ZE Series Petroleum & Chemical Process Pumps

ZE Series Product Introduction

ZE-type chemical process centrifugal pump, designed and manufactured in accordance with API 610 and VDMA 24297 (light/medium) specifications. Capable of transporting various temperatures and concentrations of sulfuric acid, inorganic acids, and organic acid solutions; various temperatures and concentrations of alkaline solutions such as sodium carbonate; various salt solutions; various liquid petrochemical products, organic compounds, and other corrosive liquids. This type of pump is suitable for refineries, petrochemical coal processing projects, low-temperature engineering, papermaking, sugar production, water supply plants, desalination plants, power plants, environmental protection projects, and shipbuilding industries. From the motor end, the pump rotates in a clockwise direction.

This type of chemical process utilizes standard piping designed according to API specifications. The impeller is available in three types: closed, semi-open, and open. It can transport clean, particulate, and medium containing a small amount of gas. It can also handle high-temperature, low-temperature, and highly corrosive media. The impeller features balancing holes and corrosion-resistant rings to counteract axial forces. The pump housing and bearing housing are connected by an intermediate section. Depending on the operating conditions, the intermediate section can be made of different materials to prevent severe corrosion of the bearing housing and bearings when transporting highly corrosive media. Additionally, the intermediate section is equipped with a water-cooling chamber that circulates cooling water, preventing high-temperature media from transferring heat to the bearings. The sealing can be accomplished with packed gland, single or double-end mechanical seals, or integrated single-end mechanical seals. Based on different conditions and user requirements for cooling and flushing, the seals can be selected from the API 682 design specification. The bearing housing design includes air-cooled fins, forced-air fans, and water-cooled chambers, allowing the user to choose according to the operating conditions. The bearings are lubricated by splash oil from the oil sump. The oil in the sump is cooled by the water in the cooling chamber, and the heat within the bearings is carried away by the cold water to ensure the bearings are always in normal working condition. The support type is selected based on the medium temperature and pressure, using either central support or pedestal support. The rated pressure classes of the suction and discharge flanges are the same.