波纹垫NPG-500A
CORRUGATED GASKET NPG-500A |
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采用金属薄板压制而成，回弹性能高，密封性能好。
用于各种工业的中低压场合的密封，尤其适合阀盖密封。
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These
are sheet metal gaskets with concentric surface
corrugations for better surface contact, in
which the spring effect fo the metal is also
utilized for upgrading its sealing quality.
A low seating stress equivalent to that for
a corrugated asbestos joint sheet is sufficient.
Futhermore, since the degree of heat-resistance
is almost the same as that of the metal jacket,
these are widely used in class 150 and 300
valve caps.
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齿形垫NPG-500B
SERRATED GASKET NPG-500B |
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采用一定厚度的金属板车削而成，高强度，低失弹，应用广泛。
可用于炼油、化工、石化工厂和火电、核电站 等高温、高压、蒸汽或气体管道，法兰连接和阀盖连接、非常适宜于窄面法兰连接。
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These
gasdets are used for high temperature and
high pressure steam, gas line valbve caps
and pipe flanges. they have sharp 60 or 90
concentric grooves machined at 1 mm pitch
over the plain metal surface. These sharp
points take up the surface contact pressure
very well and provide good sealing with a
low clamping force. Consequently , they are
very effective where a narrow flange width
is required and can be usefully employed where
heavy tightening is not possible because of
the material quality and construction of the
flange.
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