1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your new Normally Closed Electric Brass Solenoid Valve. Designed for precision and reliability, this valve features a robust brass casting structure, offering excellent wear resistance, anti-corrosion properties, and high-temperature tolerance. It functions as a steady flow valve, preventing dry burning and monitoring fluid flow in various applications.
2. Safety Information
Please read and understand all safety instructions before installing or operating the valve. Failure to follow these instructions may result in property damage, personal injury, or death.
- Always disconnect power before performing any installation, maintenance, or troubleshooting.
- Ensure the voltage supplied matches the rated voltage of the solenoid valve.
- Installation should be performed by a qualified professional if you are unsure.
- Do not exceed the specified water pressure or fluid temperature limits.
- Ensure proper sealing of all connections to prevent leaks.
- This valve is designed for water use only within the specified temperature range.
3. Product Overview
The electric solenoid valve consists of a brass body with threaded inlet and outlet ports, and an electromagnetic coil assembly. The valve is 'Normally Closed', meaning it remains closed when no power is applied and opens when energized.
4. Specifications
| Attribute | Value |
|---|---|
| Material | Brass |
| NC or NO | Normally Closed |
| Actuator Mode | Without Manual And Instruction |
| Structure | Shutoff |
| Port Size | G1/2" (External thread 4 points) or G3/4" |
| Media | Water |
| Temperature of Media | High Temperature (Operating fluid temperature: 0-55 °C) |
| Power | Solenoid |
| Standard or Nonstandard | Standard |
| Pressure | Low Pressure (0.02-0.8Mpa) |
| Voltage Options | DC 5V, 12V, 24V, 36V, 48V; AC 110V, 220V |
| Working Mode | Short-time quota system (intermittent duty cycle) |
| Insulation Grade | E |
| Life Expectancy | > 100,000 times |
| Environmental Altitude | < 2,500 meters |
| Environmental Ambient Temperature | 0 to 40 °C |
| Environmental Air Relative Humidity | <95% (at 25 °C) |
Water Flow Characteristics (for 12V model, indicative)
| Water Pressure (Mpa) | Flow (L/min) |
|---|---|
| 0.02 | > 5 |
| 0.1 | > 11 |
| 0.3 | > 18 |
| 0.8 | > 32 |
5. Installation and Setup
5.1 Pre-installation Checks
- Verify that the valve's voltage rating matches your power supply.
- Ensure the port size (G1/2" or G3/4") is compatible with your plumbing system.
- Inspect the valve for any visible damage.
- Turn off the main water supply and electrical power to the installation area.
5.2 Mounting
- Install the valve in a location that is easily accessible for maintenance and inspection.
- Ensure the valve is installed with the flow direction arrow on the valve body pointing in the direction of water flow.
- Use appropriate thread sealant (e.g., PTFE tape) on the threaded connections to ensure a watertight seal.
- Tighten connections securely but do not overtighten, which can damage the threads or valve body.
5.3 Electrical Wiring
- Connect the power supply wires to the electrical terminals on the solenoid coil (refer to Figure 3 and 4).
- Ensure all electrical connections are secure and insulated to prevent short circuits or electrical hazards.
- For DC models, observe polarity if specified (though many small solenoids are non-polar). If not specified, test connection.
- For AC models, ensure proper grounding if applicable.
6. Operation
This is a Normally Closed (NC) solenoid valve. This means:
- When no electrical power is applied to the coil, the valve remains in a closed position, preventing fluid flow.
- When the correct electrical power is applied to the coil, the electromagnetic force opens the valve, allowing fluid to flow through.
- Upon removal of power, the valve returns to its closed position.
The valve is designed for intermittent duty cycle operation (short-time quota system). Continuous energization for extended periods may lead to overheating and damage to the coil.
7. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your solenoid valve.
- Inspection: Periodically check the valve for any signs of leaks, corrosion, or damage to the electrical wiring.
- Cleaning: The inlet port features an integrated filter screen (Figure 6). If flow is reduced, disconnect power and water supply, then carefully remove and clean the filter screen. Reinstall securely.
- Coil Check: Ensure the solenoid coil is free from debris and securely attached.
- Fluid Quality: Using clean water will extend the life of the valve and prevent clogging.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Valve does not open when energized | No power supply; Incorrect voltage; Damaged coil; Clogged valve mechanism | Check power connections and voltage; Replace coil if damaged; Clean valve internals/filter. |
| Valve does not close when de-energized | Debris in valve; Damaged spring/seal; Continuous power supply | Clean valve internals; Inspect and replace seals/springs; Check power control circuit. |
| Reduced flow rate | Clogged filter screen; Insufficient water pressure | Clean the inlet filter screen; Verify water supply pressure meets specifications. |
| Water leakage from connections | Loose connections; Insufficient thread sealant; Damaged threads/seals | Tighten connections; Reapply thread sealant; Inspect and replace damaged parts. |
9. User Tips
- Port Size Selection: The port size (G1/2" or G3/4") is a physical dimension and is independent of the operating voltage (e.g., 5V, 12V, 220V). Always ensure you select the correct port size for your plumbing system, regardless of the voltage variant you require.
- Intermittent Use: For applications requiring continuous flow, consider using a valve designed for continuous duty to prevent coil overheating and premature failure.
10. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms, technical support, or service inquiries, please contact your retailer or the point of purchase. Keep your purchase receipt as proof of purchase.
