Specifications for valves with Gear operator
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This post was last edited by security on 2011-8-2 at 15:01. Generally, valves larger than 6 inches are required to be equipped with a Gear operator – which specification specifies this? That’s how foreigners write it: Manual valves that require an opening or closing force of 400N or more will be supplied with a gear operator. I’m not sure what the basis for this is
This may not be solely related to standards; Gear refers to a gear mechanism. Generally, it is relatively difficult to manually open valves that are larger than 6 inches; using a gear mechanism can help reduce the effort required. As for the standards, they may also be required to ensure operational safety. The purpose is to facilitate the initiation of operations.
There’s no specific standard; we use handles for DN200, and for larger sizes, we use gear boxes :victory:
Valves of American standard generally come equipped with actuators such as gears for sizes of 6 inches and above, while those of domestic manufacture usually have such actuators for sizes of 8 inches and above
Gearboxes are used for manual valves of 6\" and above, while handles are used for those of 4\" and below; this is just a common practice and not a mandatory requirement. There are also 4\" valve gearboxes, which make it easier to open and close them.
Support the opinion from the 4th floor! Usually, various regulations are formulated after taking many factors into consideration, so it’s best for us to design based on them
This is practical experience; there are no rules.
So that’s what a gear operator means.
Is the gate valve with a diameter of DN350 at our site still operated manually, while gear operators are used starting from DN150? That’s quite advanced
Reply to 8# wingman1985: Could you tell me what the two terms “gear operator” actually translate to? Thank you all!
Here we usually call it a GEAR BOX – a gearbox; it’s probably the same thing