Graco 164782 Teflon O-Ring - Aftermarket Replacement | Bedford 15-427

This PTFE sealing ring restores leak-free performance in Graco industrial pump fluid sections and valve stacks where low-friction, chemically resistant sealing is required. Designed as a direct aftermarket alternative, Bedford 15-427 replaces the OEM specification Graco 164782, helping maintain prime, pressure stability, and long service intervals in high-ratio air-powered and hydraulic pump platforms used for coatings and fluid transfer.

Aftermarket PTFE Low-Friction Industrial Duty

Why Choose This O-Ring

  • Virgin PTFE for excellent chemical resistance to common solvents and coatings.
  • Low compression set helps preserve pressure and reduce re-torque frequency.
  • Drop-in sizing for the specified gland; supports quick maintenance turnarounds.

Color: White PTFE (Teflon) sealing ring.

Typical Compatibility

  • Viscount I 1000 hydraulic pumps (material transfer & coatings).
  • Dura-Flo 1100 and 74:1 Premier high-ratio pumps.
  • Monark 5:1 air motor pump assemblies.
  • President 10:1 air-powered pump systems.

Compatibility verified against Bedford cross-reference and distributor listings for the OEM code.

What This Product Fits

  • Graco Viscount I 1000 (hydraulic transfer pumps).
  • Graco Dura-Flo 1100 (high-volume industrial pumps).
  • Graco 74:1 Premier (high-pressure coating pumps).
  • Graco Monark 5:1 (air motor driven pumps).
  • Graco President 10:1 (air-operated pumps).

Model coverage corroborated by Bedford Precision product page and independent distributor catalogs for 164782/15-427 compatibility.

Technical Specifications

Aftermarket Bedford 15-427
OEM Graco 164782
FitsSpecified Graco pump glands/valve stacks (see compatibility list)
TypePTFE (Teflon) O-Ring
MaterialVirgin PTFE for solvent and chemical resistance
FunctionSeals fluid passages to maintain prime and working pressure
PressureWithin the pump family’s rated working pressure when installed correctly
BrandBedford Precision Parts (Aftermarket)

Always confirm groove size and location using your pump’s Illustrated Parts List.

Installation Notes

  1. Relieve pressure; lock out air/hydraulic supply.
  2. Disassemble the relevant gland/valve stack and extract the old seal.
  3. Inspect metal surfaces for scratches; clean with approved solvent.
  4. Install the PTFE ring carefully; avoid twisting or nicking.
  5. Reassemble to torque spec and test for leakage at low pressure first.

Tip: Warm PTFE gently (not above material limits) to improve flexibility during installation.

When to Rebuild / Replace

  • Visible weeping at joints or loss of prime after shutdown.
  • Pressure instability or pulsation unrelated to air supply.
  • Chemical swelling or flattened seal cross-section.
  • Maintenance interval reached per your service schedule.

Bedford vs OEM Comparison

FeatureBedford Aftermarket (15-427)OEM (Graco)
Fit & LocationMatches OEM gland for listed pump familiesFactory specified for same assemblies
Chemical ResistancePTFE for broad solvent/coating compatibilityPTFE per OEM program
AvailabilityIf in stock, ships from Bedford Precision Parts in Bedford Hill, New York.Ships via Graco distribution
ValueCost-efficient optionOEM program

FAQs

Yes. Bedford lists 15-427 as the aftermarket equivalent for the OEM code, used in the listed Graco pump families.
Viscount I 1000, Dura-Flo 1100, 74:1 Premier, Monark 5:1, and President 10:1 pump systems.
It is a white PTFE (Teflon) O-ring designed for chemical resistance and low friction.
No special tools are required. Use seal picks with smooth edges; avoid overstretching PTFE during placement.
When installed correctly in the intended gland, the seal supports the pump family’s original working-pressure rating.

Fitment sources: Bedford Precision product page and distributor listings confirming compatibility with Viscount I 1000, Dura-Flo 1100, 74:1 Premier, Monark 5:1, and President 10:1 pump lines.