The Powder Pump is a versatile and efficient solution for transferring powders in a contained, dust-free manner. Below we’ve answered some of the most common questions we receive about its operation, capabilities, and design.
Q: What is the maximum transfer distance and vertical lift capability?
A: Ultimately, it depends on the product being transferred. For most free-flowing materials, transfer distances are typically 100 ft. or less. Vertical lifts of 15–20 ft. are common, with 30 ft. being the maximum. In cases where 30 ft. of lift is required, we may recommend breaking up the vertical leg into two separate sections for optimal performance.
Q: What is the transfer rate of the Powder Pump system?
A: The Powder Pump operates as a volumetric device, filling and emptying a set volume each cycle. Systems generally run at a minimum of two cycles per minute. Typical volumetric rates are:
- 4” Powder Pump: 15 ft³/hr
- 6” Powder Pump: 40 ft³/hr
- 8” Powder Pump: 65 ft³/hr
- 12” Powder Pump: 150 ft³/hr
By multiplying the volumetric rate by the bulk density of your powder, you can estimate mass flow rate.
Example:
- Pump size: 6”
- Bulk density: 45 lb/ft³
40 ft³/hr (volumetric rate) × 45 lb/ft³ (bulk density) = 1,800 lb/hr (mass flow rate)
Q: What types of products can be handled?
A: The system performs best with dry materials of uniform particle size. Examples include pellets, prills, and powders such as Chromic Acetate, Aluminum, salts, and acids.
Challenging materials include:
- Titanium Dioxide (very cohesive)
- Fibrous or stranded products (high bridging potential)
- Large lumps or clumps (unless processed through a size-reduction device first)
As a general rule: if the powder is dry with a narrow particle size distribution, it will transfer well.
Q: Can the Powder Pump system be portable?
A: Yes. De Dietrich has designed several cart-mounted arrangements for the Powder Pump. Mobile versions are engineered to keep weight down and reduce the number of utility connections required. [Read our blog post on mobile units for more information.]
Q: What is the nitrogen consumption of the Powder Pump System?
A: Consumption varies depending on discharge settings. For a typical system using only a suction lance, nitrogen usage depends on how long the outlet valve remains open per cycle. Normal settings fall between 4–6 seconds.
Example:
- Charge time: 30 minutes
- Charges per minute: 2
- Nitrogen flow: 15 cfm
- Discharge timer: 4 sec
Step 1: Total discharge time over batch
30 min (charge time) × 2 (charges/min) × 4 sec (discharge timer) = 240 sec (4 min) total discharge time
Step 2: Nitrogen consumption
4 min (total DT) × 15 cfm (nitrogen flow) = 60 cu. ft. (nitrogen usage)
Q: What are the standard materials of construction?
A:
- Hard materials (wetted parts): 316L Stainless Steel or Hastelloy® (C-22 or C-276, depending on availability)
- Soft materials (wetted parts): Teflon®
Q: Can I use an existing vacuum pump?
A: Yes, an existing vacuum source can often be used. De Dietrich will supply the recommended flow and pressure requirements to verify compatibility. Keep in mind: consistent vacuum supply is critical for reliable operation. If your house vacuum is inconsistent, a dedicated stand-alone pump may be necessary.
Q: Can I supply my own control system?
A: Yes. While De Dietrich typically provides the complete package, we understand there may be cases where customers want to handle programming themselves. We can provide a functional specification with our recommended operating parameters.
For larger systems, however, we strongly recommend allowing De Dietrich to furnish the control system. If needed, our system can be designed for easy integration with your plant DCS (Distributed Control System).
Final Thoughts
The Powder Pump system offers a reliable, contained, and efficient way to transfer powders across a wide range of applications. From understanding transfer rates and material compatibility to exploring options for portability and control, these FAQs highlight the flexibility and performance the system can deliver.
If you’re looking for a safer, cleaner, and more effective way to handle powders in your process, De Dietrich can help. Our team will work with you to evaluate your application and design a solution tailored to your specific requirements. Contact us today to discuss your powder handling needs and discover how the Powder Pump can improve safety and efficiency in your operation.
