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Graco 207149 Valve Seat

The Graco 207149 Valve Seat is a high-durability replacement part made from stainless steel with a tungsten carbide insert. It ensures reliable sealing and long service life in Hydra-Mastic spray guns.

  • Fits Graco Hydra-Mastic Spray Gun Model 206660 (Series D) with diffuser
  • Made of 416 stainless steel with carbide insert for wear resistance
  • Provides precise sealing for consistent spray control
  • Recommended torque: approximately 190–210 in-lb (23–24 N·m)

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Overview & Key Details

Compatible Machines

This part is used in the Hydra-Mastic series spray gun configuration noted below. Please confirm your gun’s model and series before ordering.

  • Graco Hydra-Mastic Spray Gun, Model 206660 (Series D) — used on versions configured with diffuser.

Product Summary

The Graco 207149 Valve Seat is a durable, high-wear seat used in the spray gun’s fluid section to provide a precise sealing surface for the needle. Built with stainless steel and a tungsten carbide insert, it’s designed for long service life in demanding coatings.

Technical Details

Part Number 207149
Component Valve Seat (seat for fluid needle shut-off)
Construction 416 stainless steel body with tungsten carbide insert
Intended Use Hydra-Mastic gun configuration with diffuser (see Compatible Machines)
Typical Torque Spec* Reference manual guidance ~ 190–210 in-lb (≈23–24 N·m) when applicable

 

Fitment & Service Notes

  • Verify the model on your gun tag (e.g., 206660 Series D) and confirm diffuser configuration.
  • Inspect the needle and seat together—if the seat is worn or pitted, sealing issues and drips can occur.
  • Clean mating surfaces; install carefully to avoid damage to the carbide insert.

Frequently Asked Questions

No. The 207149 is the seat. It is specified for Hydra-Mastic Model 206660 when that gun is configured with a diffuser. The diffuser is a separate component in the gun assembly.

Check the model/series on the gun tag and compare to your service manual’s parts list. If your gun is Hydra-Mastic 206660 (Series D) and uses a diffuser, 207149 is the specified seat. Other gun variants may use a different seat number.

Persistent dripping after trigger release, poor shut-off, or difficulty achieving consistent fan/pressure can point to a damaged needle/seat interface. Inspect both parts and replace as needed.

Always relieve system pressure, keep the seat and threads clean, and use the correct torque specified in your manual (often around 190–210 in-lb). Over- or under-torque can cause leaks or damage.

The seat body is stainless steel (commonly 416) with a tungsten carbide insert for wear resistance and long life with demanding coatings.

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