Our compressed air water separators come in a variety of sizes ranging from 1/8 inch to 12 inch connection sizes ranging from Rp (BSP parallel thread), Rc (BSP conical thread) and NPT. The high operating temperature of the Walker water separator was 120℃ (248? F)*, operating pressure up to 20.7 bar gauge pressure (300 lb/sq inch gauge pressure)*, flow rates ranging from 6 SCFM (10 standard m3 / h) to 15,000 SCFM (2550 standard m3 / h).