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603911A
Sunlight
603911A
DC brush
24 VDC nominal(18 VDC to 32VDC allowable operating range)
0.5N.m
6±1.5rpm
≤0.1A
≥1.1N.m
≤0.5A
Sleeve DJ7061-1.8-11,Connector DJ611-1.8A
less than 45 dB at 10cm
-40℃ to 85℃
0.220KG
90°
≤0.2N.m
more than 1000/L in the fully open position
IP54
more than 50,000 cycles
air leakage zero fault detection per 3 minutes at a 0.4Mpa pressure
internal leakage zero fault detection less than 950ml per hour at the temperature 85℃ under a hydraulic pressure of 0.1Mpa
| Quantity: | |
|---|---|
Model: 603911A / AK90
Brand: Sunlight
Product Overview
The Electric Water Valve 603911A (AK90) is engineered to precisely control coolant flow in vehicle heating systems. Integrated into the engine’s water circulation loop, this valve modulates flow to the heater core, enabling consistent in-cabin temperature control. Equipped with a DC brush motor actuator and 90° stem travel, it ensures reliable, accurate actuation under varied operating conditions.
| Feature | Specification | Benefit |
|---|---|---|
| Input Voltage | 24 VDC (operating range 18 – 32 VDC) | Compatible with most commercial & heavy-duty vehicle systems |
| Rated Torque | 0.5 N·m | Smooth, stable valve actuation under load |
| Rated Speed | 6 ± 1.5 rpm | Precise modulation, minimal overshoot |
| Stall Torque | ≥ 1.1 N·m | Strong startup under load |
| Stall Current | ≤ 0.5 A | Safe electrical limits |
| Operating Current (Load) | ≤ 0.1 A | Energy-efficient performance |
| Noise Level | < 45 dB @10 cm | Quiet operation in vehicle cabin environment |
| Operating Temperature | –40 ℃ to +85 ℃ | Suitable for extreme climates |
| Net Weight | 0.220 kg | Compact and lightweight |
| Rotation Range | 90° | Ideal for open-close or modulated control |
| Opening / Closing Torque | ≤ 0.2 N·m | Low friction, responsive actuation |
| Flow Rate (Fully Open) | > 1000 L/h | High throughput for demanding heating needs |
| Protection Level | IP54 | Dust and splash resistant for engine bay environments |
| Service Life | ≥ 50,000 cycles | Durable and long-lasting |
| Leakage Testing | External: zero leakage @ 0.4 MPa / 3 min Internal: ≤ 950 ml/h at 85 ℃, 0.1 MPa | Excellent sealing performance |
Heating & cooling loops in commercial trucks and buses
Cabin HVAC systems in agricultural and construction machinery
Climate control in specialty, emergency, and utility vehicles
Any system requiring precise control of coolant or heater flow
Interested in full HVAC component systems? Explore our HVAC Solutions or check our selection of Brushless Fans for complementary parts.
Connector Type: DJ7061-1.8-11 & DJ611-1.8A
Mounting Tips: Align smoothly with coolant lines, avoid sharp bends and air pockets
Wiring Advice: Provide slack for maintenance or replacement
Commissioning: Before putting into service, run a full open/close cycle test to verify smooth motion and no abnormal noise
Undergoes rigorous durability and environmental aging tests
Dual leakage inspection: external and internal
Accurate positioning and travel control
Validated under real-world vehicle operating conditions
Individually packaged with anti-vibration protection
Includes installation guide and test report
Customized packaging and labeling available upon request
A: The nominal voltage is 24 VDC, and it supports an operating range of 18 to 32 VDC.
A: Yes — the operational temperature range is from –40 ℃ up to +85 ℃, making it suitable for extreme cold or heat.
A: External leakage is tested at 0.4 MPa for 3 minutes with zero detectable leakage. Internal leakage is limited to ≤ 950 ml/h under 85 ℃ and 0.1 MPa.
A: It is rated for at least 50,000 full open/close cycles under standard conditions.
A: Standard connectors are DJ7061-1.8-11 (sleeve) and DJ611-1.8A.
A: Yes. It pairs well with HVAC systems using brushless fans. Check our Brushless Fans for matching fan models.
For pricing, bulk orders, or custom versions (e.g. different voltage, torque, connector types), please contact our sales team:
International Sales: Sunny Li / Alisa Chen / Frances Zhang / Vicky Li
For phone, email, and details, see our Contact Us page.
Model: 603911A / AK90
Brand: Sunlight
Product Overview
The Electric Water Valve 603911A (AK90) is engineered to precisely control coolant flow in vehicle heating systems. Integrated into the engine’s water circulation loop, this valve modulates flow to the heater core, enabling consistent in-cabin temperature control. Equipped with a DC brush motor actuator and 90° stem travel, it ensures reliable, accurate actuation under varied operating conditions.
| Feature | Specification | Benefit |
|---|---|---|
| Input Voltage | 24 VDC (operating range 18 – 32 VDC) | Compatible with most commercial & heavy-duty vehicle systems |
| Rated Torque | 0.5 N·m | Smooth, stable valve actuation under load |
| Rated Speed | 6 ± 1.5 rpm | Precise modulation, minimal overshoot |
| Stall Torque | ≥ 1.1 N·m | Strong startup under load |
| Stall Current | ≤ 0.5 A | Safe electrical limits |
| Operating Current (Load) | ≤ 0.1 A | Energy-efficient performance |
| Noise Level | < 45 dB @10 cm | Quiet operation in vehicle cabin environment |
| Operating Temperature | –40 ℃ to +85 ℃ | Suitable for extreme climates |
| Net Weight | 0.220 kg | Compact and lightweight |
| Rotation Range | 90° | Ideal for open-close or modulated control |
| Opening / Closing Torque | ≤ 0.2 N·m | Low friction, responsive actuation |
| Flow Rate (Fully Open) | > 1000 L/h | High throughput for demanding heating needs |
| Protection Level | IP54 | Dust and splash resistant for engine bay environments |
| Service Life | ≥ 50,000 cycles | Durable and long-lasting |
| Leakage Testing | External: zero leakage @ 0.4 MPa / 3 min Internal: ≤ 950 ml/h at 85 ℃, 0.1 MPa | Excellent sealing performance |
Heating & cooling loops in commercial trucks and buses
Cabin HVAC systems in agricultural and construction machinery
Climate control in specialty, emergency, and utility vehicles
Any system requiring precise control of coolant or heater flow
Interested in full HVAC component systems? Explore our HVAC Solutions or check our selection of Brushless Fans for complementary parts.
Connector Type: DJ7061-1.8-11 & DJ611-1.8A
Mounting Tips: Align smoothly with coolant lines, avoid sharp bends and air pockets
Wiring Advice: Provide slack for maintenance or replacement
Commissioning: Before putting into service, run a full open/close cycle test to verify smooth motion and no abnormal noise
Undergoes rigorous durability and environmental aging tests
Dual leakage inspection: external and internal
Accurate positioning and travel control
Validated under real-world vehicle operating conditions
Individually packaged with anti-vibration protection
Includes installation guide and test report
Customized packaging and labeling available upon request
A: The nominal voltage is 24 VDC, and it supports an operating range of 18 to 32 VDC.
A: Yes — the operational temperature range is from –40 ℃ up to +85 ℃, making it suitable for extreme cold or heat.
A: External leakage is tested at 0.4 MPa for 3 minutes with zero detectable leakage. Internal leakage is limited to ≤ 950 ml/h under 85 ℃ and 0.1 MPa.
A: It is rated for at least 50,000 full open/close cycles under standard conditions.
A: Standard connectors are DJ7061-1.8-11 (sleeve) and DJ611-1.8A.
A: Yes. It pairs well with HVAC systems using brushless fans. Check our Brushless Fans for matching fan models.
For pricing, bulk orders, or custom versions (e.g. different voltage, torque, connector types), please contact our sales team:
International Sales: Sunny Li / Alisa Chen / Frances Zhang / Vicky Li
For phone, email, and details, see our Contact Us page.
