The Richter GUT/F Overflow Valve is DIN/ISO design. The GUT/F series is a direct-acting, spring-loaded with a set pressure range 1.0 to 13 bar, bellows made of PTFE, seat and plug made of modified PTFE, bellows, plug and seat replaceable, certified for liquids. Face-to-face according to DIN EN 558-1 and ISO 5752 series 1.