Heavy Leading Company Limited is one of the most reliable manufacturers and suppliers of sewage suction truck 20 cbm in China. If you're going to wholesale bulk durable sewage suction truck 20 cbm made in China, welcome to get quotation from our factory. All customized products are with high quality and low price.
Products Specifications
| Category | Key Specifications | Standard Specifications and Parameters |
| Vehicle Chassis | Chassis Model | HOWO 7 Series Heavy-Duty Special Vehicle Chassis (e.g., ZZ1257) |
| Drive Type | 6×4 (Dual rear-axle drive, 10 wheels) | |
| Cab | HW76 Luxury Cab (with single sleeper, A/C, and radio) | |
| Wheelbase | 4300+1350 mm or 4600+1350 mm | |
| Powertrain | Engine Model | Sinotruk WD615.47 (or Weichai WP10 Series) |
| Max. Power/Horsepower | 371 HP / 273 kW | |
| Emission Standard | Euro 2 or Euro 3 | |
| Transmission | Sinotruk HW19710 (10 forward gears, 2 reverse gears) | |
| Steering System | Imported or high-quality domestic hydraulic power steering | |
| Axles and Tires | Front Axle | HF9 Steering Axle (9-ton load capacity) |
| Rear Axle | HC16 Double-reduction Drive Axle (16 tons × 2, with inter-wheel/inter-axle differential locks) | |
| Tire Specifications | 12.00R20 Steel-belted Radial Tires (10 + 1 spare) | |
| Specialized Superstructure (Sewage Suction) | Tank Capacity | 20,000 Liters (20 m³ / 20 CBM) |
| Tank Material | 5mm–6mm High-strength Premium Carbon Steel (Q235 or Q345) | |
| Vacuum Pump Type | Water-ring Vacuum Pump or Rotary Vane Vacuum Pump (e.g., High-power Weilong pump / Imported Jurop pump) | |
| Vertical Suction Lift / Filling Time | Vertical Suction Lift ≥ 6–8 m / Filling Time ≤ 5–8 min | |
| Vacuum Level | 93% (approx. -0.093 MPa) | |
| Tailgate Opening Method | Full-opening rear tailgate; hydraulic cylinders for automatic locking/opening | |
| Discharge/Emptying Method | Dual-cylinder hydraulic tipping/dumping + Pressure-assisted discharge | |
| Safety and Assistance Systems | Safety Protection Devices | Anti-overflow valve, water-air separator, oil-air separator, sludge sight window/tube, pressure gauge |
| On-board Accessories | 8m high-quality rigid rubber suction hose, night-operation work light, rear protective guardrail |
product key technologies
Hydraulic System: Core Control and Power Components
Primarily responsible for controlling the opening of the rear tailgate, as well as assisting with the lifting and locking of the tank.
Features
Independent Modular Design: Utilizes inclined single-acting/double-acting hydraulic cylinders paired with an external, compact, independent hydraulic pump station.
External High-Pressure Piping: High-pressure braided hydraulic hoses are routed closely alongside the cylinders, ensuring a compact structure.
Advantages
Stable Operation & High Force: Hydraulic actuation offers smoother operation than mechanical locking, easily lifting or locking the heavy tailgate.
Tight Sealing & Leak-Proof: Strong hydraulic locking force ensures the tailgate gasket remains tightly compressed-even with a full 20 m³ load-preventing water or air leaks.
Easy Maintenance & Operation: The independent pump station is easy to service; a sight glass allows for quick checks of hydraulic fluid levels.
High-Power Vacuum Suction Pump
Powered by the truck engine via a driveshaft and belts, the pump creates negative pressure in the tank for suction or positive pressure to accelerate discharge.
Features
Multi-Belt Drive: Uses multiple high-strength V-ribbed belts to drive the vacuum pump, providing robust power transmission.
Compact Undermount Layout: Installed within the protective guardrail section of the chassis frame, saving space around the tank.
Flanged Rigid Pipe Connection: Inlet and outlet ports use heavy-duty metal elbows secured with bolted flanges for a robust, airtight seal.
Advantages
Belt Slip Protects the Engine: If the pump jams, the belts slip (acting as a buffer) rather than forcing a stall that could damage the driveshaft or transmission.
Strong Suction & Stable Performance: Multiple belts ensure efficient power transmission with minimal loss, providing sufficient power even for deep-suction tasks.
Easy Inspection & Low-Cost Repair: Simple structure allows for quick checks of belt tension, and belt replacement is inexpensive.
Multi-way Hydraulic Control Valve Assembly and Auxiliary Oil Tank System (including a dual-spool manual multi-way valve and reservoir)
The "command center" for the vehicle's hydraulic operations; it distributes high-pressure hydraulic fluid to various components. Manual levers control the opening/closing of the tank's rear gate and the lifting/dumping of the tank body.
Features
Dual-spool manual design: Features two independently operated levers and ports at the top with vertical hose routing, allowing for simultaneous or separate control of two functions (e.g., rear gate operation and tank lifting).
Integrated auxiliary tank: The valve assembly is mounted on a bracket directly above a large-capacity steel reservoir, resulting in a compact design and short return-oil lines.
Industrial-grade hoses: All connections utilize high-pressure resistant, double-steel-wire braided hoses with abrasion-resistant protective sleeves for durability.
Advantages
Centralized, intuitive control: All hydraulic operations are consolidated in one location; the operator can manage everything while standing beside the vehicle-eliminating the need to move back and forth-which enhances safety.
Smooth, precise, and controllable movement: The manual valve offers excellent linearity; the extent of lever movement allows for precise flow control, ensuring stable lifting and lowering of the tank and rear gate without sudden jerks or impacts.
Efficient heat dissipation and long service life: The large reservoir provides ample oil volume and a large surface area for heat dissipation, ensuring rapid cooling during circulation and preventing seal aging caused by excessive oil temperatures.
Diesel Pre-filter (with fuel-water separator, Model PL420)
Filters out large particulate impurities and separates water from the diesel fuel, preventing contaminants from entering the engine and causing wear or corrosion.
Features
Standard model: Uses the widely adopted PL420 spin-on filter common in heavy-duty trucks.
Integrated water collection bowl: Equipped with a transparent collection bowl and drain valve at the bottom, making sediment clearly visible.
Chassis-mounted: Installed on the side of the frame rail, close to the engine fuel lines, for a compact layout.
Advantages
Engine protection: Effectively extends the service life of the high-pressure fuel pump and injectors while reducing fuel system malfunctions.
Easy inspection: Drivers can visually determine if draining is required, saving time on maintenance.
Readily available parts: Uses a globally standardized model, ensuring very low costs for overseas after-sales service and replacement.
Applications
The 20 CBM sewage suction truck is primarily used for high-volume, high-density waste suction and transport in the following scenarios:
1. Municipal Sanitation
Sewer desilting: Suctioning sludge, sand, gravel, and debris from underground municipal pipelines.
Septic tank cleaning: Regularly emptying large-capacity septic tanks at residential complexes, schools, hospitals, and other public facilities.
Culvert and floodwater drainage: Removing sediment from storm drains and performing emergency suction and drainage of floodwater from underground garages.
2. Industrial and Construction Sites
Sludge handling: Suctioning thick sludge from the bottom of sedimentation tanks at chemical plants, paper mills, and textile printing/dyeing facilities.
Construction site slurry recovery: Rapidly suctioning and transporting waste slurry at construction sites involving piling or bridge foundation work.
Oil-water separator cleaning: Removing heavy oil sludge and residue from separators at oil refineries and large vehicle maintenance facilities.
3. Agriculture and Specialized Sites
Livestock farm waste removal: Centralized suction and transport of manure and biogas residue from large-scale pig and cattle farms.
Port and vessel hold cleaning: Suctioning ballast water, oily wastewater, and oil sludge from ship holds at docks.
Shipment Display
Hot Tags: sewage suction truck 20 cbm, China sewage suction truck 20 cbm manufacturers, factory, HOWO 4x2 Cargo Truck, HOWO 6x4 Fuel Water Tanker Truck, HOWO 6x4 Truck Tractor Head, HOWO 6x6 Cargo Truck, HOWO NX Truck Tractor Head, platform cargo truck
