Vertical F-F type check valve made of brass. Suitable for use in plumbing, pneumatic, heating installations, and air conditioning systems. Body: brass UNI EN 12165CW617N. Spring: stainless steel. O-ring: NBR. Disc: AISI 304 stainless steel. Disc seat: NBR. Threads: ISO 228. Operating temperature: -20°C to +100°C.