Check valve 3/4" internal x internal thread ISO 228 with brass lock and seal.
Material:
Body - Brass CW617N - EN12165,
Closure - Brass CW617N - EN12165,
Washer - nitrile rubber NBR,
Screw - stainless steel 1.4301 / Inox AISI 304,
Max. Operating pressure: see table below,
Max. Operating temperature: + 110°C,
Min. Operating temperature: - 20°C,
Thread: ISO 228.
Graduated price:
1 - 10 pieces = € 6.58 / piece
11 - 20 pieces = € 6.49 / piece
more than 20 pieces = € 6.38 / piece
You can find the data sheet in "Media".

Link to product:
https://www.tiemme.com/deu/contabilizzazione/3660_contabilizzazione-det_11894.php