How to detect leaks in a separating funnel and how to perform a leak detection on a dispensing funne

1. Close the separating funnel.

Neck and inject the appropriate amount of distilled water into the separating funnel.

Observe the ends of the and the lower mouth of the funnel for water leaks.

Principle: Close the water stop clip, open the piston of the separating funnel, add water to the separating funnel, if the water surface in the separating funnel can not continue to fall, it proves that the device has good air tightness and does not leak.

2. If there is no water leakage, close the upper grinding mouth plug, hold the with your left hand, press the upper grinding mouth plug with the index finger of your right hand, stand upside down, and check whether there is water leakage; If there is no water leakage, upright, rotate the upper grinding plug 180 degrees, stand upside down, check whether there is water leakage, if there is no water leakage, then this separating funnel can be used.

Principle: The internal gas does not leak, and the air pressure is higher than the external atmospheric pressure after water compression.

with outside atmospheric pressure and water inside the funnel.

Pressure balance, holding out the water in the funnel does not fall.

1.Close the dispensing funnel, open the piston, and close the piston by filling the separating funnel with an appropriate amount of distilled water.

2.Observe whether the stopcock and funnel outlet are leaking, then hold the stopcock with one hand and the bottle stopper with the other hand, turn the separating funnel upside down to see if there is water leaking at the piston.

3.Then straighten the separating funnel, rotate the piston 180 degrees, and stand upside down again to see if the piston is leaking.

If none of the water leaks, the separating funnel can be used.

Close the water stop clip, open the piston of the separating funnel, add water to the separating funnel, if the water surface in the separating funnel can not continue to fall, it proves that the device has good air tightness and does not leak.

The principle is: the internal gas does not leak, and the air pressure is higher than the external atmospheric pressure after water compression, which is balanced with the external atmospheric pressure and the water pressure in the funnel, and the water in the funnel does not fall. Close the piston of the separating funnel, add an appropriate amount of water, turn the funnel upside down to observe whether there is water leakage, if it does not leak, rotate the piston 180 degrees and then invert it to observe, if it still does not leak, then the piston.

Almost all pistons are leak tested.

Inspection method: close the piston of the separating funnel, add an appropriate amount of water to it, invert the funnel to observe whether there is water leakage, if it does not leak, rotate the piston 90 degrees and then invert to observe, if it is still not leaking, the sealing performance of the piston is qualified.

Close the piston of the separating funnel, add an appropriate amount of water to it, invert the funnel to observe whether there is water leakage, if it does not leak, rotate the piston 180 degrees and then invert it to observe, if it still does not leak, the sealing performance of the piston is qualified.

Add some water, let it stand after **, see if the water leaks, turn the plug 180 degrees, and check it at least twice.

Fill in an appropriate amount of distilled water, stand upright, if there is no leakage, rotate the cork 180 degrees, stand upside down, if it does not leak, it is good.

The specific operation of the leak detection of the separating funnel is: close the piston of the separating funnel, add an appropriate amount of water to it, invert the funnel to observe whether there is water leakage, if it does not leak, rotate the piston 180 degrees and then invert to observe, if it is still not leaking, the sealing performance of the piston is qualified.

Close the lower piston, add a small amount of water, and let it stand, no water leakage, indicating that there is no water leakage at the lower piston. Plug the glass stopper, resulting in no water exposed around the glass stopper, and put the glass away. First, clamp the rubber tube on the catheter, add water to the separating funnel until the liquid level is higher than the lower end of the funnel, if there is a difference between the liquid level inside and outside the funnel, (or the liquid level in the funnel does not drop), it is non-leaking.

Before use, it must be tested for leaks, and the method of leak detection is to connect the device and block the vent except for the separating funnel, of course, check its air tightness first.

This is the operation requirement specification Oh close the neck of the separating funnel, inject an appropriate amount of distilled water into the separating funnel, observe whether the two ends of the and the lower mouth of the funnel are leaking, if there is no water leakage, close the upper grinding plug.

The method of leak detection of the separating funnel: close the of the neck of the separating funnel, inject an appropriate amount of distilled water into the separating funnel, observe whether the two ends of the and the lower mouth of the funnel are leaking, if there is no water leakage, close the upper grinding mouth plug, hold the with the left hand, press the upper grinding mouth plug with the index finger of the right hand, stand upside down, check whether there is water leakage, if there is no leakage, upright, rotate the upper grinding mouth plug 180 degrees, upside-down, if there is no water leakage, then this liquid separation funnel can be used.

Separate funnelsIt is a kind of glass experimental instrument, especially involving a separating funnel for chemical experiments. Including the bucket body, the bucket lid that covers the upper mouth of the bucket body. The lower mouth of the bucket body is provided with a piston of a three-way structure, and the two crosses of the piston are connected with two downpipes respectively.

When the amount of liquid that needs to be separated is large, the two liquids in the bucket body can flow to the lower tube at the same time by moving the tee of the piston, and it can be completed at one time without changing the container.

Separating funnel classification:

The separating funnel is divided into spherical shapes; Spherical separating funnel, pear type and cylindrical type and other styles, the neck of the spherical separating funnel is longer, which is mostly used for the instrument of dropping liquid in the gas making device, and the neck of the pear-shaped separating funnel is relatively short, and it is commonly used as an instrument for extraction operation by Xinhui.

Purpose of separating funnel:

1.Solid-liquid or liquid-to-liquid reaction generator: control the amount of liquid added and the size of the reaction rate.

2.Substance separation and purification: separating the two immiscible liquids formed after extraction.

Connect the device and block the vent hole other than the separating funnel, then close the separating funnel, inject a certain amount of water into the separating funnel, and then open the separating funnel, if the liquid level of the separating funnel drops, that is, the device (device group), the air tightness is poor, otherwise, it is good.

Close the, add water, and there are no droplets oozing out for a while. Cover the plug, turn the separating funnel upside down, no liquid seepage, and then rotate the plug 180 degrees, there is still no liquid oozing, then the separating funnel has good sealing.