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Graco 116521 Regulator Filter Air

The Graco 116521 Air Filter/Regulator delivers clean, moisture‑ and particle‑free compressed air while regulating pressure — essential for smooth spray or pneumatic operation.

  • Inlet/Outlet: 3/4″ NPSM → 3/4″ NPT
  • Pressure Range: 5–125 psi
  • Filter: 40‑micron polypropylene element
  • Use for: Graco air‑motor pumps, sprayers, proportioners — any compressed‑air system needing clean, regulated air

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Graco 116521 – Air Filter / Regulator

The Graco 116521 Regulator Filter Air is a combined air‑filter and pressure regulator unit. It delivers clean, moisture‑ and particle‑free compressed air, while regulating air pressure to maintain stable performance in pneumatic and spray systems.

Key Features & Specifications

  • Inlet / Outlet Threads: 3/4″ NPSM (inlet, female) → 3/4″ NPT (outlet, female)
  • Pressure Range: 5–125 psi (0.3–8.6 bar)
  • Filter Element: 40‑micron polypropylene — filters out particles & moisture before air reaches downstream equipment
  • Durable Construction: Built for industrial and spray‑coating environments; compatible with standard 3/4″ fittings
  • OEM Quality: Genuine Graco part ensures proper fit, sealing, and performance reliability

Compatible Systems / Applications

  • Graco pneumatic pumps, sprayers, or proportioning equipment requiring regulated air supply
  • Air‑motor driven spray systems that list 116521 (or equivalent air‑filter/regulator) in their air‑control assemblies
  • Industrial painting, coating, and fluid‑handling setups using compressed air and needing moisture/particle filtration

Note: Always verify that your equipment’s air‑line configuration uses 3/4″ inlet/outlet and requires a filter/regulator — check the parts manual or air‑control schematic prior to installation.

Why Use 116521?

  • Ensures clean, contaminant‑free air — protects internal pump and spray components from wear, clogging, or damage
  • Provides stable, adjustable air pressure — critical for consistent spray quality or pump performance
  • Simplifies air‑supply setup by combining filtration and regulation in a single unit
  • OEM‑grade reliability and compatibility — designed specifically for Graco air‑driven equipment

Frequently Asked Questions

The 116521 unit filters out particles and moisture from compressed air and regulates air pressure to a stable, safe value — protecting downstream pneumatic or spray equipment and ensuring consistent performance.

It regulates air pressure from approximately 5 psi up to 125 psi (0.3–8.6 bar).

The inlet connection is 3/4″ NPSM (female) and the outlet is 3/4″ NPT (female) — standard for many Graco air‑supply lines and compatible pneumatic equipment.

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