2017_IsolationKitCatalogNEW

SAINT FERRER ® VOLT ® SELECTION PROCESS

Dielectric strength is obtained by testing to ASTM D149, Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power frequencies. Water absorption is a value obtained by testing to ASTM D570, Standard Test Method for Water Absorption of Plastics. In this test, material specimens are submerged in water at an agreed upon condition, generally 23° C for 24 hours. The part’s water absorption is the increase in weight by percent found after submersion. It is not mandatory to know the maximum allowed water absorption, but doing so can help ensure a more appropriate selection. This step is a reminder that when choosing a gasket, sleeve, and washer combination, the physical properties of the lowest rated component are the maximum physical property of the entire combination. T—Type of Isolation Determine whether protection should be one- or two-side, i. e., whether to have washers on one or both sides of the flanged joint. Typically, one-side protection is used in conjunction with an overall cathodic protection system to isolate sections of pipe. Two-side protection merely insulates two flanges of different materials from each other. O—Operating Conditions The media and temperature. L—Lowest Rated Component

This section describes a procedure that may be used to select flange isolation products for the flanged joint and the technical information needed to select flange isolation products for given applications. The selection process involves collecting information about your application. To help with this process, you can use the Saint Ferrer ® VOLT ® table as a guide. Note that the steps do not necessarily have to be in the following sequence as long as the information is collected.

V

— Volts per mil

O

— Operating conditions

L

— Lowest rated component

T

— Type of protection

V—Volts/mil Specifically, you must know the required dielectric strength in Volts/mil. You might also want to know the isolation product’s maximum allowed water absorption in percent. Dielectric strength is the Voltage gradient at which dielectric failure of the isolating material occurs under the specific conditions of the test. The units are Volts/mil (mil being 1/1000th of an inch, not 1 mm). Thickness, temperature, electrical frequency, and many other factors affect a material’s dielectric strength. Therefore, when installed in the field, the dielectric strength of a material will vary from published values.

SAINT FERRER ® VOLT ® SELECTION MATRIX

Dielectric Strength (v/mil)

Joint Treatment

Isolating Washer

Backing Washer

Maximum Temp (°F)

Model No.

Type

Sleeve

Gasket

105-SW1

Sleeve and Washer

One side

Poly

Phenolic

Zinc Steel

None

105

400

105-SW2

Sleeve and Washer

Two side

Poly

Phenolic

Zinc Steel

None

105

400

105-EK1

Type E Sleeve and Washer

One side

Poly

Phenolic

Zinc Steel

CNA1500

105

400

105-EK2

Type E Sleeve and Washer

Two side

Poly

Phenolic

Zinc Steel

CNA1500

105

400

221-SW3

Sleeve and Washer

One side

BoPET

Phenolic

Zinc Steel

None

221

400

221-SW4

Sleeve and Washer

Two side

BoPET

Phenolic

Zinc Steel

None

221

400

221-EK3

Type E Sleeve and Washer

One side

BoPET

Phenolic

Zinc Steel

CNA1500

221

4000

221-EK4

Type E Sleeve and Washer

Two side

BoPET

Phenolic

Zinc Steel

CNA1500

221

400

V-E10N1

Type E Sleeve and Washer

One side

G10

G10

Zinc Steel

G10 with nitrile sealing element

200

530

V-E10N2

Type E Sleeve and Washer

Two side

G10

G10

Zinc Steel

G10 with nitrile sealing element

200

530

V-E10V1

Type E Sleeve and Washer

One side

G10

G10

Zinc Steel

G10 with FKM sealing element

285

530

V-E10V2

Type E Sleeve and Washer

Two side

G10

G10

Zinc Steel

G10 with FKM sealing element

285

530

V-EPN1

Type E Sleeve and Washer

One side

BoPET

Phenolic

Zinc Steel

Phenolic with nitrile sealing element

200

400

V-EPN2

Type E Sleeve and Washer

Two side

BoPET

Phenolic

Zinc Steel

Phenolic with nitrile sealing element

200

400

V-EPV1

Type E Sleeve and Washer

One side

BoPET

Phenolic

Zinc Steel

Phenolic with FKM sealing element

221

400

V-EPV2

Type E Sleeve and Washer

Two side

BoPET

Phenolic

Zinc Steel

Phenolic with FKM sealing element

221

400

Westermann BG

7

Made with FlippingBook Online newsletter