Slip joint valve 1½", 0 - 16 bar, without pilot valve V2A (304), 

closes against the medium, opens pneumatically, closes by spring power, valve housing made of: 1.4408, inner parts made of: 1.4301, sealing: PTFE , control medium: neutral gases, air media: water, air, vapor, oil, acids control pressure: 3 - 7 bar max. pressure difference between control pressure and water pressure: 16 bar