This brass valve is a reliable choice for HVAC service technicians looking for a 1/2" unangled valve with a 1.8CV capacity and normally open function. The Johnson Controls VG7551ET model is designed to provide efficient and precise control of fluid flow in various heating, ventilation, and air conditioning systems. Its durable construction ensures long-lasting performance, while its easy-to-use design makes installation and maintenance hassle-free. With this valve, technicians can trust that their systems will operate smoothly and effectively.