Model Number: FSF20W-7/8 Brand Name: FENSHEN Key Specifications/Special Features: FSFseriesflowswitchesareusedinmeasuringandcontrollingtheflowoftheliquidinthepipe,suchaswater,alcohol, and more,aswellintheplaceswhereitneedschaineffectorcutoutprotectionFSFseriesflowswitcheshaveSPDTswitch,full-sealingstructureasitsshell,andstainlesssteelasitsinsidecomponents,whichcanassureitsuseinanyconditionsFSF-Aseriesflowswitchesareusedforcausticfluidliquid,thematerialsofFSF-AincontactwiththemediumisstainlesssteelApprovals: CQC (China),CE (Europe) ModelDN(mm)Connection size(inch) Flow rate range(L/min) Medium Materials in contact with the medium Increasing flow Decreasing flow FSF10-ZG3/8 Φ10 ZG3/8 2.4~2.9 2.1~2.6 R134a,R22,R407C,R404A/507 water and oil Brass FSF10W-1/2 Φ10 1/2"ODF FSF15-ZG1/2 Φ15 ZG1/2 3.3~4.0 2.9~3.7 FSF15W-5/8 Φ15 5/8"ODF FSF20-G3/4 Φ20 G3/4 6.6~8.8 6.2~7.7 FSF20W-7/8 Φ20 7/8"ODF FSF25W-9/8 Φ25 1-1/8"ODF 13.0~16.1 11.4~14.7 FSF20W-9/8A Φ20 1-1/8"ODF 6.6~8.8 6.2~7.7 R717(ammonia)system stainless steel