Valve Design Procedure

1. Basic content of Lined Valve design
As an important part of the pipeline system, the valve should ensure safe and reliable implementation of the use requirements of the pipeline system for the valve. Therefore, the valve design must meet all the requirements of the working medium in terms of pressure, temperature, corrosion, fluid characteristics, and operation, manufacturing, installation, and maintenance.
The valve design must clearly define the given technical data, namely the "design input", on which the design can be correctly completed.
The basic data that the valve "design input" must have:
1) The purpose or type of the valve;
2) The working pressure of the medium;
3) The working temperature of the medium;
4) The physical and chemical properties of the medium (corrosiveness, flammability and explosiveness, toxicity, physical state, etc.);
5) Nominal diameter;
6) Knot length;
7) Connection form with the pipeline;
8) The operation mode of the valve (manual, gear drive, worm gear drive, electric, pneumatic, hydraulic, etc.).
The data and technical requirements that should be mastered in the valve technical design and working drawing design are:
1) Valve flow capacity and fluid resistance coefficient;
2) Valve opening and closing speed and opening and closing times;
3) Drive device energy characteristics (AC or DC, voltage, air pressure, etc.);
4) Valve working environment and maintenance conditions (whether it is explosion-proof, whether it is tropical climate conditions, etc.);
5) Dimensional restrictions;
6) Weight restrictions;
7) Earthquake resistance requirements.
2. Valve design procedure
1. Design and development planning
1) Design and development stage;
2) Review, verification and confirmation activities suitable for each design and development stage;
3) Responsibilities and authorities for design and development.
2. Design and development input
1) Functional and performance requirements:
2) Applicable legal and regulatory requirements;
3) Information provided by previous similar designs;
4) Other requirements necessary for design and development.
3. Design and development output
1) Meet the requirements of design and development input;
2) Provide appropriate information provided by procurement, production and service;
3) Include or reference product acceptance criteria;
4) Specify product characteristics necessary for product safety and normal use. 4. Design and development review
1) Evaluate the ability of design and development results to meet requirements;
2) Identify any problems and propose necessary measures.
5. Design and development verification
1) Change the method for calculation;
2) Compare with proven similar designs;
3) Test and demonstrate.
6. Design and development confirmation
Confirm in the form of product identification.
7. Design and development changes.