GORE

Gasket Tape

Series 1000

INSTALLATION GUIDE

ATTENTION

When installing GORE

Gasket Tape Series 1000 in joints with multiple (2 or more) gaskets compressed with a single

set of bolts or clamps, see the installation supplement “Installation on Joints with Multiple Gaskets” for additional

mandatory instructions.

Preparation

Assemble required tools and materials

▪

Appropriate size and amount of GORE

Gasket Tape

Series 1000 as determined by this guide

▪

GORE

Gasket Tape Series 1000 shimming tape, if

needed, as determined by this guide

▪

Fasteners and ancillary items such as spring washers as

speciﬁed by ﬂange manufacturer

▪

Calibrated torque wrench(s)

▪

Sharp straight edge knife

▪

Knife sharpener

▪

Optional skive cutting guide tool

▪

For use of 6 mm base layer and possible shimming:

Feeler gauges for 1.7, 3.2, 4.7 mm (0.07, 0.13, 0.19 in.)

with ±0.1 mm accuracy

▪

For use of 9 mm base layer only: Feeler gauge for

2.5 mm (0.10 in.) with ±0.1 mm accuracy

▪

Fine tip permanent marker (for gasket tape)

▪

Large tip permanent marker (for ﬂange)

▪

Glass cleaning and drying supplies

▪

Fastener cleaning and lubricating supplies

▪

PPE as required by site, including cut-resistant gloves

and eye protection

▪

Approved ﬂange-speciﬁc installation torque target

1.1 Obtain ﬂange dimensions needed for gasket

selection

Determine ﬂange ID, ﬂange OD and sealing surface width

before ﬂange rounding (Figure 1). Determine ﬂange

circumference for gasket tape length.

1.2 Measure Flange Deviations

Measure and mark ﬂange surface deviation around

full ﬂange circumference to within ±0.1 mm, for use in

selection of gasket thickness (Section 1.4) and shimming

requirements (Section 1.5). Figure 6 illustrates an example

of completed ﬂange deviation markings and associated

shimming.

ATTENTION

Ensure that ﬂanges are clean of all contamination

and debris that could cause errors in ﬂange

deviation measurement.

Place a separator between the ﬂanges to avoid glass-

to-glass contact while measuring ﬂange deviation.

Separator material must be ﬂat and uniform thickness,

non-compressible under the weight of the top ﬂange

placement, and thin / ﬂexible enough to conform to

bottom ﬂange deviations during measurement (example:

ﬁber board). Close and align the ﬂanges without

compressive load beyond equipment weight. Around the

entire ﬂange circumference, use a feeler gauge to measure

the deviation between the top / removable ﬂange and the

non-compressible separator, to an accuracy of ± 0.1 mm

(±0.01”). It may be necessary to carefully manipulate the

separator with the feeler gauge, so that all ﬂange deviation

can be measured from one side of the separator. On the

stationary / bottom ﬂange, mark all start and end points

where the prescribed thickness of feeler gauge could be

inserted. Refer to required tools for speciﬁc feeler gauge

requirements. Refer to Table 2 and Figure 6 for additional

detail, based on use of a 6mm base layer. Be sure to mark

a ﬂange reference mark on both ﬂanges to allow for ﬂange

realignment at assembly. Remove separator.

FIGURE 1. Determining Gasket Dimensions.

Inset: Gasket Width and Placement

Sealing

surface

width

(contacting

glass

surface)

Minimum

gasket

width

1.3 Select Gasket Width

Minimum gasket width is full coverage of the contacting

glass surfaces. Ideal gasket width extends from ﬂange ID

to OD, as shown in Figure 1 inset. Excess material should

be distributed evenly beyond ID and OD to keep the barrier

core roughly centered on the ﬂange sealing surface.

Excess OD must not interfere with clamp placement.

1.4 Select Gasket (Base Layer) Thickness

Most applications require a base layer of 6 mm (1/4”)

tape, which can accommodate deviation up to 1.7 mm

(0.07”) without shimming. Applications with deviation

up to 2.5 mm (0.10”) can utilize 9 mm (3/8”) tape without

shimming.

1.5 Select Shimming

To effectively seal ﬂanges with deviations beyond the

maximum for the base layer, additional shimming material

is required. Use 3 mm (1/8”) GORE

Series 1000 shim tape

as directed in Section 2.6. Ensure the shimming material

has the same width as the base layer.

Gasket Installation

2.1 Open Flanged Connection

For ease of installation, open the ﬂanges a minimum of

15 cm (6”). Ensure the ﬂanges are well secured for a safe

working environment.

2.2 Clean and Dry Sealing Surface Thoroughly

To ensure optimal adhesion, remove all oil, graphite,

and/or other residue. Flange surface must be clean and

completely dry for the gasket placement adhesive to

adhere on glass.

2.3 Perform Initial Skive Cut

Unwind about 0.5 m (1.5 ft) of GORE

Gasket Tape Series

1000. Cut the end with a sharp knife on a clean, ﬁrm

surface using the skiving technique. It is recommended

that the ﬁrst skive cut be made in a convenient location

but not on ﬂange surface (Figure 2). Hint: Mark the desired

straight diagonal line on the side of the gasket tape with a

ﬁne tip permanent marker.

FIGURE 2. First Skive Cut

TABLE 1. Skive Dimensions

Tape thickness

(t)

Skive cut length

(Ls)

Thickest skive

section (h), at

target of ~1.3x (t)

6 mm (1/4”) 30–40 mm (1 1/4”) 8 mm (1/3”)

9 mm (3/8”) 45–60 mm (2”) 12 mm (1/2”)

3 mm (1/8”) 15-20 mm (3/4”) N/A

The length of the skive cut (Ls), should match the

dimension in Table 1. Avoid making it shorter. The resulting

skive angle is approximately 10°.

ATTENTION

When using the skiving technique to cut the gasket

tape, it is critical that the skive end meets the ﬂange

smoothly, avoiding any step. Refer to Figure 2.

2.4 Apply Base Layer of Gasket Tape

When positioning the skived end of the gasket tape on

the ﬂange to start the base layer, the skived end must

be at a location of a clamp or bolt, and must be where

no shimming is needed. Ideally the location would have

minimal ﬂange deviation, even within the allowable

deviation for the base layer. Try to avoid locations where

obstructions will hinder access for the second skive cut.

Remove the adhesive’s backing immediately before the

the gasket tape is installed, to prevent the adhesive strip

from picking up dirt prior to placement. When starting to

remove the backing ﬁlm from the adhesive, take care not to

separate the adhesive from the gasket tape.

ATTENTION

The adhesive performs best on a glass surface that is

clean and at a temperature comfortable to the touch.

Glass surface MUST be completely dry. If necessary,

gently warm ﬂange to remove any condensation.

Bend small increments of gasket tape to the required

ﬂange arc and apply the side with exposed adhesive to

the ﬂange, pressing out any gaps between the gasket

and ﬂange surface. Complete placement of the base layer

in sections of about 25 cm (1 ft.) at a time, ensuring that

each section is properly positioned and adhered to the

ﬂange before beginning installation of the next section of

gasket. Apply a base layer to the full circumference of the

ﬂange in this manner. On some smaller ﬂanges the gasket

may intermittently re-lift and exhibit “waviness” near the

ID of the gasket. This is acceptable and will be ﬂattened

later when the top ﬂange is placed and torqued. However,

smooth and complete gasket contact with the ﬂange

must be maintained along the OD part of the gasket as a

guide for proper gasket positioning, following the same

curvature as the ﬂange.

GORE

Gasket Tape

Series 1000

~10 degrees

End must not

have step