Skip to content
Pelagard

Spray Coating for HVAC Coils

Request a Quote Send your coil specifications
operator spray coating a hanging finned coil

What we can process

When spray is the right choice

Spray takes over from dipping for three reasons: the part is too large for the tank, the coil is already built into equipment that cannot be immersed, or the coating system is designed to be sprayed at a higher film build.

What controls quality

Spray coverage depends on access. Both faces of the coil are sprayed in overlapping passes at a pressure that pushes coating between the fins without bending them. Film thickness is measured on flat areas and witness panels, and fin faces are inspected for bridging and missed areas before cure.

Process

See the full 14-step process
  1. coil drawings and specification sheets on the review desk
    01

    Specify

    Equipment, exposure, destination

  2. inspector checking a coated coil against the specification sheet
    02

    Sample

    First-article coating for new systems

  3. crushed fins on a coil face, recorded at incoming inspection
    03

    Inspect

    Incoming check with photo record

  4. coated coils lifted from the dip tank
    04

    Coat & cure

    Dip, spray or flood; cure logged

  5. dry film thickness gauge reading on a coated test panel
    05

    QC

    Film thickness, coverage, fin bridging, adhesion

  6. coated coils wrapped and padded on pallets
    06

    Report & ship

    Batch report travels with the goods

Coating options

Selected by site corrosivity. Salt-spray hours from different standards are not compared across systems.

Coating systems available for this service
SystemFilm thicknessCureBest for
PG-S1
Waterborne polysiloxane (sol-gel)
5–15 μmThermal or ambientNew coils before shipment, OEM dip lines
PG-S2
Polysiloxane-urethane clearcoat
5–10 μm160 °C / 60 minAluminium radiators, bakeable heat exchangers
PG-W
Waterborne two-component
5–10 g/m² per side80 °C touch-dryCoil lines, mild coastal and humid sites
PG-C
Air-dry two-component, chemical-resistant
20–40 μmAmbient 72 hComplete units, chemical and wastewater sites

Related

FAQ

Technically reviewed byPelagard Technical TeamCoating selection, application and quality controlLast reviewed:
Does spray reach the inner rows of a deep coil?

Less than dipping does. Spray is applied from both faces at controlled pressure, and coverage between fins is checked. For new coils that can be dipped, dipping gives better coverage.

Which coatings are sprayed?

PG-C is spray-applied by design. PG-S1 and PG-W can be sprayed at low pressure. Customer-specified coatings are sprayed unless the volume justifies a dedicated dip tank.

Request a quote

Tell us the equipment, the site and the destination port. We reply within 24 hours.

Request a Quote Send your coil specifications
WhatsAppRequest a Quote