Best 1.5 Inch Pressure Relief Valve Options for Vacuum and Pressure Systems
Crucial components for vacuum trucks, trailers, and industrial piping are pressure and vacuum relief valves. The right 1.5 inch valve helps protect equipment, maintain safe pressure levels, and ensure proper condensate drainage. Below are five well-matched options from trusted brands, with key features to guide selection for American systems.
Summary of Selected Products
- Brass Vacuum Relief Valve, 1-1/2″, 370 CFM — RIV (1035-0000 RIV)
- Brass Pressure Relief Valve, 230 CFM — 1-1/2″, Fully Adjustable, Non-Code — RIV (1049-0000 RIV)
- Brass Pressure Relief Valve, 230 CFM — 1-1/2″, Fully Adjustable, Non-Code — MZ (1049-0000 MZ)
- DERNORD Sanitary Adjustable Pressure Vacuum Relief Valve, 1.5” Tri-Clamp, SS304
- Geife 1.5″ Tri Clamp PRV, Fixed at 30 psi, Stainless Steel 304
Brass Vacuum Relief Valve — 1-1/2″ (370 CFM)
Product: Brass Vacuum Relief Valve, 1-1/2″ Diameter, 370 CFM, with adjustable vacuum release. Built in durable brass construction, designed for vacuum trucks and trailers. This valve is suited for applications requiring vacuum control with robust material compatibility. The adjustable feature enables tuning to optimal suction relief, reducing system strain and preventing over-evacuation.
Key features: Adjustable vacuum release, 1-1/2″ diameter, 230 CFM–370 CFM range depending on model, brass construction, suitable for vacuum trucks and trailers. The valve balances vacuum levels to protect piping and tanks while ensuring smooth operation during cycles.
Brass Pressure Relief Valve — 230 CFM, 1-1/2″
Product: Brass Pressure Relief Valve, 230 CFM, 1-1/2″ Diameter, Fully Adjustable, Non-Code (1049-0000 RIV). This valve provides adjustable relief to protect vacuum system components from over-pressurization. Brass construction supports longevity in demanding environments. Suitable for vacuum trucks and trailers where precise pressure control is needed.
Key features: Adjustable relief control, 1-1/2″ connection, 230 CFM rating, brass body, non-code designation. It supports reliable pressure management in various vacuum operations, enabling safer venting and system protection.
Brass Pressure Relief Valve — 230 CFM, 1-1/2″ (MZ)
Product: Brass Pressure Relief Valve, 230 CFM, 1-1/2″ Diameter, Fully Adjustable, Non-Code (1049-0000 MZ). The MZ variant mirrors the RIV design with adjustable relief and durable brass, enabling compatible operation across vacuum truck and trailer systems. It is designed for consistent performance under moderate vacuum and low- to mid-range pressure scenarios.
Key features: Adjustable relief, 1-1/2″ connection, 230 CFM, durable brass construction, non-code specification. A versatile option for installers seeking a familiar brass fixture with adjustable setpoints.
BVAKEIDZE 1-1/2″ Brass Water Pressure Regulating Valve with Gauge
Product: BVAKEIDZE 1-1/2″ Brass Water Pressure Reducing Maintaining Valve Regulator, Adjustable Relief Valve with Gauge. This valve serves water system contexts where maintaining a set pressure with a gauge aid is valuable. Material notes indicate brass construction and compatible 1-1/2″ connection. The gauge suggests straightforward monitoring of downstream pressure for precise regulation.
Key features: 1-1/2″ connection, brass body, adjustable pressure with gauge, valve with gauge for measurement. Useful in applications requiring visible pressure feedback and modulating water flow with reliable brass hardware.
Brass Vacuum Relief Valve — 1-1/2″, 370 CFM (MZ)
Product: Brass Vacuum Relief Valve, 1-1/2″ Diameter, 370 CFM (1035-0000 MZ). This variant emphasizes vacuum relief with a robust brass body and a high CFM rating, suitable for maintaining vacuum integrity in trucks and trailers. Adjustable to match system demands and prevent over-evacuation.
Key features: Adjustable vacuum relief, 1-1/2″ connection, 370 CFM, brass construction, MZ designation. A solid choice for high-demand vacuum operations needing reliable relief performance.
DERNORD Sanitary Adjustable Pressure Vacuum Relief Valve, 1.5” Tri-Clamp
Product: DERNORD Sanitary Adjustable Pressure Vacuum Relief Valve, SS304, 1.5” Tri-Clamp. This valve is designed for sanitary and food-grade environments with stainless steel construction. It supports an adjustable range of 1 to 2.5 bar and uses a 1.5″ Tri-Clamp connection. Ferrule OD measures 50.5 mm, and material is Stainless Steel 304, offering corrosion resistance and cleanability in demanding setups.
Key features: 1-2.5 bar adjustable range, 1.5″ Tri-Clamp connection, stainless steel 304, sanitary design. Suitable for processes requiring sanitary standards and easy cleaning in chemical, food, or medical-adjacent applications.
Apollo Valve 13-214 Series Bronze Safety Relief Valve
Product: Apollo Valve 13-214 Series Bronze Safety Relief Valve, ASME Steam, 15 psi Set Pressure, 1-1/2″ x 2″ NPT. Features a flat seat and PTFE-faced disc for a positive seal, with standard 15 psig set pressure and positive drainage of condensate from the seat area. While specifically described for steam, the design emphasizes reliable sealing and condensate management that can be relevant in related high-pressure, gas, or steam-integrated systems.
Key features: Bronze body, 15 psi set pressure, PTFE-disc seal, condensate drainage, 1-1/2″ x 2″ NPT. Useful for systems needing dependable relief with robust materials in steam-adjacent or high-temperature environments.
Geife 1.5″ Tri Clamp PRV — 30 psi
Product: Geife 1.5″ Tri Clamp PRV, Fixed at 30 psi Pressure Relief and Vacuum Broken Valve, Stainless Steel 304. The fixed setpoint simplifies system design where a constant relief point is preferred. Stainless steel 304 provides corrosion resistance, and the Tri-Clamp connection facilitates clean and quick assembly in sanitary or industrial piping setups. Vacuum breaking capability adds versatility for mixed-pressure systems.
Key features: 1.5″ Tri-Clamp, 30 psi fixed relief, stainless steel 304, vacuum breaking capability. Suitable for environments requiring a non-adjustable, consistent relief point with sanitary or process piping compatibility.
Buying Guide: 1.5 Inch Pressure Relief Valve Choices
- Application fit: Identify whether your system primarily handles vacuum, pressure, or a combination. Vacuum-relief valves prevent over-suction, while pressure-relief valves prevent over-pressurization. Some models offer both capabilities or dual-purpose designs.
- Connection type: Ensure compatibility with your piping: NPT threaded, Tri-Clamp (Sanitary), or custom flanges. Tri-Clamp is common in sanitary lines; NPT threads are prevalent in general pressure systems.
- Material selection: Brass is common for general-purpose, durable, corrosion-resistant service. Stainless steel (304) offers superior corrosion resistance in aggressive or hygienic environments. Bronze is typical in steam-related applications. Pick material based on chemical exposure, cleaning agents, and temperature ranges.
- Setpoint and adjustability: Adjustable valves enable tuning for precise relief pressures. Fixed-setpoint PRVs simplify operation but reduce flexibility in changing conditions. Consider future system modifications when choosing between adjustable and fixed options.
- Flow capacity and CFM rating: Match CFM to the expected venting volume. Under-sized valves can fail to relieve pressure adequately, while over-sized valves may cause seat instability or unnecessary venting.
- Sanitary vs. industrial: If the system handles fluids requiring cleanability and sanitary standards, prefer Tri-Clamp designs and 304/316 stainless steel. For general industrial use, brass or bronze valves are typically sufficient.
- Temperature and pressure ranges: Verify operating temperatures and maximum pressure ratings. Some valves are rated for steam or high-temperature environments, while others are optimized for vacuum conditions.
- Maintenance and availability: Brass and stainless steel parts are widely available with serviceable seats and discs. Check for compatible spare parts and one-year or longer warranties where possible.
- Certifications and standards: Depending on the application (e.g., sanitary, steam, or vacuum), look for compliance with relevant standards and codes to ensure safe operation and compliance with local regulations.