Ruelco SC-1 User manual

‘SC-1’ SSCSV 3-WAY
INTERFACE VALVE
MODEL 8200
OPERATION MANUAL
MANUAL # OMP - 8200 - 01 - 09
(SEE SPEC. SHEET 8200)
I. PRINCIPLE OF OPERATION
The Ruelco ‘SC-1’ is a high pressure 3-
way, Normally Closed Interface Valve
operated by a low pressure control
signal. Pilot pressure opens the valve
and allows flow from inlet to outlet. A
loss of pilot pressure actuates the piston,
first blocking the inlet and venting the
outlet pressure. In the second stage of
closing, the shut-off piston then blocks
the vent port from the outlet port. The
high Cv factor of the Interface valve
assures a fast response to a loss of pilot
control pressure. The soft seat design
assures extended life and repeatability.
The SC-1 also comes in an Override
model which allows the operator to
manually open and close the valve
without the use of pilot pressure.
II. INSTALLATION
The ‘SC-1’ can be mounted either
vertically, horizontally, or supported by
piping from any of its ports. If it is
supported by piping, care should be
taken that the strength of the pipe fittings
used is adequate to prevent the fitting
from breaking off in the valve body
should the valve be inadvertently struck.
Proper pipe thread sealant should be
used on any pipe fittings threaded into
the valve ports. If stainless steel fittings
are used, a sealant that will prevent
galling is required.
Every Interface face valve has a panel
mount spacer designed into the cap to
aid in panel mounting. The rotating ring
design of the override model allows the
operator to construct the pilot pressure
line in any direction.
III. DISASSEMBLY (REFER TO
SPEC. SHEET 8200)
All Control and Pilot Pressure should
be vented before Disassembly
•Suitable adjustable wrench for
removing the cap.
•Pick to remove the Sleeve
from the body.
•Suitable adjustable wrench for
unthreading the bottom cap.
Note: All Item Numbers Refer to the
8200-10000 Model unless otherwise
Noted.
Spool Seals
1) To replace O-rings on the spool
assembly (Item 4), the cap must be
removed.
2) Unthread the cap (Item 2).
3) Pull the spool assembly (Item 4) out
of the Cap. Be careful not to lose the
spring.
4) The seals on the spool assembly may
now be replaced as per instructions
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given in the repair section of this
manual.
Body Seals
1) Unthread the Bottom Cap (Item 22)
and remove the ball (Item 18) and
the spring (Item 16).
2) Also remove the Bottom Sleeve
(Item 19) at this time.
3) Using the pick, insert the pick into
the Ball seal (Item 17), being careful
not to damage the inside edges and
pull the Shut Off Sleeve (Item 13)
out of the body. The pick will grab
into the holes in the center of the
sleeve. The Shut Off Piston (Item
14) and Shut Off Spring (Item 16)
will come out with the Sleeve.
4) Again using the pick remove the Top
Sleeve (Item 15), being careful not to
damage the Block Seal (Item 12).
5) Now, also using the pick, remove the
final Shaft Seal (Item 9).
IV. REPAIR AND ASSEMBLY
1) Remove the seals from the spool
assembly, Sleeve, and Bottom Cap.
2) Using an appropriate safety solvent,
clean all parts.
3) Inspect the shaft assembly for any
major damage such as burrs, knicks.
Also, inspect it for straightness.
Replace the shaft assembly if
damaged.
4) Examine the valve body for any
damage such as burrs, nicks, etc.
Replace if damaged.
5) Examine the Ball (Item 18), Ball
Seal (Item 17) and Block Seal (Item
12) and replace if damaged. The
seals can be removed with the pick.
Insert the new seal into the cavity.
Most of the seal should fall in easily.
Now place the sleeve in a vice and
slowly press the seal into the sleeve.
This will ensure a proper seal.
6) Replacement seals for a Ruelco
product repair kit are required for
proper valve performance. It is
recommended that all seals be
lubricated before and after
installation with a high quality
silicon based grease.
7) Lubricate the inside of the Body
(Item 6). Replace the Shaft Seal
(Item 9) making sure that the face
groove and lips can be seen and
point away from the cap.
8) Install the Sleeves into the body
making sure that the Seals are
orientated away from the Cap.
9) Place the ball inside the body and
resting, then place the Bottom sleeve
over the ball.
10) Finally, install the spring into the
bottom sleeve and screw the Bottom
Cap over the spring. This cap must
be tightened firmly.
V. DISASSEMBLY AND REPAIR
OF OVERRIDE CAP
Note: All Item Numbers refer to the
Override Model 8200-20000
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5) Replace all seals. Lubricate all seals
before and after installation.
1) Remove the Snap Ring (Item 6)
above the Air Ring (Item 9).
2) Slide the Air Ring off of the Cap
(Item 5).
3) With the cap off of the body, screw
the handle and override stem (Item
3) down into the cap until the bottom
of the handle is touching the top of
the cap. Then, loosen the Set screw
(Item 2) in the Handle (Item 1),
remove the handle from the override
stem and remove the override stem
from the cap.
4) Now, remove the air ring from the
cap by pulling upward.
6) Reassemble the Override Cap Assy.
and place back onto the Body.
VI. RECOMMENDED MAINTENANCE
PROCEDURE INTERVAL
Operate Manually. Every 30 days.
Disassemble, inspect and lubricate. Yearly or as required.
Replace all seals. Every two (2) years or as required.
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