AirSep AS-E - Page 137

AS-D+—AS-P Series Instruction Manual 137
AirSep Corporation
For Series 4000 with NPT threads, to insure a leak tight joint,
liberal use of a compatible pipe joint compound is necessary.
WARNING:
ANY COMPOUND OR LUBRICANT USED ON THREADS SHALL BE
SUITABLE FOR THE SERVICE CONDITIONS AND SHALL NOT REACT
UNFAVORABLY WITH EITHER THE SERVICE FLUID OR THE PIPING
MATERIAL.
Flow through the Jamesbury Series 4000 valve can be in
either direction.
Use standard piping practices when installing the valves
with threaded connections. When tightening the valve to
the pipe, apply the wrench to the end nearest the pipe
being worked.
3.2 Handles
If the Series 4000 valve handle (17) must be removed for
any reason, the handles must be remounted with the han-
dle stop tang as shown in Figure 4.
WARNING:
FAILURE TO PROPERLY MOUNT THE HANDLE MAY RESULT IN
IMPROPER VALVE OPERATION, DAMAGE OR PERSONAL INJURY.
3.3 Commissioning
Ensure that there is no dirt or foreign objects left inside the
valve or pipeline. Flush the pipeline carefully. Make sure
that the valve is fully open when ushing.
WARNING:
GOOD PIPING PRACTICE DICTATES THAT ONCE INSTALLED, BUT
PRIOR TO FIRST USE, THE VALVE IS LEAK TESTED IN PLACE TO
ASSURE LEAKTIGHTNESS HAS NOT BEEN COMPROMISED BY
THE INSTALLATION PROCESS. INSTALLATION ACTIONS THAT CAN
CAUSE LEAKAGE INCLUDE, BUT ARE NOT LIMITED TO, WRENCHING,
SOLDERING, WELDING AND/OR HOISTING. PIPELINE MISALIGNMENTS
AND/OR LACK OF SUFFICIENT SUPPORT CAN ALSO PLACE UNDUE
STRESS ON THE VALVE, POSSIBLY RESULTING IN LEAKAGE.
4. MAINTENANCE
4.1 General
Although Metso’s Jamesbury valves are designed to work
under severe conditions, proper preventative maintenance
can signicantly help to prevent unplanned downtime and
in real terms reduce the total cost of ownership. Metso
recommends inspecting valves at least every ve (5) years.
The inspection and maintenance frequency depends on the
actual application and process condition. Routine mainte-
nance consists of tightening the lower stem nut (16) 1/4
turn periodically to compensate for wear caused by the
stem turning against the seal. Loosen the upper stem nut
(16) on top of the handle (17) before tightening the lower
stem nut. Retighten the upper stem nut after tightening the
lower stem nut. (See Figure 4)
4.2 Disassembly
NOTE: If complete disassembly becomes necessary,
replacement of all seats and seals is recommended. Refer
to (Table 3).
The Series 4000 ball valve is designed to be serviced in or
out of the line. The following instructions are for in-line
disassembly. (For bench disassembly, which may be more-
convenient, follow a similar sequence).
1. Comply fully with the instructions in all the WARNING
Sections.
2. Be sure to cycle the valve. Leave in the open position.
The body center section will not swing out in the closed
position.
3. Remove the top stem nut (16), Shakeproof Washer (19)
and handle (17).
4. Loosen all four body bolts/tie rods (52). Remove three
from the valve. Leave the remaining bolt in place with
the nut backed o at least 1/4” (6mm)
5. For positive alignment and ease of in-line assembly,
each end cap is interlocked approximately 1/16” (1.6
mm) into the body as shown in (Figure 3). To overcome
this feature during in-line disassembly it is necessary
to separate each cap at least 1/16” (1.6 mm) from the
body. Sharply rap body and caps with a block of wood
or plastic mallet to break loose body seal. Spread end
caps and swing the body out of the line. If pipe does
not allow simple spreading, remove the remaining
body bolt and rotate center section per (Figure 1). This
will improve access to the end cap ange for ease of
spreading. Swing the valve body (1) out from between
the end caps (2). Be careful not to damage the sealing
surfaces “A” (see Figure 3) at each end of the valve.
Figure 1
Figure 2A
Figure 2B
IMO 3/18
4 IMO-202 EN