Elkhart Brass 70133000 Electric Valves - Manual (Page 34)

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INSTALLATION BETWEEN PRE-EXISTING ANSI FLANGES
1. Spread the flanges to exceed the valves face-to-face dimension by 3/16” before placing the valve in
position to prevent distortion and/or damage to the sealing face of the seat. Remove protective covers
from valve prior to installation.
2. Open the valve (counterclockwise) so that the disc is at least 3/8” away from the body face. With the
flanges spread, center the body between the flanges and span the valve body with all flange bolts
possible.
3. Turn the disc to the fully open position and tighten the bolting hand tight. Slowly close the valve
clockwise to check for adequate disc clearance.
4. Return the disc to the fully open position and cross-tighten all bolting to the proper torque
specification.
5. Again, check for adequate disc clearance. If the installation is satisfactory, the valve is ready for
service and/or installing the valve actuator.
INSTALLATION IN NEW CONSTRUCTION USING ANSI WELDING TYPE FLANGES
1. With the disc in the nearly closed position (ten degrees or less), align and center the companion flange
bolt holes to the body scallops (if present) or body lugs.
2. Assemble the body and flanges with the flange bolting and make-up the bolting.
3. Use the flange-body-flange assembly for fit-up and centering to the pipe.
4. Tack weld the flanges to the pipe.
5. Remove the flange bolting and valve assembly from between the flanges.
CAUTION: Do not finish welding the flanges to the pipe with the valve bolted between the
flanges as this will result in serious heat damage to the valve seat.
6. Finish welding the flanges to the pipe and allow the flanges to cool completely before proceeding.
Remove and clean weld spatter from pip I.D.
7. Follow steps 2 through 5 of “INSTALLATION BETWEEN PRE-EXISTING ANSI FLANGES.”