I. Features of ZJW Dedicated Feed Pump for Filter Press

1. Innovative Design: Novel hydraulic and structural design ensures high efficiency, abrasion resistance, and stable, reliable operation.

2. Dual-Stage Performance:

• Early-stage feeding: Delivers large flow rate and low pressure.

• Late-stage pressing: Provides small flow rate and high pressure.

3. Reliable Shaft Seal: Simple and reliable shaft seal requires no water injection or mechanical seal, ensuring zero leakage.

4. High Concentration Handling: Eliminates the need for variable frequency speed regulation during filter press feeding, enabling high-concentration material transportation.

II. Brief Description of ZJW Dedicated Feed Pump for Filter Press

The ZJW dedicated feed pump for filter presses draws slurry from the rear side and employs a simple packing seal without leakage. Its steep flow-head curve makes it ideally suited for filter press applications.

Selection of ZJW Dedicated Feed and Pressurizing Pump for Filter Press:

• The main technical parameters listed for the ZJW pump are based on operation at 1480 revolutions per minute (r/min). For low-pressure requirements, adjustments can be made by appropriately trimming the impeller or reducing the pump speed. Additionally, our factory’s ZJ series slurry pumps can be selected, which feature the same "leak-free" mechanical seal as the ZJW-II pump.

• This document provides foundation dimensions for direct-drive transmissions only. For belt-drive configurations requiring different dimensions due to terrain limitations or speed adjustments, specific on-site data must be provided for custom design. Common belt-drive methods include tail frame type, parallel type, and back support type.

The ZJW pump is a pressurized suction pump with a limited suction lift. It is recommended that the feeding liquid level be higher than the pump’s centerline. The diameters of the inlet and outlet pipelines are generally the same as or slightly larger than the pump’s ports. Given the typically high slurry concentration, the inlet pipeline should not be excessively long to avoid affecting suction performance.

III. Selection of ZJW Dedicated Feed Pump for Filter Press

The selection of the ZJW pump differs significantly from general conveying pumps. For general pumps, selection focuses on a specific point or short segment of the flow-head curve. However, the filter press operates with a gradually forming filter cake in the chamber, leading to increasing feeding resistance. The feed pump must transition from high flow and low head at the start to low flow and high head at the end of filtration. This requires a pump with a long, preferably steep flow-head curve. Additionally, the pump must operate under high pressure without shaft seal water and with zero leakage, facilitating the establishment of environmentally friendly facilities.

IV. Power Configuration of ZJW Dedicated Feed Pump for Filter Press

The maximum power consumption of the feed pump occurs during the initial feeding stage. Therefore, it is crucial to calculate the minimum pressure required to inject slurry into the filter press and select the pump power based on the corresponding flow and head at this minimum pressure. This approach ensures accurate and energy-efficient power configuration.

Due to variations in the actual layout of filter press systems across factories, significant frictional resistance in the pipeline between the feed pump and filter press (e.g., long pump-to-filter distance, undersized pipes, numerous elbows and valves, high slurry viscosity) can increase head loss, reduce cake-forming pressure, and lead to higher moisture content in the filter cake and prolonged cycle times. To maintain system efficiency, proper pipeline configuration is essential.

Due to the wide variety of product specifications and models, our company provides only partial parameters. For more detailed information, please contact our technician at 182-3296-2233.