AQUATROL

AQUATROL non-code adjustable relief valves, such as the 69 series, are designed for overpressure protection in air, inert gas, and liquid systems where ASME code certification is not required. They are adjustable and typically used in general industrial applications. AQUATROL ASME Section VIII safety relief valves, like the 740 series, are certified for steam service and comply with the ASME Boiler and Pressure Vessel Code Section VIII. These are mandatory for pressure vessels and steam systems that require code-compliant overpressure protection. The ASME valves have fixed set pressures and are not field-adjustable.

AQUATROL pressure relief valves are constructed from bronze. This material is selected for its corrosion resistance in water, steam, and non-aggressive fluid environments. Bronze also provides good mechanical strength for the pressure ranges these valves are rated for. The valves feature MNPT (male) and FNPT (female) threaded connections, which are standard for NPT piping systems. The bronze body is suitable for many industrial applications, but for aggressive chemical or high-temperature services, material compatibility should be verified against the specific fluid and operating conditions.

AQUATROL non-code adjustable relief valves in the 69 series are available with maximum operating pressures of 125 psi and 250 psi. For example, the 69B1A1M2U1-125 is rated to 125 psi, while the 69E1A1M2U1-250 is rated to 250 psi. These valves are adjustable within a range below the maximum pressure, allowing the user to set the relief point as needed. The specific adjustment range depends on the model and spring configuration. For precise set pressure requirements, consult the valve's datasheet or contact 3G Electric for details on available adjustment ranges.

No, AQUATROL ASME Section VIII safety relief valves, such as the 740 series, are not field-adjustable. These valves are factory-set to a specific pressure and sealed to maintain code compliance. The set pressure is indicated in the model number; for example, the 740GF1M2J1-50 is set to 50 psi. Attempting to adjust an ASME-certified valve in the field would void its certification and could lead to non-compliance with pressure vessel codes. If a different set pressure is required, a valve with the appropriate factory setting must be selected.

AQUATROL pressure relief valves are available with MNPT x FNPT threaded connections. For non-code adjustable relief valves (69 series), sizes include 3/4 inch x 3/4 inch and 1 1/2 inch x 1 1/2 inch. For ASME Section VIII steam safety relief valves (740 series), sizes include 1 1/2 inch x 1 1/2 inch and 2 inch x 2 inch. All connections are NPT (National Pipe Thread) standard, which is common in industrial piping systems. The valve inlet and outlet are the same size for the models listed.

AQUATROL non-code adjustable relief valves are specified for air, inert gas, and liquids. They are not recommended for steam service unless explicitly stated in the product documentation. For steam overpressure protection, AQUATROL offers ASME Section VIII certified safety relief valves (740 series) that are designed and certified for steam applications. Using a non-code valve on steam could result in improper operation or failure, as steam requires specific design considerations for temperature and phase change. Always select a valve rated for the specific fluid and service conditions.