U401-B Solenoid Valve

U401-B Solenoid Valve

Materials:

Body: Brass

Approval: EX mâ…¡A T4

Technical Specifications:

Power:AC220 V,2×4W

Diamter:1"

Current :big flow valve 18mA

small flow valve 18mA

Allowed flow rate:90L/min , Max flow rate: 90L/min , Mini flow rate:5L/min.

Working pressure:0.035-0.035MPa

Environmental Condition: -40~~+70degree

Package:

Product ID Weight Dimension

U401-B 2.1kg/case of 130 ×116× 80mm/case of 1

wing measuring requirements: Instrument of measurement should have a certain tension and not easily be deformed so as to affect the inner cubage volume. Foam and vapor that dissolved in fuel measured are able to be discharged completely when pouring into instrument of measurement. Liquid measured should be discharged after measurement, only a bit being left in container. Valve of instrument of measurement should have reliable sealability without leakage phenomenon as being full of oil. Indicating pipe on measurer should be made of glass without defect on inner diameter so as to hinder observation. Connection between measuring neck and scale should be fixed in order to keep stably relative position. The line on indicating glass should be legible and clear, width being no more than 0.25mm. The inner of measuring neck is depended upon measurer’s accuracy. As for Class II metal standard measurer, the ratio of corresponding liquid volume of per millimeter to measurable volume of measurer is no more than 5×10�. Discharge time of measurer relies on the diameter of bottom valve. It is leaned from experiment that the longer time of unload the less residual liquid left, better promoting measurement accuracy, and vice versa. Thereby, in order to control the tolerance occurred by discharge velocity and time and residual volume during approval progress, discharge condition and pouring-out time is regulated generally that opening fully bottom valve start to count two minutes from liquid dropping, then close bottom valve; or fully open bottom valve and close it after 3 minutes. Indicated value generally read out as sh fuel dispenser owed at the bottom of curve in indicating glass. Apart from standard measurer applied in fuel dispenser inspection and approval, there is thermometer or temperature sensor, measured range �0�to �0� minimum value 0.2� which used to measure temperatures of liquid that passed over nozzle vent and in standard measurer. One of purpose to measure temperature is to mak fuel dispenser e modification of fuel dispenser

and responsible supervision of the emission　　tion of the image quality of digital X-ray　　 of time signals and standard frequency with　　detectors which has been successfully com-　　 the DCF long wavelength radio transmitter　　pleted.　　 (see Figure 4).　　 87　　Optics　　With the primary caesium atomic beam which also cover a project to reach the funda-　　clocks and the fountain clock CSF1 which mental quantum limit the quantum projec-　　practically runs in continuous operation the tion noise with an atomic ensemble. This is　　PTB will be well prepared for the near future important in particular for future atomic　　for the realization of the time scales. In con- clocks for which the PTB at present follows　　trast to the caesium clocks based on micro- two different strategies. In addition to the　　wave oscillators future atomic clocks which single stored ion atomic clouds with approxi-　　are proposed to meet the increased require- mately one million ultracold atoms promise　　ments of science and technology will work especially with respect to stability a signal-to-　　with optical oscillators. Last year the PTB noise ratio upon interrogation larger by　　made a breakthrough in the field. Radiation several orders of magnitude and thus a　　of a wavelength of 435 nm from a mo fuel dispenser st stable higher short-time stability of the optical　　laser system was stabilized in two branches clocks. The higher stability will then again　　in its respective frequency to the same transi- allow smallest systematic frequency shifts to　　tion of two independent stored Yb+ ions. be investigated which limit the accuracy　　With fuel dispenser fuel dispenser

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