Air valves

An air valve, sometimes called the air-activated valve, is widely used for automated food handling operations. Although electronic or electric control boxes may be a part of the system, the valve itself generally is air-activated, and is more reflable than other types. Air-operated valves are used for in-place cleaning systems, and for the transfer and flow control of various products. 

Spinning pack Chimney air chamber Filaments Chimney door Convergence guide Insert tube Threading air valve... 

One day the temperature-measuring device gave a false indication of high temperature. The air valve closed, and the drain valve opened. The temperature indication fell, perhaps because the reactor was now empty. The drain valve stayed open, but the air valve reopened, and a flammable mixture was formed in the reactor. Fortunately it did not ignite. 

The air valve reopened because the solenoid valve in the instrument air line leading to the air valve would not stay in the tripped position. It should have been fitted with a latch. 

Figure 14-4. When the air valve reopened after a dump, a flammable mixture formed in the reactor.

Luft-ventil, n. air valve, -verdichter, m. air condenser or compressor, -verdichtung,/. air condensation or compression. 

Automatic Air Storting Valves ond Quick Opening Main Air Valve... 

Figure4.10 Standard pipe installations for a double air valve. Note Unless otherwise directed, pre-cast concrete units shall be bedded on well-compacted granular material Type A brought up from the base of the trench.

Pressure aerators employ a vertical, volcanic lava media-filled PV and receive water at pump pressure. The water is mixed with blown air and fed to the bottom of the bed. Excess air is discharged through an air valve to atmosphere, and the aerated water is collected at the top of the column and then fed to a sand filter for removal of insoluble ferric hydroxide. 

With an airproof lid on top of the borehole and an air valve it would be possible to pump air into the casing. This way the groundwater level will be lowered, to preferably a bit above the lower edge on the casing as shown in Figure 61. 

Clean Air Valve developed by Ted Switen, USA. Tests on carburetor engines in Ukraine showed 2- to 4-fold reductions in the exhaust levels and fuel economy improvement by 1 %. At its prospective price of about 50, the device will pay back after a 15,000 to 20,000 km run. A modification intended for diesel engines will be run in in 1998. 

Unfiltered Brine, f Filtered Brine, Sludge, ( ) Plant Air, Valve Open, Valve Closed... 

After the test tube has incubated for 10 minutes, close the valve attached to the stopper. Make sure the valve near the pressure sensor is open to the sensor. Start measuring the gas pressure by pressing ENTER. Monitor the pressure reading on the CBL unit. If the pressure exceeds 1.3 atm, the stopper can pop off. Open the air valve on the pressure sensor to release this excess gas pressure. 

After 10 minutes, the data collection will stop. Open the air valve on the stopper. If needed, you can run a second trial by closing the air valve and choosing 2 WES to REPEAT If you are finished, press l NO. 

Each cell is provided with an individually controlled air valve. Air pressure is between 108 and 124 kN/m2 (7 and 23 kN/m2 gauge) depending on the depth and size of the machine and the pulp density. Typical energy requirements for this machine range from 3.1 kW/m3 of cell volume for a 2.8 m3 unit to 1.2 kW/m3 for a 42 m3 unit. 

Fig.8.1. Schematic representation of iuminescent sorter 1-funnei 2-vibrational feeder 3-frame 4-conveyer for concentrate 5-conveyer for waste 6-luminescence excitation source 7-collecting optics 8-optical filter 9-detector 10-air valve (Moskrousov and Lileev 1979)... 

The vast majority of propane fuel systems used on light-duty vehicles to date have been of the mechanical-control type that meter propane in proportion to the amount of air used by the engine (air-valve and venturi-type mixers ). While these systems work well, their capabilities have been overshadowed by gasoline fuel injection systems and often lag behind gasoline systems in terms of acceleration, driveability, and cold-start performance. Chrysler Canada and one European equipment manufacturer offer liquid propane injection systems that are direct analogs to gasoline port fuel injection systems. These systems should have inherent performance advantages compared to the vaporized propane fuel systems. 

There must be a master control valve or switch accessible to and within 15 feet of the instructor s station for emergency cut-off of all gas cocks, compressed air valves, water, or electrical services accessible to students. Valves must completely shut-off with a one-quarter turn. This master control is in addition to the regular main gas supply cut-off, and the main supply cut-off must be shut down upon activation of the fire alarm system. 

Operations followed the instructions in the log book and started adding hot water to the vessel. It took about 11 hours to increase the tank level by 11 ft. (3.4 m) with hot water. The operator completed adding the prescribed amount of water early in the morning or about 5 45 A.M. About 15 minutes later, the operator opened up compressed air valve to the lance to roll or mix the contents within the tank as the Log Book instructions directed. The caustic soda was about 250° F (121° C) (well above the boiling point of water) and mixing of water and strong caustic soda solutions is strongly exothermic. 

Figure 7.3 Tape-wrapped air valve. (Reprinted with permission of Dave Raymond, City of Ottawa, Public Works and Services)...

In the Agitair flotation machine (Fig. 19-76), the impeller is a flat rubber-covered disk with steel fingers extending downward from the periphery. A rubber-covered stabilizer eliminates dead spots in the agitation zone and improves bubble-ore contact. The degree of aeration is controlled by regulating air volume on each cell with an individual air valve. Air is supplied at 10 x 10 Pa (1.5 Ibf/in ). 

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