SIL valve with handwheel
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Dear seniors: I have a question. Recently, there was a tender for a batch of control valves to be used in low-temperature methanol washing processes. One of the control valves in that set requires an overall SIL level of 1, and it is also necessary to have a handwheel attached to it. Some manufacturers claim that SIL1 is certified, but the actuators equipped with handwheels are not certified. I would like to know: do all devices that have an SIL certification not allow the use of handwheels? Thank you.
That’s not what I meant. They just didn’t go through the certification for those cylinder diaphragm heads with hand wheels. Whether to include a handwheel depends on the user’s requirements; if you really need it, then switch to another manufacturer. There’s no need; it doesn’t matter whether it’s included or not.
Hey, we specialize in SIL certification; I was wondering if you might be interested
Normally, the valves used in SIS systems should not have handwheels
HG/T 20507-2014 Specifications for the Selection and Design of Automated Instruments 11.9.7 For control valves of process safety interlocks used to shut off valves in emergency situations, a handwheel mechanism shall not be provided.
Hehe, this process package needs to be updated. Valves used for interlocking must not have handwheels
Hello, our valve factory is located in Wuxi, Jiangsu. Our cut-off valves have obtained the Sil3 certification from the German TUV certification body; feel free to contact me at hyvhzj666@163.com if you are interested
Chemical engineering codes require the absence of handwheels, while petrochemical engineering codes permit their use.