The OS&Y valves are also installed to shut off certain sections of an individual floor. Being able to shut off parts of a building allows the Fire Department to have greater control over the fire protection system..
Herein, what is an OSY?
April 2012. 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.
what is the purpose of a post indicator valve? A post indicator valve functions to control the water flow to control fire systems such as hydrants and sprinklers that are located in or near public or private buildings, factories, and warehouses, to protect the structures from fires.
Likewise, people ask, what is a fire sprinkler control valve?
The Fire Sprinkler is also used to control the flow of water. It is essentially a valve that when exposed for a sufficient time to a temperature at or above the temperature rating of the heat sensitive element (glass bulb or fusible link) releases, allowing water to flow from only the affected sprinkler.
How does a deluge valve work?
A deluge fire protection system has unpressurized dry piping and open sprinkler heads. The system is directly connected to a water supply and when the system is activated, a deluge valve will release the water to all the open sprinkler heads. The valve is opened when activated by a heat or smoke detection system.
Related Question Answers
How do you know if a valve is open or closed?
When the handle of a ball valve is parallel to the valve or pipe, it's open. When it's perpendicular, it's closed. This makes it easy know if a ball valve is open or closed, just by looking at it. The ball valve below is in the open position.How do you Backseat a valve?
A backseat is a seating arrangement inside the bonnet. It provides a seal between the stem and bonnet and prevents system pressure from building against the valve pakking, when the valve is fully open. Back seats are often applied in gate and globe valves.How do you open and close a gate valve?
The proper way to open a gate valve is to gently turn the handle counter-clockwise (to the left) without applying excessive force – do not 'jerk' the handle. A typical 1″ main control valve for a water line will take about six full turns to fully open. Stop turning as soon as there is any resistance.Do gate valves restrict flow?
Gate valves When the gate is in the lowest position, it blocks the flow of water; when it's in the highest position, water can flow freely. Because they open and close slowly, gate valves won't create water hammer. They should be used only in the fully open and fully closed positions.What is the difference between rising and non rising stem gate valve?
What is the Difference between Rising Stem Gate Valve and Non-rising Stem Gate Valve? Rising stem gate valves are usually made from cast or forged steel while non rising stem gate valves are more typically brass, bronze or cast iron. Non rising stem valves take up less space and rising stem valves require more space.What does PIV valve stand for?
When control valves are located inside buildings, the outside stem and yoke (OS&Y) valve is commonly used. A postindicator valve (PIV) (photo 1) is commonly used as the valve operator for. automatic fire sprinkler and standpipe systems, where the system main valve is located. underground outside the building.What is an alarm check valve?
An alarm check valve is basically a check valve with an alarm port. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The valve should, (if properly maintained), help hold the system pressure steady and reduce the possibility of false alarms.What is a yoke in a valve?
The yoke is a clamp-type mounting, which is placed over the tank valve and then tightened into place. The DIN is a threaded valve, wherein you screw the regulator into the tank valve. On the yoke valve, the main O-ring that seals the tank valve to the regulator first stage is placed on the tank valve.Where is the main control valve located?
Every sprinkler system should be equipped with a main control valve located between the: Source of water supply and the sprinkler system.What impairment remains the leading cause of fire sprinkler system failure?
The NFPA also requires greater amounts of water and much larger piping and components to support the system water demand. What impairment remains the leading cause of fire sprinkler system failure? The leading cause of fire sprinkler system failure is fire sprinkler systems being shut off before.Why it is called jockey pump?
On a fire protection system requiring a fire pump, there is a small pump that maintains pressure above the pressure settings of the larger fire pump. Hence the name "jockey pump." The purpose of a jockey pump is to maintain pressure in a fire protection piping system so the larger fire pump does not need to run.How the fire sprinkler system works?
Fire sprinklers work because high heat triggers the sprinkler system. When a blaze ignites, the air directly above it heats rapidly. When the air is hot enough and reaches a sprinkler head, it triggers a chain reaction. Most sprinkler heads feature a glass bulb filled with a glycerin-based liquid.Where are post indicator valves normally located?
Answer: A post indicator valve is a post that sticks out of the ground about 3 to 4 feet and is usually located in a parking lot island. It has a “L” shaped handle which is locked to the side.What is the purpose of a Siamese connection?
Siamese connections are to be equipped with plugs or caps. This is to prevent dirt and other foreign objects from entering the piping, which would inhibit water flow or prevent the connection from being used during an emergency.What is a fire department connection used for?
The Fire Department Connection, also commonly known as the siamese connection, is an important component found on most sprinkler and standpipe systems. When a fire sprinkler system activates, the FDC provides a means for firefighters to connect hose lines to supplement the fire sprinkler system's domestic water supply.What is a PIV in plumbing?
Ames Fire & Waterworks - PIV - Post Indicating Valves Post Indicating Valves (PIVs) are designed to allow visual indication of a gate valve's position (open or closed), as well as the ability to open or close the valve from outside of a building or valve vault.What is a landing valve?
Landing Valve. Landing valves are suitable for installation on wet risers in buildings for fire fighting purposes, permanently charged with water from a pressurized supply. They are Globe valves that are installed on hydrants, a branch and hose is connected to a coupling on it.What is the difference between a wet pipe and a dry pipe fire suppression system?
In wet pipe systems, the overhead sprinkler piping connected is filled with water under pressure. Dry fire sprinkler systems, on the other hand, do not have water in the direct non-heated sprinkler piping, but only pressurized air or nitrogen. The pressurized air holds back the water supply at a main dry-pipe valve. 
