Dry Pendent Sprinkler Heads

Name: China Dry Pendent Sprinkler Heads Manufacturers Suppliers Factory - CA-Fire Protection
Brand: CA-FIRE
SKU: 291885580

Dry pendent sprinkler heads function in dry fire systems, fitting low-temp areas (e.g., cold storage). On fire, their glass bulb breaks, triggering water flow via pipes to quickly extinguish flames and protect targeted spaces.

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Description

Ca-Fire Protection Co.,Ltd is one of the most credible manufacturers and suppliers of dry pendent sprinkler heads in China. Welcome to wholesale custom made fire equipment products at competitive price from our factory. Contact us for more cheap products.

dry pendent sprinkler heads

dry pendent sprinkler heads

Dry pendent sprinkler heads are core components of dry automatic sprinkler systems, tailored for low-temperature environments (e.g., cold storage, unheated industrial spaces) where wet systems risk pipe freezing.

In dry setups, pipes hold pressurized air (not water) normally; the sprinkler's sealed assembly preserves this state, avoiding frost damage. When a fire ignites, rising heat shatters the sprinkler's glass bulb (heat-sensitive element), breaking the seal. The system then expels air, floods with water, and discharges it downward via the pendent head.

Its downward-hanging design delivers wide coverage of the area below, quickly suppressing early flames to slow spread. It balances fire safety with cold-environment needs-preventing pipe freeze-ups while safeguarding assets (e.g., cold-storage perishables) and personnel in temperature-sensitive spaces.

dry pendent sprinkler heads--How often to inspect dry pendent sprinkler heads?

Dry pendent sprinkler heads are critical fire protection components in dry automatic sprinkler systems, engineered for cold environments like unheated warehouses and cold storage facilities where wet systems face pipe freezing risks. Normally, they seal pressurized air inside system pipes; when fire heat shatters their glass bulb, the seal breaks, air evacuates, and water flows through the downward-hanging head to douse flames, suppressing fires early to stop spread.

Inspection is vital to maintain this function: monthly visual checks confirm no physical damage, clogs, or glass bulb cracks, and that the pendent design remains unobstructed. Annual comprehensive inspections (per NFPA standards) verify seal integrity, air pressure compatibility, and proper alignment. Neglecting inspections can lead to failed activation during fires, undermining the sprinkler's core role of protecting temperature-sensitive spaces, assets, and personnel from fire hazards.

dry pendent sprinkler heads--What's the key difference between dry and wet pendent sprinkler heads?

Daily Maintenance Checks for Concealed Pendant Sprinkler Heads (Concealed State)

Internal Filling Medium

Wet pendent sprinkler heads are part of systems filled with water at all times. The water is ready to flow immediately once the sprinkler is activated. In contrast, dry pendent sprinkler heads operate in systems filled with pressurized air or nitrogen normally. Water only enters the pipes and flows out after the air is discharged when the sprinkler triggers, preventing pipe freezing in cold conditions.

Applicable Environments

Wet pendent sprinkler heads are suitable for spaces with stable temperatures above freezing, such as offices, shopping malls and residential buildings. They cannot be used in cold areas as water in pipes may freeze and burst pipes. Dry pendent ones are designed for low-temperature environments like cold storages and unheated warehouses, avoiding frost damage to the system.

Activation Response Speed

Wet pendent sprinkler heads have faster activation speed. Once the glass bulb breaks due to heat, water flows out instantly to suppress fire. Dry pendent ones have a slight delay. After activation, the system first releases the internal pressurized air, and water can only reach the sprinkler head afterward. This delay makes wet types more ideal for spaces needing quick fire response.

Maintenance Focus

Maintenance of wet pendent heads focuses on water quality and pipe corrosion, requiring regular checks for sediment accumulation and rust to avoid clogging. For dry pendent heads, the key is airtightness inspection. Technicians need to ensure no air leakage in pipes and that the sealing components work properly to maintain stable internal pressure and system reliability.

dry pendent sprinkler heads-Technical Parameter

dry pendent sprinkler heads Specification	dry pendent sprinkler heads Details
K Factor	K=5.6(K80) / K=8.0(K115)
Thread Size	R₂1/2"-1/2"NPT / R₂3/4"-3/4"NPT
Type	Pendent
Temperature sensing element	Glass bulb--Q3 or Q5
Frame Finish	Chrome Plated,Brass
Deflector Finish	Chrome Plated,Stainless steel
Certificate	ISO