Spiral wound gaskets - SPETOSPIR^® S, SW, SZ, SWZ and variations

SPETOSPIR^® S - spiral wound gasket made from alternate layers of metal strip and filler; reinforced only by the metal piles welded together, wound around the soft filler. S style is applied in male and female, tongue and groove flange, also in the joints with so called multi-channel load transmission.

SPETOSPIR^® SW gasket with inner ring providing additional strength, made from the same metal as the strips; besides giving strength, the ring fills the space between flange bore and the inside diameter, minimizes erosion of flange faces; applied in male and female flanges, even in very high pressures.

SPETOSPIR^® SZ gasket with outer centring ring, facilitating proper installation of the gasket; outer ring also protects gasket from blowout and provides the space for coding the gaskets with digits, letters and colour, which inform about the gasket’s style, materials and manufacturer; in some constructions used as a compression stop. Gasket engineered for flat and raised face flanges; for applications in flanges above PN63 (class 300) and when the filler is PTFE, SWZ style is recommended. As standard, centring ring is made from carbon steel, painted or galvanized.

SPETOSPIR^® SWZD gasket is a two zones gasket applied as antioxidation style for gaskets working in temperatures above 500oC – in the zone exposed to medium graphite, outside – mica, or as firesafe style of the PTFE filled spiral wound gasket, in such a case inner filler – PTFE, outer filler - graphite.

SPETOSPIR^® SnWZ gasket with inner ring made from te metal stip thinner than that applied in the sealing ares; it may result from the necessity of providing the gasket with very narrow ring e.g. when the active width of the gasket is optimized, or due to accessibility of non-standard alloys for the rings.

SPETOSPIR^® SnW gasket with the inner ring made from the metal strip thinner than that applied in the sealing area: such construction results from the necessity of providing the gasket with very narrow rings or the fact that its shape needs to be flexible during installation, e.g. in case of oval gaskets installed in inspection holes; solution also applied for non-standard alloys that require a centring ring.

SPETOSPIR^® SWZ gasket has two metal rings: outer (centring) and inner – reinforcing; due to „enclosing” the proper sealing element between the to rigid metal rings, the gasket has excellent compression resistance; the style recommended for flat face and raised face flanges over PN 63 (class 300), for gaskets with PTFE filler also of lower PN; for gaskets of large dimensions (above 800 mm) suggested as standard. The standard inner ring is made from the same material as gasket’s metal strip in the sealing area.