the effective area of characterization of bellows valve converts pressure to a concentrated force ability, in the case of using pressure into a concentrated force output, effective area is an important parameter. When used in the force balance instrument, it has

work area stability will directly affect the precision of the instrument. On this occasion not only requires the reasonable effective area, but also requires effective area does not change according to the working conditions in the process of work.

1, the effective area is an equivalent area, pressure axial force in this area will be equal. In general, with the increase of internal pressure, the effective area smaller bellows valve, surface with external pressure

the increase of effective area. 2, corrugated tube Industrial Valves under the action of external force or pressure differential, the volume variation and the corresponding effective length variation ratio of effective area called volume. 3, the effective area of the demands of corrugated tube valve and its calculation method depends on the purpose of the Industrial Valves. If used as elastic seal or pipeline thermal compensation, the meaning of the effective area is only used to calculate the forming of

axial force and thrust in the system is used. The effective area of corrugated tube Industrial Valves worry there are some differences between calculated values and measured values. In general with special formula to calculate effective area, is can meet the need. When used in the force balance instrument and need to transfer pressure

in can field, should be accurate to determine the effective area, requires a measurement one by one.

use din bellows gate valve of the note 1, din bellows gate valve opening and closing can directly with the hand operation, F wrench can be used for opening and closing. 2, the valve stem, opening and closing in place, can no longer be forced power works, otherwise easy to cause the internal thread rupture, causing damage to the valve. 3, din bellows gate valve opening and closing of the need to observe the sealing surface of the gate at the same time, especially the packing gland, in order to avoid leakage

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