Ashcroft 80-81 - Isolation Rings Manual de usuario descargar pdf (Pagina 8)

Type 81 Bolt-Thru

(Installed View)

Prior to installation, please follow the recommended manufacturer procedure:

A. Confirm process has been shut down with process pressure relieved and piping drained.

B. Provide pipe flange gasketing, mounting bolts, lockwashers and nuts (not supplied by Ashcroft).

Step 1: Isolation ring and flange gaskets should be centered between process piping flanges.

For Type 80 Wafer: Assembly is installed by placing centering gages (shims) on the two bottom-most flange

bolts; these are supplied by Ashcroft with each isolation ring assembly. Refer to the following table for cen-

tering gage size based on flange class rating. Note: Centering gauges may be removed afterwards by

breaking.

Step 2: Position Type 80 Wafer isolation ring with centering-gages or Type 81 Bolt-Thru using two bottom-

most bolts through unit and process flanges. Take care to ensure that any attached instruments are directed

in a vertical (upward) configuration, while measuring devices (e.g. gauge, switch, transducer) are also posi-

tioned between the two upper-most flange bolts to prevent obstruction with the process piping.

ANSI/ASME

NPS

CENTERING

CLASS RATING GAGE SIZE

Class 150 All Sizes 1/8˝

2˝ 1/4˝

3˝ 3/8˝

4˝ 1/4˝

6˝ 11/16˝

8˝ 11/16˝

Class 300 10˝ 9/16˝

12˝ 3/8˝

14˝ 13/16˝

16˝ 5/8˝

18˝ 1-1/16˝

20˝ 1-1/16˝

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Ashcroft 80-81 - Isolation Rings Manual de usuario Pagina 8