What is the industry's quality experience with Siemens valves such as butterfly, globe, and control valves? In one of my 13-year-old buildings with centrifugal chilled water systems, I observed that almost all of the Siemens motorized isolation butterfly valves are not sitting properly when they receive signals to close chilled and condenser water. Water can flow through 5 to 10% of the openings. Almost all Siemens valves behave in this manner. As a result, it was an operational failure. The BMS system has been improved, and a valve maintenance plan has been developed. One valve was disassembled and dismantled. However, the valve disc is rusted, and the disc side is damaged, which I believe is due to cavitation. Because it is a small percentage, it is constantly open, even when the power is turned off. Cavitation will happen. My question is concerning the dependability of valve manufacturers. When purchasing valves, it is normally advisable to go to the original manufacturers whose major business is producing valves, with the exception of Siemens and Honeywell, which do not have factories that produce valves and instead have valves built for them by third-party Chinese firms. This is being discussed in the industry. I don't know anything else about it. Is this taken into account when ordering valves, particularly for major projects? What is your professional opinion? Thank you for any feedback.
The problem with the world is that intelligent people are full of doubts, while stupid ones are full of confidence.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so itâ€™s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now