Comparison between Yamaku intelligent positioners and Siemens intelligent positioners
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Hello, colleagues! For pneumatic valves, should one choose a Yaskawa actuator or a Siemens actuator? I have not used Siemens actuators before; I would appreciate it if experts could help analyze this issue.
It seems that Yamaki uses it more often, but the products must be genuine; otherwise, there’s no way to make a comparison!
Siemens positioners don’t perform well in cold environments. In Xinjiang, when winter comes, the Siemens units outside stop working properly, so we replaced them all; Yamatake units are more durable
Mm-hmm, it’s said online that Siemens positioners experience surge phenomena; I’ve used them personally. I still think Yamaki is the best!
Siemens’ and Yamatake’s principles are different; one relies on piezoelectric valves while the other uses nozzle baffles. Siemens positioners cannot be used in critical applications, as they will fail after just one year of use. It’s impossible to use it automatically, and it also affects operational conditions.
The electrical conversion components of Siemens Chuanyi intelligent positioners use piezoelectric valves, which are presumably manufactured by German company Holbig. There seemed to be some problems in the past; during a project in Xinjiang, oscillations occurred in winter. The number of such issues was small, so it’s not certain whether this was a common problem. . . FISHER, SAMSON: The electrical conversion components of AZBIL’s intelligent positioners use nozzle-throttle types; FISHER, SAMSON uses them quite frequently, and no common problems have been encountered
Calibrating Siemens positioners is not as simple as that with Yaskawa; for Yaskawa, it is only necessary to determine the air pressure and whether the control valve operates in an open or closed mode.
It seems that intelligent valve positioners all use piezoelectric valves, while those with nozzle baffles are mechanical, right? If you don’t fully understand Siemens positioners, it’s difficult to deal with even minor faults; we mainly work with Siemens products here. This phenomenon occurs when it is in a surge condition; it is said to happen due to leaks in the air path.
If there is a leak in the air supply of a Siemens positioner, or if valve position deviations occur after long-term use, which can lead to surging, it will be sufficient to let it return to its normal operating range automatically. Using Siemens in important applications can lead to problems; high operating temperatures in steam pipelines, combined with prolonged use, can also cause fluctuations in the readings of the regulators
Do not use Siemens positioners; the piezoelectric valves often break.