Clarify requirement

Functional and performance requirements

Main functions: Cut-off, adjustment, check, shunt or other special functions?
Flow Characteristics: What flow control characteristics are required? Such as equal percentage, linear or fast opening, etc.
Sealing performance: What are the requirements for the sealing performance of the Valve? Such as zero leakage, specific leakage rate, etc.
Operation mode: Manual, electric, pneumatic or hydraulic? Do you need remote or automated control?
Durability: What are the expectations for the service life of the valve? Do you need special treatment such as wear and corrosion resistance?

Dimensions and specifications
Nominal diameter: the diameter of the valve inlet and outlet.
Connection method: such as flange connection, thread connection, welding connection, etc., as well as specific connection standards and dimensions.
Structural form: such as straight-through type, Angle type, three-way type, etc., and the opening way of the valve (such as rotary type, lifting type, etc.).
Weight and Size restrictions: Are there any special restrictions on valve weight or mounting space size?

Additional requirements

Identification and labeling: Do you need a specific identification, label, or serial number on the valve?
Accessories and accessories: Do you need specific accessories or accessories, such as actuators, limit switches, position indicators, etc.?
Certification and standards: Do valves conform to specific industry, national or international standards? Are relevant certification and test reports required?

Delivery and service
Delivery time: What are the requirements for the delivery time of the valve?
After-sales service: What after-sales service should the supplier provide? Such as installation and commissioning guidance, technical training, troubleshooting, etc

Technical consultation and communication

Clarification of requirements:
Understand the specific needs of customers for valves in detail, including working conditions, media characteristics, functional requirements, performance parameters, etc.
Confirm the valve usage scenario, working environment, and any special operating requirements.
Technical Advice:
According to the needs of customers, provide suggestions on valve type, material, structure, driving mode, etc.
Analyze the advantages and disadvantages of different solutions to help customers make informed choices.
Performance prediction:
Predict the performance of the valve, including flow characteristics, sealing performance, pressure resistance, etc.
Provide the necessary calculation and analysis reports to support the accuracy of the forecast results.

Design Review:
Review valve designs to ensure they meet customer requirements and standards.
Propose modifications to optimize the design and improve its performance and reliability.
Technical support:
Provide necessary technical support during valve design, manufacture and installation.
Answer customers' technical questions and provide professional solutions.

project design

Select the valve type: According to the demand analysis results, select the appropriate valve type (such as Butterfly Valve, Ball valve, gate valve, etc.).
Determine the material: according to the characteristics of the medium and environmental conditions, select the appropriate body, disc, sealing surface and other materials.
Structure design: Design the overall structure of the valve, including the shape of the valve body, flow design, sealing structure, etc.
Drive mode selection: According to the operation requirements, select the appropriate drive mode (such as manual, electric, pneumatic, hydraulic, etc.).

Parts design: Design the various parts of the valve, including the valve body, valve disc, valve stem, seals, actuators, etc.
Valve body design: Consider bearing capacity, corrosion resistance and flow path design.
Disc design: Ensure a tight fit with the seat to achieve a good sealing effect.
Stem design: Consider strength and stiffness, as well as corrosion protection.
Seal design: Select the appropriate sealing material and structure to ensure sealing performance.
Actuator design: According to the driving mode, design the corresponding actuator, such as motor, cylinder, etc.
Assembly design: design the assembly method and sequence of parts to ensure the convenience and reliability of assembly.
Performance verification: Through calculation or simulation analysis, verify whether the performance of the valve meets the requirements.

Sample production and testing

The test of valve sample is an important step to verify its performance and quality. The testing process usually includes the following aspects:

Tightness test:
Objective: To verify the sealing performance of the valve in closed state.
Method: Install the valve on the test equipment, and observe whether the valve leaks by adjusting the pressure and temperature and other factors. During the test, data indexes such as minimum leakage and maximum leakage should be recorded. According to industry standards or design requirements, determine whether the sealing performance of the valve is qualified.
Note: During the test, the valve should be kept in a stable state to avoid the influence of external factors on the test results.
Opening and closing force test:
Purpose: To verify that the force required in the opening and closing process of the valve meets the design requirements.
Method: The combination of tractor and pressure gauge was used to test the valve. Record the maximum opening and closing force of the valve during opening and closing, and compare it with the design requirements.
Precautions: During testing, ensure the accuracy and reliability of the test equipment to avoid the impact of test errors on the results.
Service life test:
Purpose: To verify the durability and reliability of the valve during long-term use.
Methods: By simulating the actual use, the opening and closing experiments were carried out to record the use times of the valve and its influence on the performance of the valve. According to industry standards or design requirements, determine whether the service life of the valve is qualified.
Note: The stability and consistency of the experimental conditions should be maintained during the test to ensure the reliability of the test results.
Other performance tests:
Depending on the type and use of the valve, other performance tests may also be required, such as flow characteristic tests, pressure resistance tests, corrosion resistance tests, etc. These tests are designed to fully assess valve performance and quality.

volume production

Material processing:

The raw materials are cut, forging, casting and other processing technology to manufacture the various parts of the valve.
The processing accuracy and surface quality should be strictly controlled during the processing to ensure that the size and shape of the parts meet the design requirements.
Heat treatment:
The parts that need heat treatment are annealed, quenched, tempered, etc., to improve their mechanical properties and corrosion resistance.
Strict control of heat treatment process parameters to ensure stable and reliable heat treatment quality.
Machining:
Parts are finished, such as drilling, turning, milling, etc., to improve their accuracy and surface finish.
The use of high-precision CNC machine tools and processing equipment to ensure processing accuracy and efficiency.
Assemble:
Assemble the finished parts, including the installation of the valve body, valve cover, valve stem, seat, sealing ring, etc.
During the assembly process, it is necessary to pay attention to the matching accuracy and installation sequence of the parts to ensure the sealing performance and operational flexibility of the valve.
Detection and test:
The assembled valves are inspected, including appearance inspection, size inspection, sealing performance test, strength test, etc.
The use of advanced testing equipment and test equipment to ensure that the performance of the valve meets the design requirements.
Surface treatment:
According to the need, the valve surface treatment, such as spraying anti-corrosion paint, galvanized, etc., to improve the corrosion resistance of the valve.

Delivery and acceptance

Pre-acceptance preparation:
Confirm the valve purchase contract and technical specification, prepare the necessary testing tools and acceptance documents, such as acceptance list, quality standards, etc.
Appearance inspection:
Check the valve surface for scratches, corrosion, cracks and other damage.
Confirm that the valve model, specification and material are consistent with the order requirements, and check whether the valve mark is clear and complete.
Dimensional inspection:
Use calipers, tape measures and other tools to measure the size of the valve, including but not limited to caliber, flange thickness, bolt hole center distance, etc., to ensure compliance with the design drawings and standards.
Sealing performance test:
According to the type of valve, the corresponding sealing test, such as air tightness test or water pressure test, verifies whether the sealing performance of the valve under the specified pressure is up to standard.
Functional verification:
For valves with actuators, it is necessary to verify whether the switching operation is flexible, whether the indication is accurate, and whether the control system such as electric control and pneumatic control is normally responsive.
Data review:
Check the quality certificate, certificate, factory test report and other technical documents attached to the valve are complete, true and effective.
Storage records:
After all the inspection items are qualified, fill in the warehouse receipt and record the date, storage location, batch number and other information of the valve.
Move the valve to the designated warehouse area for storage and keep it properly.
System input:
The acceptance results and warehousing information of the valve are entered into the inventory management system to achieve information management of materials and facilitate follow-up tracking and invocation.

After-sales service

After-sales service is an important link in the process of commodity sales, which covers a series of service activities after the sale of goods, including but not limited to product introduction, delivery, installation, commissioning, maintenance, technical training, on-site service, telephone consultation, complaint handling, etc. High-quality after-sales service can enhance the reputation of enterprises, enhance consumer satisfaction and loyalty, so as to expand the market share of products, improve the competitiveness of enterprises.