D I S T R I B U T E D V A L V E S
03/2011 / IOM-NAV-BALL-S30
5
Installation, Operation and Maintenance Manual
Scope
The NAVCO
®
S30 3-piece ball valve is designed to satisfy a wide range of industrial and oilfield applications. It
has a swing out body, allowing the internals to be serviced while inline. The S30 comes standard with an
ISO 5211 mounting pad and stem, an adjustable, replaceable stem packing and is manufactured in carbon steel
and stainless trims. Sizes are available from ½” to 2” full bore, with threaded or socket weld end connections.
MOP is 2000psi for ½” through 1” and 1500psi 1-1/4” thru 2”.
Storage
After valves are assembled and tested, they are placed in the full open position, bores are greased and end
protectors are installed. These measures will provide adequate protection for approximately six months.
Extended indoor/outdoor storage requires periodic inspection and the addition of a corrosion inhibitor.
If long term storage is required, the valve should be conditioned by following Cameron procedure X-150771-01
and ensure adequate end connection covers are in place. Contact your Cameron representative for the
extended storage guidelines.
Valves should only be stored in the full open or full closed position to prevent seat distortion.
Installation
NAVCO S30 3-piece ball valves may be installed in any position with flow from either direction. However, for
best service life there is a preferred vertical or horizontal position, to maximize sealing and minimize the
accumulation of sediment.
In the vertical position it is preferred to have the upstream pressure from above so the weight of the ball will
assist the pressure in sealing. With the run of the valve in a horizontal position, it is preferred to have the stem
lying horizontal (i.e. toward the viewer), with pressure from the right. During operation, flow will act as a
siphon and minimize retention of sediment.
When handling or installing a valve, keep the valve in the full open position whenever possible to prevent
damage to the ball seal area. Threaded-end valves are installed using two wrenches, one on the flats of the
tailpiece adjacent to the pipe being installed, and the other on the adjacent pipe.
For socket weld end, to prevent ball and seat damage due to excessive heat or weld slag, the following
procedure is recommended for welding NAVCO
®
S30 valves into a line:
1.
Use solvent to clean grease or rust inhibitor from the ball and/or bore of the valve.
2.
Electric welding equipment is preferred for all installations. However, if only oxygen/acetylene welding
equipment is available, extreme caution should be taken regarding excess welding temperature.
3.
Weld with ball in the Full Open position.
4.
Make sure the temperature of body/seat area does not exceed 250F (Check with a Tempil stick).
