01 flat gate valve
Flat plate gate valve use occasions:
(1) oil, natural gas transmission pipeline, flat plate gate valve with guide hole is also easy to clean the pipeline.
(2) refined oil transmission pipeline and storage equipment.
(3) Oil, natural gas mining port device.
(4) Pipelines with suspended particles.
(5) City gas transmission pipeline.
(6) water works.
Flat gate valve selection principles:
(1) oil, natural gas pipeline, choose a single gate or double gate flat gate valve. If you need to clean the pipeline, use a single gate with a guide hole open stem flat gate valve.
(2) refined oil pipeline and storage equipment, the use of non-guide hole of the single gate or double gate gate valve. (3) oil, natural gas mining port device, the use of concealed rod floating seat with a guide hole in the single gate or double gate gate valve.
(4) with suspended particles in the pipeline, the knife-shaped flat gate valve.
(5) city gas pipeline, use a single gate or double gate soft sealing open stem flat gate valve.
(6) water works, the use of single- or double-gate without guide hole open-stemmed flat gate valve.
2 wedge gate valve
Wedge gate valve application occasions: in various types of valves, gate valve is a widely used *, it is generally only applicable to the full open or full closed, can not be used for regulation and throttling.
Wedge gate valve is generally used in the external dimensions of the valve does not have strict requirements, and the use of harsh conditions. Such as high temperature and high pressure of the working medium, the requirements of the closing parts to ensure long-term sealing.
Usually, the use of conditions or requirements for reliable sealing performance, high pressure, high pressure cut-off (differential pressure), low pressure cut-off (differential pressure), low noise, cavitation and vaporisation, high temperature media, low temperature (deep cold), the recommended use of wedge gate valve. Such as the electric power industry, petroleum refining, petrochemical, marine petroleum, urban construction of water works and sewage treatment works, chemical and other fields in the application of more.
Selection principles:
(1) the requirements of the valve fluid characteristics. Small flow resistance, strong flow capacity, good flow characteristics, sealing requirements of the working conditions of the gate valve.
(2) high temperature, high pressure media. Such as high pressure steam, high temperature and high pressure oil.
(3) low temperature (deep cold) medium. Such as liquid ammonia, liquid hydrogen, liquid oxygen and other media.
(4) low-pressure large calibre. Such as water works, sewage treatment works.
(5) Installation location: when the installation height is limited by the use of dark rod wedge gate valve; when the height is not limited by the use of open rod wedge gate valve.
(6) can only do full open or full shut-off, can not be used for regulating and throttling occasions, in order to choose a chisel gate valve.
