Graco 166066 Plate Valve

Quick-fit valve plate for Graco displacement pumps. Use to restore proper sealing and flow—confirm your pump’s parts diagram before ordering.

Part no. 166066 (166-066)
Typical size: 2½″ (≈64 mm) square
Known fit: Bulldog pump models 206796, 206418
Ideal during rebuilds or when leakage/poor priming occurs
Install with clean mating surfaces and correct torque

Retail Price: $243

You save: $15.19 (6.25%)

Our Price: $227.81

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Description

Genuine Part Details & Fitment

Compatible Machines

Graco Bulldog Displacement Pump — Model 206796
Graco Bulldog Displacement Pump — Model 206418

Overview

The Graco 166066 Plate Valve is a precision valve plate used inside select Graco piston/displacement pumps. It forms part of the internal check/valve assembly that controls fluid direction and supports consistent pump performance under demanding coating applications.

Key Features

Exact-fit replacement to restore proper valve sealing and flow.
Durable, factory-spec component for industrial duty cycles.
Suitable for professional coating and fluid-handling environments.

Specifications

Part Number	166066 (166-066)
Component Type	Valve Plate (pump internal)
Typical Plate Size	2 ½″ (≈ 64 mm) square
Application	Piston/displacement pump valve assembly

When to Replace

Loss of prime, erratic flow, or leakage past the valve.
Visible scoring, pitting, or deformation on the plate surface.
Preventive maintenance during pump rebuilds or kit installations.

Installation Notes

Relieve system pressure and follow the pump’s service manual step-by-step.
Clean mating surfaces; remove debris and residue before assembly.
Tighten hardware to the specified torque; recheck after initial run-in.
Inspect related components (seats, checks, balls) and replace if worn.

Frequently Asked Questions

Question	Answer
Does this plate fit all Graco pumps?	No. It fits only models that specify part 166066 in their parts breakdown. Always confirm against your exact pump model.
How do I confirm compatibility?	Check your pump’s exploded parts diagram and verify both the part number and the plate dimensions/pattern listed for your model.
What happens if the wrong plate is installed?	Incorrect fit can cause leakage, reduced output, poor priming, or premature wear of the valve assembly.
Should I replace other parts at the same time?	Often yes. Inspect valve seats, checks/balls, and related seals; replacing as a set can restore full performance and reduce downtime.

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