Graco Fire-Ball 425 3:1 Thermal Relief Valve Kit - 600 psi #237601
| Manufacturer Part Number | 237601 |
| Type | Thermal relief valve installation kit |
| Relief Pressure Rating | 600 psi (41 bar) |
| Compatible Pump | Graco Fire-Ball 425 3:1 |
| Included Valve | 112174 (600 psi, factory-set) |
| Also Includes | Bung adapter 191075; swivel 155494; hose 238370 |
Graco Fire-Ball 425 3:1 Thermal Relief Valve Kit - 600 psi #237601
The Graco #237601 is the thermal relief valve kit for the Fire-Ball 425 3:1 oil pump, rated 600 psi (41 bar). It protects the pump outlet and downstream piping from pressure spikes when a deadheaded line heat-soaks trapped oil — the pump manual lists it among the four required accessories for a compliant install.
Why the Fire-Ball 425 Needs It — Per the Pump Manual
- A thermal relief kit is a required accessory on the Fire-Ball 425 (pump manual 308485)
- Trapped oil in a closed line expands as it warms — the valve vents the spike before it splits fittings or hoses
- Relief range as printed in the pump manual: 600 psi minimum, 630 psi maximum
- Install on the dispensing-valve side per the manual; the kit's bung adapter, swivel and hose complete the hookup
Questions Shops Ask
Which Fire-Ball 425 ratio does this kit fit?
The 3:1 only. The 3:1 runs a 540 psi fluid circuit, so its relief protection is the 600 psi valve — this kit. The 6:1 and 10:1 run 1,100/1,800 psi circuits and use Graco kit 240429 (1,600 psi) instead. Never mix them: a 600 psi valve on a high-ratio circuit 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. The pump manual lists the thermal relief kit among the four required accessories (with the air shut-off bleed device, fluid drain valve and ground wire). If your Fire-Ball 425 3:1 has an old or unknown relief valve, replace it with this kit — relief settings drift.
What comes in the box?
The factory-set 600 psi valve (Graco 112174), the bung adapter (191075), a swivel (155494) and the hose (238370) — the complete hookup set per the catalog's accessory table. No other hardware needed for the install shown in the manual.
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 3:1 oil pump only. 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: 237601
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