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5-inch (13 cm) flex suction hose with Storz fittings, mounted on an engine. Flexible suction hose (Flex suction or suction hose), not to be confused with hard suction hose in U.S., is a specific type of fire hose used in drafting operations, when a fire engine uses a vacuum to draw water from a portable water tank, pool, or other static water source.
Suction Hose. Suction hose is laid down on the suction side of pump (inlet) where the water passing through it is at a pressure either below or above that of the atmosphere. It is designed to resist internal and external pressure. It should have sufficient strength to withstand the pressure of external air when a vacuum has formed inside.
Hard suction hose A flexible rubber hose reinforced with a steel core to prevent collapse from atmospheric pressure when drafting; connected between the intake of a fire pump and a water supply and must be used when drafting. Also called hard hose, hard sleeve, or hard intake/suction hose. [5] Helmet
To reduce drafting friction and obtain a larger flow or higher lift, a larger cross-section of suction hose is employed. For example, using a five-inch (127 mm) hose, a pump that could lift 500 US gallons per minute (30 L/s) up 23 feet (7.0 m) would only be able to lift the same amount of water 12.5 feet (3.8 m) through a 3.5-inch (89 mm) hose.
Pacific Tek, [4] also founded in 1993, has created the Angled Vacuum Excavator Tank (1997) and the 180° Swivel Mount Valve Operator (1999). In 1998, the Mobile Tiefbau Saugsysteme produced another type of suction excavator. [5] The global market size for suction excavators was estimated to be valued at US$924.7 million in 2020. [6]
A hose is a flexible hollow tube or pipe designed to carry fluids from one location to another, often from a faucet or hydrant. [ 1 ] Early hoses were made of leather, although modern hoses are typically made of rubber, canvas, and helically wound wire.
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