What is the purpose of a PIV valve?
What is the purpose of a PIV valve?
Post indicator valves (PIV) play an important role in a fire protection system, opening and closing the water supply from outside the building.
What is the function of a PIV?
Also known as PIV, indicator post, I post, IP, post indicator, or wall post, a post indicator valve is a valve assembly used for the purpose of underground piping for water supply to fire protection systems such as sprinklers, sprays, foams, deluges, etc.
How does a PIV valve work?
In a standard PIV, the post body is mounted on top of the fire sprinkler/standpipe system’s water supply pipe. Inside the post body, the gate valve connects to the underground water supply pipe’s shut off valve. The gate valve is then controlled by the wrench actuator/handle, which is on the exterior of the post body.
What is an OS&Y valve?
One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve.
Which is a characteristic of outside screw and yoke OS&Y valves?
An OS&Y Valve (outside screw & yoke) functions by opening and closing via a gate, which lowers both in and out of the valve. When the handle is turned clockwise the gate will close preventing any water from traveling through the valve.
What sprinkler systems are used in areas where the temperature is?
A wet fire sprinkler system has water in the piping and therefore is only used in areas where the ambient temperature is above 32˚F. In some cases where partial piping is exposed to freezing temperatures, such as a small loading dock, an antifreeze loop can be used.
What do the colors mean in the glass bulb beads?
The colour codes seen above relate to the glass bulb colour. Ordinary sprinkler systems have orange or red bulbs. Intermediate, yellow or green. High temperature bulbs are coloured in blue up to 246 degrees Celsius, then purple up to 302 degrees Celsius, and black for anything above.
What is the most common sprinkler system?
Wet pipe systems
What is the difference between upright and pendent sprinklers?
Standard spray, upright/pendent. Upright sprinklers are installed with deflectors above the sprinkler, while pendent sprinklers have deflectors below the sprinklers. Common industry practice is to use upright sprinklers in areas without finished ceilings and pendent sprinklers in areas with finished ceilings.
Can a homeowner install their own fire sprinkler system?
According to the California Contractor State License Board and California Assembly Bill No: AB433, only C-16 contractors (Fire Sprinkler), plumbers (C-36) or owner-builders of owner- occupied, single family dwellings may install residential NFPA 13D fire sprinklers.
Where should I place my pendent sprinkler?
Pendant sprinklers are mostly used in office buildings where obstructions to water spray are minimal.
What liquid is in fire sprinklers?
When a sprinkler head has a glass bulb, that bulb typically contains a glycerin-based liquid. Once the air around the sprinkler reaches a certain temperature – often 155F or 200F (68C or 93C) – the liquid expands which causes the glass to break.
Can you set off a fire sprinkler by touching it?
No. A sprinkler can only be set off by heat (fire) or force (object striking the sprinkler). Each sprinkler can only be triggered individually.
Why is fire sprinkler water black?
By far the most common corrosion reaction found in fire sprinkler systems is oxidation. Oxygen trapped inside the system dissolves into water and reacts with the internal surface of the black or galvanized steel piping.
Do fire sprinklers work without electricity?
Wet pipe fire sprinkler systems, as the name suggests, are filled with water under pressure. These systems are most effective in places where freezing isn’t a concern, and they rely on a pressure release valve rather than electricity to work effectively and put out the fire.
Do sprinklers use a lot of electricity?
Answer – A typical irrigation system uses electricity to power the controller (timer) which turns the valves on and off. Some systems also use electricity to power a pump. A 100 watt light bulb that is turned on 8 hours a day uses 0.8 Kwh of electricity. So you can see an irrigation system uses very little electricity.
How much does it cost to have sprinkler system turned on?
The cost to winterize or activate a sprinkler system ranges from $53 and $115, or $83 on average. Maintenance during the irrigation season averages about $115, on top of these expenses. To keep your sprinkler system working properly, it must receive regular maintenance from a professional plumber.
Do fire sprinklers react to smoke?
Smoke will not activate sprinklers. Sprinklers are so effective because they react so quickly. In less time than it typically takes the fire department to arrive on the scene, sprinklers contain and even extinguish a home fire.