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LIS -- Devoted To Spraying BE THE SPRAY GUN EXPERT IN THE WORLD

Suction Feed Spray Guns

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What Is a Suction Feed Spray Gun?

A suction-feed spray gun draws fluid from a bottom-mounted cup using the low-pressure zone created by air flowing through the gun body — the same venturi principle used in carburettors and laboratory aspirators. Because the fluid path runs upward against gravity, suction-feed guns typically operate at slightly higher inlet pressures than gravity-feed designs, making them better suited to lower-viscosity materials and high-volume continuous spraying where large cup capacity is advantageous.

Suction-feed guns remain the preferred choice in production environments where a 1-litre or 1.5-litre cup avoids the need for frequent refills — industrial painting lines, large-area primer application, and agricultural equipment coating are common examples. LIS has manufactured suction-feed guns for export markets since the 1980s, and the range covers standard cup sizes from 500 ml to 1.5 litres with interchangeable nozzle sets.

Specification

ParameterStandard Range
Feed TypeSuction (bottom-mount cup)
Cup Capacity500 ml / 750 ml / 1000 ml / 1500 ml
Cup MaterialAluminium / steel / plastic (solvent-resistant)
Nozzle Size Options1.0 / 1.2 / 1.5 / 1.8 / 2.0 / 2.5 mm
Inlet Pressure Range30–60 psi (2.1–4.1 bar)
Fan WidthUp to 320 mm
Fluid Delivery RateUp to 600 ml/min (nozzle dependent)
Body MaterialDie-cast aluminium alloy
Viscosity RangeLow-to-medium (thinner materials preferred)
Weight (body only)500–700 g
OEM/ODMAvailable

Application

  • Large-Surface Priming: High cup capacity allows uninterrupted spraying across vehicle bonnets, doors, and large industrial panels.
  • Agricultural Equipment Painting: Field machinery requires large volumes of rust-inhibiting primer and topcoat; suction-feed guns handle this efficiently.
  • Industrial Production Lines: Where spray guns run continuously for multiple hours, the large suction cup reduces operator downtime for refills.
  • Stains and Sealers on Wood: Thin-viscosity penetrating stains and sealers flow readily through suction-feed systems at moderate pressure.
  • Training and Demonstration: Many vocational training facilities use suction-feed guns because they clearly illustrate spray gun principles and are easy to set up for students.
  • General Maintenance Painting: Industrial maintenance crews value the large cup capacity for painting structural steelwork, machinery, and plant equipment.

Advantages

  • Large Cup Capacity: Up to 1.5 litres reduces refill frequency on large-surface applications — directly improving production throughput.
  • Lower Gun Cost: Suction-feed guns are generally simpler to manufacture than equivalent gravity or pressure-feed models, offering better value for budget-conscious buyers.
  • Stable Pattern on Flat Surfaces: Consistent suction draw on horizontal and vertical flat panels without the tilting sensitivity of gravity cups.
  • Easy Material Visibility: Transparent or semi-transparent cup options allow operators to monitor remaining material without stopping.
  • Familiar Ergonomics: The classic spray gun shape and balanced weight distribution makes suction-feed guns comfortable for operators trained on older equipment.
  • Wide Nozzle Compatibility: LIS suction-feed guns accept the same standard air cap threads as the gravity-feed range, simplifying spare parts inventory for distributors.

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