Leader Spiral Wound GasketsHigh Integrity SPW Gaskets

Leader Spiral Wound Gasket Type SR

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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 SR SWG’s are provided with an outer guide ring. The SR gaskets are suitable for ASME B16.5 raised faced flanges up to 600lbs and for EN/DIN flanges up to PN40. We strongly recommend to use SRI gaskets with inner guide ring in all circumstances.

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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. 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

EN10.204 3.1

Sealing Characteristics

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

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 SRI

The sealing element with inner- and outer guide ring. The “SRI” SWG’s are manufactured with an inner, outer guide ring, sealing element – winding material(SS316L, SS321…) and the soft fillers - graphite, PTFE, LeaderTHERM NXT 100...

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 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...