nozzle reaction safety valve for sale

The new TFT Working Fire nozzle delivers revolutionary performance when you need maximum flows for a “working fire.” For everyday use, it is a 150 gpm @ 75 psi Fixed GPM Nozzle, but when you need even more GPM, the nozzle’s exclusive pressure relief system dramatically limits nozzle reaction.

The exclusive TFT pressure relief feature maximizes GPM when you over pump the nozzle. The pressure relief feature keeps reaction force manageable as GPM increases versus a nozzle without a pressure relief feature that builds up massive nozzle pressure and reaction force.

At low flows, just like every other fixed GPM nozzle, it is clear from the stream quality that optimum flow has not yet been reached. When you achieve the 150gpm rate, the nozzle flows great, and there is about 65lbs of nozzle reaction force. However when you need a lot more GPM, that is where the Working Fire excels. By integrating pressure relief, a 33% increase in flow rates only yields a 33% increase in reaction force. Compare that to a traditional fixed nozzle, which increases 78%. With the Working Fire nozzle, TFT is able to deliver high GPM (200 gpm) with about 30lbs less reaction force than other nozzles!

nozzle reaction safety valve for sale

The new TFT Working Fire nozzle delivers revolutionary performance when you need maximum flows for a “working fire.” For everyday use, it is a 150 gpm @ 75 psi Fixed GPM Nozzle, but when you need even more GPM, the nozzle’s exclusive pressure relief system dramatically limits nozzle reaction.

At low flows, just like every other fixed GPM nozzle, it is clear from the stream quality that optimum flow has not yet been reached. When you achieve the 150gpm rate, the nozzle flows great, and there is about 65lbs of nozzle reaction force. However when you need a lot more GPM, that is where the Working Fire excels. By integrating TFT’s exclusive pressure relief, a 33% increase in flow rates only yields a 33% increase in reaction force. Compare that to a traditional fixed nozzle, which increases 78%! With the Working Fire nozzle, TFT is able to deliver high GPM (200 gpm) with about 30lbs less reaction force than other nozzles!

nozzle reaction safety valve for sale

The TFT Working Fire nozzle delivers revolutionary performance when you need maximum flows for a “working fire.” For everyday use, it is a 150 GPM @ 75 psi or 160 GPM @ 50 PSI fixed GPM nozzle, but when you need even more GPM, the nozzle’s exclusive pressure relief system dramatically limits nozzle reaction.

At low flows, just like every other fixed GPM nozzle, it is clear from the stream quality that optimum flow has not yet been reached. When you achieve the rated flow of the nozzle, it operates as any other [email protected] 50 or 150 @ 75 fixed flow nozzle. However, when you need more GPM, this is where the Working Fire Nozzle excels.

By integrating pressure relief, reaction force is limited when flow rate increases above the rated 160 or 150 gpm respectively. The Working Fire Nozzle provides you up to 45% less nozzle reaction force at higher flows.

The Pressure Relief Feature is only active above 150 GPM or 160 GPM and limits reaction forces when GPM increases above the rated 150 GPM or 160 GPM. The Working Fire Nozzle is designed to send more water to the seat of the fire when you need it and still have a manageable attack line.

nozzle reaction safety valve for sale

Process Valves and Safety Valves for Air, Steam, and Water We carry Farris Valves and parts for air, steam, and water processing operations, as well...

nozzle reaction safety valve for sale

1/4" ASME safety valves are manufactured to ASME standards and certified by the national board of boiler and pressure vessel inspectors. Valves are interchangeable with all other ASME valves of same size and pressure. Valve resets after pressure drops 50%.

nozzle reaction safety valve for sale

The nozzle on the end of a fire hose is one of the most important pieces of equipment that a firefighter has at their disposal when combating a hostile fire. It"s the business end of what we do.

Understanding the nozzle involves more than knowing if a push or a pull opens the bale and if a left or right twist delivers a straight stream. Here are five nozzle questions whose answers you may not know or have forgotten. Either way, knowing your nozzle gives you an edge over your enemy in a fire attack.

Conventional fog nozzles have a fixed or selectable gpm setting. These settings correspond to a particular discharge orifice, or tip size. In order for a conventional nozzle with a fixed opening to operate at the correct nozzle pressure of 100 psi, the proper gpm flow must be supplied. For example, a selectable gallonage nozzle with settings of 30, 60, 95 and 125 gpm will only deliver those flows of 100 psi of nozzle pressure.

There are two possible results when the conventional nozzle is not supplied with the rated or selected flow. First, inadequate flow provides a weak, ineffective stream that fails to reach the seat of the fire. Second, too much water flow creates excessive nozzle pressure making the hose line more difficult to handle and potentially jeopardizing the safety of the nozzle crew.

With an automatic nozzle, the discharge orifice continually adjusts depending on the flow to the nozzle. This sets the flow being supplied to the proper nozzle pressure and correct velocity for maximum extinguishing capability.

The automatic nozzle uses a principle very similar to that of a pumper relief valve. A highly dependable spring, connected to the baffle that forms the discharge orifice, is balanced against the water pressure in the nozzle.

The pressure-control spring senses any increase or decrease in pressure within the nozzle. It then moves the baffle in or out to maintain a particular tip size necessary to keep the nozzle pressure at 100 psi. In effect, the nozzle is constantly changing tip size to match the water being supplied at that moment.

Automatic nozzles greatly simplify pump operation. Since automatic nozzles are designed to operate at 100 psi nozzle pressure, this becomes the minimum starting point for any operation.

The basic formula for calculating pump discharge pressure is PDP = NP + TPL — PDP is the pump discharge pressure, NP is the nozzle pressure and TPL is the total pressure loss (that"s hose line friction loss plus apparatus friction loss plus elevation pressure).

With an automatic, the nozzle pressure will remain constant and the formula can be rewritten as: PDP = 100 + TPL. So, for a 200-foot pre-connected 1 3/4-inch hose, what pump pressure will be required to flow 150 gpm? Friction loss in 1 3/4-inch hose for 150 gpm is about 28 psi per 100 feet of hose.

The advantage of using an automatic nozzle is that any flow can be delivered by the pump operator and still be controlled by the nozzle operator. Variable flow, constant nozzle pressure, and nozzleman flow control are three essential elements to successful fire streams and fire attack.

If the eductor manufacturer"s recommendations for inlet pressure, maximum hose length and size are followed, the automatic nozzle will adjust itself automatically to the rating of the eductor. With any eductor system, the nozzle valve must be fully open to prevent excessive back pressure on the eductor, which will prevent foam concentrate pickup.

Certain guidelines, however, must be followed. Foam-making is simply the addition of a proper amount of foam concentrate to water. This solution of foam concentrate and water is then mixed with air (aeration) either at the nozzle with aspirating attachments or as the stream pulls air along with it in a non-aspirating application.

Reducing nozzle pressure does account for some reduction in nozzle reaction. But how much reduction in pressure is required to get a significant reduction in reaction? And while reduced reaction may be a positive aspect, what are the negative aspects of choosing a low-pressure nozzle delivery system?

Those advocating for reducing the fog nozzle pressure typically would reduce the required nozzle pressure downward from 100 psi to 75 psi. If the flow is kept constant, the reaction reduction from a 25 percent cut in nozzle pressure is 13 percent. It works out this way: a 200 gpm stream at 100 psi has 101 pounds of reaction; cutting the nozzle pressure to 75 psi reduces the reaction to 88 pounds.

Nozzle pressure is directly related to the velocity of the stream. For the given example, instead of a stream speeding through the fire"s super-heated gases at 80 mph, it goes through at 60 mph. Which one goes farther? Which splashes more when it hits? Which bores through the wood char to get to deep-seated heat?