Loss of pressure

Pressure absorption

Loss of pressure means the loss which is caused by the presence of the water meter in the conduit.

Loss of pressure through the meter is determined by EEC pattern approval tests, and must not exceed 0.25 bars at the nominal flowrate and one bar at the maximum flowrate.

pressure drop across (EDP) LFE matrix

pressure drop across the LFE matrix (EDP)

Loss of pressure means the loss which is caused by the presence of the meter in the pipeline.

The pressure absorption of a gas meter is the difference between the pressures measured at the inlet and outlet of the meter during the flow of a gas.

The decrease in blood pressure following subarachnoid blockade is caused by a decrease in both cardiac output and in peripheral resistance.

After application of equinatoxin l there was a fall in the arterial pressure. A prominent bradycardia was followed by the phase of the relative tahycardia.

This device shall be placed downstream of the meter if it causes a pressure loss.

- Replacement of the condensate pump suction pipe, increasing the size from 24 " to 30 " in order to reduce pressure drop at uprate flows,

Where the non-return device is installed between the gas eliminator and the meter, the resulting pressure loss must be low enough to be considered negligible.

It shall always be positioned as close as possible to the meter so that the pressure drop due to the flow of liquid between the two components is negligible.

The pressure in the exhaust pipe and the characteristics of the pressure drop in the sampling line shall be such that the probe collects a sample substantially equivalent to that which would be obtained by isokinetic sampling.

The pipework linking the device to prevent gas entering the meter, as specified in 1.6.3.3, and the meter itself, shall not incorporate any constriction or component likely to cause a pressure loss which generates gaseous formation by releasing the gas dissolved in the liquid. Such systems shall incorporate a manometer which indicates the pressure inside the tank.

As boundary conditions, the pressure at the inlet and outlet or the corresponding pressure drop was prescribed.

Subject to 1.6.6, when the pressure at the pump intake may, even momentarily, fall below atmospheric pressure or the saturated vapour pressure of the liquid, a gas separator shall be provided.

If this condition is unlikely to be fulfilled on all occasions, a device shall be fitted to stop the flow of the liquid automatically as soon as the inlet pressure falls below the atmospheric pressure.

However, in measuring systems with a manual air-vent immediately downstream of the point of transfer, a gas indicator shall be mandatory except in systems where the pressure may not fall below atmospheric pressure.

If the pressure of the liquid is likely to be less than atmospheric pressure while remaining greater than the saturated vapour pressure, the introduction of air into the meter shall be prevented by means of an appropriate device.

If there is no risk of the meter outlet-pressure falling below the atmospheric pressure (which is the case, in particular, with systems operating only on full-hose) automatic mechanisms to slow down and stop the flow shall not be required.

Where the meter outlet pressure in the measuring system may fall below the atmospheric pressure but remain higher than the saturated vapour pressure of the liquid measured, these devices shall be combined with an automatic mechanism to slow down and stop the flow, in order to prevent any air passing into the meter.

(b) by determining the pressure drops across the particular trapping system used as a function of flow rate in a separate experiment (this may be not very satisfactory for liquid traps).

In order to minimize the effects on the conditions at the exhaust tailpipe and to limit the drop in pressure inside the dilution-air conditioning device, if any, the pressure inside the mixing chamber must not differ by more than ± 0,25 kPa from atmospheric pressure.

In order to minimize the effects on the conditions at the exhaust tailpipe and to limit the drop in pressure inside the dilution-air conditioning device, if any, the pressure inside the mixing chamber must not differ by more than ± 0,25 kPa from atmospheric pressure.

The leak-tightness of the facepiece and the pressure drop on inspiration and, in the case of the filtering devices, purification capacity must be such as to keep contaminant penetration from a polluted atmosphere low enough not to be prejudicial to the health or hygiene of the user.

when the supply line is evacuated at the rate of at least 1 bar/s, the automatic braking of the trailer must start to operate before the pressure in the supply line falls to 2 bar.'

'In any case during re-charging of the braking system from zero pressure, the spring brakes must not release until the pressure in the service braking system is sufficient to ensure at least the prescribed secondary braking performance of the laden vehicle, using the service brake control.'

Reservoirs fitted to trailers must be such that after eight full stroke actuations of the drawing vehicle's service braking device, the pressure supplied to the operating parts using it does not fall below a level equivalent to one-half the figure obtained at the first brake application and without actuating either the automatic or the parking braking device of the trailer.

Total pressure absorption

Mechanical pressure absorption

The mechanical pressure absorption, that is to say the absorption of pressure with a flow of air of density 1.2 kg/m3 at a flow between Qmin and 2 Qmin must not exceed:

The above values relate to the maximum of the mechanical pressure absorption.

blood pressure dropping

the mechanical pressure drop must not have increased by more than 20 N/m2 (0,2 millibars)."

the mechanical pressure absorption must not have increased by more than 20 N/m2 (0.2 mbar);

The total pressure absorption with a flow of air of density 1.2 kg/m3 at a flow rate equal to Qmax must not exceed on average:

by determining the pressure drops across the particular trapping system used as a function of flow rate in a separate experiment (this may be not very satisfactory for liquid traps).

For meters for which the operating pressure exceeds 0.1 MN/m2 (1 bar) the provisions of item 6.2 of this Chapter regarding the mechanical pressure absorption apply, but the total pressure absorption mentioned in item 6.1 of this Chapter of these meters is not taken into consideration.

FOR METERS FOR WHICH THE OPERATING PRESSURE EXCEEDS 0.1 MPA (1 BAR) THE PROVISIONS OF SECTION II.6.2 REGARDING MECHANICAL PRESSURE ABSORPTION SHALL APPLY , BUT THE TOTAL PRESSURE ABSORPTION OF THESE METERS AS REFERRED TO IN SECTION II.6.1 SHALL NOT BE TAKEN INTO CONSIDERATION.

blood pressure dropping heart beating fast sweating.

Outside sources of energy, if any (characteristics, capacity of energy reservoirs, maximum and minimum pressure, pressure gauge and device showing excessive drop of pressure on the dashboard, vacuum reservoirs and supply valve, supply compressors, compliance with provisions regarding pressure equipment)

ACE inhibitors may cause a fall in blood pressure.

A single 5mg dose of anagrelide can lead to a fall in blood pressure usually accompanied by dizziness.

Xagrid, at higher than recommended doses, has been shown to produce reductions in blood pressure with occasional instances of hypotension.

Overdosage can cause a drop in blood pressure, palpitations, slow pulse, changes in blood composition, and dehydration.

It may cause a rash over the whole body, shortness of breath, wheezing, reduction in blood pressure, fast pulse, or sweating.

Signs of such reactions include hives, rash, tightness of the chest, wheezing, drop in blood pressure and breathing difficulties.

− If you are taking medicines called nitrates, as the combination may cause a potentially dangerous decrease in your blood pressure.