Fire pump suction pipe requirements

Two or more sets of fire pump, fire pump in order to ensure uninterrupted water supply should be provided with two suction pipes, and meet the following requirements: (A) two or more than two suction pipe, when one of the suction pipe In maintenance or damage, the remaining suction pipe should still be able to pass 100% of the total amount of water, that is, the production, living and fire water pump room at the same time, the maximum water consumption, should still be able to ensure 100% Fire water; independent set fire pump room, when one of the suction pipe damaged, the remaining suction pipe should still be able to guarantee 100% of the fire water. (B) high-pressure fire pumps, temporary high-pressure fire pumps, fire pumps each should have an independent suction pipe to ensure that water from the fire pool or municipal water pipe directly to the water supply fire. (C) should be used since the tank-type water. This way of absorbing water, because the fire pump is often full of water, fire pumps can be quickly activated to ensure that the fire water fire, if there is any difficulty, there should be reliable water-filled equipment. (D) In ​​order to ensure a reliable source of annular pipe, the fire pump should have not less than two outlet pipe directly connected with the ring pipe, when using two outlet pipe, each outlet pipe should be able to meet the supply of all Water consumption. That is, when one of the outlet pipes is under inspection, the remaining pipes should still supply the full amount of water. Pumphouse outlet pipe and ring pipe network should be connected in different pipe sections, in order to ensure water supply safety. Fire pumps should be regular or regular operation, lubricating parts, and start the fire pump, the pressure and flow measured, therefore, in the fire pump outlet pipe to be set up inspection and testing of the drain valve. Test the water used, can be returned to the pool, to facilitate investment and facilitate testing.

Hot Pipette Tips

The commonly used Pipette kits are mainly composed of a pipette and a pipette tip. The pipette tip is a single empty
Cavity reservoir; the pipette uses the principle of air displacement and controls the maximum displacement of the piston by rotating a screw with an ultra-fine thread
displacement, and then control the amount of liquid suction. There are the following problems when using the above kit for suction: 1. The suction volume is controlled by the pipette
After the pipette is sterilized or used for a period of time, it is easy to cause "hidden" failures, which cause the operator to be difficult to detect.
The actual suction volume is inaccurate, and it needs to be adjusted frequently, and the operation is cumbersome and time-consuming; 2. To improve the pipetting accuracy, the operator's
The operation requirements are high, and it is easily affected by factors such as the suction speed, the depth of the tip below the liquid level, and the inclination angle of the pipette.
The actual suction volume will be heard; 3. The actual suction volume will be affected because the suction head cover is not tight and leaking, and it will not be easily detected; 4.
When performing experiments that require high accuracy, such as analysis, in the operation of equal volume aspiration of liquids with different densities, the actual
The actual suction volume will be affected by the density itself; 5. In order to improve the accuracy, this type of pipette needs to carry out high
Cost-optimized design results in extremely high pipette costs.

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