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How to choose
spiral wound gasket?
 Metal
spiral wound gasket, sealing is an
important component, has been widely used in petroleum, chemical,
metallurgy, power generation, shipbuilding and other industries, is
currently China’s pressure piping, valves, pumps, heat exchangers and
other equipment of the key components static seal . So, the selection
and use of high-quality metal
spiral wound gasket products in
order to reduce and stop running, take, drop, leak, ensure the host
equipment, safety, pressure pipeline running normally of great
significance. How to choose metal
spiral wound gasket do?
First, buy metal
spiral wound gasket products should
pay attention to the following points:
1.according to working
conditions, flange gasket sealing surface type selection.
2.selection of quality
management system is sound and effective operation of the production
company’s products, the best choice to hold special equipment (pressure
piping components) manufacturing license and valid type test report of
the enterprise.
3.gasket sealing the main impact
on the performance of the surface does not allow wounds, gaps, uneven
and full of rusty spot defects. With the main non-metallic gasket
surface should be uniform, the appropriate higher metal band, interlayer
texture should be clear, but not exposed metal belt. Metal spiral wound
gasket pad spacing should be uniform, there should be no defects such as
fusion or melting off. Strengthen the ring surface, there should be no
glitches, rugged, stain and other defects, the main body of the upper
and lower gasket sealing surface with the strengthening of the upper and
lower surface of the ring spacing should be strengthened within the same
ring and the gasket should be tightly fixed between the main body can
not be loose; outside the strengthening of Central and
gasket should be maintained between
the main body can be properly positioned loose.
4.compression rate, resilience
and sealing
gasket performance is an important
performance indicators, in general, to meet the requirements under the
premise of compression ratio, the higher the better resilience; and
resilience to meet the requirements of the standard premise, the
compression ratio test value is also bigger is better. Should choose a
good sealing performance, a moderate compression ratio and the
resilience of products as large as possible.
Second, installation of metal
spiral wound gaskets should pay
attention to the following points:
1.double-check before
installation flange, bolts, nuts and gaskets quality, carefully check
the flange or interface installation scenarios, with or without partial
mouth, the wrong mouth, opens his mouth the wrong holes and other
defects.
2.flange or the sealing parts of
the surface to be cleaned, gasket surfaces and bolt, screw on the
adhesion of mechanical impurities are not allowed.
3.gasket can not hold partial,
should ensure that uniform pressure.
4.force should be evenly tighten
nuts, bolts should be evenly symmetrically sub 2 ~ 3 times tightened, so
that uniform gasket compression.
>>The
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