The Howo rear dual-axle dry powder & foam combined fire truck is manufactured using a Howo heavy-duty truck chassis (4x2) produced by China National Heavy Duty Truck Group Co., Ltd. (SINOTRUK), with chassis model: ZZ5357TXFV464MF5. It features an original four-door, double-row cab with factory-installed air conditioning. The original instrument panel is equipped with a fire-fighting operation panel and a siren control box. Four self-contained breathing apparatus (SCBA) dedicated backrests and fixing clamps are installed on the rear seat backrest, ensuring safe and comfortable seating. The cab is tiltable, making maintenance of the engine and related components more convenient. The upper body includes the pump house, water tank, equipment compartments, foam tank, and dry powder tank. The total vehicle fluid capacity is 5500L of water, 3000L of foam, and 3000L of dry powder. The water tank uses high-quality Q235 carbon steel, the foam tank uses 304 stainless steel, and the dry powder tank uses Q345R material. It is equipped with a CB10/60 low-pressure fire pump (optional medium/low pressure pump), PL8/48 dual-purpose fire monitor, and PF30 dry powder monitor. This truck is widely used in large and medium-sized city fire departments, petrochemical plants, industrial and mining enterprises, ports, and docks, capable of extinguishing large-scale oil fires and general material fires.
Chassis Model: SINOTRUK / ZZ5357TXFV464MF5
Engine Manufacturer: China National Heavy Duty Truck Group Co., Ltd.
Engine Model: MC11.46-61
Engine Power: 341kW
Drive Type: Rear-wheel drive
Wheelbase: 4600+1400mm
Emission Standard: GB3847-2005, GB17691-2018 China VI
Cab Structure: Flat front, original double-row, four-door cab.
Seating Capacity: 2 seats in the front row, 4 seats in the rear row.
Armrests and guardrails are added in front of the seats. Firefighters can quickly put on SCBA while en route to the fire scene, allowing rapid deployment upon arrival.
Tiltable Structure: Hydraulic tilt mechanism for safer and more efficient tilting.
Cab Interior Equipment: In addition to original equipment, includes power take-off (PTO) control switch, 100W siren, siren light switch, etc.
Exterior of the cab: A long-row warning light, specifically designed for fire trucks, is installed on the front of the cab roof.
Total Listed Volume: Total tank volume 11 cubic meters.
Capacity: Total tank volume 11.000 m³. Water tank volume: 6.000 m³ (Dimensions: 1640×2500×1530mm). Foam tank volume: 3.000 m³ (Dimensions: 820×2500×1530mm). Dry powder tank volume: 2.000 m³ (Dimensions (Dia×H): 1500×1420mm).
Material: Water tank: High-quality carbon steel plate, treated with advanced anti-corrosion process. Foam tank: High-quality 304 stainless steel plate.
Structure: Frame-welded. Longitudinal and transverse anti-slosh baffles are installed inside the tanks to reduce liquid impact during vehicle movement, enhancing safety. The front and rear tank walls have梯形 stiffening ribs for increased durability.
Rapid-opening manholes on top for easy maintenance access. Devices to prevent pump suction vortex and strainers are installed inside the tanks.
Stainless steel float-type liquid level indicators are installed, showing remaining fire extinguishing agent capacity on the dashboard. A ball valve drain port is at the bottom of each tank.
Two 76mm overflow pipes. Two 76mm filling inlets on each side of the body for easy water/foam supply from other vehicles.
Equipment: 2 manholes with quick-lock opening mechanisms. 2 liquid level indicators. 2 drain ports with stainless steel ball valves. 4 water filling inlets (two on each side).
Process: Welding is firm and reliable; slag, cold lap, and other defects are removed. The tank undergoes a 24-hour hydrostatic pressure test to ensure no leakage.
Fire Pump: CB10/60 (Optional 80-type fire pump from Shanghai Rongshen).
Flow Rate: 60 L/s (or optional 80 L/s).
Pressure: 1.0 MPa.
Mounting Type: Rear-mounted.
Vacuum Pump: Piston type.
Vacuum Pump Material: Wear-resistant, corrosion-resistant to meet sealing requirements.
Priming Time: ≤35s, Suction Depth ≥7m.
Maximum Vacuum Degree: ≥85kPa.
Piping System:
· Suction Line: One Φ150mm inlet for drawing water from natural sources, onboard tanks, or fire reservoirs. A reducing adapter can be connected for hydrant supply. Suction hose is placed on the roof. One Φ150mm inlet with butterfly valve connects to the water tank.
· Discharge Line: One Φ100mm roof-mounted line with control valve for the fire monitor (using flexible coupling). One Φ80mm and one Φ65mm manually controlled ball valve discharge outlet on left and right sides of the pump house.
· Tank Filling Line: One Φ65mm line with control valve inside pump house for pumping water into the tanks. Two Φ65mm filling inlets on each side of the body (using internal screw-type couplings with caps).
· Drain Line: Drain lines with ball valves are added to protect the pump and various ball valves.
· Cooling Water Line: A cooling water line with control valve connected to the inlet/outlet lines is provided for the PTO to handle various working conditions.
Model: PL8/48 (Weisite)
Flow Rate: 48 L/s
Range: Water ≥60m, Foam ≥55m
Pressure: 1.0 MPa
Location: On top of the water tank.
Control: Manual control with locking mechanism for easy operation.
Type: Full-power, sandwiched PTO.
Cooling Method: Forced water cooling.
Lubrication Method: Splash lubrication.
Operation: Engaged via control on the dashboard inside the cab; smooth and quiet engagement.
Installation: The PTO matches the engine well, installed precisely, and does not disengage on its own after engagement.
Main Materials: Frame and skin are high-quality carbon steel plates; internal equipment racks are aluminum alloy; interior panels are oxidation-treated aluminum plates.
Basic Structure:
· Vehicle structure: Front section is the equipment compartment with aluminum roll-up doors, middle section contains the fire tanks, rear section is the pump house.
· Rear pump house includes instrument panel and vehicle control system. Equipment compartments and pump room have lockable aluminum roll-up doors. Frame-welded structure ensuring strength and rigidity.
· Internal space is adjustable; equipment compartments have drainage holes.
· Reliable, aesthetically pleasing, and adjustable compartments with large curtain-style doors for maximum space utilization.
· Night lighting is installed in the body and pump house for convenient night operation.
Roll-up Doors (Aluminum Alloy):
· All equipment compartments and pump room use lockable aluminum alloy roll-up doors. Handles and locks are durable, non-deforming. Sealing is watertight (tested by water spray).
· Rivets inside the guide rails prevent detachment.
· Interior lighting in each compartment controlled by the roll-up door opening/closing.
· One aluminum roll-up door on the left and right rear, and one at the very rear – safe, reliable, aesthetically pleasing, and practical.
Basic Design Principles:
· Equipment integration designed based on combat formation and deployment scenarios.
· Equipment racks designed according to ergonomic principles.
· Principle of accessing any equipment from within a compartment without needing climbing tools, simply and intuitively.
· Equipment placement based on logical usage relationships and frequency.
· Any equipment can be accessed within 1-2 actions while standing on the ground or footplate.
Foam Tank Volume: 3.000 m³
Foam Tank Dimensions: 820×2500×1530mm
Foam Proportioning System: Automatic B-class foam proportioning system.
Operating Principle: The controller stabilizes the pump discharge water pressure by controlling the vehicle chassis throttle based on a preset discharge pressure value. By acquiring water flow, foam flow, and electronically controlled regulating valve information, and based on the preset foam proportion, it performs complex control logic calculations to control the opening of the electronic regulating valve, ensuring the foam output reaches the specified value. It shares one control system with the vehicle's overall control system. The main screen displays pump inlet/outlet pressure, water level, foam liquid level, pump speed, outlet pressure set point, engine coolant temperature, oil pressure, water flow, foam flow, foam proportion, valve opening, and control mode.
Dry Powder Tank: Capacity: 3000 kg dry powder.
Working Pressure: Min 0.5 MPa, Max 1.4 MPa.
Design Pressure: 1.6 MPa.
Nitrogen Cylinders: Quantity: 9 units. Single cylinder capacity: 70L. Max working pressure: 15 MPa.
Dry Powder Monitor: Model: PF30. Rated discharge pressure: 1.4 MPa. Flow rate: 30 kg/s. Range: ≥35m.
Pressure Reducing Valve: Quantity: 1 unit. Working pressure: ≤1.4 MPa.
Safety Valve: Quantity: 1 unit. Opening pressure: 1.6 MPa.
Dry Powder Hose Reel (with Dry Powder Gun): Quantity: 1 set. Discharge rate: ≥2.5 kg/s. Range: ≥10m. Reel hose length: 40m.
· One red long fire truck specific siren light on top of the cab.
· Siren power: 100W.
· For safety, the vehicle's wiring uses manufactured wiring harnesses; all connectors are waterproof for circuit safety during use.
· One scene floodlight on the roof. Safety marker lights on both lower sides of the vehicle. Reflective markings affixed to the body and rear according to standards.
· LED lighting installed in all equipment compartments for night operations.
· Four strobe lights and two side floodlights on each upper side of the vehicle. Safety marker lights and side retro-reflectors (combined) on the lower sides. Front and rear clearance lights. One turn signal on each side. Lighting in crew cab, compartments, and pump house.
· Siren, warning lights, strobes – independent auxiliary circuits; controls installed in the cab for driver convenience.
· All circuits are protected by conduits, using different wire colors to distinguish connections and functions.
· Pump house instrument panel includes: Liquid level gauges, pressure gauge, vacuum gauge, tachometer, compartment light switches, etc.
Instrument Panel & On-Board Equipment
· Instrument panel located in the pump room at the rear, with a control panel and adequate lighting.
· All control handles, switches, indicator lights have Chinese labels adjacent to them.
· Includes operating step instructions.
· All nameplates are durable and highly adhesive, resistant to effects caused by temperature and climate changes.
· The control panel uses high-quality aluminum plate – aesthetically pleasing, durable, lightweight.
· Pump operating system located at the rear; no pressure outlet at this panel, ensuring operator safety; includes panel lighting.
· Vehicle performance complies with GB7956 "Performance requirements and test methods for fire fighting vehicles".
· Vehicle exterior maintains a certain level of flatness, complying with relevant regulations.
· All riveting maintains a certain density, complying with enterprise standards.
· All welding is firm, smooth, and flat, complying with enterprise standards.
· All control switches, instruments, equipment racks, and the vehicle have standard-compliant nameplates/labels.