Product Name: Standard Response Fire Sprinkler for Fire Fighting Model NO.: ZST Wet Alarm Valve Structure: Seat Type Closed Fire Sprinkler System: Wet Fire Sprinkler System Automatically Opened and Closed Repeatedly: Can't Automatically Opened and Closed Alarm Valve Type: Wet Alarm Valve Sprinkler Head Type: Closed Sprinkler Installation: Pendent Nominal Diameter: Dn15 Response Temperature: 57deg;68deg,79deg,93deg,141deg Bulb Color: Orange, Red, Yellow, Green, Orchid, Purple Trademark: GAN Transport Package: Crate or Carton Origin: Shenzhen, China Product Description Standard Response Sprinkler (ZST Series)TheZST seriesstandard response sprinkleris the key unit in sprinkle system. It is consist of sprinkler, heat sensitive component (a glass bulb) and seal. It is installed in protection zone. The temperature of surroundings reaches the motion level when fire breaks up, the liquid in the glass bulb swells and then the glass bulb blasts. Thus, the seal drops and the sprinkler start to work.The sprinkler can detect fire and spray automatically. It is widely used to protect the restaurants, hotels, hospitals, theatre, shops, buildings, warehouses, underground garages and garment factories.This kind of sprinkler has many types to choose from. Types contain upright, pendent, conventional, vertical sidewall and horizontal sidewall. And there are two different aperture sizes for our products, one is 15mm and the bigger one is 20mm. Of course the aperture size can be manufactured as clients' demands. The bigger aperture sprinklers applied in cases where wider spray square is needed but pressure of water supply is not so high.Technical parameters:1. Rated working pressure: 1.2MPa.2. Diameter of glass bulb:Φ5mmRated temperature and color code:Notes: we make available costmozied design for our customer