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concealed sprinkler

Concealed Sprinkler

Concealed Sprinkler are aesthetically designed fire sprinkler heads featuring a hidden design behind a flat cover plate.

The cover plate is heat-sensitive and detaches at a specific temperature, exposing the sprinkler for activation.

These are ideal for premium interiors such as hotels, offices, residential apartments, showrooms, malls, and luxury spaces where appearance is a priority.
They come in quick-response models with multiple K-factors, temperature ratings, and custom finish cover plates.

Concealed Fire Sprinklers are aesthetically designed sprinkler heads installed flush with the ceiling, covered by a decorative, heat-sensitive cover plate. When the ambient temperature increases to the cover-plate rating, the plate detaches, allowing the sprinkler to activate. Concealed sprinklers deliver reliable fire protection while maintaining a clean, unobtrusive ceiling finish. They are commonly used in hotels, residential buildings, offices, malls, showrooms, theaters, and luxury interiors.

Concealed Sprinkler Categories

  • Fire Fighting Equipment

  • Fire Sprinkler System Components

  • Concealed Type Sprinklers

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  • Quick Response Sprinklers

  • Residential Sprinklers

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Concealed Sprinkler Description

Standard: ANSI/ UL 199
K factor: K 5.6
Response: Standard / Quick
Thread: NPT/ BSPT
W. pressure: 175 psi (1.21 MPa)
Finish: White/ customized (cover plate)

Temp. Rating Approvals
68°C (155°F) for Sprinkler bulb & 57°C (135°F) for Cover Plate, for Quick Response Sprinkler. 57°C & 68°C (135° & 155°F) for Sprinkler bulb & 57°C (135°F) for Cover Plate, for Standard Response Sprinkler.
79°C & 93°C (135° & 155°F) for Sprinkler bulb & 68°C (155°F) for Cover Plate for Standard Response Sprinkler.

Technical Specifications

Available K-Factors
  • K4.2

  • K4.9

  • K5.6

  • K5.8 (Extended Coverage)

Thread Size
  • 1/2″ NPT

  • 3/4″ NPT (High K-Factor / EC models)

Response Type
  • Quick Response (QR)

  • Standard Response (SR)

Working Pressure
  • Maximum Working Pressure: 175 psi (12 bar)

  • Factory Hydrostatic Test: 500 psi (34.5 bar)

Water Distribution Pattern
  • Pendent-type discharge pattern

  • Designed for installation in concealed ceilings

  • Uniform water distribution for residential & commercial fire protection

  • Optimized for low-to-medium ceiling heights

Concealed Sprinklers (Sizes + SKU Codes)

ModelK-FactorThread SizeTemp RatingCover Plate TempFinishSKU Code
Concealed Sprinkler – QRK4.21/2″ NPT68°C57°CWhiteCSC-42-12-68-57-WH
Concealed Sprinkler – QRK5.61/2″ NPT68°C57°CChromeCSC-56-12-68-57-CR
Concealed Sprinkler – SRK5.61/2″ NPT79°C68°CWhiteCSC-56-12-79-68-WH
Concealed Sprinkler – QRK4.91/2″ NPT68°C57°CCustom RALCSC-49-12-68-57-CRL
Extended Coverage ConcealedK5.83/4″ NPT93°C79°CWhiteCSC-58-34-93-79-WH
concealed sprinkler

Size Description Sprinkler

No.SizeGalv/BlackDes
55-56201/2K-F 5.6/Chrome
55-56213/4K-F 8.1/Brass

Installation Requirements

  • Install per NFPA 13 / NFPA 13R / NFPA 13D

  • Concealed type must be installed flush with ceiling

  • Do not install without cover plate

  • Maintain gap and spacing as per manufacturer’s specification

  • Suitable only for pendent orientation

  • Use correct temperature rating based on ambient conditions

Sample Time: Available in 5-10 days for different items.

Drawing Format: CAD / PDF / DWG / IGS / STEP.

Packaging: Standard package, Carton box or Pallet, As per customized specifications

Shipping: DHL, FEDEX, UPS and By Sea or as per client’s requirements.

Any kind of Concealed Sprinkler can be developed and supplied exactly as per customer specifications.