2. System resistance: Pipeline length, diameter, number of elbows, valves, and the height of the liquid delivery lift will increase the system resistance. Excessive resistance will reduce the actual flow rate and head of the pump.

If cavitation occurs, you can take the following solutions:
1. Improve the suction conditions: Lower the installation height of the pump to increase the inlet pressure; shorten the suction pipeline length, reduce the number of elbows and valves, and select a larger-diameter suction pipeline to reduce suction resistance.

2. Reduce the liquid temperature: If the conveyed liquid temperature is too high, it is easy to vaporize and form vapor bubbles. You can take cooling measures (such as installing a cooler) to reduce the liquid temperature.

3. Clean the suction inlet and filter: If the suction inlet or filter is blocked by impurities, it will increase the suction resistance and cause cavitation. Clean the suction inlet and filter regularly to ensure smooth suction.

4. Replace the pump with a more cavitation-resistant model: If the above measures cannot solve the cavitation problem, you can consider replacing the pump with a model with better cavitation resistance (such as a pump with a double-suction impeller or a low-NPSH pump).

The warranty scope mainly includes the following:
1. Manufacturing defects: If the pump body, impeller, motor (provided by our company), and other key components have material defects or manufacturing process problems during the warranty period, which cause the pump to fail to operate normally, we will provide free repair or replacement services.

2. Installation guidance errors: If our after-sales technicians make errors in on-site installation guidance, which lead to pump damage, we will be responsible for free repair or replacement.

The following situations are not covered by the warranty:
1. Damage caused by improper operation (such as overloading, dry running, incorrect liquid medium, etc.) by the customer.

2. Damage caused by natural disasters (such as earthquakes, floods, lightning strikes, etc.), man-made accidents (such as collisions, fires, etc.), or force majeure factors.

3. Damage caused by unauthorized disassembly, modification, or repair of the pump by the customer or a third party.

4. Normal wear and tear of parts (such as mechanical seals, bearings, packing, etc.) during the use of the pump.

2. Email: Send an email to our after-sales service mailbox (aftersales@pumpcompany.com) with detailed information about the pump failure. We will reply to you within 2 working hours and arrange subsequent repair work.

3. Online service platform: Log in to our official website, enter the "after-sales service" section, fill in the repair application form online, and submit it. Our after-sales team will process your application in a timely manner.

The general after-sales response time is as follows:
1. For customers in the same city or nearby areas, our after-sales technicians will arrive at the site within 24 hours after receiving the repair request.

2. For customers in other regions, our after-sales technicians will arrive at the site within 48-72 hours (depending on the distance and traffic conditions) after receiving the repair request.

3. For urgent failures that affect the customer's production, we will give priority to handling them and shorten the response time as much as possible.

The maintenance process is generally divided into the following steps:
1. Failure diagnosis: After the after-sales technician arrives at the site, he will first communicate with the customer to understand the pump's operation status and failure phenomenon, then conduct on-site inspection and testing (such as checking the pump's operation sound, vibration, temperature, pressure, flow rate, etc.) to determine the cause of the failure.

2. Maintenance plan formulation: Based on the failure diagnosis results, the technician will formulate a detailed maintenance plan, including the required spare parts, maintenance tools, and maintenance time, and communicate with the customer to confirm the plan.

3. Maintenance implementation: With the customer's consent, the technician will carry out maintenance work according to the maintenance plan, such as replacing damaged parts, adjusting pump parameters, cleaning the pump and pipeline, etc.

4. Test run and acceptance: After the maintenance is completed, the technician will conduct a test run of the pump to check whether its performance parameters meet the requirements. After the test run is successful, the customer will be invited to conduct on-site acceptance. If the customer is satisfied, the maintenance work will be completed.

5. Follow-up tracking: Within 1 week after the maintenance is completed, our after-sales team will conduct a follow-up call to inquire about the pump's operation status and ensure that the pump operates normally.

A1: The conditions for customizing a pump mainly include the following:
1. Clear application scenarios: The customer needs to have a clear understanding of the pump's application field (such as water treatment, chemical industry, oil and gas, power generation, etc.) and specific use environment (such as indoor/outdoor, high temperature/high pressure, corrosive environment, etc.).

2. Specific performance requirements: The customer needs to provide specific performance parameters such as the required flow rate, head, pressure, temperature, and medium characteristics of the pump, which are the basis for our company to design and customize the pump.

3. Reasonable customization quantity: Generally, the customization of pumps requires a certain quantity (usually not less than 5 units) to ensure the feasibility of the production process and cost control. For special cases with a small quantity, our company will evaluate the technical difficulty and cost and decide whether to accept the customization.

4. Adequate customization cycle: The customization of pumps involves design, material selection, processing, testing, and other links, which takes a longer time than the supply of standard pumps. The customer needs to have a reasonable customization cycle (usually 3-6 months, depending on the complexity of the pump).

To ensure the smooth progress of the customization work, you need to provide the following information to our company:
1. Basic information of the customer: Company name, contact person, contact information, delivery address, etc.

2. Application scenario details: Application field, use environment (temperature, pressure, humidity, corrosiveness, etc.), installation method (horizontal/vertical), and whether there are special space restrictions.

3. Medium characteristics: Name, composition, density, viscosity, pH value, solid particle content and size, corrosiveness, flammability, explosiveness, etc. of the conveyed liquid.

4. Performance parameters: Required flow rate (including rated flow rate and maximum/minimum flow rate), head (including rated head and maximum/minimum head), working pressure, medium temperature, required pump speed, power supply parameters (voltage, frequency, phase number), etc.

5. Special requirements: Such as special materials for pump components (such as stainless steel, titanium alloy, Hastelloy, etc.), special seals (mechanical seal, magnetic seal, etc.), special control systems (frequency conversion control, remote monitoring, etc.), and compliance with relevant industry standards (such as API, ISO, ASME, etc.).

2. Contract signing: After the customization plan is confirmed by both parties, we will sign a formal customization contract, which clearly stipulates the product specifications, performance parameters, delivery time, quality standards, payment terms, after-sales service, and other contents.

3. Design and review: Our R&D department will carry out detailed design work according to the confirmed customization plan, including the design of the pump's overall structure, impeller, pump casing, seal, and other components, and the selection of materials and accessories. After the design is completed, our company will organize a technical review meeting to review the design scheme from the aspects of technical feasibility, performance reliability, and production process, and modify and optimize the design scheme according to the review results.

4 .Material procurement and processing: After the design scheme is reviewed and approved, our procurement department will purchase the required materials and accessories according to the design requirements, and strictly inspect the quality of the purchased materials and accessories to ensure they meet the design standards. Then, our production workshop will process and manufacture the pump components according to the design drawings, and conduct strict quality control in each processing link.

5. Assembly and testing: After all the components are processed, our assembly workshop will assemble the pump according to the assembly process. After the assembly is completed, the pump will undergo a series of tests, including performance testing (flow rate, head, pressure, power consumption, etc.), tightness testing, vibration testing, noise testing, and reliability testing, to ensure that the pump's performance and quality meet the contract requirements.

6. Delivery and on-site commissioning: After the pump passes all the tests, we will arrange for delivery according to the contract agreement. After the pump arrives at the customer's site, our after-sales technicians will go to the site to conduct on-site installation guidance and commissioning work, and train the customer's operation and maintenance personnel to ensure that the customer can use the pump correctly.

To track the progress of the customization project, you can take the following methods:
1. Designated project manager: After the contract is signed, our company will assign a dedicated project manager to be responsible for the entire customization project. The project manager will communicate with you regularly (usually once a week) to report the progress of the project, including the progress of design, material procurement, processing, assembly, testing, etc., and answer your questions about the project.

2. Online project management platform: Our company has an online project management platform. After the customization project starts, we will open a dedicated account for you. You can log in to the platform at any time to view the real-time progress of the project, including the completion status of each task, the schedule, and the relevant documents (such as design drawings, test reports, etc.).

3. Active communication: If you have any questions about the project progress or need to know the latest situation, you can contact the project manager or our sales team at any time. We will reply to you in a timely manner and provide you with the required information.