Page 35 - GRINNELL Mechanical Grooved Piping Products EMEA

Flange Adapters
Flange Adapter Technical Data
Fig 71 GRINNELL Flange Notes:
A. Fig 71 Flange Adapters have an anti-rotational feature or “Gripping Teeth” cast inside the shoulder.
B. GRINNELL grooved Flanges are to be assembled on butterfly valves so as not to interfere with actuator,
or handle operation.
The Flange might not fit all Grooved butterfly valve sizes. Contact a GRINNELL Sales Representative for details
C. Figure 71 Flange Adapters are not recommended for application which incorporate tierods for anchoring or on a standard fitting within 90° of each other. Contact a GRINNELL Sales Representative for recommendations prior to using with plastic pipe.
D. Fig 71 GRINNELL Flange sealing gaskets require a hard flat surface for adequate sealing. The use of a metal adaptor insert is required for applications against rubber faced valves or other equipment. The adaptor insert is installed between the GRINNELL Flange sealing gasket and the mating flange or surface to provide an effective sealing surface area.
Metal Flange Washer Adapters are required when Figure 71 Flange Adapter is used against surfaces such as:
GRINNELL Fig. 71
Mating Flange Component
Grooved
Pipe Flange Adapter Washer
Exhibit A
GRINNELL Fig. 71
Rubber Surface
Mating Flange Component
1. Rubber Surfaces (see exhibit A)
2. Adapting AWWA Cast Flanges
3. Rubber Faced Wafer Valves
4. Serrated Flange Surfaces (see exhibit B)
Special attention required during installation to ensure that the gasket is installed correctly with the small side on the inside.
See the picture on the left side.
Grooved
Pipe Flange Adapter Washer
Full Face Gasket
Exhibit B
35