Based on this product's specifications, here are some alternatives and similar models
Automatic Air Vent Valve Prestigio 1/2" 10 bar angled
Summary description:
Automatic air vent valve by Prestigio with 1/2" connection and 10 bar maximum pressure rating, designed in an angled configuration. Provides automatic release of trapped air from heating and domestic water systems to improve circulation and prevent noise or corrosion. Suitable for installation on radiators, manifolds and piping where reliable automatic air elimination is required.