MultiStar Cold – Your Source for Bus Air Conditioner Parts
The U4854 (Aquavent 5000S) is a high-performance 24V circulation pump designed for bus heating and thermal management systems. As the sealless magnetic coupling variant of the Aquavent 5000 series, it offers watertight operation throughout its entire lifetime with no mechanical seal to wear out, making it ideal for demanding passenger transport applications
Multistar Cold is your one-stop supplier for bus AC parts and transport refrigeration parts – original new and China-made options at competitive prices.
Premium Sealless Magnetic Coupling Pump – One-Stop Bus AC & Transport Refrigeration Parts Supplier
Spheros / Valeo:
11143781A, 11143781B, 11143781C, 11143781D, 11143781E, 11143781F
11143782A, 11143782B, 11143782C, 11143782D, 11143782E, 11143782F
1301681A, 1302710A, 1303293A
9810182A, 9810182B, 9810179B
Webasto:
9810179A1, 9810179B
EvoBus (Mercedes-Benz):
0028354764, A0028354764, 0028354664, A0028354664
Other References:
1200004228, 2820004070, 5801394822
✨ Key Features & Benefits
- Sealless Magnetic Coupling – Watertight throughout entire lifetime, no mechanical seal to wear out; no steam leakage
- Extended Service Life – Improved motor efficiency for longer working lifetime
- Soft Start – Motor ramps up to nominal speed within 5 seconds for material-friendly operation
- Dry-Running Protection – Automatically shuts off after 45 minutes of dry operation; reactivates after power disconnect
- Blocking & Overload Protection – Protects motor from impeller blockage and hydraulic overpressure
- Sleep Mode – Internal electronics switch off when not in use for energy conservation
- Maintenance-Free – No service required throughout operational life
📊 Technical Specifications
Available Variants
| Advantage | Benefit |
|---|---|
| Factory Direct | No middlemen – competitive pricing |
| Quality Focus | OEM-grade materials and testing standards |
| Fast Delivery | Ready stock and quick production turnaround |
| Technical Support | Expert assistance for fitment verification |
| Global Reach | Shipping to 50+ countries worldwide |
| Flexible MOQ | Low minimum order quantities |
Multistar Cold – Your one-stop supplier for bus AC parts, transport refrigeration parts, Thermo King parts, and Carrier Transicold parts. OEM-grade quality, competitive pricing, and global shipping from China.