FUJIKURA FRL Low-Pressure Inline Relief Valve

• Low-pressure inline design: The outlet can be connected to piping, making the valve suitable for systems that recover exhausted gas or liquid after relief.
• High-precision cracking performance: Cracking pressure is factory-set to match the specified low-pressure relief requirement.
• High sealability: Good sealing performance helps reduce leakage before the set cracking pressure is reached.
• Multiple connection sizes: Several inlet R male-thread and outlet Rc female-thread combinations are available for different piping and flow requirements.
• Brass and SUS316 bodies: Brass and SUS316 body options are available with FKM as the standard seal material.

Q1: What is the FUJIKURA FRL Series?
A: The FRL Series is a low-pressure inline relief valve that releases fluid through the outlet and allows it to be routed into recovery piping when line pressure reaches the set cracking pressure.

Q2: What is the difference between the FRL and FRA Series?
A: FRA is an atmospheric relief type for direct external discharge. FRL is an inline type with an outlet connection for recovering exhausted gas or liquid.

Q3: What body materials are available?
A: Brass and SUS316 body options are available, represented by model codes B and T.

Q4: What connection sizes are available?
A: Several inlet R male-thread and outlet Rc female-thread combinations are available, ranging approximately from R1/8×Rc1/4 to R1×Rc1-1/4.

Q5: What cracking pressure range is available?
A: The available setting range is 5 to 1000kPa, with a maximum of 950kPa for the R1/4 size. The actual setting range should be confirmed based on the selected conditions.

Q6: How is the cracking pressure specified?
A: The cracking pressure is specified in kPa and added to the end of the model number, such as FRLT-2-V-500 for a 500kPa setting.

Q7: Can the FRL cracking pressure be adjusted by the user?
A: The cracking pressure is set before shipment, so the required setting pressure should be specified during selection.

Q8: What should be noted for settings of 5kPa or less?
A: For settings of 5kPa or less, the outlet must face upward to maintain the specified cracking characteristics.

Q9: What seal material is used?
A: FKM is the standard seal material. Other materials should be confirmed based on fluid, temperature, and operating environment.

Q10: What applications is the FRL Series suitable for?
A: It is suitable for machine tools, industrial furnaces, medical equipment, analyzers, fuel cells, batteries, water-treatment equipment, compressors, compact pressure vessels, and low-pressure relief lines requiring recovery of exhausted gas or liquid.