Marwin Valve 2000F150 Series Flanged Valves - Manual (Page 2)

Maintenance During Storage Period
Internal surface should be inspected to check for •
dust or other foreign objects.
Rust or dust must be removed by cleaning with •
proper solvent.
After cleaning, ball valves must be lubricated with •
an adequate lubricant.
Ball valves should be operated for at least two •
complete cycles before installing or returning to
storage.
Installation
The ball valves may be installed in any position using
standard pipe fitting practices.
Caution: Before installation of the valve:
Pipe must be free of tension both during and 1.
after installation.
Pipe must be flushed to clean dirt, welding 2.
residues, etc. which would damage ball or
seats.
The valve should be kept in OPEN POSITION 3.
during installation and protective plastic
covers must be removed only at the moment of
installation.
Before shipment, the ball is lubricated with a 4.
pure Vaseline oil. This can be easily removed
with an application compatible solvent if
required.
If the valve was specified to be tested per ANSI 5.
16.34, there may be some trapped water be-
tween the ball and the body cavity. This can be
removed by partially opening the valve, thereby
exposing the cavity to the through port of the
ball.
Special care should always be taken when 6.
installing automated ball valves that the ball is in
the proper position.
 Installation of Flanged Ends
Verify valve is in the full open position. 1.
Use the appropriate size bolt and heavy hex nut 2.
(not included) as recommended for flange size and
class.
Flange connection requires gasket (not included). 3.
Follow gasket manufacturer's recommended prac- 4.
tice for tightening flange bolts.
Manual Operation
Open and close the valve by turning the handle 1.
one-quarter turn (90°).
Valve is in open position when handle is in line with 2.
the pipe.
Valve is in closed position when the handle is per- 3.
pendicular to the pipe.
Maintenance
Before starting maintenance, please read information
contained in the Caution Section of the manual.
Open and close the ball valve at least once to re- 1.
lease the pressure completely from valve body.
Ball valves, if correctly used, normally do not need 2.
any internal lubrication and maintenance. However,
when necessary, ball or seats can be replaced by
qualified personnel following the instructions of this
manual.
For further information, please refer to 3. SPARE
PARTS LIST .
Valve Disassembly
Note: Parts and disassembly / reassembly instructions
are typical for this type of valve. Actual parts and dis-
assembly / reassembly procedures may vary slightly,
depending upon size of valve, especially in handle and
stem seal areas.
A. To inspect and/or Replace Body Seals, Seats,
Packing & Ball
Reference cross section for part identification
Warning: cycle valve at least once in depressurized
line before disassembly.
Valve must be in the open position. 1.
Remove valve from line. 2.
Remove bolts (7) securing end cap and separate 3.
end cap (2) from body (1).
Close the valve and remove ball (3), seats (5), and 4.
body seal (6). Be careful not to damage ball.
B. Packing, Stem, Handle
Sizes 1/2" through 1": 1.
a. Remove handle nut (25), lock washer (24), handle
(23), packing nut (20), lock saddle (19), Belleville
spring washers (16), and packing follower (15).
Sizes 1-1/2" through 6": 2.
a. Remove handle / handle adaptor (23) / (22), lock
saddle (19), packing nut (20), stop plates (18), Bel-
leville spring washers (16), and packing follower
(15).
Push the stem (4) into body (1). Remove thrust 3.
washer (12) and bearing washer (11) from stem.
Remove bearing washer (11) from the top of the 4.
packing, and packing set (13).
Note: A spare parts list is available for this valve.
Please refer to explosion view below for identification.
Please specify specific valve number to ensure proper
parts are ordered. Marwin Valve does not take respon-
sibility for incorrectly ordered spare parts.
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