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Principles for selecting globe valves
Principles for selecting globe valves：
1. Globe valves should be used on pipelines or devices for high-temperature and high-pressure media. High temperature and high-pressure pipelines in thermal power plants, nuclear power plants, and petrochemical systems.
2. On pipelines with lax flow resistance requirements. Places where pressure loss is not given much consideration.
3. Small valves can be selected from needle valves, instrument valves, sampling valves, pressure gauge valves, etc.
4. There is flow regulation or pressure regulation, but the requirement for regulation accuracy is not high, and the pipeline diameter is relatively small, such as on pipelines with nominal diameter ≤ 50mm, it is recommended to choose.
5. Small and large fertilizers in synthetic industry production should use high-pressure angle globe valves or high-pressure angle throttling valves with nominal pressure PN160 and nominal pressure 16MPa or PN320 and nominal pressure 32MPa.
6. In the desilication workshop and coking prone pipelines of alumina Bayer process production, it is easy to choose DC globe valves or DC throttling valves with separate valve bodies, removable valve seats, and hard alloy sealing pairs.
7. For water supply and heating projects in urban construction, shut-off valves, balance valves, or plunger valves can be used for pipelines with a nominal diameter of less than 150mm.
During the opening and closing process, the friction between the valve disc and the sealing surface of the valve body is smaller than that of a gate valve, making it wear-resistant. The opening height is generally only 1/4 of the diameter of the valve seat channel, so it is much smaller than gate valves. Usually, there is only one sealing surface on the valve body and disc, so the manufacturing process is relatively good and easy to maintain.
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