QBK-25/40LN
Model: QBK-40, DN40 (1.5″)
Pump Housing: Die-cast aluminum alloy
Diaphragm: F46+NBR
Working Air Pressure: 0.2~0.7MPa dry compressed air
Rated Flow: 4~8m³/h, Max Discharge Pressure: 0.6MPa
Dry priming lift:4m, Wet priming lift:7m
Max. Head: 70m
Allowable medium viscosity ≤10000cps, medium temp 0℃~70℃
Dry running available without shaft seal damage, intrinsically explosion-proof without motor.
Comes with rubber hose barb connectors for fast pipeline connection.
Stable smooth delivery for daily chemical emulsions, ink, color paste for sand mill circulation.
Introduction
QBK-40 Aluminum Alloy Pneumatic Diaphragm Pump
AODD Pumps FAQ (Short Version)
Material & Selection
Q1: What pump body & diaphragm materials do you offer?
A1: Body: PP, PVDF, aluminum, cast iron, 304/316 stainless steel. Diaphragm: PTFE, NBR, EPDM, Santoprene. PP+PTFE is best for corrosive chemicals.
Q2: What liquids fit PP+PTFE pumps?
A2: Acids, alkalis, electroplating fluid, paint, slurry and most solvents. Not for high-temp strong oxidants.
Q3: How to pick the right model?
A3: Tell us your liquid type, required flow, self-priming height and air pressure, we’ll match the pump.
Performance & Application
Q4: Can this pump run dry?
A4: Yes, dry running won’t burn out the pump, unlike centrifugal pumps.
Q5: What’s the max self-priming height?
A5: Up to 5–7 meters, no pre-filling needed before startup.
Q6: Can it pump liquid with particles or thick slurry?
A6: Yes, flexible diaphragm resists clogging, works for sludge, paint, mining slurry with ≤3mm particles.
Q7: Safe for flammable & explosive workshops?
A7: 100% safe. Air-powered, no electric sparks, anti-static, no extra explosion-proof motor required.
Q8: Can the pump be submerged in liquid?
A8: Yes, no electric leakage risk, ideal for underground tanks and sewage pools.
Operation & Adjustment
Q9: How to adjust flow and pressure?
A9: Simply tweak the air inlet valve for stepless flow & pressure control.
Q10: What if the outlet gets blocked?
A10: Built-in overload protection; it stops automatically and restarts after unclogging.
Maintenance & Warranty
Q11: Is maintenance complicated?
A11: Simple structure, easy to replace diaphragms and valves without special tools.
Q12: What’s your warranty?
A12: 12-month warranty for the whole pump (excluding wear parts like diaphragms and balls). Low-cost spare parts available after warranty.
Q13: Do you supply spare parts?
A13: All wear parts (PTFE diaphragms, balls, gaskets) are in stock for fast delivery.
Purchase & Custom
Q14: Are you a manufacturer?
A14: Yes, factory direct supply, support OEM & ODM custom logo and packaging.
Q15: Can I order samples?
A15: Samples available, buyer covers shipping; bulk order discounts after testing.
Q16: How fast is delivery?
A16: Standard models ship in 3–5 working days; custom orders take 7–15 days.
Industry Usage
Q17: What industries is this pump suitable for?
A17: Chemical, food & dairy, pharmaceutical, sewage, paint, petrochemical, mining, papermaking, electroplating.
Q18: Can it transfer food/pharma liquid?
A18: Yes, food-grade PTFE diaphragm option prevents contamination and is easy to sanitize.
