The difference between the dark-rod gate valve and the open-rod gate valve is as follows:

1. The height of the dark bar gate valve is smaller than that of the light bar. Compared with the mounting space, it is suitable for some places with limited space.

2. Open stem gate valve can see the stem, but not the dark one.

3. The open stem gate valve controls the rise and fall of the gate valve through the screw between the stem and the steering wheel, while the valve stem of the dark rod is fixed together with the gate plate. It drives the valve disc up and down through the fixed position of the stem.

4. The driving thread of the dark rod gate valve is inside the valve body, so it is not easy to observe the opening height when moving, while the open rod gate valve is clear at a glance.

5. The structure of open-rod gate valve is conducive to the lubrication of stem, with obvious opening and closing, while the dark-rod gate valve cannot be lubricated. Against dark stem gate valves.

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