Movable elements

Disk Is the pressure eontaining movable element of a pressure relief valve that effeets elosure. 

Disc/seat The pressure-containing, movable element of an SRV which effects closure. 

This type of flow meter is normally used for water service, such as raw water supply and evaporator feed. The movable element is a circular disk which is attached to a central ball. A shaft is fastened to the ball and held in an inclined position by a cam or roller. The disk is mounted in a chamber which has spherical side walls and conical top and bottom surfaces. The fluid enters an opening in the spherical wall on one side of the partition and leaves through the other side. As the fluid flows through the chamber, the disk wobbles, or executes a nutating motion. Since the volume of fluid required to make the disc complete one revolution is known, the total flow through a nutating disc can be calculated by multiplying the number of disc rotations by the known volume of fluid. 

Valve trays have movable elements in the tray openings for adjusting the free area to the actual gas load. This widens the operating range and reduces the pressure drop at high gas loads. 

MOVABLE ELEMENTS INACTIVATE GENES FOR INDOLEACETIC ACID SYNTHESIS... 

Ball valves (see Figure 5-4) take their name from the ball-shaped, movable element in the center of the valve. Unlike a gate or globe valve, a ball valve does not lift the flow control device out of the process stream instead, the hollow ball rotates into the open or closed position. Ball valves offer very little restriction to flow. Most can be opened 100% with a quarter turn of the valve handle. 

The use of natural convection for heat removal from the core and in the intermediate circuits elimination of circulators and active movable elements in the plant design ... 

The use of a self-adjustable water-cooled reactor coupled with thermoelectric mode of heat conversion and natural circulation of coolant makes it possible to exclude movable elements from the technological circuit of an NPP and to secure a lifetime unattended operation without on-site refuelling in the course of 25 years. 

The disk, a movable element that controls the flow through the valve... 

Figure 3.21 — (A) Integrated FET with two hydrogen ion-sensitive FET elements. (B) Structure of enzyme-modified FET sensor S plastic card FET enzyme-modified FET chip lUM, immobilized urease membrane. (C) Flowthrough cell Bl fixed sensor cell block B2 movable sensor cell block SC flowthrough cell EC electrical connector RP silicone rubber sheet AMP amplifier. (Reproduced from [151] with permission of Elsevier Science Publishers).

Fuzes, MT M43 Series. The original M43 fuze was developed to fulfil the requirement for a single-purpose MT fuze for antiaircraft use with medium caliber shell fitted with the same booster as other standard fuzes. All modifications have the contour which is characteristic of modern design fuzes. They provide for time setting to 30 seconds and are without impact element (See Fig 1-89) The fuze body for the M43 to M43A4 fuzes is in three parts an upper cap, a movable lower cap, and a fixed base (W). 

These operate by sliding a movable contact or wiper over a resistance element. The contact motion can be translational, rotational or a combination of both depending upon the device providing the displacement (e.g. Bourdon tube, diaphragm, etc.). If no current is drawn from the meter then the output voltage V0 will... 

Due to the Helmholtz-Lagrange relation, no greater flexibility in the parameters determining the image is possible. However, lenses with even more elements than four can have other advantages, such as lower aberration or a more extended operation range. (See, for example, the movable electrostatic lens in [Rea83].)... 

The inductance-type transducer consists of three parts a coil, a movable magnetic core, and a pressure sensing element. The element is attached to the core, and, as pressure varies, the element causes the core to move inside the coil. An AC voltage is applied to the coil, and, as the core moves, the inductance of the coil changes. The current through the coil will increase as the inductance decreases. For increased sensitivity, the coil can be separated into two coils by utilizing a center tap, as shown in Figure 7. As the core moves within the coils, the inductance of one coil will increase, while the other will decrease. 

The primary coil is wound around the center of the tube. The secondary coil is divided with one half wound around each end of the tube. Each end is wound in the opposite direction, which causes the voltages induced to oppose one another. A core, positioned by a pressure element, is movable within the tube. When the core is in the lower position, the lower half of the secondary coil provides the output. When the core is in the upper position, the upper half of the secondary coil provides the output. The magnitude and direction of the output depends on the amount the core is displaced from its center position. When the core is in the mid-position, there is no secondary output. 

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