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Do not use flange gaskets. Before tightening flange bolts, carefully open the disc to the full open position to ensure proper alignment and clearance of the disc O.D. with the adja- cent pipe I.D. Leave disc in the full open position and tighten flange bolts per required specification. Once bolts aretightened, carefully rotate disc to closed position to ensure disc O.D. clearance.

INSTALLATION

Position the disc in the partiallyopen position, maintaining the disc within the body face-to- face. Place the body between the flanges and install flange bolts.

ASSEMBLY Disc in the Partially Open PositionDisc in the Full Open Position Disc in the Near Closed Position Bray

MAINTENANCE AND REPAIR

The many Bray features minimize wear and maintenance requirements. No routine lubrication is required. All components – stem, disc, seat, bushing, stem seal, etc., are field replaceable, no adjustment is needed. If components require replace- ment, remove the valve from the line by placing the disc near the closed position, spread the flanges, support the valve, then remove the flange bolts. No valve maintenance, including removal of manual or power actuators, should be performed until the piping system is completely depressurized.

DISASSEMBLY

Remove the handle, gear operator, or actuator from actuator mounting flange. Remove “Spirolox

®

” retaining ring.Remove stem with its thrust washer and two C-ring stem retainers. Remove bushing and seal. Remove the disc from the seat, protecting disc edge at all times. Push the seat into an oval shape, then remove the seat from the body.

ASSEMBLY

Push the valve seat into an oval and push it into the body with seat stem holes aligned to body stem holes. Push stem into the stem hole of body. For aid in inserting disc, slightly protrude stem beyond the I.D. of the top of the seat. Install a light coating of foodgrade silicone oil (for silicone free applications use soap and water) on the I.D. of seat. Insert the disc into the seat by lining up the disc hole with the stem hole of the seat. Note: the broached double “D” flats in the disc must be toward the bottom ofvalve body. (Take special care when lining disc up with stem.) With a down- ward pressure and rotating the stem back and forth, push the stem until the stem touches the bottom of the body stem hole. Make certain that when pushing the stem through disc bottom, the broached flats of stem and disc are aligned. After the stem has engaged the disc, but before the stemis firmly seated in the body, replace thestem seal and bushing. Install the two C-ring stem retainers in the groove in the stem and thrust washer on top of the C-rings. Seat the stem firmly in the body and install the “Spirolox

®

” retaining ringback into position.

DISTRIBUTOR All statements, technical information, and recom-mendations in this bulletin are for general use only. Consult Bray representatives or factory for the specific requirements and material selection for your intended application. The right to change or modify product design or product without prior notice is reserved.United States patent number 5,152,501.Other patents issued and applied for worldwide.
®

SERIES 30/31 Resilient Seated - 27103 CONTROLS

A Division of BRAY INTERNATIONAL, Inc.13333 Westland East Blvd. Houston, Texas 77041 281.894.5454 FAX 281.894.9499 www.bray.com© 200 6 Bray International. All rights reserved. B-1002 7 /0 6
® is a registered trademark of BRAY INTERNATIONAL, Inc.