1. Horizontal Split Casing (Volute Body + Cover)
Split along horizontal centerline, locked by bolts; suction & discharge nozzles arranged on lower half casing. Overhaul only requires removing upper cover without pipeline or motor disassembly. Ports for pressure gauge, vacuum gauge and drain plug are reserved on flanges.
2. Symmetrical Double-Suction Impeller (Core Component)
Integrated back-to-back double-channel impeller with symmetric bilateral inlet, balancing most axial thrust naturally. Impeller outer diameter can be trimmed (suffix A/B) to match different head requirements.
3. Replaceable Double Suction Wear Rings
Installed on both sides of impeller to block high-pressure liquid backflow, improve pump efficiency and reduce maintenance cost via separate replacement.
4. Main Shaft & Shaft Sleeve
High-strength quenched & tempered alloy steel main shaft; detachable sleeve protects shaft from medium erosion and packing abrasion.
5. Shaft Seal System (Two Options)
- Standard: Packing seal with water seal ring, external flushing water for cooling, lubrication and air isolation.
- Optional: Cartridge mechanical seal for zero leakage, suitable for clean constant-temperature medium.
6. Dual Independent Bearing Housings
Supports rotor from both ends to bear residual axial & radial force; grease or oil lubrication optional, low vibration, low noise and long bearing service life.
7. Common Base Frame & Flexible Coupling
Pump and motor share one cast iron base for good coaxiality; flexible coupling absorbs vibration to protect pump & motor shaft.
Motor drives main shaft and symmetrical double-suction impeller to rotate at high speed:
1. Liquid flows into both symmetrical suction ports of volute simultaneously; double-side inlet greatly increases intake area with superior anti-cavitation performance.
2. Liquid is accelerated and pressurized by centrifugal force inside impeller channels, then converges in the middle and discharges outward into volute chamber.
3. Gradually expanding volute converts liquid kinetic energy into static pressure energy, and pressurized fluid exits from bottom discharge nozzle.
4. Axial forces generated by bilateral inflow counteract each other, eliminating nearly all axial rotor movement and minimizing bearing load for stable long-term operation.
1. Ultra-Large Flow Capacity
Under same impeller outer diameter, flow rate doubles compared with single-suction pumps; large bore models reach thousands m³/h, ideal for large-scale water supply and circulation systems.
2. Self-Balanced Axial Force, Ultra-Stable Operation
Symmetrical dual-channel inlet offsets axial thrust, drastically reducing bearing wear, vibration and noise; supports 24-hour non-stop continuous operation.
3. Split-Casing Fast Maintenance
Only remove upper pump cover to extract impeller and seal assembly, no pipeline or motor disconnection required, cutting maintenance downtime significantly.
4. High Hydraulic Efficiency & Energy Saving
Optimized dual-channel hydraulic profile delivers pump efficiency 85%~92%, much lower power consumption than ordinary single-suction pumps under high-flow working conditions.
5. Excellent Anti-Cavitation Performance
Large bilateral inlet cross-section reduces inflow velocity and vacuum bubble generation, perfect for low-water-level raw water intake stations.
6. Diverse Material Options
Cast iron, cast steel, SS304/SS316 available to handle clean water, hot water, seawater and weak corrosive chemical liquid.
1. Only suitable for clean medium with tiny impurities; no wide anti-clog channel, forbidden for fiber, sand, ore slurry transportation.
2. Larger overall size & footprint than vertical inline single-suction pumps with equal flow capacity.
3. Poor performance under ultra-high head; optimal working range: medium-low head & ultra-large flow.
4. Higher initial procurement cost than standard single-suction clean water pumps.
- Flow Rate: 300 ~ 12000 m³/h
- Head: 8 ~ 160 m
- Medium Temperature: Standard cast iron ≤80℃; customized hot water ≤120℃; stainless steel -20~100℃
- Allowable Impurities: Trace fine sediment, particle size ＜0.2mm, no fiber or soft debris
- Applicable pH: Cast iron 6~9; SS304 3~10; SS316 1~12
- Matched Motor Power: 30 ~ 1600 kW
1. Municipal Water Plants: Raw water intake, clean water delivery, pipeline booster pump station.
2. Thermal Power Plants: Circulating cooling water, boiler makeup water, unit circulation supply.
3. Water Conservancy & Agriculture: Large irrigation district water supply, river flood drainage, reservoir water transfer.
4. Large HVAC & Data Center: District heating, central air conditioning circulation, server room cooling system.
5. Industrial Parks: Chemical cooling circulation water, steel mill clean circulating water, seawater desalination intake.
6. Large Fire Protection System: Main fire water supply pump for industrial park, power plant and warehouse.
2. Cast iron S/SH model for normal-temperature clean water & farm irrigation; SS304/SS316 stainless steel for seawater & weak acid medium.
3. Special hot water seal & oil-lubricated bearing model mandatory if medium temperature over 80℃.
4. Reserve 10% margin for flow & head, large bore pipeline brings higher friction loss.
5. Strictly forbidden for media containing sand, fiber, sludge or ore slurry; replace with slurry pump / non-clog pump instead.
6. Equip YB flameproof motor for flammable & explosive chemical environments; install rain-proof base for outdoor pump house.
1. Fully prime clean water to exhaust air before startup; dry running is strictly prohibited, which will burn packing/mechanical seal and scratch impeller instantly.
2. Supply continuous low-pressure flushing water for packing seal units to prevent air intake & cavitation; inspect mechanical seal leakage regularly.
3. Refill bearing grease every 500 running hours for grease-lubricated type; replace lubricant every 2000 hours for oil-lubricated bearings.
4. Open upper cover periodically to inspect wear of impeller & wear rings; replace worn parts immediately if clearance exceeds standard to avoid efficiency drop.
5. Record inlet/outlet pressure, motor current and vibration noise per shift; clean inlet strainer if severe pressure fluctuation occurs.
6. Fully drain medium inside pump for long-term shutdown, flush flow channel with clean water, coat anti-rust grease on shaft sleeve & impeller; drain all residual water in winter to prevent casing cracking.
