A discussion on large-diameter stop valves
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I’ve received another order this time; the valve specifications are: globe valve J41H-600LB-20, and it’s required that a positive flow direction (low in, high out) be used! / STD-BS 1873 / BODY&BONNET: WCB / TRIM 1# It was done previously in the forward flow direction, but leakage occurred during pressurization; there was nothing that could be done about it! ! After many setbacks, they ultimately gave up and switched to the reverse flow method. I would like to ask those who have experience working on high-pressure, large-size straight-through globe valves to discuss where the key technical challenges lie! Looking forward to improving together! !
Hehe, why isn’t there any response when I try to add you on QQ? A 20-inch valve with a capacity of 600 pounds, designed with flow from bottom to top – I’ve never worked on something this large before; I have experience with valves where flow is from top to bottom. I think that for a valve of this size, if it’s designed to have flow from bottom to top, it places quite a strain on the valve seat, the valve disc, and the valve stem; it’s difficult to ensure that all these components have sufficient strength. Additionally, transmitting such high forces also poses challenges for the actuator used to operate the valve. . . As for how to consider each issue in a thorough and targeted manner, given our limited capabilities, we don’t dare to show off. . . I’m quite interested in participating in your discussions though. . .
Reply to 2# Gardener: lol I don’t even use QQ at work
Reply to 2# Gardener: That’s correct; the drives were all damaged at that time, and 2 copper nuts were replaced! The valve seat cannot be manufactured; the body is made directly.