Ruelco 7500 User manual

RELIEF VALVE
MODEL 7500
OPERATION MANUAL
MANUAL # OMP- 7500 12/09
(SEE SPEC. SHEET 7500)
I. PRINCIPAL OF OPERATION
The Ruelco “Model 7500” Relief
valve is an all stainless steel, soft
seat valve, capable of operating
pressures from 50 to 10,000 psi.
The small size of the Relief valve
makes it ideal for designs in which
space is limited. The soft seat
design ensures long life and
repeatability even in corrosive
systems.
II. INSTALLATION
The “Model 7500” Relief Valve
should be installed within a system
where the highest pressure will be
seen, but before any critical
components. This will ensure over
protection from high pressure
fluctuations.
The inlet should be connected to the
bottom of the Relief Valve and the
vent port should be connected to the
side port.
Note:
The vent port should be free flow
and not experience any back
pressure.
III. DISASSEMBLY (REFER TO
SPEC. SHEET 6001)
Tools required are as follows:
•7/8” Wrench
•3/8” Wrench
•Adjustable Wench
1) Place the 3/8” Wrench on the
Spring Cap(Item 1) and
completely loosen from
Spring Housing (Item 3).
2) The Spring (Item 4) and the
Spring Plate (Item 5) can
now be removed.
3) Using the Adjustable wrench
to hold the Body (Item 7),
use the 7/8” wrench to
loosen the Spring Housing
from the Body.
4) The Piston (Item 12), Outer
Sleeve (Item 10), and Seal
Guide (Item 8) can now be
removed.
IV. REPAIR AND ASSEMBLY
1) Using an appropriate safety
solvent like Varsol, clean all
parts.
2) Visually inspect all parts for
burrs, nicks, dings, etc.
3) Place the Seal Guide into the
Body facing the correct
direction, with the small OD
upward.
4) Gently place the Head Seal
(Item 9) into the Body and
into the groove created by
the Seal Guide.
5) Drop the Outer Sleeve into
the body.
6) Lubricate body Piston Seal
(Item 11) and install on
Spring Housing (Item 3).

7) Insert the Piston (Item 12)
into the Spring Housing.
8) Lubricate and install the
Body Seal (Item 6) onto the
Spring Housing.
9) Gently thread the Spring
Housing into the Body until
flush. This will require the
use of both wrenches.
10) Finally, place the Spring
plate, then Spring, then
Thread the Spring Cap into
the Housing.
V. RECOMMENDED MAINTENANCE
PROCEDUREand INTERVAL
Operate Manually - Every 30 days.
Disassemble and inspect - Yearly or
as required.
Replace seals - Every two (2) years
or as required.