MR-HL 113 Installation technology: losses in valves and fittings Vocational Training Equipment Heat Transfer Laboratory Equipment
Description • trainer for heating and sanitary engineering • pressure losses in standard valves and fittings Pressure losses occur in pipe systems as a result of friction and turbulence. In practice, the use of shut-off valves and fittings causes pressure losses that need to be taken into consideration when designing pipe networks. The MR-HL 113 unit can be used to investigate the pressure losses of different shutoff valves and fittings. The pipe elements used are commercially standard components in heating and sanitary engineering. The clear panel is mounted on a sturdy, movable frame. The trainer consists of five pipe sections, in each of which different shut-off valves and fittings are fitted. The pipe sections can be individually selected via ball valves. One of the pipe sections is transparent with a transparent ball valve in order to visualise the flow conditions upstream and downstream of a shut-off valve. The flow is adjusted using valves in the inlet and outlet and read on a rotameter. The pressure measuring points in the pipe system are designed as annular chambers and are located directly upstream and downstream of the valves and fittings, ensuring a precise pressure measurement. The sensors are connected in pairs to a differential pressure meter and the respective differential pressure read on the display. Learning objectives/experiments • pressure losses in valves and fittings • measuring the pressure difference • effect of the valve orifice shape on the pressure loss • effect of the flow velocity • determination of resistance coefficients • comparison between experiment and calculation Specification [1] investigation of the pressure losses at various shutoff valves and fittings [2] pipe elements are commercially standard components in heating and sanitary engineering [3] clear panel mounted on a sturdy, movable frame [4] pipe sections can be individually selected via ball valves [5] water connections with quick-release couplings [6] flow can be adjusted via valves [7] flow measurement using rotameter [8] differential pressure measurement via differential pressure meter with display Technical data Ball valve, plastic, transparent, Ø: DN32 Ball valve, steel, Ø: DN15 Angle seat valve, Ø: DN15 Screw-down valve, Ø: DN15 Gate valve, Ø: DN15 Differential pressure meter Measuring ranges • flow rate: 200…1700L/h • pressure: ±200mbar LxWxH: 1650x700x1850mm Weight: approx. 90kg Required for operation water connection, drain Scope of delivery 1 trainer 1 differential pressure meter 1 set of connecting hoses 1 set of instructional material
