BROEN BALLOMAX, Техническое руководство

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BALLOMAX
®
API 6D Certified Trunnion Mounted Ball Valves - Technical Manual
34
Rev 08/2019
7) It is important not to use this newly installed valve for a blowdown
valve or throttling valve. A sacrificial valve should be installed
downstream for blowing down your line.
b) Nitrogen Testing
We understand that Nitrogen Testing is a common construction
practice. This testing should be performed under careful practices that
include heating of the nitrogen to prevent the valves plasticized
components from freezing and damage.
This valve is for Natural Gas Service. We do not perform Nitrogen testing on our
valves. We test to API-6D standards. When testing with Nitrogen you must
respect that you are testing your welds, not the sealing ability of the soft seated
valve. The molecules of Nitrogen which is dry and very cold, is many times
smaller than that of Natural Gas which has natural lubricating properties. If your
Nitrogen is not preheated you can destroy the seats of the valve. Never test with
unheated Nitrogen with the valve in the partial open position and never where the
test media is lower than -40F.
Be sure to thoroughly drain and dry the valve after test.
Hot tapping
BALLOMAX
®
Standard Trunnion Mounted Weld X Flange Valves are Full Port
Open Valves and are suitable for Hot Tapping Operations. Always Tap through
the valve in the Fully open position. It is very important to remove all metal chips
from the Tapping Operation prior to Closing the Valve. This is a soft seated
valve and you will damage the seats with metal tapping chips.
With any Hot Tapping process, the valve must be in the OPEN position, and a
blow down point down stream used to remove tapping chips. These valves
cannot be throttled through and must not be used as a blow down valve. A
sacrificial valve down stream and of suitable size to allow for proper blow down
must be used.
We recommend you refer to the Tapping Equipment Manufacturers procedure for
the Tapping operation and procedure.
Cautions:
I. Always keep the valve in the fully open position to protect the
seating area.
II. Remove all metal chips from sealing area of valve prior to
operating the valve to prevent damage to Ball and Seats.