Relay_Water Valve_Solenoid Valve_Frequently Asked Questions_Knowledge Q&A-Relay_water Valve

QCan normally open valves be used in drinking water systems?

A
Our solenoid valves are RoHS and Reach certified, meet drinking water standards, and can be used in drinking water systems.
QWhat do I need to pay attention to when I need to perform surface treatment in order to prevent oxidation of the insulation of printed boards?

A
Dust cover type and solder resist type may cause malfunction due to surface treatment agent geting inside the relay, so do not performsurface treatment or install the relay after surface treatment.bome surace treatment agents may have an adverse eect on the relay, such as dissolving the housing, so please select them caretulland check them during actual use.Whenever possible, use the spraying or brushing process for surface treatment, and do not use the dip-coaing process. Use liquidsurface treatment agent at room temperature as much as possible, and spray the surace treatment agent only when the relay is cooleddown to room temperature. The surface treatment agent can be dried naturally, it can also be dried at a constant temperature, but thedrying temperature should not exceed 60*. it is also forbidden to lower the drying temperature before the surface treatment agent isdried, otherwise the surface treatment agent may be sucked back into the relay and fail.
When special surface treatment process is used, please contact us for confirmation in order to provide suitable products.
QHow is the sealing performance of a normally open valve?

A
The valve seat seal and the sealing ring use EPDM materials, which can reduce the risk of leakage and improve the sealing effect. It is also necessary to keep the inside of the valve clean to avoid the accumulation of particles in the fluid, which may cause poor sealing.
QAbout the cleaning of the relays?

A
Use only alcohol-based solvents (e.g., isopropyl alcohol). Avoid chlorine-based, strong acid/alkaline, or ultrasonic cleaners, as they can damage relay materials, contacts, or internal seals. Always follow the specific cleaning instructions in the product datasheet.
QCan solenoid water valves be used in high temperature or high pressure environments?

A
This depends on the material, design and sealing material of the valve. Our solenoid water valve is made of plastic, which is usually not suitable for high temperature or high pressure environments and can generally only work at room temperature and low pressure because its material has poor tolerance to high temperature and high pressure.
QWhat are the relay safety precautions?

A
Key precautions include:
·De-energize circuits before handling or wiring.
·Use appropriate personal protective equipment (PPE).
·Ensure correct voltage/current ratings for coil and contacts to prevent overheating/arcing.
·Implement proper insulation and guarding for high-voltage applications.
·Provide adequate ventilation if relays generate significant heat.
·Follow lockout/tagout procedures during maintenance.
QHow to maintain a solenoid valve?

A
Clean the outside of the solenoid valve regularly to keep its surface clean. Check whether the connection parts are loose, and tighten them in time if they are loose. Check the condition of the valve core and sealing surface at regular intervals, clean them in time if there are impurities, and replace the parts that are severely worn in time. For solenoid valves that are used for a long time, lubricating oil can be added appropriately to ensure the flexible movement of the valve core.
QWhat is the recommended minimum applicable load for general purpose relays?

A
We recommend a minimum load of 10mA at 5V DC or 100mA at 24V DC for reliable contact performance. Applying loads significantly below this ("dry circuit" conditions) risks contact failure due to insufficient current to break through oxidation film buildup.
QWhat are the reasons why the solenoid valve does not open after being energized?

A
The solenoid coil may be damaged and unable to generate sufficient electromagnetic force; there may be a power failure, such as insufficient voltage, line break or short circuit; the valve core may be stuck by impurities and cannot move normally; the pilot hole of the pilot solenoid valve may be clogged, etc.
QWhat is the significance of the maximum allowable coil voltage?

A
Exceeding the maximum coil voltage can cause:
·Overheating damaging insulation or coil wire.
·Premature failure due to excessive electromagnetic force.
·Magnetic saturation, reducing performance efficiency.
Always operate within the specified coil voltage range for reliability and longevity.
QCan the flushing solenoid valve be used for flushing with different types of media?

A
General flushing solenoid valves are suitable for flushing clean media such as water, air, and oil. For corrosive media, it is necessary to select solenoid valves made of corrosion-resistant materials, such as stainless steel, polytetrafluoroethylene, etc. For media containing particulate impurities, solenoid valves with anti-clogging structures or large diameters should be selected to prevent impurities from clogging the valve core or affecting the normal operation of the valve.
QWhen selecting a relay, can the voltage and current of the load be simply converted by switching power?

A
No. While power (Watts = Volts x Amps) is conserved, relay contact ratings are separately specified for voltage and current due to:
·Arc suppression capability (voltage dependent).
·Contact erosion resistance (current dependent).
A contact rated for 10A/250VAC cannot safely handle 25A/100VAC, even though the power is similar. Always select based on the actual load voltage and current.
QWhat is the main function of the water drain solenoid valve?

A
It is mainly used to control water discharge, realize the on-off and flow regulation of water flow, and is widely used in irrigation, water supply and drainage, water treatment and other systems.
QAre general purpose relays suitable for loads up to 200mA? Why?

A
Yes, generally suitable. Most general-purpose relays have a minimum recommended load well below 200mA (often 10-100mA depending on voltage). A 200mA load typically provides sufficient current to ensure reliable contact cleaning action ("wetting current") and overcome surface film resistance, making them a good fit.
QHow to choose the right drain solenoid valve?

A
Need to consider the working pressure, flow rate, medium temperature, voltage, connection mode and other factors. For example, according to the actual application of the scene of the water pressure to select the solenoid valve can withstand the corresponding pressure, according to the required drainage flow to select the appropriate caliber solenoid valve, according to the temperature of the use of the environment to select the solenoid valve applicable to the temperature range and so on.
QWill a molded relay have higher electrical durability than a non-molded one? Why?

A
Yes, typically. Molded relays (encapsulated in resin) offer:
Superior arc containment: The resin traps and extinguishes arcs generated during switching, minimizing contact erosion.
Protection from contaminants: Sealing prevents dust, moisture, and corrosive gases from degrading contacts.
Enhanced heat dissipation: Some resins aid in managing heat from switching/coil.
This leads to significantly higher electrical endurance (number of operations under load) compared to non-molded (open or covered) relays.