3H model B automatic sprinkler is a small, thermosensitive glass-bulb spray sprinkler which is available in various styles, finishes, temperature ratings and orifice sizes to meet varying design requirements. The heart of 3H model B sprinkler is an either 5mm or 3mm glass-bulb that contains a precisely measured amount of fluid and provide a pleasing aesthetic appearance. During fire conditions, the heat sensitive fluid in the glass-bulb expands, causing the bulb to shatter, this results in water discharge which is distributed in a pattern dependent upon deflector style used.
Specifications
- Material specifications:
- Frame: bronze
- Deflector: brass
- Screen: brass
- Bulbs seat: copper
- Seat: Teflon
- Bulb: glass with glycerin solution; 5mm or 3mm(quick release type); UL list EX4626(N)
- Other specifications:
- Orifice size: 3/8"(10mm); 7/16"(12.5mm); 1/2"(15mm)
- Nominal "K" factor: 2.8(39metric); 4.2(59metric); 5.6(80metric)
- Thread size: 1/2"NPT; 1/2"NPT; 1/2"NPT
- Length: 2 1/4"; 2 1/4"; 2 1/4"
- Finishes: factory bronze, stain chrome; bright chrome, white polyester; black polyester
- Finishes available of special order
- Technical Data: sprinkler temperature rating/classification and color coding, please refer to the table.
| Classification | Ordinary | Intermediate | High | Extra high |
|---|---|---|---|---|
| Available sprinkler temperatures | 135 Fahrenheit/155 Fahrenheit(57 Celsius/68 Celsius) | 175 Fahrenheit/200 Fahrenheit(79 Celsius/93 Celsius) | 286 Fahrenheit(141 Celsius) | 360 Fahrenheit(182 Celsius) |
| Bulb color | Orange/red | Yellow/green | Blue | Mauve |
| Frame color | Uncolored | White | Blue | Red |
| N.F.P.A maximum ceiling temperature | 100 Fahrenheit(38 Celsius) | 150 Fahrenheit(66 Celsius) | 225 Fahrenheit(107 Celsius) | 300 Fahrenheit(149 Celsius) |
Main Products
fire protection equipment including sprinkling system, ABC dry powder fire extinguishing agent, fire alarm system control panel, fire fighting system