If you're specifying fire shutters for a project in Heyuan, here are the key parameters and what they mean in practical terms.
Fire resistance rating: Expressed in hours. F3 means 3 hours, F4 means 4 hours. This is the duration the shutter must maintain its integrity and insulation when tested according to GB 14102. The F4 rating is typically required for special-grade fire shutters. Most standard fire compartment applications use F3.
Opening dimensions: Width times height in meters. The shutter is manufactured to the measured opening plus allowances. Width: opening width plus rail embedment. Height: opening height plus headroom for the rolled curtain. Always specify whether the dimensions are the opening size or the shutter size. Confusion here causes expensive mistakes.
Curtain type: GYF for steel composite fire shutter. TFJ for special-grade inorganic fabric fire shutter. The choice depends on the span, architectural requirements, and fire strategy. Steel is used for smaller openings with security needs. Fabric is used for large spans, atriums, and where weight is a concern.
Operating mode: The control logic. Standard mode: fire signal triggers automatic descent, manual reset required. Semi-automatic: descent is automatic, reset can be done remotely. Full automatic: descent and reset both automatic. Most installations use standard or semi-automatic.
Control voltage: 24V DC for the control circuit is standard. Some older installations use 220V AC control, but this is being phased out for safety reasons. The motor power voltage is typically 380V three-phase or 220V single-phase, depending on motor size.
Signal interface: The fire alarm input is typically a dry contact, normally open or normally closed, configurable. The feedback output is also dry contact, indicating the shutter's position. Make sure the signal types match the building's fire alarm panel requirements.
Power consumption: Motor power in kW. A 1.5kW motor draws about 3.5 amps at 380V three-phase. Factor this into the building's electrical load calculation, especially if multiple shutters could operate simultaneously.
Weight: Important for structural engineering. A steel fire shutter weighs about 25 to 35 kg per square meter. A 5 by 3 meter steel shutter weighs roughly 400 to 500 kg. The supporting structure must handle this plus dynamic load.
Endurance: Test cycles. GB 14102 requires fire shutters to survive at least 500 operation cycles without failure for standard duty. For frequent operation (like shutters in daily-use corridors), specify higher endurance.
These parameters go into the specification sheet. When getting quotes, make sure every supplier is quoting against the same spec sheet. Otherwise you're comparing apples to pears.