Pressure plate

The fluid plasticizer (solvent) consists of an energetic compound, eg, nitroglycerin, an inert carrier, and a stabilizer. The system is evacuated to remove volatiles, moisture, and air, and the plasticizer is then pressurized and passed slowly upward through the powder bed while the powder is held stationary by a pressure plate on the powder column. Casting solvent may also be added from the top of the mold. 

For jointing large bus sections it may be advisable to use pressure plates to avoid excessive local pressure. 

MTC recommends a nozzle design similar to that shown in Figure 5-8, separating the pressure plate adjusting ring functions. This provides the following advantages ... 

CIlIss HBl In a Class IlBl cabinet, supply blowers draw room air (plus a portion of the cabinet s recirculated air) through the from grill and then through the supply HEPA filters located immediately below the work surface (Fig. 10,96). This particulate-free air flows upward through a plenum ai each side of the cabinet and then downward to the work area through a back-pressure plate. In some cabinets an additional supply HEPA filter removes particulate generated by the b [Pg.987]

Wlien the driver disengages the clutch by pushing down on the clutch pedal, a lever system (not shown) moves the pressure plate to the right against compres-... 

Flywheel Clutch Plate Pressure Plate Spring Clutch Cover... 

Pressure Plate Extraction at 10 kPa Moisture, California USA (Eaton et al., 1960) ... 

Figure 2.105 Optically transparent thin layer electrochemical (OTTLE) cell. A = PTFE cell body, B = 13 x 2 mm window, (C and E) = PTFE spacers, D = gold minigrid electrode, F = 25 mm window, G = pressure plate, H = gold working electrode contact, 1 = reference electrode compartment, J = silver wire, K = auxiliary electrode and L = solution presaturator. From Ranjith...

The technical problems to be solved are two fold All parts must be steam-sterilized and no abrasion can be tolerated in the chamber. For this the manufacturers offer various solutions in that the pressure plate is ... 

Fig. 2.43. Schema of a steam-sterilizable closing mechanism for vials. The pressure plate (1), by which the stoppers are pushed into the vials is sterilized jointly with the chamber. The shaft (2) to which the pressure plate is connected, moves into the chamber during stoppering. It is not sterilized with the chamber. Therefore the shaft is sterilized in a separate chamber (3). This chamber can also be connected to the vacuum pumping system (4) as to the steam supply (5). Water condensing during the sterilization can be drained by (6). A special seal (7) can (by (8)) also be connected to steam or vacuum, and be sterilized (schematic drawing from information by AMSCO Finn-Aqua, D-50354 Hiirth).

The other common laboratory method uses pressure plates and membranes to measure the amount of water held by soil at various pressures (Figure 5.15). One advantage of this method is that it gives a pressure value that can be used in many calculations relevant to movement of water in soil. The plates in the apparatus shown are used in the pressure range of -10 to -30 kPa. Other... 

Figure 5.15. Pressure apparatus for measuring the amount of water held in soil at different pressures the pressure gage is to the left and a pressure plate is on top of the vessel.

In the laboratory, soil water content is measured by drying in the oven and with a pressure plate apparatus. Drying soil can change the form and species of components present, and for this reason, most soils are air dried carefully or at temperatures only slightly above room temperature before analysis. A number of different field measuring methods are used mostly to determine the amount of water available for plant use. 

Using any available resources, find out how pressure plate methods for determining soil moisture levels work. 

If it is necessary or desirable, water can be extracted from unsaturated soils in the laboratory. This requires either pressure or suction to move water from the soil. A common laboratory method for removing water from unsaturated soils is the pressure plate (see Figure 7.13). Plates for this type of extractor can be used for extraction of water at field capacity 33 kPa and at permanent wilting point - --1500 kPa.3... 

Figure 7.13. Pressure plate for removing water from soil at various pressures. 

One product that has been developed for mercury cells is a loose liner (Fig. 23.14), which is fitted on-site in the anode workshop and fastened with titanium nuts (Fig. 23.15). The riser tube is tightened using a Bakelite pressure plate. 

The mine is buried underground, near the surface and when somebody steps on pressure plate, the firing pin detonates initiating charge of the fuze primer and the shock is transmitted to Tetryl charge of the mine... 

Cluster ejection cartridge Pressure plate Casing... 

The chamber floor is slanted toward the condensate discharge. The floor is further reinforced with a pressure plate. 

MATERIALS OF CONSTRUCTION PRESSURE PLATE CONNECTING PLATE ... 

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