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Truck SOLENOID VALVE 3754110-X0100 201DX2SEC7-495294C2 3754010-57A/A 3754020-27V/B WLDSJ5001 WLDSJ4003 612640130152 Fit for DONGFENG

The Urea Pump Heating Solenoid Valve Assembly is a critical component in modern Selective Catalytic Reduction (SCR) aftertreatment systems used in diesel-powered commercial vehicles and heavy machinery. This valve is specifically designed to regulate the flow of heated engine coolant to the AdBlue® (DEF – Diesel Exhaust Fluid) pump module, preventing the urea solution from freezing in cold climates.

Since DEF freezes at approximately −11°C (12°F), maintaining system operability during winter operation is essential. The heating solenoid valve enables controlled circulation of hot coolant through the urea dosing system when ambient temperatures drop below safe thresholds. It is typically activated by the Engine Control Unit (ECU) based on temperature sensor inputs from the DEF tank and dosing module.
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  • 3754010-57A/A

  • Dongfeng

Attribute Specification
Product Name Urea Pump Heating Solenoid Valve Assembly
Alternative Names DEF Heater Control Valve, SCR Coolant Control Valve, AdBlue Heating Solenoid
Function Controls hot coolant flow to urea dosing system to prevent freezing
Valve Type Normally Closed (NC), 2/2-way solenoid valve
Operation Mode Electrically actuated via ECU command
Body Material Brass, stainless steel, or high-strength engineering plastic (heat-resistant)
Seal Material FKM (Viton®) or EPDM — compatible with glycol-based coolants
Coil Insulation Class Class H (180°C rated insulation)
Duty Cycle Intermittent (on-demand heating cycles)
Response Time < 100 ms (fast opening/closing response)
Mounting Style Threaded (M12×1.5, M14×1.5), flange, or inline hose connection
Application Class Heavy-Duty Trucks, Buses, Construction Equipment, Power Generation Units
电磁阀 -4


电磁阀 -3


Parameter Value / Detail
Operating Voltage 24V DC (standard for heavy-duty trucks); some models support 12V
Coil Resistance 15–25 Ω (typical at 20°C)
Power Consumption ~15W – 25W
Working Pressure Up to 2.5 bar (coolant system pressure)
Temperature Range
- Ambient -40°C to +120°C (-40°F to +248°F)
- Media (Coolant) Max 110°C (230°F)
Flow Capacity (Kv) 0.8 – 1.5 m³/h
Orifice Size 3.0 – 4.5 mm
Sealing Level IP67 – Dust-tight and protected against temporary water immersion
Connection Ports G1/4" BSPP, M12×1.5, or quick-connect fittings
Weight Approx. 300–500 g


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