Choosing the right 2 inch pressure relief valve (PRV) is essential for protecting vessels, pipelines, and equipment across plumbing, industrial, and automotive vacuum systems. This guide highlights top 2″ PRVs available on Amazon, with objective details to help you compare performance, materials, and compatibility. Each entry includes a quick product snapshot to aid quick decision making.
Summary of chosen products:
| Product | Brand | Diameter | Key Feature |
|---|---|---|---|
| Brass Pressure Relief Valve, 300 CFM | MZ | 2″ | Adjustable 4–22 psi |
| Brass Pressure Relief Valve, 300 CFM | RIV | 2″ | Adjustable 4–22 psi |
| Apollo Valve 14-200 Series | APOLLO | 2″ | Bronze body, ASME steam, 15 psi |
| Cash Acme EB45 Pressure Regulating Valve | Cash Acme | 2″ | Downstream pressure regulation, tamper-resistant |
| Apollo Valve 13-214 Series Bronze | APOLLO | 1.5″ x 2″ | 15 psi, PTFE disc |
Brass Pressure Relief Valve, 300 CFM — MZ (1050-0000 MZ)
The MZ 1050-0000 MZ model is a fully adjustable 2″ pressure relief valve designed for vacuum truck and trailer applications. It features a 2″ diameter and a 300 CFM capacity, with an adjustable release range from 4 to 22 psi. The brass construction promotes durability in demanding environments and corrosion resistance. This valve offers straightforward setup for systems requiring precise pressure control to prevent over-pressurization.
Brass Pressure Relief Valve, 300 CFM — RIV (1050-0000 RIV)
Similar in specification to the MZ variant, the RIV 1050-0000 model offers an adjustable relief range of 4 to 22 psi in a 2″ brass body. Designed for vacuum trucks and trailers, it emphasizes reliability in fluctuating pressure conditions. Its robust brass body supports long service life in mixed-use environments and simplifies maintenance with a broad adjustment window.
Apollo Valve 14-200 Series Bronze Safety Relief Valve
The Apollo 14-200 series offers a bronze safety relief valve suitable for ASME steam applications with a preset 15 psi relief. With a 2″ NPT connection, it provides dependable sealing due to a cast bronze body and a steel spring for corrosion resistance. This valve is appropriate for systems requiring a standardized, pre-set pressure release to prevent over-pressurization and protect downstream components.
Cash Acme EB45 Pressure Regulating Valve
The Cash Acme EB45 is a direct pressure regulating valve with a 2″ NPT thread and a compact inline design. It features a tamper-resistant top and an adjustable downstream pressure setting, backed by a design that emphasizes durability in potable and non-potable water systems. Its cartridge-style internals simplify maintenance and allow easy access to the adjustment screw for setting stability.
Reliance Water Heater T&P Valve
The Reliance T&P valve combines temperature and pressure protection for water heaters with a 2″ long shank and a 3/4″ male NPT inlet. While primarily used as a heater safety valve, its 2″ shank and integrated design provide a practical option in residential or light commercial settings where added protection against overheating and over-pressurization is needed. Suitable for systems requiring a compact, reliable relief mechanism in close proximity to heaters.
Buying Guide: Key Considerations For 2 Inch Pressure Relief Valves
- Application and compatibility: Confirm the valve type (PRV vs. T&P/steam safety) and ensure the connection size matches your piping or vessel in inches (2″ NPT or 2″ pipe).)
- Set pressure and range: Look for adjustable ranges that cover the desired operating pressure. Many 2″ valves offer 4–22 psi adjustments; fixed-set valves provide precise protection for standard systems.
- Material and environment: Brass and bronze bodies deliver corrosion resistance suitable for water, air, and steam environments. Consider stainless components for highly corrosive or sensitive applications.
- Certifications and standards: If used in potable water or critical industrial systems, check NSF/ANSI, ASME, or other relevant certifications to meet code requirements and safety expectations.
- Maintenance and accessibility: Valves with easy access to adjustment screws or cartridge designs simplify field maintenance and calibration. Tamper-resistant designs help prevent improper adjustments.
- Installation orientation and space: Verify orientation specifications and room for mounting, especially in compact or vertical installations often found on trailers or compact vessels.
- Warranties and support: Consider brands with clear warranty terms and accessible technical support, especially for critical safety components.
When selecting a 2″ PRV, prioritize a model that matches your system’s pressure profile, fluid type, and installation constraints. The options listed span adjustable, bronze/brass bodies to specialized ASTM/ASME rated units, offering reliable protection across commercial and industrial uses.
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