Valve is normally closed without an independent poppet.  A 2.625 inch inlet is standard.  The outlet is 2.50 inch with a 4.50 inch round flange for attachment to the compressor.  The inlet and outlet are in line.  The poppet seals with a special Teflon o-ring mounted in the body.  The valve material is an aluminum body, aluminum poppet and piston with a steel spring.


The rated pressure drop is 4 in_wtr (1 kPa) @ 200 scfm (5.6 m³/min) airflow.  Here a scfm is one cubic foot per minute of air at 14.696 psia (1.01325 bara), 60°F (15.555°C) and 0.0% relative humidity.