🔥 Bell & Gossett ASME Relief Valve Set – Model 790-30 (110121)

Protect your hot water system from over-pressure conditions with the Bell & Gossett 790-30 ASME Relief Valve Set (110121). Engineered for reliability and safety, this valve set is designed to safeguard fired and unfired hot water pressure vessels by relieving excess pressure before it becomes a hazard.

Crafted with a brass body and built to ASME Section IV standards, the 790-30 valve set ensures precise and consistent operation. Its unique failsafe disc design allows the valve to maintain proper safety relief function even in the event of a diaphragm rupture, providing peace of mind for homeowners, service technicians, and engineers alike.

Ideal for commercial and residential applications, this valve set is perfect for protecting boilers, hot water tanks, and other pressurized water systems.

✅ Key Features

• ✅ ASME Section IV Certified – tested and labeled for safety compliance

• ✅ Failsafe Disc Design – maintains safety relief function even if diaphragm ruptures

• ✅ Brass Body Construction – durable and corrosion-resistant

• ✅ Set at 30 PSI – provides reliable pressure relief for hot water systems

• ✅ Standard 3/4" Inlet & Outlet Connections – easy installation

• ✅ High Capacity – 790,000 BTU

• ✅ Maximum Working Pressure: 125 PSI

• ✅ Maximum Temperature: 250°F

📊 Specifications Table

⚠️ Common Symptoms / Signs You May Need Replacement

• ❌ Valve leaks or drips under normal operating pressure

• ❌ Pressure in the system exceeds 30 PSI without relief

• ❌ Valve fails to open when system reaches set pressure

• ❌ Visible corrosion or damage to the brass body

• ❌ Repeated system over-pressure alerts or trips

❓ Frequently Asked Questions (FAQ)

Q: What is the purpose of this relief valve?

• ✅ It protects hot water pressure vessels and boilers from over-pressure conditions, preventing damage or safety hazards.

Q: Can this valve be used for steam boilers?

• ⚠️ No, it is designed for hot water systems only and should not be used on steam applications.

Q: How do I install the valve?

• Attach the 3/4" inlet and outlet connections to your system following manufacturer instructions. Professional installation is recommended.

Q: Does it require maintenance?

• 🔧 Periodically inspect for leaks, corrosion, or debris buildup to ensure continued performance.

🛒 Shopping Tips

• 🔍 Verify system pressure requirements before ordering.

• ⚡ Turn off boiler or water system before installation.

• 🔧 Use proper sealing techniques on threaded connections to prevent leaks.

• 💡 Ideal for replacement or new installations on hot water pressure vessels and boilers.