This paper is a research report on globe valve. There are six tasks being solved for this research.
Table of Contents
Introduction:
Globe valve made of stainless steel
Figure 1
Specification of the globe valve:
Solid model of globe valve
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Market (customer) requirement and procedures used in survey
Procedures used for customer survey
Evidence of market survey method used:
Customer survey (survey evaluation):
Analysis:
Figure 15
Customer requirements and engineering specifications.
List of customer requirement and engineering specification
Relationship between customer requirement and engineering specification
Relation of “HOW” and “WHAT”:
Develop and present QFD matrix with customer requirement and engineering specification.
Introduction of Quality Function Deployment:
Development of house of quality (HOQ)
Table : House of Quality (HOQ) for the selected globe valve:
Result of the house function design (HFD):
Conclusion of the QFD matrix:
Development of conceptual designs:
Concept A Figure 16
Concept B Figure 17
Concept C Figure 18
Concept D Figure 19
Select and justify the best concept using appropriate design evaluation methods.
Final summation of the best design from Pugh evaluation.
Design for manufacture and assembly of a globe valve (best design):
Objectives & Themes
This work aims to optimize the design of a globe valve through a systematic product development approach, focusing on enhancing performance, reliability, and cost-effectiveness based on customer feedback and engineering analysis.
- Market research and customer requirement analysis
- Application of Quality Function Deployment (QFD) and House of Quality (HOQ)
- Conceptual design development and evaluation using Pugh methods
- Design for Manufacture and Assembly (DFMA) implementation
- Technical specification and performance optimization
Excerpt from the Book
CONCEPTUAL DESIGN (GLOBE BODY)
The globe body is the end part of the globe valve which is assembles with bolt and nut to the bonnet. In this concept the flanges were redesigned from a circular 8 holes bolt and nut fastening assembly to a rectangular 4 holes bolt and nut fastening for easy assembly and disassembly, thereby reducing cost of materials, weight of the product. The main part of the globe body is redesign to smaller shape and from circular to rectangular shape, thereby reducing the cost of material, size and weight of the product. The material used for the valve body and bonnet in this concept is a Carbon steel.
Summary of Chapters
Introduction: Describes the fundamental operation and applications of globe valves in various industrial processes.
Specification of the globe valve: Outlines the physical dimensions, material composition, and functional characteristics of the selected valve model.
Market (customer) requirement and procedures used in survey: Details the methodologies used to gather user feedback and identifies key industry requirements.
Customer survey (survey evaluation): Presents the statistical analysis of data collected from 50 industry users regarding their priorities for valve improvement.
Customer requirements and engineering specifications: Translates the "Voice of the Customer" into technical parameters and performance standards.
Relationship between customer requirement and engineering specification: Establishes the link between desired product features and the engineering methods required to achieve them.
Develop and present QFD matrix with customer requirement and engineering specification: Introduces the Quality Function Deployment framework and the House of Quality matrix to prioritize development efforts.
Result of the house function design (HFD): Calculates the improvement ratios and relative weights of technical specifications based on customer-driven criteria.
Conclusion of the QFD matrix: Summarizes how the QFD process successfully aligns product development with market demands.
Development of conceptual designs: Proposes four distinct design concepts aimed at improving the existing globe valve structure.
Select and justify the best concept using appropriate design evaluation methods: Applies Pugh evaluation and Scoring matrix techniques to identify the optimal design path.
Final summation of the best design from Pugh evaluation: Consolidates evaluation findings to recommend the most suitable design for future development.
Design for manufacture and assembly of a globe valve (best design): Explores strategies for optimizing the chosen design for easier production and assembly.
Keywords
Globe Valve, Quality Function Deployment, QFD, House of Quality, Product Innovation, Engineering Specifications, Design for Manufacture and Assembly, DFMA, Pugh Method, Customer Requirements, Industrial Design, Mechanical Reliability, Throttling, Process Control, Material Selection.
Frequently Asked Questions
What is the core focus of this study?
The study focuses on the product innovation and re-design of a globe valve to meet specific customer requirements through rigorous engineering evaluation methods.
What are the central themes of the work?
The central themes include market research, technical specification development, Quality Function Deployment (QFD), conceptual design iteration, and Design for Manufacture and Assembly (DFMA).
What is the primary objective of this project?
The primary goal is to redesign an existing globe valve to increase its service life, improve reliability, reduce manufacturing costs, and ensure better ergonomics for maintenance and operation.
Which scientific methods are utilized?
The author uses a systematic approach including customer surveys, the House of Quality (HOQ) matrix, Pugh concept selection, and Scoring matrix evaluation to validate design decisions.
What topics are covered in the main section?
The main section covers the identification of customer needs, the development of conceptual models, the application of QFD to prioritize technical features, and the implementation of DFMA guidelines to optimize the final product.
What characterizes this product development process?
The process is characterized by being "customer-driven," ensuring that every technical adjustment, such as reducing the number of fasteners or changing materials, directly addresses a specific user-identified problem.
How did the author define the "Improvement Ratio"?
The improvement ratio is calculated in the QFD matrix by comparing the planned market rating for the new design against the market rating of the existing globe valve.
Why was the "Pugh method" chosen for concept evaluation?
The Pugh method was chosen as a structured decision-making tool to compare multiple design concepts against a datum (the existing product), allowing the team to select the best concept based on the highest number of favorable criteria.
How does the redesign impact the valve's manufacturing cost?
By simplifying the flange design (changing from 12 to 4 bolts) and utilizing standardized materials, the project aims to reduce assembly time and overall material costs, targeting a price reduction of approximately $50 per unit.
What role does the "Voice of the Customer" play in this research?
It serves as the foundation for the entire project, ensuring that the engineering efforts—such as improved locking mechanisms and enhanced corrosion resistance—are directly aligned with the actual demands of industrial end-users.
- Quote paper
- Orakwelu Nzube Cliff (Author), 2013, Research report on globe valve. Product innovation, Munich, GRIN Verlag, https://www.grin.com/document/976480
