Feature: 1.Cartridge mechanical seals can replace packing without changing other devices; 2.Many small springs will not contact with medium directly thus reducing the risk of blocking and corrupting; 3.The O-Rings are designed for non-axial motion thus reduce the failure caused by O-ring. Technical Parameters: Max Pressure: 25kg/cm Max Temperature: 220 centidegree(for Viton O-rings) 327 centidegree(for Kalrez O-rings) Speed: 20m/s Application: Water system, Oil system Shaft:25-120mm(diameter) 1"-4"(diameter)