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For most chemical drum-pump projects, choose the tube material first, then confirm the required flow, discharge head, viscosity, temperature, container depth and motor environment. The FTI EFP is a compact, economical option for compatible light-duty liquids. The PFP provides higher flow and head in polypropylene construction. The PFV uses PVDF wetted construction for compatible corrosive chemicals that need the PF Series duty range. The chemical name alone is not enough for final selection: concentration and temperature can change material compatibility.
This guide helps engineers and buyers compare the FTI EFP, FTI PFP and FTI PFV before requesting a quotation.
Quick comparison: EFP vs PFP vs PFV
| Series | Best starting point | Tube material | Published maximum duty* | Key selection question |
|---|---|---|---|---|
| EFP | Portable, light-duty transfer of compatible cleaners, coolants, light acids/bases and similar fluids | Polypropylene (PP) | Up to 17 gpm (64 lpm) and 20 ft (6.1 m) head with the listed electric-motor configuration | Is the lower flow/head range sufficient? |
| PFP | Higher-flow container-to-container transfer of compatible treatment chemicals, acids, bases and cleaners | Polypropylene (PP) | Up to 40 gpm (151 lpm) and 80 ft (24 m) head with the listed electric-motor configuration | Is polypropylene compatible at the actual concentration and temperature? |
| PFV | Higher-duty transfer where PVDF is the preferred compatible tube material | PVDF | Up to 40 gpm (151 lpm) and 80 ft (24 m) head with the listed electric-motor configuration | Does the full wetted-material set suit the chemical? |
*These are manufacturer catalogue maxima, not guaranteed operating points. Actual performance depends on the selected motor, liquid properties, tube length, hose, nozzle, fittings and total system resistance.
When the EFP is the practical choice
The EFP is designed as a lightweight, economical alternative to hand pumps for intermittent transfer. Its smaller tube and 3/4-inch hose connection suit jobs where portability and controlled transfer matter more than maximum throughput. Published EFP limits include a maximum specific gravity of 1.6 and, depending on motor choice, viscosity up to 300 cP.
Start with the EFP when the liquid is compatible with polypropylene and the required duty fits the EF Series envelope. It can be a sensible choice for maintenance fluids, cleaners, coolants and other light chemical services. Do not select it only because the fluid name appears on an application list; verify concentration, temperature and every wetted component.
When the PFP offers a better duty range
The PFP is a PF Series polypropylene drum pump with a larger 2-inch tube and 1-inch discharge. The manufacturer lists a double-suction impeller and variable-orifice discharge for higher flow control. With the applicable electric-motor arrangement, catalogue values reach 40 gpm (151 lpm), 80 ft (24 m) head, 1.8 specific gravity and up to 2,000 cP.
Choose the PFP as the starting point when transfer time, a longer hose run, elevation or downstream restriction moves the application beyond the EFP range, while polypropylene remains chemically suitable. For viscous liquids, confirm the motor-specific viscosity limit rather than relying only on the pump-tube maximum.
When the PFV is the safer material starting point
The PFV keeps the PF Series duty concept but changes the tube to PVDF and uses Alloy 625 shaft material in the published configuration. It is intended for compatible corrosive chemical transfer where PVDF offers a better material match than polypropylene. Catalogue temperature information for PFV is lower than for PFP, so material choice must always be checked together with temperature.
PVDF is not a universal answer. Seals, O-rings, shaft, impeller, hose, nozzle and fittings are also wetted components. Ask for a compatibility review using the exact chemical name, concentration, temperature and any cleaning fluid.
Seven inputs that determine the correct drum pump
- Liquid and concentration: provide the full chemical name, mixture percentage and any additives.
- Temperature: state normal and maximum liquid temperature, not only room temperature.
- Flow target: define the desired transfer time for one drum or IBC.
- Total discharge resistance: include vertical lift, hose length and diameter, nozzle, meter, filter and valves.
- Viscosity and specific gravity: use values at operating temperature.
- Container geometry: give drum or IBC size, opening diameter and insertion depth.
- Operating area: identify washdown, corrosive fumes, outdoor use and any classified hazardous-area requirement.
Do not size from maximum flow alone
A maximum-flow number describes one end of a performance curve under defined conditions. Your operating point is where the pump curve meets the resistance of the complete discharge system. Long small-bore hose, elevation, a restrictive nozzle, a flow meter or a filter can reduce delivered flow substantially. Higher viscosity adds more friction and can also change the acceptable motor choice.
For a reliable quotation, tell DFIN the flow you need at the actual discharge head. If the exact head is unknown, provide the container height, destination height, horizontal hose length, hose size and all inline accessories so the duty can be estimated.
Match the motor to the environment and liquid
FTI drum-pump tubes and motors are selected as a combination. Voltage, frequency, speed control, enclosure and available compressed air all matter. A standard splash-resistant electric motor should not be assumed suitable for a hazardous location. Air operation reduces electrical ignition sources, but the entire installation still requires a documented site safety review, correct grounding and a configuration approved for the area.
Never infer an explosion-proof or ATEX rating from the pump family name. Confirm the exact motor model, certification, electrical supply and local compliance requirement on the quotation.
Tube length, hose and accessories affect usability
Select a tube long enough to reach the bottom of the container without forcing the motor or discharge connection against the drum. EFP catalogue lengths range from 16 to 54 inches, while PFP and PFV options extend from 27 to 72 inches. The correct length depends on the container and bung arrangement.
Also specify hose material and length, nozzle type, flow meter, filter, drum adapter, wall hanger and grounding equipment where required. Accessories must match the fluid and can add pressure loss, so they belong in the original sizing calculation.
What affects chemical drum pump price?
Drum pump price depends on the pump-tube series and length, wetted materials, motor type and voltage, hose and nozzle materials, meters or filters, certification requirements and the quantity ordered. A low initial price can become expensive if the selected material swells, cracks or corrodes, or if the pump takes too long to empty each container.
For a useful quotation, compare complete configurations rather than tube prices alone. Include expected duty cycle, spare wear parts and cleaning requirements when evaluating total ownership cost.
Enquiry checklist
- Chemical name, concentration and safety data sheet
- Normal and maximum temperature
- Viscosity and specific gravity at operating temperature
- Required flow or target emptying time
- Vertical lift, hose length/diameter and inline accessories
- Container type, opening and required tube length
- Available voltage/frequency or compressed-air supply
- Hazardous-area classification, if applicable
- Preferred hose, nozzle, meter and quantity
Frequently asked questions
Is PFP always better than EFP because it has higher maximum flow?
No. EFP can be simpler, lighter and more economical when its duty range is sufficient. Oversizing can reduce handling convenience and add unnecessary cost.
Should I choose PFV for every acid?
No. Compatibility depends on the exact acid, concentration, temperature and complete wetted-material set. PVDF is valuable for many corrosive duties, but it is not universal.
Can one motor be used with different pump tubes?
Some motors are interchangeable within compatible FTI series, but not all pump motors fit or perform correctly with every tube. Confirm the approved tube-and-motor combination.
Can the catalogue maximum flow be used for production planning?
Only as an upper reference. Use the pump curve and your calculated system resistance to estimate the operating flow.
What information prevents the most selection errors?
The chemical concentration, temperature, viscosity, required flow at head, container dimensions and operating-area classification are the most important starting data.
Final selection recommendation
Use EFP when a portable light-duty polypropylene pump meets the duty. Move to PFP when you need the PF Series flow/head range and polypropylene is compatible. Start with PFV when PVDF is the more appropriate compatible tube material. Then verify the motor, all wetted parts and accessories as one system.
Review the FTI product range or send DFIN an RFQ with the checklist above. DFIN can help compare the available configurations against your actual chemical-transfer conditions.