Housing made of brass, EPDM seal, spring made of stainless steel. Nominal pressure: PN10, Max. operating temperature: 90 °C, Ambient temperature range: from -30 °C to +60 °C, Opening temperature: 3 °C, Closing temperature: 4 °C, Measurement accuracy: ± 1 K, Version G 1˝ Kv 55 m³/h, Discharge flow rate (3 bar): 1 l/h.