Apollo Safety & Relief Valves — ASME Certified

Apollo safety and relief valves are ASME-certified pressure relief devices for hot water, steam, and compressed air systems. Used on water heaters, boilers, pressure vessels, and compressed air systems, these valves are the last line of defense against dangerous overpressure conditions. Apollo safety relief valves are code-required on virtually every commercial and residential water heater and pressure vessel installation. PVFPro stocks the 10, 19, and 500 Series across a wide range of BTU ratings and set pressures.

Series Overview

• 10 Series — ASME Section IV certified. Hot water heating and potable water heater service. Multiple BTU ratings and set pressures. Bronze body, polished chrome, and standard finish options. The standard commercial water heater relief valve.
• 19 Series — ASME Section I (steam) and Section VIII (air/gas) certified. For steam boilers, compressed air vessels, and process equipment requiring ASME Section I or VIII relief devices.
• 500 Series — ASME certified relief valves for vacuum and thermal expansion service. For systems requiring protection against thermal expansion and vacuum conditions.

Applications

• Commercial and residential water heaters — code-required T&P relief valve
• Steam boilers — ASME Section I certified relief for heating boilers
• Pressure vessels — ASME Section VIII certified relief for air receivers and process vessels
• Hydronic heating systems — protection against overpressure in closed-loop systems
• Solar hot water systems — high-temperature relief protection
• Industrial process vessels — custom set pressure options available

Frequently Asked Questions

How do I select the right Apollo relief valve?

Match the valve's BTU rating to the appliance output (water heater, boiler), and match the set pressure to the appliance's maximum working pressure. The relief valve set pressure must not exceed the appliance's rated pressure. For water heaters, the standard is 150 psi set pressure with BTU rating equal to or greater than the heater input.

How often should safety relief valves be replaced?

Industry standard and most manufacturer recommendations call for replacement every 3-5 years on water heaters, or immediately if the valve shows signs of weeping, corrosion, or has been manually operated. Never test a relief valve by lifting the lever on an older valve — replace it.

Are these ASME certified?

Yes. Apollo 10 Series is ASME Section IV certified for hot water heating service. Apollo 19 Series carries both ASME Section I (steam) and Section VIII (air/gas) certifications. Certification codes are stamped on the valve nameplate.