Leader Spiral Wound GasketsHigh Integrity SPW Gaskets

Leader Spiral Wound Gasket Type SI

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Description

Spiral Wound Gaskets (SWG’s) are widely used as high integrity and sustainable gaskets. The sealing element is manufactured from preformed, v-shaped metallic windings with intermediate soft sealing fillers. As standard metallic material for winding and inner ring SS316L is used and for the soft fillers, graphite, PTFE or LeaderTHERM NXT 1000 (high temp. modified Phlogopite). Due to the gaskets construction, SWG’s offer high compressibility and recovery. Leader Style SI SWG’s are provided with an inner ring. The SI gaskets are suitable for ASME B16.5 tongue and groove or male / female (Spigot to Recess) flanges up

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Product Data Sheet

Application

(Petro-) Chemical Industry, Steam, On- and Offshore exploration, pipeline systems, pressure vessels and exchangers.

Chemical Compatiblity

Spiral Wound Gaskets can be used in a wide variety of media, i.e. a pH range varying from 0-14. Application/ compatibility guide is available on request.

Delivery Options

Standard style SI gaskets are normally manufactured according to particular customer drawings, or by given sizes. Gaskets can be manufactured in a thickness of 2,5/3,2/4,5/6,4/7,2 mm. Different materials are available.

Temperature

Spiral Wound Gaskets "SI" can be used in a wide variety of media, temperature acc. to used material(table of materials); standard SS316L - 100 °C up to 550 °C.

Sealing Characteristics

low leak rate

Technical Data
max Temperature [°C]	See material table below
max Pressure [bar]	200
Minimum initial stress [DIN E 2505 part 2] [N/mm2]	50
Maximum initial stress [DIN E 2505 part 2] [N/mm2]	300
M-Value	3
Y- Value [psi]	10000
min Seating stress [Qmin(L 0,01), mg/(s*m)] at RT 40 bar [N/mm2]	33
Gasket required flange roughness [Ra micron]	3,2-6,3
Relaxation PQR (30 MPA 150°C) [%]	0.92
Residual seating stress , [QA=40 MPA,Qmin(L 0,01), mg/(s*m)] bei RT 40 bar [N/mm2]	10
ROTT [Gb]	926
ROTT [a]	0.341
ROTT [Gs"]	2.9
min Temperature [°C]	See material table below

Leader Spiral Wound Gasket Type SRI

Style “SRI” SWG’s are with an inner, outer guide ring, sealing element – winding material(SS316L, SS321…) and the soft fillers - graphite, PTFE, LeaderTHERM NXT 1000....

Leader Spiral Wound Gasket Type SR

Style “SR” SWG’s are with an outer guide ring, sealing element – winding material(SS316L, SS321…) and the soft fillers - graphite, PTFE, LeaderTHERM NXT 1000....