Roots Blowers
Oil-free Roots blowers built for continuous aeration duty — low pulsation, low noise, long service life.
ZXMSR series Roots blowers for aquaculture
Zhongxin ZXMSR-series roots blowers are positive-displacement machines purpose-built for bottom aeration in aquaculture — feeding microporous tubing and aeration discs in shrimp ponds, fish ponds and RAS tanks. The ZXMSR series covers 11 sizes (ZXMSR-40 to ZXMSR-300) with air flows from 0.4 to 136+ m³/min and pressures up to 98 kPa, so there is a model for every pond size from a 1-mu nursery to a 50+ mu production farm.
Model range & performance
| Model (bore) | Air flow range (m³/min) | Required power (kW) | Typical pond use |
|---|---|---|---|
| ZXMSR-40 | 0.4–1.3 | 0.3–1.3 | Nursery / small tanks |
| ZXMSR-50 | 1.0–3.8 | 0.1–3.8 | 1–3 mu ponds |
| ZXMSR-65 | 1.3–5.4 | 0.4–5.4 | 3–5 mu ponds |
| ZXMSR-80 | 2.5–8.2 | 1.0–8.2 | 5–8 mu ponds |
| ZXMSR-100 | 3.5–13.6 | 1.4–13.6 | 8–15 mu ponds |
| ZXMSR-125 | 5.3–18.7 | 1.7–18.7 | 15–25 mu ponds |
| ZXMSR-150 | 10–37 | 3.8–37 | 25–40 mu ponds |
| ZXMSR-175 | 20–51 | 7.2–51 | 40–60 mu ponds |
| ZXMSR-200D | 19–42+ | 10–47+ | Large farms / multiple ponds |
| ZXMSR-250 / ZXMSR-300 | up to 136+ | up to 280 | Industrial / large water bodies |
Sizing notes
Pressure range: 9.8–58.8 kPa standard (higher-pressure models to 98 kPa available). 1 mu ≈ 667 m²; pond-size mapping is a guideline — final selection by air demand and depth.
Sizing rule of thumb: 1 kW of motor supports roughly 100–150 m of microporous tubing; air demand ≈ tubing length × 0.1–0.4 m³/h per metre; pressure = water depth + 15–20% headroom.
Seven key features — why Zhongxin blowers
- Low noise — spiral intake/exhaust structure opens and closes gradually instead of snapping, eliminating pulsation noise; advanced sound-absorbing silencers included.
- Vibration-free running — rotors machined on precision machining centers with uniform mesh clearance, then dynamically balanced.
- High efficiency, low energy — advanced composite rotor profile seals better and leaks less, raising volumetric efficiency.
- Long service life — gears made of 20CrMnTi, carburized and ground to Grade 5 precision; dual-row imported bearings.
- Clean oil-free output — special sealing design keeps oil out of the casing: the air delivered contains no oil.
- Standardized production — full interchangeability of parts; high quality at lower cost.
- Easy selection — dense model range and performance points make matching simple and cost-effective.
Blower (ZXMSR) → main pipe → manifold with valves → branch pipes → microporous tubing / discs
System matching
- Lay tubing lines 3–5 m apart, 10–20 cm above the pond bottom.
- Size the main pipe so friction stays under ~10% of total pressure.
- Add an isolation valve per branch so ponds/lines can be serviced without stopping the blower.
- Keep a spare blower or emergency aerator — a 2-hour outage on a hot night can crash dissolved oxygen below lethal levels.
Applications
- Shrimp and fish pond bottom aeration (microporous tubing & discs)
- RAS and hatchery aeration
- Live-fish transport tanks
- Wastewater aeration basins
- Pneumatic conveying / industrial duty
Frequently asked questions
Roots blower vs regenerative blower — which for ponds?
Roots blowers (positive displacement) hold pressure when lines are partially blocked and feed multiple lines from one manifold — the correct choice for aquaculture bottom aeration. Regenerative blowers suit small shallow tanks.
How much air do I need for my pond?
Calculate from tubing: air demand = tubing length × 0.1–0.4 m³/h per metre. Example: 150 m of tubing at 0.2 m³/h·m = 30 m³/h (0.5 m³/min) FAD.
What pressure does a 3 m deep pond need?
About 0.35–0.45 bar: water depth 0.3 bar + pipe friction + 15–20% headroom. Check the blower’s pressure–flow curve at your required flow.
Is the output air oil-free?
Yes — the special sealing design prevents oil from entering the casing, so output air is oil-free (important for aquatic life).
What maintenance is needed?
Check oil level monthly, change oil per the manual schedule, and keep the intake filter clean. A maintained roots blower runs reliably for many seasons.
Can one blower feed several ponds?
Yes, with a correctly sized manifold and isolation valves per pond. Size the blower for total air flow and the deepest pond’s pressure.
Ordering & system packages
ZXMSR blowers are supplied as single units or complete aeration packages (blower + main/branch pipes + microporous tubing or discs + manifold) with layout drawings. Motors: 4-pole standard (other pole counts per speed selection). OEM/ODM welcome — send your pond area, depth and stocking density for a full system quote.
Ask about Roots Blowers
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