Bray RF15 & RF30 User Manual

Page 3

Installation and Maintenance Manual

Series RF15-RF30 Ball Valves

Date: August 2011 / Page 3 of 5

A Subsidiary of BRAY INTERNATIONAL, Inc.

FLOW-TEK, Inc.

Tel: 832.912.2300

8323 N. Eldridge Pkwy #100

Fax: 832.912.2301

Houston, Texas 77041

www.flow-tek.com

7. Cycle the valve slowly, with a gentle back and

forth motion, to build gradually to the full quarter

turn. By cycling slowly, the seat lips will assure

a permanent seal shape against the ball. A fast

turning motion, at this point, may cut the seats

before they have a chance to form the proper seal.

8. If a tester is available, pressure test valve prior to

reinstallation.

9. TEST AS FOLLOWS:

Test valve, if possible, prior to placing valve back into

line position. WARNING: If not properly secured, the

valve can separate from the pressure source, resulting

in possible injury. Always join the valve to companion

flanges of same pressure rating as valve and secure

with a full set of flange bolts.

1. Secure valve to a test future by means of a mating

flange with full bolting and a suitable gasket.

Orient valve so seat to be tested is facing up.

2. Introduce 50 to 100 psig air. Partially cycle the

valve, under pressure, and then slowly close to

make sure the cavity is pressurized (use hearing

protection). Pour water into the upper port to

cover the ball and visually check for bubbles. If

bubbles appear, pour the water out, cycle the

valve several times and recheck. To check for

leakage in the other port, reverse the valve and

introduce air pressure to the port just checked.

3. Check the stem seal at this time by coating the

gland area with a soapy water solution. If leakage

occurs, tighten stem seal just until leakage stops.

øB

N x øT

øS

øF

N x øT

øB

øF

øS

3”–12” Valves

1” – 2” Valves

Dimensions may be found in product literature