This series of pumps is a direct coupled pipeline centrifugal pump, which adopts the performance parameters of IS and ISR centrifugal pumps and is designed in combination on the basis of a vertical pump; Based on different operating temperatures and media, IRG type pumps and oil pumps are produced that are suitable for warm water, highly efficient and corrosive chemicals. This series of products has the advantages of high efficiency, energy saving, low noise, and reliable performance