Ningguo Kingcool Import and Export Co., Ltd is a China Washing Machine Parts-Inlet Valve Manufacturers and one-stop appliance parts supplier. We build our range around the water-fill circuit of domestic and semi-commercial washers: solenoid inlet valves, inlet and drain hoses, drain motors, pumps, timers, clutches and control systems.
Our inlet valve programme is configured around the washer platform rather than sold as a single universal item. Coil voltage, port quantity, inlet thread, outlet spigot diameter, mounting bracket and electrical connector are matched to the machine family, the fill rate required and the control board that drives the valve.
What We Supply in the Inlet Valve Range
The inlet valve is the entry point of the wash cycle. It opens on command from the programme controller, admits mains water through a screened port and closes when the pressure switch or flow sensor reaches the target level. Because it sits on a pressurised line, sealing quality, diaphragm consistency and coil insulation determine how long the part survives in the field.
We supply single and multi-port solenoid valves for cold fill, hot fill and dual-fill configurations, together with the surrounding fill-circuit hardware so a service or production order can be completed from one source.
| Range Item | Typical Function | Configuration Variables |
|---|---|---|
| Single-port inlet valve | Cold fill for top-load and compact washers | Coil voltage, thread size, spigot diameter, bracket |
| Dual / multi-port valve | Hot and cold fill, detergent and softener compartments | Port count, flow split, coil grouping, connector type |
| Inlet and drain hose | Mains connection and discharge path | Length, coupling thread, hose grade, end fittings |
| Drain motor and pump | Emptying the tub after wash and rinse | Voltage, pump cover, impeller, mounting pattern |
| Timer and control system | Programme sequencing and fill command | Programme set, shaft type, terminal layout |
Application Fit Across Washer Platforms
Inlet valves are not interchangeable across platforms. A valve that fills a 6 kg top-loader correctly may over-fill or trip the pressure switch on a front-loader with a different tub volume and fill curve. We match the valve to the machine class before quoting.
- Top-load washers: single or dual cold-fill valves with a short fill path and a bracket that locates on the rear panel.
- Front-load washers: multi-port valves feeding detergent, softener and pre-wash compartments, often with a screened inlet and a higher flow rate.
- Hot and cold fill machines: paired coils with independent energisation so the controller can blend temperature.
- Semi-automatic and twin-tub units: simple single-coil valves with mechanical timer control.
- Service and repair channels: replacement valves selected by machine brand, model and connector photograph.
Materials and Critical Specifications
Water contact parts are selected for corrosion resistance and long-term sealing. Bodies and inlet fittings are commonly produced in engineering-grade thermoplastic with brass or stainless steel threads where the application calls for them. Diaphragms and gaskets are moulded to a controlled thickness so the valve seats repeatably across thousands of cycles.
- Coil: rated voltage and frequency, insulation class, winding encapsulated with a thermal protector on pump and motor assemblies.
- Body and ports: port count, inlet thread, outlet spigot diameter, flow direction.
- Sealing: diaphragm material, gasket hardness, seat finish, leak-tightness at rated line pressure.
- Electrical interface: terminal or plug type, lead length, connector keying.
- Mechanical interface: mounting bracket hole spacing, orientation, clearance to the cabinet.
How We Build and Control Quality
Ningguo Kingcool combines industry and trade and is dedicated to producing metalized polypropylene film capacitors, with high-precision slitting and winding equipment, production lines and testing equipment, and an annual capacity of 10 million metalized film capacitors. That manufacturing discipline carries into the appliance parts we supply: dimensional control on mating features, consistent coil winding, and inspection of sealing and flow behaviour before packing.
For inlet valves, the checks that matter in production are the ones that predict field failure: coil resistance and insulation, diaphragm thickness and concentricity, seat sealing under pressure, flow rate at the specified supply pressure, and connector retention. We confirm the inspection scope with the customer before the first batch so acceptance criteria are agreed rather than assumed.
One-stop supply: washing machine parts, Refrigerator Parts and Air-Conditioner Parts can be consolidated into a single order, which reduces the number of suppliers a service or assembly operation has to manage.
Configuration Options
Most inlet valve enquiries resolve to a small number of variables. Once these are fixed, the part number and the packing format follow.
- Coil voltage and frequency, including dual-voltage variants for export markets.
- Number of ports and which compartment each port serves.
- Inlet thread standard and outlet spigot diameter.
- Connector type, lead length and terminal orientation.
- Mounting bracket shape and fixing centres.
- Bulk pack, service box or branded retail packaging.
Installation, Commissioning and Maintenance
Inlet valves are installed on the cold or hot supply line behind the machine, with the inlet screen facing the supply and the outlet spigot pushed fully onto the hose or fill chamber. The coil terminals connect to the harness; the bracket locates the valve so the hose is not under tension.
- Confirm supply pressure is within the valve rating before commissioning.
- Check the inlet screen is fitted and clean; debris is a common cause of slow fill.
- Verify the fill level against the pressure switch or flow sensor setting after replacement.
- Inspect the diaphragm and seat during service; replace the valve if the seat is scored or the coil shows heat damage.
- Keep spare valves, hoses and drain pumps on hand for service fleets to reduce machine downtime.
Information We Use to Configure Your Solution
A workable quotation needs the machine context, not just a part name. The table below shows what we ask for and why each item changes the configuration.
| Project Input | Why We Need It |
|---|---|
| Washer brand, model and platform | Determines port count, bracket and connector family |
| Supply voltage and frequency | Sets the coil rating for the destination market |
| Fill type: cold, hot or dual | Defines port arrangement and coil grouping |
| Inlet thread and outlet spigot dimensions | Ensures the valve mates with the existing hose and chamber |
| Connector photo or drawing | Prevents harness mismatch on replacement parts |
| Target quantity and pack format | Sets bulk, service-box or retail packaging |
| Acceptance criteria and inspection scope | Aligns sealing, flow and electrical checks before shipment |
Documentation, Packing and Delivery Scope
Orders are packed to protect the coil, connector and spigot in transit. Bulk cartons are used for production volumes; individual service boxes suit repair channels that need identifiable parts on the shelf. We confirm the packing format, carton marking and quantity per carton with the customer before production.
Where a customer needs a specific inspection record or a sample for approval, we agree that scope in advance so the first shipment matches the approved part. Our wider catalogue covers the rest of the fill and drain circuit, including PRODUCT families for refrigeration, air conditioning and home appliances.
Frequently Asked Questions
Can you supply an inlet valve matched to a specific washer model?
Yes. Send the brand, model, supply voltage, port count and a photograph of the existing valve and connector. We match the coil rating, thread, spigot diameter and bracket to that platform and confirm the part before production.
What is the difference between a single-port and a multi-port inlet valve?
A single-port valve fills the tub through one cold-water path. A multi-port valve has two or more independently energised coils, allowing the controller to direct water to detergent, softener or pre-wash compartments, or to blend hot and cold supply.
Which checks confirm an inlet valve is fit for use?
Coil resistance and insulation, diaphragm thickness and concentricity, seat sealing under rated line pressure, flow rate at the specified supply pressure, and connector retention. We agree the inspection scope with the customer before the first batch.
Do you supply the rest of the washing machine fill and drain circuit?
We supply inlet and drain hoses, drain motors, pumps, impellers, timers, clutches, gear boxes, control systems and rubber seals, so a service or production order can be consolidated rather than split across several suppliers.
How should inlet valves be stored before installation?
Keep them in the original packaging, away from direct sunlight and heat sources, with the inlet screen and spigot protected. Store in a dry area so the coil and terminals are not exposed to moisture before fitting.
What information do you need to prepare a quotation?
Machine platform, supply voltage and frequency, fill type, inlet thread and outlet spigot dimensions, connector details, target quantity, pack format and any acceptance criteria. With those inputs we can confirm the configuration and issue a quotation.
