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 Nuclear Spiral Wound Gasket

Nuclear Spiral Wound Gasket


It is one of the most innovative and creative gaskets.

The graphite filler is nuclear grade flexible style.

Sealing capability is ≤1×10-7Pa•M3/s

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SUNWELL SW610 Zero leakage gasket is composed of stainless steel fixed inner and outer ring as well as industrial grade and unclear grade flexible graphite sealing rings which are specialized making. It's one of the most innovative and creative gaskets. Our idea of creative design conforms to occasions which with sudden change of temperature and fluctuation pressure.

Depend on its excellent compression resilience, it is suitable for sealing spots where the alteration of temperature and pressure are frequent.

Typical Applications

"ZERO" leakage gaskets provide the most effective sealing, the most reliable operation and he largest security assurances for middle and high pressure, high temperature or (and) fluctuation temperature, containers with nuclear safety level, equipments, valves, piping flange connecting.

Cooling water, steam, boric acid, air, nitrogen, demineralized water, oil, oxgen, 30% sodium hydroxide solution, and 7% nitric acid solution.

Prime Features

> Normal pressure: PN≤420 or Class≤2500

>Normal diameter: DN≤600 or NPS≤24

> Sealing Capability: ≤1×10-7Pa•M 3/s

> Temperature: ≤450oC(air-like oxidizing medium);≤650oC(steam)


> Conform to ASME, GB, EN, JIS and HG standards as well as the dimension of non-standard raised flange, tongue and groove flange or groove flange.

>Normal thickness: 4.4, 6.6, 10mm and so on.

>Both inner and outer fixed rings are made of 304 and 316L austenitic stainless steel. More informations, please click the "PDF" download or contact with us.


What's the difference between the regular standard gasket and nuclear gaskets?

SUNWELL: The nuclear spiral wound gaskets use the higher purity of graphite filler, the carbon content above than 99.9%, more lower sulphur content and fluoride-free.

Where to get the Speficication of the Nuclear Spiral Wound Gaskets?

SUNWELL: You can contact with sales@sunwellseals.com please.

How about the price of the nuclear spiral wound gaskets against the standard gaskets?

SUNWELL: Due to use the higher grade graphite filler, the price of nuclear spiral wound gaskets is a little bit higher than standard spiral wound gaskets.

But, it's not too much difference. You can contact with SUNWELLSEALS to ask for the price lists right now.