Leader Spiral Wound GasketsHigh Integrity SPW Gaskets

Leader Spiral Wound Gasket Type SRI

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Description

Designed more than 100 years ago, 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. Most used filler materials are Graphite and PTFE or LeaderTHERM NXT 1000 (high temp. modified Phlogopite). Due to the gasket construction, SWG’s offer high compressibility and recovery. Leader Style SRI SWG’s are provided with an innerand outer guide ring. These gaskets are suitable for ASME B16.5 raised faced flanges up to 2500 lbs and for EN/DIN flanges up to PN400.

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Product Data Sheet

Application

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

Advtantages

Universal gasket

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. Temperature from –450 °F up to 850 °F (steam up to 1200 °F)

Delivery Options

Standard style S gaskets are normally manufactured according to particular customer drawings, or by given sizes. Gaskets can be manufactured in a thickness of .125" / .175" / .250" / 285". Different materials are available.

Temperature

Approvals & Certificates

TA-Luft
BAM
TA-Luft
Fire Safe
BAM
EN10.204 3.1

Sealing Characteristics

low leak rate
Firesafe
non-sticking to the flanges
blow out safe
Design suitable for fluctuating temperatures and pressures
broad chemical resistance (pending on the metallic materials and filler)
wide seating stress range

Technical Data
max Temperature [°F]	See material table below
max Pressure [psi]	ASME B16.5 2500 Class
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
Gasket required flange roughness [Ra micron]	3,2-6,3
Gasket required flange roughness [RMS]	125-250
max Seating stress [Qsmax bei RT EN13555] [n/mm2]	300
Advice Seating stress at assembly [psi]	12500
ROTT [Gb]	926
ROTT [a]	0.341
ROTT [Gs"]	2.9

Leader Spiral Wound Gasket Type SI

The sealing element with inner ring. The “SI” SWG’s are manufactured with an inner ring, sealing element – winding material(SS316L, SS321…) and the soft fillers - graphite, PTFE, LeaderTHERM NXT 1000 (high temp. modified Phlogopi...

Leader Spiral Wound Gasket Type SR

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

Leader Spiral Wound Gasket Type S

The sealing element - no inner- and outer guide ring. The “S” SWG´s are manufactured in sealing element - winding material (SS316L, SS321…) and the soft fillers - graphite, PTFE, LeaderTHERM NXT 1000 (high temp. modified Phlogopi...