Fire Valves are devices used to control the flow, pressure, and direction of fluids, often referred to as valves. The controlled fluid can be a liquid, gas, a gas-liquid mixture, or a solid-liquid mixture. A valve typically consists of a valve body, a bonnet, a valve seat, opening and closing components (disc, plug, gate, butterfly plate, diaphragm, etc.), a drive mechanism (valve stem and the valve actuator that drives it), seals (packing, gaskets, etc.), and fasteners. The valve's control function is achieved by using the drive mechanism or fluid to cause the opening and closing components to move upward, downward, downward, downward, downward, or downward, thereby changing the flow area.
1. Fire damper: Installed in the supply and return air ducts of ventilation and air conditioning systems, it is normally open. In the event of a fire, it automatically closes when the smoke temperature in the duct reaches a certain level. It can also be closed manually or electrically, acting as a smoke and fire barrier. 2. Fire Damper Installation Locations
1) Where fire compartments are crossed
2) Where ventilation and air conditioning rooms and fire control rooms are crossed through room walls and floors
3) Where fire compartments are crossed through room walls and floors in critical or high-fire-hazard locations
4) On both sides of expansion joints between fire compartments
5) On the horizontal section where vertical ducts meet horizontal ducts on each floor. However, if ventilation and air conditioning systems are installed independently for each fire compartment within a building, fire dampers may not be installed at the junction of horizontal ducts and vertical main ducts.
6) Vertical exhaust ducts in bathrooms, toilets, and kitchens in public buildings should be protected against backflow and should be equipped with fire dampers with a nominal operating temperature of 70°C on their branches. Kitchen exhaust ducts in public buildings should be located according to fire compartments, and fire dampers with a nominal operating temperature of 150°C should be installed at the branches connecting to the vertical exhaust ducts.
| Aspects | Fire Protection Valve | Fire Damper |
|---|---|---|
| Operating Principle | Automatically controlled, opens or closes water passages based on changes in water pressure and temperature | Automatic safety device, prevents the spread of smoke and flames |
| Application Scenarios | Fire protection systems, fire water pipelines in various buildings | Air conditioning and ventilation ducts in buildings, fire compartment areas |
| Functional Design | Fast response, precise control, safety lock function | Safety and reliability, multiple opening and closing types, check valve function |
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