A: Our standard MOQ is one 20-foot container. However, for trial orders, we are happy to be flexible based on your specific requirements. Please feel free to contact us for more details.

A: The standard lead time is 35–45 days after receipt of the deposit. Delivery time may vary depending on order quantity and product specifications. Please contact us for a more accurate timeline.

A: Yes, samples are available upon request. Please note that the shipping cost for samples is to be borne by the buyer. Once a formal order is placed, the sample cost may be refunded depending on the order value.

A: Our standard payment terms are 30% T/T deposit in advance, with the 70% balance payable against the copy of the Bill of Lading. Other payment arrangements may be considered for long-term partners. For further inquiries, please contact us at jiuyifengji@163.com.

A: Yes, we have a dedicated R&D department that can support product customization and development in collaboration with our customers. OEM services are available subject to reaching a mutually agreed annual purchase volume. Please contact us to discuss your requirements.

A: Axial fans move air parallel to the shaft with high flow but lower pressure. Centrifugal fans redirect airflow 90°and are suited for medium to high pressure applications. Mixed flow fans combine both, using a conical impeller to deliver balanced airflow and pressure.

In general: choose axial for high volume/low pressure, centrifugal for higher pressure, and mixed flow for a balance of both. Please contact our technical team for a customized recommendation.

A: Yes, our fans can be customized for different voltage and frequency specifications to meet the electrical standards of various countries and regions (e.g., single-phase / three-phase, 50Hz / 60Hz, 220V / 380V / 440V). Please provide your local electrical requirements when placing an inquiry, and we will configure the appropriate solution for you.

A: High-temperature fans are generally defined as those capable of handling airstream temperatures of 120°C (250°F) and above. For corrosive or harsh environments, we offer fans built with stainless steel and special alloys, with anti-corrosion coatings available. If your application involves high-temperature exhaust, chemical fumes, or humid/corrosive conditions, please share your specific parameters and we will recommend the appropriate model.

A: Key parameters to consider when selecting a fan include: required airflow (m³/h), static pressure (Pa), air temperature and medium characteristics, noise level restrictions, and inlet/discharge configuration. Our engineering team is available to recommend the most suitable model based on your specific application data. Please send your technical requirements to our email or contact our sales engineers directly.

A: Noise levels vary by model and operating conditions. Standard industrial fans typically produce 60–85 dB at 1 meter distance; smaller low-speed fans may run as low as 50–65 dB, while large high-speed fans can exceed 90 dB. Detailed noise data is available in each product's technical datasheet. We can provide expected sound power and pressure level data based on your specific installation conditions. For applications with strict noise requirements, please contact us for a customized solution.

A: Submersible pumps must not run dry. Water acts as the cooling medium for the motor — without it, the motor will overheat and burn out, and the seals and bearings will fail due to loss of lubrication. We recommend installing dry-run protection sensors or float switches to automatically shut off the pump when water levels drop too low. Our DC submersible pumps feature built-in intelligent controllers with automatic dry-run protection to prevent damage.

A: Submersible pump motors are primarily designed for vertical operation. If horizontal installation is required, the motor must be carefully aligned with the pump shaft and properly secured to prevent additional bearing loads and vibration that could cause motor damage. The pump should be installed vertically in water, with a maximum tilt angle not exceeding 15°; horizontal installation will significantly shorten the pump's service life. If horizontal installation is required for a specific application, please contact us to confirm model suitability.

A: When water freezes inside or around a pump, the expansion of ice puts immense pressure on the pump casing and pipes, which can cause cracking and serious damage. The good news is that deep well submersible pumps carry very little freezing risk, as they are installed deep below the frost line. Surface-mounted pumps and exposed pipework, however, require proper freeze protection. In cold climates, always drain the pump and pipework after shutdown, or apply adequate insulation to prevent freeze damage.

A: Yes, our DC and DC/AC pumps are designed specifically for solar power applications. They use brushless permanent magnet DC synchronous motors, achieving 15–20% higher efficiency compared to standard motors, significantly reducing the solar panel capacity required. A solar water pump system consists of three components: the solar controller, the pump, and the solar panels. The solar panels generate electricity, which drives the pump through the controller. The system supports automatic switching between solar and grid power — when solar energy is insufficient, it automatically switches to mains supply to ensure continuous water delivery. Solar pump systems are ideal for agricultural irrigation, livestock water supply, and remote off-grid applications, with low maintenance and operating costs.

A: Single-phase motors run on a single-phase AC supply and require a capacitor to start. They are suited for low-power applications such as household fans, pumps, and appliances.

Three-phase motors use a three-phase supply, are self-starting, and are ideal for industrial applications with heavy or continuous loads. Three-phase motors typically achieve 85–95% efficiency, compared to 75–85% for single-phase motors. For light-duty or household use, single-phase motors are more practical; for industrial or heavy-load applications, three-phase motors are recommended.

A: Yes. Our motors can be configured for various voltage and frequency specifications to comply with local electrical standards worldwide, including single-phase / three-phase, 220V / 380V / 440V / 480V, and 50Hz / 60Hz. Please provide your local power supply details when making an inquiry, and we will recommend the appropriate configuration.

A: The core of motor selection for pumps and fans lies in precisely matching three fundamental electrical parameters — voltage, frequency, and power (kW/HP) — to both the equipment's requirements and the available power supply. Additional factors include the operating environment (temperature, humidity, dust, corrosion), motor speed, starting torque, and required protection class. Motors operate at peak efficiency when fully loaded, so avoid oversizing — and undersizing is even worse. Our sales engineers can recommend the best-matched motor based on your equipment specifications. Please feel free to contact us.

A: The pressure (bar/PSI) represents the stripping force applied to the surface, while the flow rate (L/h or GPM) determines rinsing power — together they define overall cleaning performance. Specific pressure and flow rate vary by model; please refer to each product's technical datasheet or contact us for a recommendation.

A: Cold water pressure washers are ideal for removing general dirt and debris. However, for surfaces contaminated with oil or grease, hot water is essential — the same principle as washing greasy hands: cold water simply won't cut it. Hot water cleaning loosens dirt faster, saving up to 40% of cleaning time, reducing detergent use, and achieving measurable reduction of bacteria and viruses.

Our current portable pressure washer models are cold water units, with a recommended inlet water temperature not exceeding 40°C. For hot water cleaning needs (e.g., food industry, heavy equipment degreasing), please contact us for professional model recommendations.

A: When selecting a model, consider your application: higher PSI provides greater stripping power, while higher GPM improves rinsing efficiency. Light-duty household tasks such as car washing or cleaning outdoor furniture typically require 90–130 bar; medium-duty tasks like decks and fences work best at 140–195 bar.

Our portable pressure washers are well-suited for household cleaning and light commercial use such as car washing, garden and patio cleaning, and equipment surface cleaning. For heavy-duty continuous commercial operations, a professional-grade model may be more appropriate — please share your requirements and we will advise accordingly.

A:Key maintenance tips based on industry best practices:

Before each use, turn on the water supply and let water flow through the machine to purge any air from the system. After use, squeeze the spray gun trigger to release remaining pressure before switching off — this prevents pump damage from pressurized storage. Regularly (monthly) inspect and clean nozzles to prevent clogging. Before long-term storage, drain all water from the pump and hoses to prevent freezing or corrosion. Store the unit in a cool, dry indoor location to prevent rust and moisture damage. In hard water areas, regularly use a dedicated descaling agent to remove mineral build-up, which improves water flow, enhances heat transfer, and reduces strain on the pump.