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In the United States, NFPA 1901 requires engines to have suction hose that matches the engine's pump rating. [12] For example, an engine with a 1,000-US-gallon (3,800 L) per minute pump is required to carry 5-inch (13 cm) or larger hose, [1]: 181 while a wildland fire engine will typically carry 2-to-2.5-inch (5.1 to 6.4 cm) hard suction hose.
This class of pump is often called a "hose pump". The biggest advantage with the hose pumps over the roller pumps is the high operating pressure of up to 16 bar. With rollers, max pressure can arrive up to 12 bar (170 psi) without any problem. If the high operating pressure is not required, a tubing pump is a better option than a hose pump if ...
If an NPSH A is say 10 bar then the pump you are using will deliver exactly 10 bar more over the entire operational curve of a pump than its listed operational curve. Example: A pump with a max. pressure head of 8 bar (80 metres) will actually run at 18 bar if the NPSH A is 10 bar. i.e.: 8 bar (pump curve) plus 10 bar NPSH A = 18 bar.
Adapter used to attach a smaller diameter source hose to a larger diameter receiving hose. Indian pump (aka Indian tank) A brand of five-gallon water can, or back-pack bladder, featuring a short hose and hand pump for use in wildland firefighting. Intake Part of pump where water enters when pump forms partial vacuum. In-line eductor
Hydraulic hose is graded by pressure, temperature, and fluid compatibility. Hoses are used when pipes or tubes can not be used, usually to provide flexibility for machine operation or maintenance. The hose is built up with rubber and steel layers. A rubber interior is surrounded by multiple layers of woven wire and rubber.
Pump curves are quite useful in the pump selection, testing, operation and maintenance. Pump performance curve is a graph of differential head against the operating flow rate. They specify performance and efficiency characteristics. Performance tests are done on the pumps to verify the claims made by the pump maker.