Qn × 1.0732                                               

✨ Practical industry pitfalls (rarely published online):

1. Many purchasers confuse reference-state flow Nm³/min (0 °C) with catalogue-listed standard-state Qs (20 °C). Direct adoption will cause insufficient actual airflow and pipe blockage. For high-altitude sites or intake temperature deviating from 20 °C, flow-pressure recalculation is mandatory instead of directly using catalogue tables.
2. For powder-conveying systems, pipe elbows, reducers and valves generate extra resistance. 10-15 % safety margin for airflow and pressure shall be reserved during selection. Many site failures are caused by underestimated pipeline losses rather than blower defects.
3. Damp powder tends to absorb moisture and agglomerate, sticking to impeller surfaces. For negative-pressure powder-suction systems, material back-flow into blower chamber may happen upon shutdown. Besides the main blower unit, check valves, blow-off valves, vacuum safety valves and intake filters must be fully equipped. Most field malfunctions originate from missing pipeline accessories, not blower hardware quality.
4. Standard blowers cannot endure long-term erosion from abrasive powder. Custom impeller wear-resistant coating and reinforced sealing structures are required; standard units applied directly in heavy-abrasive powder service will suffer rapid wear and airflow degradation.

2. Powder Conveying Challenges & Customer Key Concerns

Powder materials cover grain flour, fly ash, lime powder, chemical powder, coal powder and more. Conveying modes include positive-pressure dilute-phase conveying, negative-pressure suction conveying and suction-pressure combined conveying. Buyers evaluate equipment beyond pricing, focusing on the points below:

1. Stable positive-displacement airflow: Minimize airflow attenuation under fluctuating pipeline resistance to avoid production shutdown caused by pipe clogging.
2. 24/7 continuous-operation reliability: High-precision dynamic balancing for impellers; vibration performance meets JB/T 8941.1-2014 limits to cut downtime & maintenance.
3. Anti-dust-erosion performance: Reliable intake filtration and sealing solutions; wear-resistant customised options for abrasive-powder working conditions.
4. Sufficient performance margin: Compensate for pipeline resistance, air leakage and material-humidity variation.
5. Noise & environmental compliance: Complete silencer packages for plants near residential zones.
6. Complete accessory packages: Silencers, flexible joints, safety valves, blow-off valves and filters to reduce extra integration work for customers.
7. Low maintenance cost: Universal spare parts with short delivery lead-time.
8. Custom-building capability: Wear-resistant coating, explosion-proof motors, water-cooled design, variable-frequency control cabinets for flammable or high-temperature powder.
9. Export-oriented requirements: Imperial-unit datasheets (CFM / PSI), English catalogues, special-voltage motors, performance recalculation per ISO working-condition requirements.

3. Mingtian Shangu Model Matching for Powder Pneumatic Conveying

Our product portfolio includes MTS, RSR, MTR-V vacuum pumps, MTRF / MTRG heavy-duty Roots blowers. Performance range: flow 0.6-1057 m³/min, pressure rise 9.8-196 kPa. Product lines cover small-lab powder-feeding equipment up to large-scale power-plant, building-material-plant and port powder-handling projects.

Series	Working Pressure	Flow Range	Typical Powder-industry Applications
MTS 3-lobed Roots Blower (Belt-drive)	9.8-98 kPa positive pressure	1.1-60 m³/min	Small-to-medium feed mills, grain-oil plants, small-scale building-material powder dilute-phase positive-pressure conveying. Compact layout. Optional intelligent control cabinet for no-load start-stop. Fit for intermittent-production small-and-medium-size powder production lines.
RSR 3-lobed Roots Blower (Belt-drive / Direct-coupling)	9.8-98 kPa positive pressure	0.6-184 m³/min	General-purpose workhorse for powder conveying: fly ash, wheat flour, starch, ordinary chemical-powder transportation. High spare-part compatibility. Complete silencer & safety-accessory packages available. Suitable for 24-hour continuous-duty operation.
MTR-V Roots Vacuum Pump (Negative-pressure series)	-9.8 ~ -49 kPa negative pressure	1-420 m³/min	Preferred unit for negative-pressure powder suction: powder suction & powder-loading systems. Must be matched with cyclone dust -efficiency intake filters to prevent powder ingress into blower main unit.
MTRF / MTRG Heavy-duty Roots Blower	9.8-147 kPa positive pressure	40-1057 m³/min	Large-scale building-material plants, power-plant fly-ash conveying, long-distance high-throughput dilute-dense-phase powder conveying. Water-cooled construction for heavy-duty long-time high-pressure running. Custom wear-resistant impeller coating available.

Model-selection tips

1. For small-to-medium throughput & short-distance powder conveying (5-20 tons/h): Prioritize MTS or small-frame RSR models.
2. For negative-pressure powder suction & powder-loading: Adopt MTR-V vacuum pumps.
3. For long conveying distance, multiple elbows, high lifting height or abrasive powder: Choose MTRF / MTRG heavy-duty models. Calculate full-set pipeline resistance and reserve sufficient pressure-airflow margin.
4. For coal powder or flammable-and-explosive powder: Explosion-proof motor and reinforced sealing are available. For damp, heavily-abrasive powder, custom wear-resistant impeller protection coating can reduce adhesion-caused wear.

4. Core Advantages of Mingtian Shangu Products

1. Strong R&D & Manufacturing Capacity: National-level High-tech Enterprise & Specialized-Refined-Differentiated-Innovative Little-Giant Enterprise. Technical team includes professor-level senior engineers, PHD and master-degree specialists. Equipped with 5-axis machining centers and high-speed dynamic-balancing test benches. Every impeller undergoes high-precision dynamic balancing. Unit-vibration performance exceeds the limit value specified in JB/T 8941.1-2014 for low-failure long-time running.
2. Credible Performance Data: Each unit passes factory performance test complying with JB/T 8941.2-2014. We provide professional flow-pressure correction for high-altitude sites or abnormal intake-temperature to eliminate wrong-model-selection risks.
3. Flexible Configuration & Complete Delivery: Belt-drive or direct-coupling options. Available accessories: inlet / outlet silencers, air filters, safety valves, check valves, blow-off valves, flexible expansion joints, PLC intelligent control cabinets (no-load startup & overload protection). Custom base / flange dimension support for legacy powder-conveying-system retrofitting projects.
4. Dual support for domestic & export orders: Chinese / English catalogues, dual-set datasheets in m³/min & CFM. Custom special-voltage motors are offered for global powder-equipment OEM customers.
5. Professional Technical Service & Spare-part Support: In-house spare-parts warehouse for fast lead-time. Send us your project parameters: conveying method, hourly throughput, horizontal distance, vertical lifting height, elbow quantity, powder-material property, moisture content, site altitude & ambient temperature, and we will deliver custom-tailored blower proposal for you.

5. Contact Information

For full PDF catalogue, performance datasheets and custom powder-pneumatic-conveying solution proposals, please feel free to reach us:

Reach us directly：
📞 WhatsApp / Wechat: +86 187 5316 3090
📧 Email: [email protected]
📞 Phone / WhatsApp: +86 187 6611 7068
📧 Email: [email protected] | [email protected]
🌐 Official Website: https://www.mtrootsblower.com

💡 Recommended information for model-selection submission: Conveying mode (positive-pressure / negative-pressure), hourly conveying capacity, horizontal distance, vertical lifting height, elbow count, powder-material name, moisture content, abrasiveness, site altitude, ambient temperature. Accurate inputs help avoid pipe-blockage and insufficient-air-volume risks.