Materials: 
Type Brass: valve body: Red bronze (21/2" to 3": brass), seat sealing: PTFE, spindle seal: NBR, control cylinder: brass / aluminium, spindle: Stainless steel, seals: NBR 
Type 1.4408: valve body: 1.4408, valve internal parts: 1.4301, seat and spindle seal: PTFE, control cylinder: Nickel-plated brass / aluminium, spindle: Stainless steel, seals: FKM 

Temperature range: 
-20°C to max. +85°C (Type 1.4408: -40°C to max. +200°C) 

Control pressure: 
4 - 10 bar (6 bar optimal), control connection: G 1/8" 

Flow direction: 
Closes with media flow (not recommended for liquids with high flow velocity). If necessary, use the -GS option to close against the media flow. 

Optional: 
PTFE spindle seal (up to 200°C) -PTFE**, Version closes against the medium stream (for use with liquids), please ask about working pressures. -GS, control cylinder made of stainless steel 1.4581 with FKM seals -2A***