148F3222

The 148F3222 safety relief valve is produced by Danfoss as part of the SFA Safety Relief Valves series. It is installed in hydraulic automation circuits to discharge fluid when system pressure rises above a defined limit. The pressure setting is 22 bar, so the spring lifts when the line reaches that level. An inlet size of 3/4 in matches standard supply lines in compact manifolds, while the outlet size of 1 in allows released fluid to exit with minimal back pressure. A G connection type provides compatibility with metric pipe threads. The flow diameter is 13 mm, establishing the passage size through the seat, and during operation the disc moves by 4.8 mm, which is its rated lift to create the required opening area. The nominal diameter is specified as DN < 15 to classify the valve among small-bore components.

A flow area of 133 mm² defines the cross section available for discharge and determines the capacity rating. The valve belongs to fluid group 1, indicating it is built for substances that may pose higher hazards in pressure equipment. The minimum operating temperature is -50 °C, enabling safe function in low ambient installations, and the maximum operating temperature is 100 °C, permitting exposure to heated fluid without loss of integrity. The net weight is 1.926 kg, which supports rigid mounting without additional bracing. A PED category IV rating places the valve in the highest regulatory class for pressure equipment, requiring full conformity assessment. Internal volume is 1.291 L, and this cavity size influences the overall displacement during rapid venting.