Graco Fire-Ball 425 6:1/10:1 Thermal Relief Kit - 1,600 psi #240429
| Manufacturer Part Number | 240429 |
| Type | Thermal relief valve installation kit |
| Relief Pressure Rating | 1,600 psi (110 bar) |
| Compatible Pumps | Graco Fire-Ball 425 6:1 and 10:1 |
| Included Valve | 102527 (1,600 psi, factory-set) |
| Also Includes | Bung adapter 191075; swivel 155494; hose 238370 |
Graco Fire-Ball 425 6:1/10:1 Thermal Relief Kit - 1,600 psi #240429
The Graco #240429 is the thermal relief valve kit for the Fire-Ball 425 6:1 and 10:1 oil pumps, rated 1,600 psi (110 bar). Those ratios generate far higher fluid working pressure than the 3:1 (1,100 and 1,800 psi against 540), so their relief protection has to match — and both pump manuals list this kit among the required accessories.
Why the 6:1 and 10:1 Need It — Per the Pump Manuals
- Both the 6:1 manual (308608) and the 10:1 manual (308655) list the thermal relief kit 240429 as a required accessory
- High-ratio circuits deadhead at 1,100–1,800 psi — heat-soaked oil spikes past that fast
- The 1,600 psi factory-set valve vents the spike before it damages the pump, fittings or hose
- Install on the dispensing-valve side per the manuals
Questions Shops Ask
Which Fire-Ball 425 ratio does this kit fit?
The 6:1 and 10:1. Those run 1,100 psi and 1,800 psi fluid circuits and take the 1,600 psi valve — this kit. The 3:1 runs a 540 psi circuit and uses Graco kit 237601 (600 psi) instead. Mixing them defeats the protection: a 600 psi valve here vents early and constantly; a 1,600 psi valve on a 3:1 never opens when it should.
Is it required or just recommended?
Required. Both the 6:1 and 10:1 pump manuals list the thermal relief kit among the four required accessories (with the air shut-off bleed device, fluid drain valve and ground wire). If your relief valve is old or its setting is unknown, replace it — relief settings drift.
What comes in the box?
The factory-set 1,600 psi valve (Graco 102527), bung adapter (191075), swivel (155494) and hose (238370) — the complete hookup set per the catalog's accessory table.
Why Buy from Alamo
- Genuine Graco, matched to the model. We confirm fit against the catalog and manuals before the order goes in.
- The consumables that follow it. Seals, kits, filters and brackets for the life of the install — see the notice on this page for the Graco order minimum.
- Questions answered by people who know the line. Call (817) 865-3707 before you order.
Fitment & Setup
Fits the Fire-Ball 425 6:1 and 10:1 oil pumps. Match the kit to the pump's ratio before ordering — call (817) 865-3707 with your pump part number if you are not sure which ratio you have. Install on the dispensing-valve side per the pump manual.
Need help matching a Graco part to your setup? Call Alamo Equipment at (817) 865-3707.
Part numbers: 240429
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