What pressure do you pump a foam eductor?
Eductors are typically pumped with a 200-psi inlet pressure. This is due to the high friction loss, roughly 30 percent, through the small Venturi area. The pick-up tube can be placed in a foam bucket or attached to a foam tank supply.
What is a foam eductor and how does it work?
An eductor is a device that uses the Venturi principle to introduce foam concentrate into the water stream. A metering valve is attached to an inlet to this chamber and when open allows the higher atmospheric pressure outside the chamber to push the foam concentrate into the chamber.
Which principle is used in foam eductor?
the venturi principle
Foam Eductor is a device that uses the venturi principle to introduce a proportionate amount of liquid concentrateinto a water stream. This venturi principle is used in the foam Eductors to induce foam or other liquid agents into a fire control stream.
What is inline eductor?
WILLIAMS FIRE & HAZARD CONTROL® (WILLIAMS) Inline Foam Eductors introduce a metered flow of foam concentrate into a pressurized water stream. The foam solution exits through the outlet of the inductor. The inline eductors achieve optimum performance with 200 psi (13.8 bar) inlet pressure.
How does an inline inductor work?
The basic function of this inline inductor is to inject foam concentrate into a water line. Each inline inductor is calibrated for a given fixed flow/pressure relation. It can be connected any- where in the main water line between the pressure water source and the foam generator(s).
How far can a foam eductor be from the nozzle?
Therefore we can stretch no more than 150 feet of 1¾” hose with a 100 PSI nozzle from the eductor to the scene.
What is air aspirating foam nozzle?
Air-aspirating nozzles are a more specialized nozzle that is designed to entrain air into the stream at a higher ratio than a typical fog nozzle. The types of air aspirating nozzles vary and are designed to flow various quantities of finished foam depending on the model.
What is Afff made of?
Synthetic foams Aqueous film forming foams (AFFF) are water-based and frequently contain hydrocarbon-based surfactant such as sodium alkyl sulfate, and fluorosurfactant, such as fluorotelomers, perfluorooctanoic acid (PFOA), or perfluorooctanesulfonic acid (PFOS).
What is tank eductor?
Tank Eductors (also referred to as circulating tank eductors & tank liquid agitators) provide an effective way to mix liquids in open or enclosed tanks. The tank eductor is also used to prevent separation of non-mixable liquids or stratification of liquids having different specific gravities.
How does an eductor pump work?
How does an eductor work? Basically the eductor, often referred to as a Venturi pump, is a simple device that converts pressure to velocity when a fluid (liquid or gas) is forced through a restriction in an enclosed line. This creates a partial vacuum in the eductor immediately after the orifice.
What is the proper proportioning of foam concentrate?
The proper proportioning of foam concentrate is another critical piece in the foam application process. Our goal is to mix the foam concentrate with the water in the proper ratio so that after it leaves the nozzles and is mixed further with air, it will offer a protective barrier that will separate the fuel vapors from the air.
Can I use the 125 eductors with gloves?
All controls are easy to use with gloves. The eductors are made of hardcoat anodized aluminum for corrosion protection. 125 Eductor Series are available in 60, 95, or 125 gpm models and have foam percentage settings of .25 %, .5 %, 1 %, 3 %, & 6 % allowing use with Class A or B foams.
What is the inlet pressure of a portable inline eductor?
The inlet pressure of the eductor varies with the manufacturer, but most operate at an inlet pressure of 200 PSI. The next bit of information will determine if your foam streams are successful or not. Backpressure becomes a serious issue with foam operations and the portable inline eductor.
Why choose Akron Brass foam firefighting equipment?
All of our foam equipment is designed with safety and ease-of-use in mind for quick fire suppression during any emergency. With a variety of brands to choose from, you can find the precise foam firefighting equipment for your department’s needs. For more information about how Akron Brass’ foam-related equipment can serve your needs