May I ask what the difference is between BB and PS valves?
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What is the difference between a valve’s BOLTED BONNET and a PRESSURE SEAL BONNET? It seems that the main cover of a valve is always bolted
BB – Bolted valve cover; PS – Pressure self-sealing valve cover
Hehe, I learned it. Our company manufactures flanges. When valve companies need flanges for their products, they don’t know what to do; it seems they need to learn more about valve knowledge.
Valve cover: BP-BOLTED BONNET – valve cover connected by bolts; PS-PRESSURE SEAL BONNET – valve cover with pressure-based self-sealing
Is a pressure self-sealing valve cover a valve cover that doesn’t require bolts for sealing? Could you be more specific?
BP-BOLTED BONNET: Valve cover connected by bolts. PS-PRESSURE SEAL BONNET: Valve cover with pressure-based self-sealing. This type of valve cover achieves sealing by moving the self-sealing seat upward under pressure, thereby compressing the self-sealing ring; it is generally used in applications with high pressures to facilitate effective sealing. Generally, the limiting mechanism for the self-sealing ring at the top uses a four-loop design, while those with smaller diameters sometimes employ threads. This post was last edited by Gardener on 2009-3-28 17:22]
Pressure self-sealing is referred to as the Wood-type sealing structure in GB150. Just take a look at this standard and you’ll know.
Oh, actually it’s still held tight by bolts; there’s just an additional sealing mechanism inside the valve body. Thank you