Can You Lump Globe Valves & Gate Valves Together?
2021-08-11
答案绝对是否定的!我n Structure, if space is limited Gate valve relies on the medium pressure to tightly seal the surface, so as to achieve the effect of no leakage. When opening and closing, the disc and seat sealing surface are always in contact and rubbing each other,which leads to a worn sealing surface. When the gate valve is about to close, the pressure difference between the front and rear of the pipeline is very large, which also contribute to a more serious the sealing surface damage. The structure of gate valve is more complex than that of globe valve. In terms of the shape gate valveis higher and more narrow than globe valve, assuming they are of same caliber. In addition, stem of gate valve falls into two categories, rising or non-rising, while globe valve’s stem does not. Working Principle Globe valves open and close with a rising stem, which means that when the handwheel is turned, the handwheel moves along with the stem up and down. As for gate valve, the handwheel is turned, stem move up and down, but handwheel itself stays at the same position. Their flow rates vary. Gate valves have to be full opened or closed, while globe valves do not. Globe valves have a defined inlet and outlet direction, while gate valves do not. In addition, the gate valve has only two states: fully open or fully closed,and the long travel of the disc results in a longer switching time.The time a globe vale needs is muchshorter. Most importantly, thedisc of the globe valve can stop at a certain place inthe valve body to do flow regulation. The gate valve can only be used for cut-off and has nosuch function. Performance differences Globe valves can be used for both cut-off and flow regulation. The fluid resistance of globe valve is relatively high, and it takes more effort to open and close, but because the distance between the valve plate and the sealing surface is short, the opening and closing stroke is short. When gate valve is fully open, the medium flow resistance in the valve body channel is almost 0, so the gate valve opening and closingwon’t be very laborious. But the gate plate is far from the sealing surface, opening and closing time is longer. Xiamen Dervos is an API Certified check valve manufacturing and trading company that specializes in the production of various kinds of valve. In addition to all kinds of common valves such as gate valves, globe valves, plug valves and butterfly valve , we also produce otherunconventional valves as long as our customers file their requirements.To learn more about our industry-leading products, contact us today.