Which company is strong in regulating valves?
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Dear marine friends, could you tell me which brand of hydrogen high-pressure valves is good? What are their advantages and disadvantages? Domestic; not imported!
Hydrogen high-pressure valves from Lan Lian, excellent quality in Shanghai
We’re using Kaisiton’s version; I’m not sure how it is. Those who have used it, please share your feedback
Valves such as Langao, Dagao, Zhonghe, and Sufa generally have average quality; it is recommended to use those from foreign manufacturers
Look at which process location it’s used in – what are the pressure and temperature conditions? I can help you get in touch if needed!
We use the zirconia ceramic ball valves from Yantai Jintaimelin; the ball core has a V-shaped design, allowing for proportional adjustment with high precision.
Samson, Workwear, Fisher, Foss, Mersonilan – choose any one
In my opinion, the most important aspect of selecting a control valve is proper modeling. If this step isn’t done correctly, it’s hard to imagine how such a valve can function properly. Many valve manufacturers in China don’t conduct thorough calculations of the CV value or verify the appropriate operating range; instead, they make their choices based on the diameter provided by the customer or the parameters indicated on the original valve. It’s surprising then if no problems arise with such valves. It’s also irresponsible to sell or purchase a valve without first ensuring that it can meet the actual requirements for adjusting the opening degree in the actual operating conditions. Next are the product processing techniques, as well as the transfer and allocation technologies. How can such products be of good quality if their processing is rough and the workers assemble them carelessly? Next are testing and after-sales service. I think testing is a necessary process in factories, but many companies fail to carry it out, resulting in serious internal and external leaks of the valves once they arrive at the site. Regarding after-sales service, I think whether the products are imported or domestically produced, can you guarantee that there won’t be any problems during installation on-site or during online debugging? Any issues should be resolved immediately; don’t shift responsibility – if it’s your fault, you should reflect on it. I don’t recommend which one is good and which one is bad; what’s suitable for oneself is the most important. These days, the same valve under the same operating conditions can yield different performance results~~~~~It’s just my personal opinion; please correct me if I’m wrong
1. Large-diameter control valves, in particular, have a throat diameter that is much too small; as a result, they are unable to achieve maximum flow rates when dealing with very high flow volumes. 2. For controlling low flow rates, the CV value of such valves is too low, and the valve spool cannot be positioned accurately – either the flow rate is sufficient as soon as the valve is opened, or there is little actual flow even after it has been opened. 3. When it comes to precise flow regulation, domestic manufacturers are indeed not as good at this as foreign manufacturers. But this does not mean such valves cannot be used; many manufacturers use imported accessories such as positioners, pressure regulators, and solenoid valves. The difference lies in the valve body and the assembly process