Use of valves in hydrogen pipelines
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This post was last edited by simjoy on 2010-9-6 07:58. Why should ball valves and globe valves be used for the valves in hydrogen pipelines? Gate valves must not be used when the operating pressure is greater than 0.1 MPa. ”Please give me some advice.
Globe valves feature good sealing performance, low fluid resistance, and certain regulating capabilities. However, its sealing surface wears out easily, it is difficult to maintain, and the opening and closing time is long; therefore, this valve is not suitable for hydrogen pipelines.
Ball valves and globe valves have good sealing properties, and their sealing surfaces are not prone to damage. Personally, I think ball valves are convenient to operate as they allow for quick shut-off; am I correct? Please give me some advice, Fang!
Gate valves have poor pressure resistance, and hydrogen is a hazardous substance; therefore, gate valves cannot be used.
Gate valves are generally used for materials with low or no hazard, and their sealing performance is somewhat poor
This post was last edited by lyhh9024 on 2010-9-6 at 11:44. Reply: When a gate valve is closed, sparks can easily be generated due to the impact between the valve stem and the valve seat!
1. The gate valve has poor sealing properties. 2. Static electricity is generated easily during the up and down movement of the gate valve; sparks may occur if grounding screws are not installed on the side flanges. 3. The opening and closing distance of the gate valve is large, which can cause significant wear to the seal