Bolland Machine | HemiPleat Composite Cartridges

HemiPleat Composite Cartridge
to fit Gas Turbine Intake Systems

HemiPleat Composite Cartridge

HemiPleat Composite Cartridges

  • Designed to protect turbines in high dust loading environments and to provide continuous operation and stable pressure
  • Uniform media pleating allows for minimum airflow restrictions and lower pressure drop
  • Two filtering stages work together to protect your turbine. The inner filter works as a pre-filter extending the life of the cartridge filter
  • Gasket on metal end cap is permanently bonded to assure an optimal seal at installation

Poly Blend Filter Media

PolyTech™ Standard (color: green) – Proprietary blend of cellulosic fibers and polyester fibers with a moisture resistant silicone treatment.

PolyTech™ Ultra High Efficiency (color: white/green) – Base PolyTech™ standard media described above with a micro-fine synthetic melt blown synthetic laminate for optimum dust release characteristics yielding long service life at high filtration efficiencies.


HemiPleat Composite Cartridge Configurations

HemiPleat vs. Typical Pleats

HemiPleat Breathable Media Pleats
HemiPleat Breathable Media Pleats

Let your turbine
breath easier!

Typical Industry Packed Media Pleats
Typical Industry Packed Media Pleats


Efficiency: Standard - MERV 11 / Hi-Efficiency MERV 15/16 / EN779 - F9
Air Permeability: 25-35 cfm/sq. ft. per 0.5" w.c. (457 - 640 m³/m²h at 125 Pa)
Mullen Burst: (Dry) 40 psi [2.8 bars] / 20 psi [1.4 bars] - Minimum
Gasket: Polyisoprene molded closed cell gasket
End Caps: Galvanized steel (top & bottom) / Optional: Stainless Steel
Filter Sealant: Solid polyurethane top/bottom
Max. Temps: 160°F (71°C) Operating / 180°F (82°C) Surge
Inner Filter: High-loft Polyester
Outer Screen: Galvanized expanded metal / Optional: Stainless steel

Filter Facts

Key Benefits:
  • High filtration efficiency
  • Excellent energy performance
  • Long element life

HemiPleat Composite Cartridge Data Sheet