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Apollo 19MHGA220Q 1½″ Bronze Safety Relief Valve provides ASME-certified overpressure protection at 220 psi with MNPT inlet and FNPT outlet—ideal for steam/air systems.
Apollo 19MHGA220Q 1½″ Bronze Safety Relief Valve is a premium, ASME-certified safety valve designed for reliable overpressure protection in steam power boilers, pressure vessels, compressed-air lines, and industrial systems. Built to ASME Sections I & VIII standards, this valve offers a set pressure of 220 psi and is fully certified for steam, air, and non-hazardous gas service. The inlet is 1½″ MNPT and the outlet is 2″ FNPT, making installation easy with standard threaded piping.
Crafted with a durable bronze ASTM B584 body and brass trim, the Apollo 19MHGA220Q is rated for maximum operating pressures of 300 psi at ambient temperatures (-60 °F to 406 °F). It delivers National Board-certified capacity for ASME Sections I/II systems, supporting both high-capacity steam installations and compressed air applications.
Key safety features include a wide wrench hex for secure installation, stainless steel springs, and two control rings for precise calibration. A tapped body drain allows safe removal of condensate or steam during mounting. This valve is made in the USA, carries CRN approval, and ships with performance test reports, ensuring compliance and quality assurance.
ASME Sections I & VIII certified for steam and pressure-vessel protection
220 psi set pressure with range from 5 to 300 psig over -60 °F to 406 °F
Bronze ASTM B584 body and brass trim—durable for industrial conditions
Threaded inlet/outlet: 1½″ MNPT × 2″ FNPT for easy installation
Stainless steel spring & brass mechanism, ensuring corrosion resistance
Tapped drain port vents condensate safely during setup
USA-made with CRN compliance and performance test documentation
| Specification | Details |
|---|---|
| Model | 19MHGA220Q |
| Set Pressure | 220 psig @ -60 °F to 406 °F |
| Certified Range | 5–300 psig over specified temperature range |
| Inlet Connection | 1½″ MNPT (male NPT) |
| Outlet Connection | 2″ FNPT (female NPT) |
| Body Material | Bronze ASTM B584 |
| Trim Material | Brass, stainless steel spring |
| Certifications | ASME Sections I & VIII, CRN |
| Operating Temp Range | -60 °F to 406 °F |
| Max Operating Pressure | 300 psi @ 20 °C |
| Weight | ~5.08 kg (11.2 lb) |
| Drain Port | Tapped condensate outlet for safe installation handling |
| Origin | USA |
The Apollo 19MHGA220Q is ideal for:
Steam boiler safety relief valve in commercial/industrial settings
Compressed-air system pressure protection
Overpressure safeguarding for pressure vessels and piping
High-capacity steam/gas discharge scenarios
Applications requiring ASME-certified relief valves
Thread onto piping using proper sealant or tape (tapered threads only).
Orient drain port for safe condensate disposal.
For steam systems, discharge to suitable drain or receiver.
Periodically inspect seating, spring, and trim for wear.
Do not attempt tampering with set pressure—factory tested.
ASME-certified and CRN-approved for safety and legal compliance
High capacity and precise calibration (National Board-tested)
Durable bronze and brass body with stainless spring ensure long life
Easy to install with threaded connections and standard drain access
Ideal for steam/air/gas systems needing reliable overpressure protection
Developed by Conbraco’s Apollo brand, the 19MHGA220Q combines quality manufacturing, ASME and CRN certifications, and full test documentation. Its robust design and set pressure precision make it a trusted choice for demanding boiler, vessel, and pneumatic system safety.
