Keywords:Gaskets,Spiral Wound Gasket,Professional Manufacturers & Suppliers of gaskets and gland packing
		Semi-metal Gasket Series
		Spiral Wound Gasket              Rreinforced Graphite Gasket              Metal Jacketed Gasket
		Heat Exchanger Gasket             Spiral Wound Exhaust Pipe Gasket     Cylinder Gasket & Engine Gasket
		Double Jacketed Gasket

Spiral Wound Gasket

Item No.:ZD-G1200

Description:Spiral wound gaskets are special semi-metallic gaskets of great resilience, therefore they are very suitable for applications featuring heavy operating conditions, Spiral wound gaskets are manufactured by spirally winding a V-shaped metal strip and a strip of non-metallic filler material. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. Spiral wound gaskets can be reinforced by an outer centering ring and/or inner retaining ring. The outer centering ring controls the compression and holds the gasket centrally within the bolt circle. The inner retaining ring increases the axial rigidity and resilience of the gasket. Spiral wound gaskets should always be in contact with the flange and should not protrude into the pipe or project from the flange.

Application:Spiral wound gaskets can be used for sealing flange joints, manhole and handhold covers, tube covers, boilers, heat exchangers, pressure vessels, pumps, compressors and valves; in industries such as petrochemical, pharmaceutical, shipbuilding, and food processing, in power industries and nuclear power stations. They are ideal for steam, oil, liquids, gases, acids, alkalines, various organic mediums and solvents.

The Material:

1. Metal strap
A. made of 08F，0Cr13, 0Cr18Ni19Ti, 0Cr18Ni9Ti, 00Cr18Ni10, 0Cr18Ni12Mo2Ti, 00Cr17Ni14Mo2 cold-rolled steel strap with a thickness of 0.15mm~0.25mm or decided by the supplier and acquirer.
B. the metal strap should be pre-molding V-shaped or W-shaped narrow strap with smooth and clean surface, without any defects, such as roughness, cracks, scratches, drop pits or rusty spot, etc.
C. Hardness value of the stainless steel HV≤200

2. Non-metal strap
A. the non-metal packing material is specially-made asbestos strap, flexible graphite strap, PTFE strap, non-asbestos fiber strap and isinglass strap with a thickness of 0.3-1.0mm.
B. loss of weight on ignition of specially-made asbestos should be ≤25%.
C. chlorine ion content of non-metal strap should be ≤100PPM.
D. the recommended temperature and pressure of various medium and different metal straps.

Table1:

media    material	asbestos	graphite	non-asbestos	PTFE
Water-type media	600℃，CL 2500	550℃，CL 1500	350℃，CL 1500	-200-260℃， CL 1500
oil-type media	500℃，CL 1500	550℃，CL 600	350℃，CL 600	-200-260℃， CL 600
gas-type media	400℃，CL 600	550℃，CL 400	350℃，CL 400	200-260℃， CL 400

Note: used with non-oxygenization media, graphite can reach 800℃.

　

Table 2:

materials	temperature  ℃	maximum work pressure	applied media	compression ratio %	resilience ratio %	Stress relaxation force %
Expansion graphite	-220--550	250 BAR	corrosion media	18--30	≥17	≤18
specially-made asbestos strap	-200---600			18--30	≥19	≤28
PTFE	-200-- 250	100 BAR	corrosion media	18--30	≥15	≤13
Non-asbestos materials	-100--250	100 BAR	general air sealing	18--30	≥19	≤28
isinglass	-150--800	100 BAR	special high temperature	18--30

3) Strengthening ring. Unless specially agreed, the internal strengthening material should be the same with that of metal strap, and the materials of external strengthening ring should be A3 steel and have received anticorrosive treatment.

The main style of spiral wound gasket：

 The material & configuration of spiral wound gasket：

Main Specification：

The style of flange and suitable spiral wound gasket style ：

Terence of spiral wound gasket：

We can also produce as standard of JIS,JPI or as request.

How to Order: