Zhengzhou Success Machinery Co.,ltd - Professional valve manufacturer
News Center
One-stop Solution for Valve Products
News Events
Latest News
How to control the product quality of the valves
Release time:
May 02,2024
In the manufacture of valves，Quality control is very important, The quality control runs through the entire process of valve production. A loss of control in any of these areas will creates a potential risk to the quality of the valve. For valve manufacturers, our product quality control is not only to do a good job of quality control within their own factories, but also pay attention to the quality control of raw materials manufacturers, such as castings. This article describes is that how Zhengzhou Success Machinery CO.,LTD implements quality control in the production of valves.
In the manufacture of valves，Quality control is very important, The quality control runs through the entire process of valve production. A loss of control in any of these areas will creates a potential risk to the quality of the valve. For valve manufacturers, our product quality control is not only to do a good job of quality control within their own factories, but also pay attention to the quality control of raw materials manufacturers, such as castings.
This article describes is that how Zhengzhou Success Machinery CO.,LTD implements quality control in the production of valves.
The starting point for quality control is the foundry's quality control of the casting material.：
First. The foundry has to test the raw materials for casting, such as pig iron, scrap steel, and so on. It is important to assay their chemical content to ensure that it is within the standard requirements.
Secondly, the humidity and strength of the sand used for casting should be tested to ensure that the castings are dimensionally qualified.
Castings to the valve manufacturer：
The first is to check the appearance, whether there are casting defects, such as air holes, sand holes, shrinkage and so on.
Secondly, check that the logo and cast lettering meet the contractual requirements.
Thirdly, the body test piece is assayed to see if it can reach the required level of spheroidization. Zhengzhou Success Machinery CO.,LTD requires all castings to have a spheroidization level of three or higher.
Fourth, test the bar of tensile t test to ensure that the tensile strength meets the appropriate material requirements.
Fifth, in the whole process of machining, after the completion of each process, the quality inspector should measure the machining accuracy according to the drawings to ensure that it is within the tolerance.
Sixth, before coating, all parts that need to be coated should be shot-blasting to increase adhesion.
Seventh, testing the coating thickness and color to ensure compliance with customer contract requirements.
Eighth, the shell strength and sealing test should be carried out in accordance with the standard, with the shell tested at 1.5 times the design pressure and the sealing at 1.1 times the design pressure.
Ninth, clean up the appearance, get rid of the spoils that it produced in the process of test pressure and transit, then keep the valve clean.
Tenth, appropriate packaging to ensure safe transportation and compliance with relevant transportation regulations.
keywords
Follow Us
Zhengzhou Success Machinery Co.,ltd
TEL:+8618595868771
E-mail:sales@successmach.com
Address:98-1 Dengfeng Road, Shangjie District, Zhengzhou City, Henan Province