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76745 - Mac Nut, 1-1/4 Seat Washer - Hays Fluid Controls

Brand: Hays Fluid Controls
Part #: 76745
$16.33
🚚 Factory Ordered This item is ordered straight from the factory just for you! We'll ship it as soon as it reaches our distribution center.
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Brand New Part
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Manufacturer Warranty Included - More info
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Description / 76745 - Mac Nut, 1-1/4 Seat Washer - Hays Fluid Controls

Genuine Hays 76745 Valve Seat
Hays Fluid Controls • Genuine OEM Component
76745HaysSeat

76745 Valve Seat Hays Fluid Controls Hays Valve Seat 76745 replacement Mac Nut, 1-1/4 Seat Washer

The Hays 76745 is a Genuine Hays valve seat the sealing surface the disc or piston closes against. A worn or scored seat leaks by even when fully closed; a new seat restores positive shutoff. Order the 76745 as a direct Genuine Hays Fluid Controls replacement.

⚠ Important Note

Depressurize and lock out the line before servicing, and verify the part matches your valve series, size, and temperature/pressure rating. Use only compatible seal lubricants the wrong grease can swell or degrade EPDM and PTFE seals.

✗ Symptoms

  • ✗ Leak at the stem, seat, or bonnet
  • ✗ Worn or hardened seals
  • ✗ Valve no longer holds setpoint
  • ✗ Rough or sticking operation
  • ✗ Internal wear after years of service

✓ What This Restores

  • ✓ Leak-free sealing
  • ✓ Fresh OEM-spec seals and surfaces
  • ✓ Restored setpoint accuracy
  • ✓ Smooth, reliable operation
  • ✓ Full service life restored

🔧 Installation Overview

  1. Isolate and depressurize the line, shut off circulating pumps, and disconnect power to any actuator or coil before servicing.
  2. Drain the section into a catch pan hydronic fluid may be hot and under residual pressure.
  3. Remove the bonnet, cap, or cartridge per the Hays service sheet for the valve series.
  4. Install the new Genuine Hays component, lubricate seals with a compatible lubricant, and reassemble to the specified torque.
  5. Slowly re-pressurize, bleed trapped air, and check for leaks before returning the system to service.

📋 Specifications

Specifications
Component TypeValve Seat
BrandGenuine Hays Fluid Controls
Connection Size1"

❓ Common Questions

Is this a Genuine Hays part?

Yes the 76745 is a Genuine Hays Fluid Controls valve seat, not a generic substitute.

How do I confirm it fits my valve?

Match your valve series, connection size, and the part number stamped on the unit against the specifications above. If you're unsure, send us your valve model and we'll confirm.

Should I rebuild or replace the whole valve?

For most worn valves, rebuilding with the matched Genuine Hays kit restores factory sealing at a fraction of full-valve cost.

Not sure this is the right part?

Send us your valve model or the number stamped on the unit and our parts team will confirm the fit.

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