Based on this product's specifications, here are some alternatives and similar models
Pressure relief valve SOL-ARM KOREK PE 32, model PE-67-032 (32 mm)
Summary description:
SOL-ARM KOREK PE 32 is a pressure relief/air release valve designed for heating and solar systems with a 32 mm connection. Model PE-67-032 fits standard pipe interfaces and ensures controlled pressure relief and system protection. Suitable for circulation, boiler and solar loop use where safe pressure management and venting are required.