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c,
Apply
loctite
retaining compound) or equivalent to Spring
Retainer thread.
d,
Carefully screw in Spring Retainer (16)
ensuring that Spring (13) enters the bore of
the Spring Retainer (16).
e,
Loosen locknut (10) and unscrew bolt or
setscrew from Valve assembly.
2.
Fit Locknut (10) to Adjusting Screw (8) and
partially screw Adjusting Screw (8) into Valve
Cover (2). For Gasket sealed versions, screw
Adjusting Screw (8) in to Valve Cover(2) far
enough to allow engagement with Spring Cap 4)
during assembly.
3.
Fit Valve (3) into Housing (1), ensuring freedom
of movement.
4.
Fit Spring (5) on to top of Valve (3).
5.
Fit 'O'Ring (7) or Gasket (17) to Valve Cover (2).
6.
'O'RING
SEALED
'O'Ring (6) to Spring Cap (4) and fit Spring Cap
(4) onto Valve Cover (2).
Cat #
Description
1
Housing
2
Valve Cover
3
Valve
4
Spring Cap
5
Spring
6*
'O'Ring
7*
'O'Ring
8
Adjusting Screw
* Items marked with asterisk are not common to all builds of RV26 valves.
Please ensure that parts are identified correctly before ordering.
620
(High
temperature
VERSIONS
ONLY:
Fit
SECTION 5 - PARTS DESIGNATION
Qty
1
1
1
1
1
1
1
1
7.
GASKET SEALED VERSIONS ONLY:
Place Spring Cap (4) on Spring(5).
8.
With a new 'O'ring or gasket in place, fit Valve
Cover (2).
4.6 SETTING
NOTE: Final pressure setting is carried out after
the valve is installed or reassembled 'in line'.
Refer to Section 6 for notes on Bypass Valve
setting and operation.
1.
For increased bypass pressure, rotate Adjusting
Screw (8) in clockwise direction (i.e. screw in).
DO NOT exceed system design pressure.
2.
For decreased bypass pressure, rotate Adjusting
Screw (8) anti-clockwise (i.e. screw out).
3.
Lock Adjusting Screw Locknut (10) against
Housing immediately after any adjustment is
made.
4.
For Gasket sealed versions, replace Adjusting
Screw Cap with a new Gasket after setting is
completed.
Cat #
Description
9
Setscrew
10
Locknut
12*
Ball
13*
Spring - Vent
16*
Spring Retainer
17*
Gasket
18
Adjusting Screw Cap
19*
Gasket
4
Qty
8
1
1
1
1
1
1
1
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