Water Management .

Boneng K- and HB-series gear motors with brake and position feedback drive sluice, radial and regulating gates at hydraulic structures. Stroke positioning accuracy of 0.5–1 mm is delivered by the high reduction ratio (i = 80–200) and a built-in multi-turn encoder. Drive redundancy with a pair of gearboxes on a common shaft is the standard layout for critical gates.

• Reduction ratio 80–200
• Built-in electromagnetic brake that engages on loss of power
• Multi-turn absolute encoder for position monitoring
• IP66 protection, design rated for submerged installation

Low-speed Boneng gear motors rated for S1 continuous duty drive surface aerators in biological treatment lines. The low rotor speed (30–60 rpm) and high output torque are produced by a 3- or 4-stage gear train. The cast-iron housing with epoxy coating withstands the corrosive environment (biogas, hydrogen sulphide).

• Output speed 30–60 rpm
• Service factor of at least 1.5 for S1 continuous duty
• Anti-corrosive epoxy coating on the housing
• Reinforced bearings to take the vertical rotor load

An ultra-low-speed drive (1–4 rpm) with a high reduction ratio (i = 1,500–6,000). Used on biofilters with partially submerged biodiscs, where 24/7 duty without stoppages and low vibration are required. Boneng R- and HB-series gearboxes paired with a small-power motor of 1.5–7.5 kW.

• Output speed 1–4 rpm
• Reduction ratio i = 1,500–6,000
• S1 continuous duty, service life of at least 80,000 h
• Low vibration (the biodisc is partially submerged in water)

KINGDA's flagship offering — horizontal centrifugal slurry pumps in the KSM (mid-duty) and KSL (heavy-duty) series with wear-resistant wet ends in high-chrome A05/A49 iron. They handle slurry with up to 60% solids and abrasive content up to 800 mg/l at mineral processing plants, wastewater treatment plants and closed-loop water systems of metallurgy and mining-and-processing operations. Shaft power 75–450 kW, capacity up to 3,000 m³/h.

• Wear-resistant wet-end materials (A05, A49, rubber)
• Shaft power 75–450 kW
• Capacity up to 3,000 m³/h, head up to 100 m
• Spare-parts kit of replaceable liners and impellers
• Layout with bearing assembly and gland or mechanical seal

Decanter centrifuges for treatment-plant sludge dewatering run at a rotor speed of 2,500–4,000 rpm and need an accurate differential drive (main plus differential gearbox). Screw conveyors for dewatered sludge are equipped with standard Boneng K-series gear motors fitted with a brake and a Tianiu backstop to prevent reverse rotation on stop.

• Main drive: HV motor plus belt transmission
• Centrifuge differential gearbox (planetary, with built-in torque sensor)
• Screw conveyor: K-series gearbox plus Tianiu backstop
• Overload protection in case of screw jam

Wolong YHTM, WD3000 — high-voltage induction motors 6/10 kV rated 800–6,000 kW for trunk and booster water-supply pumping stations. S1 continuous duty, up to 20 starts per day, nominal efficiency above 96%. Capacity is controlled by a guide vane on the pump or by an HV variable-frequency drive (the discharge-side option delivers up to 30% energy savings).

• Rated 800–6,000 kW, 6/10 kV
• S1 continuous duty, service life 80,000 h
• Bearings with lifetime grease or a forced lubrication system
• Insulated non-drive-end bearing when operated from an HV inverter
• IP55 protection, IC411 / IC81W cooling

Sewage pumping stations with 15–355 kW submersible pumps run fully submerged and must come in IP68 hermetic execution with a double mechanical seal and an oil-filled chamber. Wolong supplies dedicated submersible series with stator-winding thermal protection, chamber moisture sensing and compatibility with frequent starting (up to 20 per hour) driven by level fluctuations in the wet well.

• IP68 hermetic seal, immersion depth up to 20 m
• Double mechanical seal with an oil-filled interstitial chamber
• Winding thermal protection (Pt100 / PTC)
• Moisture sensor in the interstitial chamber
• Compatibility with S4 duty (up to 20 starts per hour)

Treatment-plant aeration (75–500 kW) runs in S1 continuous duty around the clock. Multi-stage centrifugal blowers and turbo rotary compressors are typical. The motor operates from an inverter that trims air flow against the dissolved-oxygen reading in the aeration basin. Wolong WD3000 and Huali YE3 / YBX3 are suitable depending on the power rating.

• Class F insulation with class B thermal margin
• Inverter-compatible insulation (NEMA MG1 Part 31)
• Low noise (< 85 dB at 1 m)
• Bearing protection against shaft currents on VFD operation

Huali YE3, YBX3, YE4 — general-purpose induction motors 0.75–315 kW in IE3/IE4 efficiency classes for auxiliary drives at treatment plants and pumping stations: dosing pumps, reagent mixers, sludge scraper drives, screw screens and gate drives on secondary flows.

• IE3 / IE4 efficiency class
• IP55 protection, class F insulation
• VFD-compatible for variable-speed operation
• C3 / C4 anti-corrosive housing coating for wet rooms

Huawu YPZ2 / YWZ5 — electro-hydraulic disc brakes in a duplex layout on the gate-hoisting winch. The service brake holds the gate at an intermediate position during normal operation; the emergency brake (spring-applied, fail-safe type) engages on loss of power or a protection trip within 0.1–0.2 s — critical to prevent free fall of the gate, which would damage seals and the sill. Used on large hydroelectric and water-intake structures.

• Duplex set of brakes: service plus emergency
• Braking torque margin 1.75–2.0 over the rated hoist torque
• Engagement time on power loss ≤ 0.2 s
• IP65 protection, ambient −25 to +50 °C
• Backup power from a UPS or battery bank

TKT/TKK shoe brakes with an electro-hydraulic thruster are mounted on the low-speed shaft of lock-gate and regulating-gate drives. They hold the load on loss of power and engage smoothly without shock-loading the driveline. Manual release is provided for maintenance and emergency evacuation.

• Electro-hydraulic thruster Ed-50 to Ed-301
• Manual release feature
• Limit switch for lining-wear monitoring
• Anti-corrosive execution for wet rooms

Tianiu NJ/NJZ overrunning clutches (backstops) are mounted on the low-speed shaft of treatment-plant dewatered-sludge conveyor drives. They prevent belt reversal under the weight of the load when the drive stops or trips. No external power is required — engagement is purely mechanical and triggered by a change in rotation direction.

• Holding torque margin 1.5 over rated torque
• Lubrication-free sprag/ratchet mechanism
• IP55 protection, oil-filled housing
• GOST certification for use on hydraulic structures

Emergency brakes for sludge scraper drives at primary and secondary clarifiers and for screw screens at mechanical pretreatment. They protect the gearbox and scraper from damage on a jam against a large object, engaging on a torque-sensor signal or motor-overcurrent trip.

• Braking torque 1.5–2.0 times the rated drive torque
• Engagement time ≤ 0.3 s
• Compatibility with the treatment-plant PLC system
• Anti-corrosive coating for humid atmosphere

Jiaohua YOX/COX fluid couplings deliver soft starts on trunk water mains and on slurry pumps in industrial closed-loop water systems. The 2–3% slip at rated operation protects the motor from overload if the impeller jams (for instance, a large object entering a slurry-pump wet end). Versions with a fusible plug release the oil externally on overheating.

• Rated slip 2–4%
• Fusible plug rated 145–160 °C
• Oil fill of 70–85% of internal volume
• HV-motor flange compatibility

Donly — high-pressure hydraulic power units (16–32 MPa) for actuating hoist cylinders of large hydraulic gates at hydroelectric plants, reservoirs and water-intake structures. Scope of supply: a main and a standby pumping skid, pneumo-hydraulic accumulators for emergency gate closure on power failure, fine-mesh filters, an oil cooler and a PLC control cabinet. The redundant layout keeps the unit running even if one of the skids fails.

• Operating pressure 16–32 MPa
• Redundant pumping skids (main plus standby)
• Pneumo-hydraulic accumulators for emergency gate closure
• PLC control cabinet with a SCADA interface
• Compliance with hydraulic-structure requirements

Huade — a Chinese Bosch Rexroth licensee: proportional and servo valves, A4VSO/A11VO axial-piston pumps and custom-built cylinders for hydraulic-structure duty. They are used inside Donly power units and in standalone drives of regulating gates. INI Hydraulic supplies complete medium-pressure power units and components, gear pumps and high-pressure hoses.

• Proportional valves with position feedback
• Variable-displacement axial-piston pumps
• Cylinders with an anti-corrosive rod (chromium or ceramic)
• Compatibility with HFC / HFDU fluids for fire safety

Jiaohua YOXp / Yongjing LX — pin-type flexible couplings with elastic bushings between motor and pump. They damp shock loads on start-up, take up small radial misalignments after thermal growth and simplify pump disassembly for service without removing the motor.

• Torque 0.5–25 kN·m
• Radial misalignment compensation 0.2–0.8 mm
• Service life of the elastic elements at least 30,000 h
• Easy bushing replacement without pulling the hubs off the shafts