{"product_id":"esbe-vtn102-dn25-anti-freeze-valve-g-1-external-thread","title":"ESBE VTN102 DN25 G1 Anti-Freeze Valve 3°C | 35100100","description":"\u003c!-- SEO Product Name: ESBE VTN102 DN25 G1 Anti-Freeze Valve 3°C | 35100100 | PN10 --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#222222; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"margin:0 0 14px 0;\"\u003eThe \u003cstrong\u003eESBE VTN102 DN25 anti-freeze valve\u003c\/strong\u003e (G 1” external thread) is a \u003cstrong\u003efail-safe frost protection valve for monobloc air-to-water heat pumps\u003c\/strong\u003e. If there is a \u003cstrong\u003epower outage in cold weather\u003c\/strong\u003e, it protects the \u003cstrong\u003eheat pump and plate heat exchanger\u003c\/strong\u003e from freezing and splitting by \u003cstrong\u003eautomatically draining water once the water temperature falls to 3°C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px 0;\"\u003eIt needs \u003cstrong\u003eno power, no controller and no manual reset\u003c\/strong\u003e. A \u003cstrong\u003eprecise wax element\u003c\/strong\u003e drives a piston with an \u003cstrong\u003eaxial sealing element\u003c\/strong\u003e, so the valve \u003cstrong\u003eopens at 3°C ±1°C\u003c\/strong\u003e and \u003cstrong\u003ecloses again at 4°C ±1°C\u003c\/strong\u003e. Warmer water is drawn in as the valve drains, so the system is \u003cstrong\u003eprotected without draining instantly\u003c\/strong\u003e, and an \u003cstrong\u003eanti-vacuum valve\u003c\/strong\u003e lets all the water drain when needed. The \u003cstrong\u003ebrass body\u003c\/strong\u003e is rated \u003cstrong\u003ePN10\u003c\/strong\u003e, with a \u003cstrong\u003e0°C to 90°C\u003c\/strong\u003e working range and \u003cstrong\u003e-30°C to +60°C\u003c\/strong\u003e ambient range, and it is \u003cstrong\u003emaintenance free\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:10px; margin:20px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003e3°C ±1°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003eOpening temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003e4°C ±1°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003eClosing temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003e2 l\/min\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003eDischarge at 1°C and 3 bar\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003ePN10\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003e10 bar max. working pressure\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003e0 to 90°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003eWorking temperature range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; text-align:center; background:#f1f8f7; border-top:4px solid #008377CF; padding:12px 8px; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:bold; color:#008377CF;\"\u003e-30 to +60°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444444;\"\u003eAmbient temperature range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:6px solid #b3261e; background:#fdecea; padding:12px 16px; margin:14px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#b3261e; margin-bottom:4px;\"\u003eCheck local regulations and discharge route\u003c\/div\u003e\n\u003cdiv\u003eThe valve \u003cstrong\u003edischarges water when it opens\u003c\/strong\u003e. ESBE states that regional and national regulations must be checked before the product is used in any application, and the discharge must be sited and routed safely. Follow the \u003cstrong\u003eheat pump manufacturer's installation instructions\u003c\/strong\u003e for frost protection.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:6px solid #a06a00; background:#fff6e0; padding:12px 16px; margin:14px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#a06a00; margin-bottom:4px;\"\u003eWater temperature sensing only\u003c\/div\u003e\n\u003cdiv\u003eThe VTN102 responds to the \u003cstrong\u003ewater temperature alone\u003c\/strong\u003e. ESBE's separate VTN200 series adds a second \u003cstrong\u003eambient temperature sensor\u003c\/strong\u003e that stops draining when there is no freezing risk. Choose the \u003cstrong\u003eDN25 (G 1”)\u003c\/strong\u003e size to match the connections on your monobloc heat pump, and install it \u003cstrong\u003evertically within ±45°\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:6px solid #008377CF; background:#f1f8f7; padding:12px 16px; margin:14px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:4px;\"\u003eHow it works\u003c\/div\u003e\n\u003cdiv\u003eWhen the water falls below \u003cstrong\u003e3°C\u003c\/strong\u003e the valve starts to evacuate water, letting warmer water reach the valve. It \u003cstrong\u003ecloses again at 4°C\u003c\/strong\u003e, with \u003cstrong\u003eno resetting\u003c\/strong\u003e needed once the temperature recovers.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:20px; color:#008377CF; margin:30px 0 12px 0; padding-bottom:6px; border-bottom:2px solid #008377CF; font-weight:bold;\"\u003eKey features\u003c\/h3\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:14px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eNo power needed\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003eWorks \u003cstrong\u003epurely thermostatically\u003c\/strong\u003e with a precise wax element, so it protects the heat pump \u003cstrong\u003eeven during a power cut\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eAutomatic reset\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003eThe valve \u003cstrong\u003ecloses by itself\u003c\/strong\u003e when the water warms to 4°C. \u003cstrong\u003eNo manual reset\u003c\/strong\u003e and no re-filling of the valve is needed.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eAxial seal and piston\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003eAn \u003cstrong\u003eaxial sealing element\u003c\/strong\u003e with a piston gives consistent compression, reducing the risk of the valve \u003cstrong\u003eleaking or sticking\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eAnti-vacuum valve\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003eAllows air in so that \u003cstrong\u003eall the water can drain\u003c\/strong\u003e from the outdoor circuit when required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eRobust brass construction\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003e\n\u003cstrong\u003eBrass body\u003c\/strong\u003e, \u003cstrong\u003eEPDM O-ring\u003c\/strong\u003e and \u003cstrong\u003estainless steel spring\u003c\/strong\u003e, rated \u003cstrong\u003ePN10\u003c\/strong\u003e for heating water to VDI 2035.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; border:1px solid #cfe5e2; border-top:4px solid #008377CF; border-radius:4px; padding:12px 14px; background:#ffffff;\"\u003e\n\u003cdiv style=\"font-weight:bold; color:#008377CF; margin-bottom:6px;\"\u003e\u003cstrong\u003eMaintenance free\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px;\"\u003eNo maintenance is required under normal conditions. Fits \u003cstrong\u003eG 1” external thread\u003c\/strong\u003e connections and mounts \u003cstrong\u003evertically ±45°\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:20px; color:#008377CF; margin:30px 0 12px 0; padding-bottom:6px; border-bottom:2px solid #008377CF; font-weight:bold;\"\u003eTechnical specification\u003c\/h3\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eProduct identification\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eESBE\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eModel\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eVTN102 anti-freeze valve, DN25\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eManufacturer part number\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e35100100\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eEAN\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e7330193060844\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eSeries\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eVTN100\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eApplication\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eFrost protection for monobloc heat pumps\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eOperation\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eOpening temperature (media)\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e3°C ±1°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eClosing temperature (media)\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e4°C ±1°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eDischarge flow rate\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e2 l\/min at 1°C and 3 bar (Kvs 0.07 m3\/h at 1°C)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eReset\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eAutomatic, no manual reset\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eRatings\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003ePressure class\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003ePN10\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eMaximum working pressure\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e10 bar\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eWorking temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e0°C to 90°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eAmbient temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e-30°C to +60°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eMedia\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eHeating water (VDI 2035)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eConstruction\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eValve body\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eBrass\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eO-ring\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eEPDM\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eSpring\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eStainless steel\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eConnections\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eExternal thread G 1”, ISO 228\/1 B\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eNominal size\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eDN25\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eMounting\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003eVertical, within ±45°\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eDimensions and weight\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eA\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e58 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eB\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e123 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eC\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e73 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#ffffff; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003e0.35 kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #008377CF; border-radius:4px; margin:14px 0; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:bold; padding:8px 14px;\"\u003eCompliance\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; padding:8px 14px; background:#f1f8f7; border-bottom:1px solid #d9e8e6;\"\u003e\n\u003cdiv style=\"flex:1 1 200px; font-weight:bold; color:#008377CF;\"\u003ePressure equipment\u003c\/div\u003e\n\u003cdiv style=\"flex:2 1 260px;\"\u003ePED 2014\/68\/EU, Article 4.3\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:20px; color:#008377CF; margin:30px 0 12px 0; padding-bottom:6px; border-bottom:2px solid #008377CF; font-weight:bold;\"\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eAt what temperature does the valve open and close?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003eIt \u003cstrong\u003eopens at 3°C ±1°C\u003c\/strong\u003e water temperature and \u003cstrong\u003ecloses at 4°C ±1°C\u003c\/strong\u003e. It starts draining water, letting warmer water reach the valve, and \u003cstrong\u003erecloses automatically\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eDoes it need electrical power or a controller?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003e\n\u003cstrong\u003eNo.\u003c\/strong\u003e It is a \u003cstrong\u003epurely thermostatic safety valve\u003c\/strong\u003e with a wax element, so it still works during a \u003cstrong\u003epower outage\u003c\/strong\u003e, which is exactly when frost damage is most likely.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eDo I need to reset it after it has operated?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003e\n\u003cstrong\u003eNo manual reset is needed.\u003c\/strong\u003e As the water temperature rises again the valve closes by itself.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eWhich size should I choose?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003eMatch the \u003cstrong\u003econnection size of your monobloc heat pump pipework\u003c\/strong\u003e: \u003cstrong\u003eDN25 with G 1” external threads\u003c\/strong\u003e for this model. ESBE also makes the VTN102 in the other pipe size.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eHow should it be installed?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003eInstall it \u003cstrong\u003evertically, within ±45°\u003c\/strong\u003e, on the outdoor circuit of an air-to-water monobloc heat pump, following the heat pump manufacturer's instructions and local regulations.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #008377CF; border-radius:6px; margin:8px 0; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; cursor:pointer; font-weight:bold;\"\u003eDoes it replace antifreeze or glycol?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;\"\u003eIt is a \u003cstrong\u003esafety valve for power-outage conditions\u003c\/strong\u003e, not a substitute for the \u003cstrong\u003efrost protection method specified by the heat pump manufacturer\u003c\/strong\u003e. Always follow the manufacturer's guidance for your system.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"ESBE","offers":[{"title":"Default Title","offer_id":67577465602438,"sku":"VTN102-DN25","price":93.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/vtn102-25.jpg?v=1791291427","url":"https:\/\/qualityheating.co.uk\/products\/esbe-vtn102-dn25-anti-freeze-valve-g-1-external-thread","provider":"AIZO Quality Heating","version":"1.0","type":"link"}