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SPIRAL WOUND GASKET WR

ISO 9001 : 2000 Certified

The WR style is constructed with a metallic guide ring, metallic winding and a filler element. The winding is manufactured from metal in a complicated form of a spiral, in assembly with a filler material. The metallic winding, of special profile, provides excellent resistance, compensating the changes in operational conditions such as: variations of pressure and temperature, vibrations, thermal shocks, etc. The filler materials fill the irregularities of the flanges, assuring an airtight seal. Its external guide ring has the function of centering the gasket in the flanges and gives the sealing elements additional resistance to the flow pressure, avoiding also excessive bolt torque.

Applications //

For applications with high temperature variations (thermal cycling), and/or pressure variations, and/or flange rotation problems etc., gaskets with adequate residual stress (stress retention), flexibility and recovery are needed. The spiral-wound gaskets have been designed to meet these demanding requirements.

Properties//


Filler Material	Max. Temperature
Mica Graphite (Pink color)	232°C (450°F)
Flexible Graphite (Gray color)	450°C (842°F)*
PTFE (White color)	260°C (500°F)

* Up to 650°C (1 200°F) with steam and under inert conditions.

Depending on the combination between the Metallic Winding and the Filler, they range in vaccum to 10 000 PSI.

Metallic Strip//


304SS	Yellow
316SS	Green
347SS	Blue

Dimensions by Pressure Class per ASME B16.20-1993 Flanges (Dimensions in inches)//

	Gasket O.D.		Gasket I.D.
psi	150,300	150,300
psi	400,600	2500	150	300	400	600	900	1500	2500
Nominal Pipe Size
1/2	1.25	1.25	0.75	0.75	0.75	0.75	0.75	0.75	0.75
3/4	1.56	1.56	1.00	1.00	1.00	1.00	1.00	1.00	1.00
1	1.88	1.88	1.25	1.25	1.25	1.25	1.25	1.25	1.25
1-1/4	2.38	2.38	1.88	1.88	1.88	1.88	1.56	1.56	1.56
1-1/2	2.75	2.75	2.13	2.13	2.13	2.13	1.88	1.88	1.88
2	3.38	3.38	2.75	2.75	2.75	2.75	2.31	2.31	2.31
2-1/2	3.88	3.88	3.25	3.25	3.25	3.25	2.75	2.75	2.75
3	4.75	4.75	4.00	4.00	4.00	4.00	3.75	3.63	3.63
4	5.88	5.88	5.00	5.00	4.75	4.75	4.75	4.63	4.63
5	7.00	7.00	6.13	6.13	5.81	5.81	5.81	5.63	5.63
6	8.25	8.25	7.19	7.19	6.88	6.88	6.88	6.75	6.75
8	10.38	10.13	9.19	9.19	8.88	8.88	8.75	8.50	8.50
10	12.50	12.25	11.31	11.31	10.81	10.81	10.88	10.50	10.63
12	14.75	14.50	13.38	13.38	12.88	12.88	12.75	12.75	12.50
14	16.00	15.75	14.63	14.63	14.25	14.25	14.00	14.25	-
16	18.25	18.00	16.63	16.63	16.25	16.25	16.25	16.00	-
18	20.75	20.50	18.69	18.69	18.50	18.50	18.25	18.25	-
20	22.75	22.50	20.69	20.69	20.50	20.50	20.50	20.25	-
24	27.00	26.75	24.75	24.75	24.75	24.75	24.75	24.25	-

Centering Ring O.D.

psi	150	300	400	600	900	1500	2500
Nominal Pipe Size
1/2	1.88	2.13	2.13	2.13	2.50	2.50	2.75
3/4	2.25	2.63	2.63	2.63	2.75	2.75	3.00
1	2.63	2.88	2.88	2.88	3.13	3.13	3.38
1-1/4	3.00	3.25	3.25	3.25	3.50	3.50	4.13
1-1/2	3.38	3.75	3.75	3.75	3.88	3.88	4.63
2	4.13	4.38	4.38	4.38	5.63	5.63	5.75
2-1/2	4.88	5.13	5.13	5.13	6.50	6.50	6.63
3	5.38	5.88	5.88	5.88	6.63	6.88	7.75
4	6.88	7.13	7.00	7.63	8.13	8.25	9.25
5	7.75	8.50	8.38	9.50	9.75	10.00	11.00
6	8.75	9.88	9.75	10.50	11.38	11.13	12.50
8	11.00	12.13	12.00	12.63	14.13	13.88	15.25
10	13.38	14.25	14.13	15.75	17.13	17.13	18.75
12	16.13	16.63	16.50	18.00	19.63	20.50	21.63
14	17.75	19.13	19.00	19.38	20.50	22.75	-

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