What is the purpose of isolation valve in fire line?

What is the purpose of isolation valve in fire line?

An Isolation Valve is used in fluid management to stop the flow of process fluids in a pipeline, this is usually for maintenance or safety purposes.

How does an isolation valve work?

A diaphragm isolation valve—also known as a “membrane valve”—is a solenoid-operated device that uses a diaphragm that extends and retracts to seal the valve seat and isolate the flow path. Like rocker style valves, diaphragm isolation valves can also be configured as simple on/off 2-way or 3-way devices.

What is an isolating check valve?

An isolation valve is a valve in a fluid handling system that stops the flow of process media to a given location, usually for maintenance or safety purposes. A valve is classified as an isolation valve because of its intended function in a system, not because of the type of the valve itself.

What type of valve is likely to be used as isolation valve on a fire line?

Block and Bleed Valve Double block and bleed valves primarily used for shutting off the upstream process and bleeding off the fluid or pressure of the system. DBB style valves are suitable for isolation, calibration, and venting purposes.

What are the types of isolation valve?

Gate, globe, ball, butterfly, play, and diaphragm valves are all types of stop or isolation valves. These all valves used for isolation of fluid in a pipeline.

Does fog extinguish fire?

Flames are actually the burning gases liberated by the heated fuels. Water, dirt, foam and retardants will reduce the supply of oxygen for the combustion process. With water, use a fog nozzle. It smothers the fire by completely coating the fuel with water in the form of foam.

Do isolation valves restrict flow?

If you are looking to fit isolation valves to outlets (not central heating), then: 1. If the outlet is on a high pressure (1 bar or greater) pressure, then you can probably get away with a normal isolation valve. The exception is for a bath filler or high volume shower, where a full bore valve would not reduce flow.

What is the difference between a service valve and an isolating valve?

Servie valves are located at a water outlet, taps, showers, cisterns etc and isolation valves isolate a number of appliances like a bathroom or kitchen etc.

What is the difference between an isolation valve and check valve?

Although check valves can effectively shut off reverse flow, they should never be used in place of an isolation valve to contain live steam, in a section of pipe. As with isolation valves, there are a number of different check valve designs, each suited to specific applications.

What is the difference between isolation valve and gate valve?

Both ball valves and gate valves are isolation valves that offer a degree of flow regulation. They use a quarter turn of the handle to turn the ball horizontally to block off the bore that allows fluids to flow. By contrast, a gate valve uses a plate, disc, or wedge to interrupt or allow flow stream.

What is the best type of valve to use for isolation?

Gate Valves are used specifically in isolation applications in different piping systems, and they also operate fully when they are in opened or closed positions.

What is the purpose of an isolating valve in a fire line?

Do you mean “What is the purpose of an isolating valve in a fire line on a ship?” In a ship’s ring main (if so fitted, not all ships have them), then if damage is caused at one or more points in the ring, the damaged section can be isolated by the isolation valves.

What is an isolation valve on a ship?

In a ship’s ring main (if so fitted, not all ships have them), then if damage is caused at one or more points in the ring, the damaged section can be isolated by the isolation valves. These are common on FPSOs and other offshore structures.

When are subsea pipeline emergency isolation valves required?

Subsea pipeline emergency isolation valves for offshore facilities are provided where a facility risk analysis indicates a topside isolation may be considered vulnerable.

How far should an isolation valve be from a building?

They should be accessible from two directions such as stairways on both ends of platforms when the isolation valves are in an overhead pipe rack. They should be located at least 15 m from the hazard the valve is intended to isolate. They may need to be placed behind a screen or berm.