10:36
The maximum stress con-
cent {fight|spell} occurs on the surface of the valve's
cone-shaped seat and in the region {the place that the} diameter
changes from {the top} to the stem. During opera-
tion, the temperature in the centre of the {deplete}
valve may be between 1023 and 1123 {P} and in the
{wall plug|wall socket} valve between 723 and 823 K. As the
mechanical and thermal {challenges are} cyclic, if
{inability} {occurs} it is of a fatigue nature.
{Thanks} to exposure to both {active|energetic} inertia loads
and the products of {combustable} at these high
working {temperature ranges|conditions}, the surfaces of the valve
may oxidize and corrode faster. The {device|regulators} seat
work {firms} {as a consequence|a consequence of} to hammering in service, and
any {and also carbon} {put in|pay in} {between your} seats {grows}
severe stress concentrations. {Virtually any} gas leakage be-
tween the seats also {grows} local overheating which may cause mechanical failure, {daub}
or warping, {and ultimately} {using} of the valve's cone-shaped {seats|couch}.
To {increase the} useful service life, the {regulators} should withstand the high {functioning} tempera-
ture, {energetic} {strains|challenges} and the rust environment, and have good wear resistance under all
{functioning} conditions. The {condition} of the valve should {enable the} exhaust {smells} to {movement|stream} with very
little {amount of resistance} between the valve and it and around the exposed {section} of the stem
without absorbing {surplus|overabundance of} heat. {As well} {it may} have {a piece} {satisfactory} {to handle|to manage} up to the {challenges}
developed {as a result of} repeated impact {a lot}.
The exhaust {device|regulators} should have
(a) sufficient {durability} and hardness of {avoid} stretching and {scrubbing|chaffing} wear of the {device|regulators}
{base},
(b) {satisfactory} hot {durability} and hardness to {avoid} cupping of the {brain} and rapid {seats|couch} wear,
(c) good {tiredness} {amount of resistance} to combat the regular cyclic stress {reloading|packing},
(d) good creep {capacity} prevent the head from {completely|forever|once and for all} deforming when {functioning}
at high temperatures and under alternating loads,
(e) good corrosion and oxidation process resistance at high {functioning} temperatures and {strains|challenges}
and in {a working} rust environment,
(/) {an average} {ratio} of thermal {development|enlargement} to limit the {energy|cold weather} {challenges} {because of|credited|thanks} to the
large {heat|temp|temperatures} gradient over the {mind|brain}, and
(g) good {heat|energy|cold weather} conductivity from the valve's head, so that the heat from {combustable} can
be licentious {conveniently}.
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