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Pump Volvo

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Pump Volvo
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What is an intumescent coating?

An intumescent coating is a passive fire protection specialist paint that chemically reacts when heated in a fire. The coating expands in size to form a char, which protects the steelwork for a specified period of time from the heat of the fire.

Why do you need an intumescent coating?

The purpose of passive fire protection and protecting structural steel is to give the building occupants time to leave the building. Steel is a very strong and versatile building material, but at temperatures of 550ºC it begins to loose its structural integrity.

Intumescent for steel protection is commonly thick and opaque and finished with a thin protective fire retardant coat, similar to a gloss. Intumescent coatings are normally applied by airless spray to provide a smooth decorative finish, which remains stable at ambient temperatures.. These coating compositions are based on organic resin binders, which are typically acrylated rubber or epoxy.

When dry, a passive fire protection intumescent coating is a reactive layer, so it is very important to achieve the correct thickness of dry film to obtain the required fire resistance. The film thickness is measured wet with a wet-film gauge, as a certain wet film thickness will dry to a specific dry film. Several coats may need to be applied to build up to a total dry coat thickness to give the required heat protection.

The resins are filled with active ingredients, that will react in a fire at temperatures around 250°C to form a thermally insulating carbonaceous char or foam. The char can swell up to 50 times the original coating thickness.

As described above the basic formulation of an passive fire protection intumescent comprises of an organic binder, a carbonific, usually a penta or dipentaerythritol, a spumific or blowing agent which could be melamine or a melamine formaldehyde derivative, a source of an acid catalyst such as ammonium polyphosphate and additionally a char reinforcing pigment.

As the temperature rises the binder begins to melt and the blowing agent liberates gases causing a controlled expansion. At the same time there is degradation of the carbon backbone and fusion of the inorganic reinforcing materials, resulting in char solidification.

In this age of steel and glass commercial buildings, exposed steelwork is sometimes an integral design feature. Intumescent coatings allow steel to be used as an design feature (where fire protection boards would not) while also conforming to building regulations.

Intumescent passive fire protection coatings provide steel structures with corrosion protection, fire protection and a visualdecorative element if required.

Until the last 10years, the typical airless unit for applying intumescent coatings was a pneumatic pump having an air motor and capable of providing up to 4 - 5,000 psi at the pump. Such a unit requires a road compressor of about 150 cfm and is a heavy unit.

Improvements in passive fire protection intumescent formulation have reduced the weight of coatings and the need for high pressure application. Today, almost all intumescent coatings can be applied with a more compact self contained unit with either a petrol engine or an electric motor.

In the UK, petrol engine units are more widely used over electric because electric power is often not available on site at the early stage of construction when the intumescent is applied.

Special conditions..

Hydrocarbon fires tend to show a very rapid rate of heating combined with extreme turbulence and result from the burning of hydrocarbon based fuels such as oil and gas. Therefore a special passive fire protection paint is required. Specialist intumescent coatings have been developed to cope with the aggressive nature of hydrocarbon fires, where resistance to blast overpressure and jet fire is a strong probability.

Oil and gas projects exist in some of the most aggressive environmental conditions and require not just fire protection but also exceptionally durable coatings. Epoxy intumescents are able to provide not only the fire protection requirements, but also blast resistance and extreme durability to the worst weather conditions.

If you have any question regarding passive fire protection or for more information on passive fire protection please visit http://www.alltask.co.uk/index.php?pagecode=p105

Volvo Water Pump -- the Heart of Volvo’s Cooling System

A Volvo vehicle's cooling system could not function properly without a Volvo water pump that acts as the heart of the cooling system, pumping, and circulating the coolant throughout the cooling system, from the radiator to the engine and then back. A typical Volvo water pump takes its power from the engine. Some water pumps operate through a belt and pulley. Others use a gear or chain. This power is transferred to a shaft, which contains an impeller that spins and circulates coolant in as much as the same way as a propeller works on a boat or an airplane to move water or air. Both the shaft and impeller spin on a sealed bearing.

Water pumps wear out from time to time, and may even get damaged. When the gasket or seal behind the Volvo water pump begins to leak or when the bearing for the pulley gives way, one can already say that the water pump is already broken. Other symptoms of a faulty Volvo water pump are coolant leak coming from the water pump or from the surrounding area, loose pulley bearing, excessive belt tension, wearing out, and seal failure. A growling noise is also an indication of a bearing failure. If this happens, more serious problems may occur like the breaking of the timing belt, thus, causing the engine valves to crash into the pistons.

Today, some water pumps are relatively easy to access and can be serviced with basic hand tools and mechanical know-how. Other water pumps are located deep inside an engine. Professional help is therefore, required. Water pumps that get their power from the timing belt or chain are often located inside the engine and best replaced when servicing either component, and vice versa. It is recommended to have the Volvo water pump checked by a professional to prevent more serious damages.

About the Author

Evander Klum is a Business Administration graduate who hails from Alabama. He enjoys extreme sports and he is also a car racing fanatic. At present, he works as a marketing manager at an advertising agency in Cleveland.

Replacing Volvo Rear Fuel Pump?

how much would it cost for me to replace the rear fuel pump in a 1987 volvo 740gle

7 series main pump can be had for 188 dollars, non turbo.. turbo cars 267 dollars, the in tank pre- pump costs 80.10 these prices are from a recent but not current ipd catalog and are for genuine bosch parts i recommend a new main fuel filter and new filter sock for the pre- pump i have tried other cheaper brands and they do not last. the bosch parts are pricey but they fit and last. go to ipd usa for current pricing

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