Expanded Graphite Die-Formed Ring

Expanded Graphite Die-Formed Ring

Cixi Sinston Sealing MaterialCo., one of main exporters and manufacturers of Sealing material, insulation material and high Strength Fasteners in China .The following is about Expanded Graphite Die-Formed Ring related, I hope to help you better understand Expanded Graphite Die-Formed Ring.

Model:SINSTON ZR-790

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Product Description

Expanded Graphite Die-Formed Ring:

SINSTON die formed ring are made of low-sulphur expanded graphite without any fillers or binders. They are compressed in precise moulding tools to the required density. Due to the high purity of the material (>98%), no special corrosion protection is required. In general, it has square section and also has V-shaped and wedge-shaped section, the rear two kinds style are suitable for high pressure sealing. 


SINSTON  ZR-790 Expanded Graphite Die-formed ring 

SINSTON ZR-790RReinforced Die formed Graphite Ring

Moulded from pure flexible graphite with reinforcement, the insert materials stainless steel foil or mesh etc. are available on request. To protect against oxidation, the stainless steel cap is necessary.

SINSTON ZR-790CDie formed Graphite Ring with Corrosion Inhibitor

Corrosion inhibitor acts as a sacrificial anode to protect the valve stem and the stuffing box.

SINSTON ZR-790EC is reinforced graphite ring with corrosion inhibitor.

SINSTON ZR-792 Expanded Graphite Self-sealing ring

SINSTON ZR798(T) Expanded Graphite Gasket and SS316 Tanged insert Formed Ring



It has all properties of expanded graphite, can bear violent alteration of temperature and pressure. It is ideal packing for valves and static seal in almost all applications. Can be used as stand-alone packing or in combination SINSTNO ZR-544 high carbon fiber anti-extrusion packing rings, except when stems are severely damaged.

SINSTON have cooperation with more famous Valve manufacturer in the world.




Fans (Dry running)






800 Bar

Shaft speed





1.2~1.75g/cm3 (Normal: 1.6g/cm3)


-220~+550deC (+2800deC in non-oxidizing environment)

PH range




As pre-pressed rings (full or split)

Straight cut and slanted cut on request.                

Supply size:

Min. cross section:  3mm

Max. diameter:     1000mm 


For special profiles, rectangular, with inner- or outer bevel, with cap, please offer detailed drawing & sizes.

Graphite of nuclear grade (99.5%) on request.


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