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Other topologies include the paraphrase, floating paraphrase and differential (long-tailed pair). a driver stage. This gives further voltage gain for each of the push–pull signals, and depending on the output stage valve's requirements may be a type selected for higher voltage or lower Z drive capability.
In addition, small resistors (much less than the load impedance, not shown in the schematic) are added in series with each amplifier's output to enable proper current sharing between the amplifiers. These resistances are necessary because the output impedance of the two amplifiers will not, due to manufacturing variation, be perfectly identical.
Boston valve: three-part two-port check valve used on inflatable boats, air mattresses, airbeds etc.; available in two sizes, normal and small; Ceramic valve, used mainly in high duty cycle applications or on abrasive fluids. Ceramic disc can also provide Class IV seat leakage; Cock: colloquial term for a small valve or a stopcock
The main benefit of the desmodromic system is the prevention of valve float at high rpm. In traditional spring-valve actuation, as engine speed increases, the inertia of the valve will eventually overcome the spring's ability to close it completely before the piston reaches top dead centre (TDC). This can lead to several problems.
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, who were owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...
FPO – floating production and offloading – vessel with no or very limited (process only) on-board produced fluid storage capacity. FPSO – floating production storage and offloading vessel; FPU – floating processing unit; FRA – fracture log; FRARE – fracture report; FRES – final reserve report; FS – fail safe; FSB – flowline ...
The valve is often described as a needle valve, although this is a misnomer. A true needle valve uses a tapered needle in a tapered seat, so as to provide fine control over flow rate. The float valve uses a pointed needle against a square-edged seat, to give a positive shut-off. As the float relies on gravity, the chamber must be mounted ...
The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...
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