top of page




Under our Delta Tech Group, Grille roller shutter can be in aluminium or stainless steel finishing. It is widely used for security because of its light weight, corrosion resistance properties yet retaining solid strength for security. With its unique feature further allow excellent air circulation and vision. It is commonly installed in places such as shop houses, MRT, industrial, stalls, HDB and building entrances.


  • Grille curtain uses mild steel rod as the curtain frame and dressed with aluminium or stainless
    steel finishing

  • Single span up to 15m x 10m in dimension

  • Manually operated by hand chain 

  • Automatically operated by control box

  • With at least 80% clear, Grille curtain allow circulation and provide excellent vision

  • Intelligent System (IS) has a built-in Brake Re-engagement  Device that stops the shutter once it touches the ground 




Shutter Curtain 

The grille slats comprise of a 9mm thick steel rod inserted in a 12.5mm thick aluminium tubing and they are linked up by link chains of 19mm (width) x 2.5mm (thickness). The overall nominal pitch distances shall be 80mm (height) x 200mm (width).

Side Guides

Side guides are installed at both ends vertically to guide the shutter curtain in its position during opening and closing. It consists of customized ‘U’ shaped profile made up of 2mm electro-galvanized steel with a lipped opening for the curtain slats. The side guide shall take an overall nominal dimension of 70mm (width) x 80mm (depth).

Bottom Bar

The bottom bar shall be constructed of extruded double walls aluminium inverted ‘T’ shaped bar. It is the last slat which is situated at the bottom of the entire curtain and it is used to maintain the door rigidity. Underneath the bottom bar, there shall be two groves to allow PVC rubber weather seal to be slotted in for weather proofing.


Roller Barrel

It shall only consist of a single heavy-duty steel pipe, forming only a single barrel. The drive assembly is made up of steel circular plates fitted to the steel solid shaft round bar on one end and a circular plate with tri-legged slot on the other end.


Shutter Hood

The frame is fabricated from 35mm by 35mm angle bars forming a truss frame, with 0.8mm colourbond steel sheet cover; to conceal the shaft assembly.  The shutter hood’s dimensions shall be between 365mm to 600mm in both height and depth.

Shutter Operation 


Each fire shutter shall be equipped with only 1 motorized operator. The shutter operator is equipped with built-in limit switch, built-in thermal protector, built-in brake release system, manual hand chain, and one unit of 3-ways push button (Up, Stop, Down) switch with cylinder lock integrated in a stainless steel cover. The limit switch shall ensure the shutter stops automatically at desired levels. In the event of power failure, the shutter can be operated manually by pulling the hand chain.

Power Requirements

The power source shall be single phase 230V x 13amp or 3-Phase 415V x 20amp, 50Hz each, depending on the size of the shutter. 

Operating System

Motorized roller shutter can be operated by using the push button, which is located approximately 1.5metres above floor level without counter balance system.

Manual Hand Chain

The hand chain is provided to manually operate the roller shutter curtains in times of power or motor failure. It consists of a gear reduction chain block.

bottom of page