The Richter LPV-D/F Low Pressure In-line Vent Valve is DIN/ISO design. The LPV-D/F series is an in-line design type, direct acting, weight-loaded, certified for vapours, gases and fluids, gauge pressure +20 to +120 mbar, vacuum -20 to -120 mbar. Face-to-face according to DIN EN 558-1 and ISO 5752 series 1.