Applications:
chemical installations, pharmaceutica, food, laboratiories of high requirements for the quality of the product, its chemical resistance or abili-ty to sterilise the installation, enamelled, rubber lined or plaited vessels and reactors, plastic pipelines, plastic lined glass, valves and labora-tory fittings and installations.
SPETOFLON® FU GUS gaskets with inserts from SPETOGRAF® GUS 20 or GUS 40 have the best resistance to ageing, recovery, compres-sive strength and temperature limit of 260oC; due to its reinforcements and thermal stability especially at high compressive loads and elevated temperatures SPETOGRAF® GUS 40 is recommended as the insert; width of the envelpope may be limited to the flange face area, whereas centring (types with “Z” index) can result from selection of the appropriate dimensions of the insert.
Gaskets manufactured by inserting ceramic felt ring SPETOTERM® TUI 70 into SPETOFLON® FU envelpope; such construction gives very good conformability but its recovery is very limited; applied in enamelled flanges at low pressures.
Gaskets manufactured by inserting SPETOBAR® BAS 300 gasket into SPETOFLON® FU envelope for the service temperatures up to 150oC at small and medium diameters; PTFE envelope gives excellent chemical resistance and BAS 300 improves recovery and inhibit creep relaxation of PTFE; gasket may be equipped with centring ring from SPETOBAR® BAS 300, thus the envelope has the sime width as flange faces (in this case addidional designation “Z”).
SPETOFLON® FY envelope manufactured by means of slitting PTFE rings and is an economical alternative to FU envelope; recommen-ded maximum thickness of the insert in FY envelope is 2mm, thickness of the PTFE envelopes, similarily to FU style, 0,5 mm
SPETOFLON® FU envelope is manufactured from virgin, sintered PTFE of 2,10 g/cm3 density in the profile shown on the drawing; the jacket has anti-difusion zone on the inner circumference which protects the material of the instert from contact with medium; thickness of the insert in practice is not limited; gasket’s construction minimizes non-active space in the joint and provides erosion resistance in case of high flow velocity of the medium.
SPETOFLON® FU gaskets have corrugated ring (types with “J” index) and two soft layers which allow for very thick constructions (e.g. 10,5 mm) accomodating large inequalities (even several milimeters) in the enamelled flange faces; also in this case the best age-ing characteristics, good recovery, excellent conformability have the gaskets with insterts from SPETOGRAF® GUS 20 i SPETOGRAF® GUS 40 for temperatures up to 260oC; SPETOTERM® TUI 70 insert has very good conformability but due to limited recovery it is re-commended for lower pressures; SPETOBAR® BAS 300 inserts are very good for the service conditions up to 150oC also when the pres-sure will change but thei conformability is worse than SPETOGRAF® GUS or SPETOTERM® TUI 70; special styles may have two corru-gated rings with a flat steel insert between them, e.g. FU GUS 40JIJ lub FU GUS 40JIJZ, index “Z” indicates that metal element per-forms the centring function.
Kammprofile gaskets, e.g. SPETOMET® MWK 50 or MWK 60 in SPETOFLON® FU envelope; this construction prevents the contact betwe-en metal and the sealed medium; while selecting dimension of the kammprofile gasket, thickness of the PTFE envelope must be consi-dered; in case of the insert from corrugated ring, it can be applied together with SPETOFLON® FU envelope covering the ring (FU MPL 12) or only its sealing area (FU MPL 12 Z).
Gaskets manufactured from soft material of good elasticity and strength characteristics selected for the service temperature, with two layers of PTFE foil and metal inner eyelet increasing blowout resistance and preventing chemical degradation of the gasket material by the contained medium and gives erosion resistance in case of graphite inserts; soft material inserts from SPETOBAR®BAS family (recommended BAS 300) or SPETOGRAF® (GUS 20 is recommended for lower temperatures and loads whereas GUS 40 for more severe service conditions); metal eyelets from chrome-nickel steel; the construction is an economical alternative to FU or FY envelope gaskets but applicable only in steel flanges.
Kammprofile gaskets, e.g. SPETOMET® MWK 50 or MWK 60 in SPETOFLON® FU envelope; this construction prevents the contact betwe-en metal and the sealed medium; while selecting dimension of the kammprofile gasket, thickness of the PTFE envelope must be consi-dered; in case of the insert from corrugated ring, it can be applied together with SPETOFLON® FU envelope covering the ring (FU MPL 12) or only its sealing area (FU MPL 12 Z).
Custom styles:
- reverse envelope for gaskets exposed to medium acting on their outer circumference or envelopes protecting inner and outer part of the insert
- gaskets manufactured as PTFE layers + inner/outer eyelet made also from PTFE for various shapes of of gaskets (e.g. eliptical)
- full face gaskets with bolt holes
- gasket with engineered contact surfaces increasing local compression
- jackets from filled PTFE
- inserts from material in accordance with individual requirement (any material lor shape)
- gaskets with additional andi-difusion barrier from ePTFE
- gaskets with specially engineered surface of the inner circumference which minimizes non-active area of the gasket
- gaskets with locating lugs to aid assembly
Availability:
Gaskets according to the following norms:
EN 1514-3
EN 12560-3
