Finding a reliable 2 inch pressure relief valve depends on application, material compatibility, and set pressure. This guide highlights five solid options, covering brass and bronze bodies, adjustable pressure ranges, and compatibility with vacuum systems, hot water, and steam. Each option is evaluated for ease of installation, durability, and upstream/downstream compatibility to help you pick the right valve for safety and performance.
Summary of chosen products
| Product | Brand | Size | Key Feature | Link |
|---|---|---|---|---|
| Brass Pressure Relief Valve, 2″ | MZ | 2″ | Adjustable 4–22 psi, 300 CFM | Amazon |
| Brass Pressure Relief Valve, 2″ (RIV) | RIV | 2″ | Adjustable 4–22 psi, 300 CFM | Amazon |
| Apollo Valve 14-200 Series | APOLLO | 2″ NPT | Bronze, 15 psi preset | Amazon |
| Cash Acme EB45 Pressure Regulating Valve | Cash Acme | 2″ NPT | Inline design, 60 psi, tamper-resistant | Amazon |
| 2inch Brass Water Pressure Reducing Valve | VDPYZANC | 2″ | Regulator with gauge | Amazon |
Brass 2-Inch Pressure Relief Valve — MZ (1050-0000)
The MZ Brass Pressure Relief Valve is designed for vacuum trucks and trailers, offering a 2″ diameter and a 300 CFM rating. It features an adjustable release range from 4 to 22 psi, allowing on-site calibration to match system performance. A solid choice where quick relief and durability are required in high-flow environments. The fully adjustable design supports a range of intake conditions and reduces risk of over-pressurization in mobile vacuum systems.
Brass 2-Inch Pressure Relief Valve — RIV (1050-0000 RIV)
The RIV 2″ pressure relief valve mirrors the MZ design with a 2″ diameter and 300 CFM capacity, plus adjustable pressure ranging from 4 to 22 psi. Its robust brass construction is suited for vacuum trucks and trailers, ensuring reliable relief during high-demand operations. The valve’s versatility makes it appropriate for both stationary and mobile fluid handling systems, where precise pressure control is critical.
Apollo Valve 14-200 Bronze Safety Relief Valve — 2″ NPT
The Apollo 14-200 Series is a bronze safety relief valve rated for 15 psi with a 2″ NPT inlet and outlet configuration. Its cast bronze body and steel spring deliver acceptable corrosion resistance in steam or hot-water applications. The 15 psi preset makes it ideal for boiler feed and steam environments, where consistent relief pressure is essential to prevent equipment damage or safety hazards.
Cash Acme EB45 Pressure Regulating Valve — 2″ NPT
The EB45 line from Cash Acme is a direct pressure regulating valve with a tamper-resistant design and an accessible adjusting screw. The 2″ NPT threaded configuration supports downstream pressure regulation in both commercial and residential water systems. Its inline construction uses brass and stainless steel components to withstand corrosion, meeting NSF/ANSI 372 for safe potable water use.
Reliance 100108456 Temperature & Pressure Valve — 2″ Shank
This Reliance valve features a 2″ long shank and 3/4″ Male NPT inlet. It is designed to protect water heaters from overheating and over-pressurization by providing a reliable relief mechanism. The valve’s compact 2″ shank length supports direct installation into standard water heater connections, balancing safety with ease of maintenance. While not a high-flow industrial option, it is suitable for residential systems requiring dependable protection against pressure surges.
Buying Guide: Key Considerations For 2 Inch Pressure Relief Valves
- Flow capacity and pressure range: Match the valve’s relief setting to your system’s maximum safe pressure and required flow. Higher CFM ratings suit fast-relief needs in heavy machinery, while lower ranges may suffice for domestic use.
- Material and corrosion resistance: Brass and bronze bodies perform well in water, steam, and many cleaning fluids. Consider stainless springs for harsher environments and longer service life in corrosive settings.
- Connection type and size: Ensure the valve’s inlet/outlet threads or connections (2″ NPT, etc.) align with your piping. This prevents leaks and simplifies installation.
- Application compatibility: Boilers, hot water heaters, vacuum trucks, and trailers each have specific relief requirements. Confirm the valve is rated for your intended medium (steam, water, air) and temperature range.
- Tamper resistance and accessibility: Some models include tamper-resistant screws or accessible adjustment screws. Choose based on whether adjustments need to be made in the field and by whom.
- Maintenance and certification: Look for NSF/ANSI approvals or other certifications when using valves in potable water or critical systems. Regular inspection helps ensure reliable operation.
- Installation orientation: Some valves function best in a specific orientation (horizontal vs. vertical). Review manufacturer guidelines to maximize performance and clamp-down on leaks.
- Cost vs. longevity: While higher-grade bronze valves may cost more upfront, their durability and resistance to corrosion can lower total cost of ownership in challenging environments.
When selecting a 2 inch pressure relief valve, consider where the system operates (industrial, commercial, or residential), the anticipated surge pressures, and required maintenance access. The five options above provide a spectrum from general-use vacuum and water systems to dedicated boiler and steam applications, enabling informed decisions across multiple use cases.