Clean workshop air conditioning water system
Clean pharmaceutical cleanroom air conditioning water system
When there is a sewer pipe or a trench near the fan coil unit, consider using a condensate pipe to discharge the condensed water connected to the water pan of the fan coil unit to the adjacent sewer pipe or trench; Multiple fan coil units are far away from the sewer pipes or trenches, and condensate water pipes are required to separate each typhoon...
Text label: clean plant design, clean plant engineering, air conditioning water system
Clean Factory Air Conditioning Water System
When there is a sewer pipe or a trench near the fan coil unit, consider using a condensate pipe to discharge the condensed water connected to the water pan of the fan coil unit to the adjacent sewer pipe or trench; Multiple fan coil units are far away from the sewer pipe or trench, and the condensate water branch pipe of each fan coil unit should be connected to the sewer pipe or trench with a condensate water main pipe. The minimum slope of the pipe is 0.008; all condensate water pipes should be insulated, When the temperature of the condensate water pipe is lower than the dew point temperature of the air, the surface of the condensed water pipe will condense and drip water. The insulation material can be selected by yourself. When using glass wool with grid line aluminum foil veneer for insulation, the thickness of the insulation layer can be 20mm. , the thickness of the insulation layer can be 15mm.
The air-conditioning water system usually uses hot-dip galvanized steel pipe and seamless steel pipe, but for medium and small projects, PPR pipe and copper pipe are also used; the most commonly used valve in the air-conditioning waterway is the regulating valve. There are three general regulating valves. Copper gate valve, copper ball valve, butterfly valve, and copper ball valve are mostly used in occasions where shut-off is the main purpose and adjustment is the secondary purpose; the valve must be tested for strength and tightness before use, and the strength test pressure is the nominal 1.25 times the pressure, closed test for 5 minutes, observe that the valve body has no deformation and leakage, and the pressure does not drop to be qualified; close the valve, do a tightness test with the nominal pressure, and require no leakage for 5 minutes to check the tightness of the valve closure. The exhaust device generally adopts an automatic exhaust valve with a shut-off valve on it to facilitate maintenance and manual rapid exhaust. The exhaust valve should be installed in the downstream and high point of the water flow direction, so that the exhaust effect will be better; A shut-off valve should be installed in the water outlet pipe, and a waterproof drain valve should be installed between the shut-off valve and the inlet and outlet of the unit. , exhaust, and drive the air out of the system; after the system is emptied of water, first close the water inlet valve when refilling water, so that the air there is discharged; after refilling water, slowly open the unit outlet valve when starting the unit for the first time to prevent the flow rate from being too fast. The air stored in the pipeline returns to the pump inlet of the unit at one time, resulting in air suction. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean workshops and purification projects.
In order to prevent the blockage of the water pipe system and ensure the normal function of various equipment and valves, a water filter should be installed in the pipeline to remove and filter the sundries and scale in the water. Generally, the water filter is installed in the water pump. On the suction pipe section and the water inlet pipe of the terminal equipment, before and after the water filter, a gate valve should be set for it to be cut off from the water system during regular maintenance. Air conditioning cold and hot water pipes and condensing water pipes need to be insulated. It is most convenient to use insulation sleeves for insulation. The insulation materials can be selected by yourself. Rubber and plastic insulation materials are used. The thickness of the insulation layer can be 20-25mm. When the glass wool on the surface is used for thermal insulation, the thickness of the thermal insulation layer can be 25-40mm. In order to better isolate the radiant heat, anti-corrosion and waterproof penetration, it is necessary to wrap the air-conditioning thermal insulation tape on the outer layer of the thermal insulation tube shell. The differential pressure control is that the differential pressure control valve is installed between the chilled water tank and the water collector. When the pressure difference between the supply and return water main pipes exceeds the set value, part of the chilled water is bypassed, and the pressure difference between the supply and return water is stabilized at the set value. Generally, the set value of the differential pressure control device of the central air-conditioning system is 0.15-0.2MPa.
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