Caleffi iStop Anti-freeze Valve, Series 108, G 1" A (ISO 228-1) M Connection

Ensure the longevity and efficiency of your heat pump system with the Caleffi iStop Anti-freeze Valve, Series 108. This essential component is designed to safeguard your system against frost damage, providing reliable protection during cold weather conditions.

• Prevents Ice Formation: Effectively prevents ice formation in the system's circuit, especially crucial for heat pump installations.
• Automatic Drainage: Automatically drains the circuit medium (water) when the temperature drops to an average of 3 °C.
• Intermittent Operation: Closes the drain when the water temperature rises above 4 °C, minimizing water discharge and ensuring efficient operation.
• G 1" A (ISO 228-1) M Connection: Features a G 1" A (ISO 228-1) M (Male Threaded) connection for secure and standard fitting.
• High Working Pressure: Capable of handling a maximum working pressure of 10 bar, ensuring durability and reliability.
• Wide Temperature Range: Operates efficiently within a medium temperature range of 0–65 °C and an ambient temperature range of -30–60 °C.
• Brass Construction: Constructed from high-quality brass (Body: EN 12165 CW617N or CW724R-M; Closing element: EN 12164 CW617N) for corrosion resistance and long life.
• Stainless Steel Spring: Includes a stainless steel spring (EN 10270-3 (AISI 302)) for consistent and reliable performance.
• EPDM Seals: Utilizes EPDM seals for excellent sealing properties and resistance to environmental factors.
• High Flow Coefficient: Boasts a Kv (flow coefficient) of 55 m³/h (for 108601), ensuring efficient water drainage.
• Replaceable Vacuum Breaker: Comes with a replaceable vacuum breaker for easy maintenance and continued optimal performance.
• Replaceable Thermostatic Cartridge: Features a replaceable thermostatic cartridge, allowing for simple servicing and prolonged product lifespan.

The Caleffi iStop Anti-freeze Valve is engineered for mechanical protection, ensuring your heat pump system remains operational and undamaged during freezing conditions. With its precise temperature control and durable construction, this valve offers peace of mind and reliable performance. Trust Caleffi's Series 108 to safeguard your investment and maintain system efficiency.