<span style="\\&quot;color:" rgb(9,="" 9,="" 11);="" font-family:="" roboto;="" font-size:="" 16px;="" white-space:="" pre-wrap;\\"="">Special Notes: 1. After 1000 hours of operation or 1 year, or 500 hours or 6 months of operation at high temperature (above 60°C) and with chemical agents: Check valve components (O-rings, gaskets, hose clamps, etc.) for damage. If necessary, contact the supplier to purchase replacement parts and replace them all. 2. After 3000 hours of operation or 3 years, or 1500 hours or 18 months of operation at high temperature (above 60°C) and with chemical agents: Contact the supplier to purchase replacement parts and replace all valve components (O-rings, gaskets, hose clamps, etc.).