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Boiler / System Protection
APOLLO Pressure Relief Valve 3/4" 40psi
A pressure relief valve that opens at 40 PSI to protect lower-pressure-rated equipment — most commonly boilers — from overpressure conditions.
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Product details
- Opens at 40 PSI to protect…
- Protects boilers from overpressure conditions
- Maintains system pressure above 15 PSI…
- Recommended for systems running ~20 PSI…
The APOLLO Pressure Relief Valve 3/4" opens at 40 psi. The relief pressure rating optimize pump performance for system to keep above 15psi while accommodating pressure variations without false opening. The 40 psi relief also protect lower pressure rating equipment, such as boilers. For the majority of gas and wood boiler 50 psi is above the maximum operating pressure and 30 psi rating usually lead to false opening of relief or initial operating pressure below 15 psi which is not ideal for proper pump operation.
Designed for reliable performance, it protects equipment from potential damage caused by overpressure conditions. Its precise pressure setting ensures consistent operation, making it ideal for various industrial and residential applications requiring controlled pressure management. Durable construction guarantees long-lasting service and minimal maintenance.
Suggested System Operation
At 10 psi, you may get:
Air pockets
Cavitation
No flow on upper floors
At 20 psi, system is:
Fully filled
Air eliminated
Pump appears stronger
| Opening pressure | 40 PSI |
|---|---|
| Recommended system operating pressure | ~20 PSI |
| Minimum safe pressure | 15 PSI (below this, false-opening risk) |
| Low-pressure risk | ~10 PSI risks air pockets/cavitation on upper floors |
| Size | 3/4" |
| Material / temperature rating | Not published |
- Opening pressure
- 40 PSI
- Recommended system operating pressure
- ~20 PSI
- Minimum safe pressure
- 15 PSI (below this, false-opening risk)
- Low-pressure risk
- ~10 PSI risks air pockets/cavitation on upper floors
- Size
- 3/4"
- Material / temperature rating
- Not published
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