A
RUVG
MANUAL
26 of 35
June 14
SAFETY
SHUTOFF
VALVE
LEAK
TEST:
Safety
shutoff
valves
require
a
qualified
technician
to
perform
a
leak
(bubble)
test
to
determine
tightness
of
closure
on
a
least
an
annual
basis.
A
very
small
amount
of
leakage
is
normal.
Valve
leakage
rates
exceeding
those
noted
in
the
table
below
require
repair
or
valve
replacement.
For
more
detailed
valve
leak
test
instructions,
refer
to
the
valve
manufacturer’s
instructions.
1.
De
‐
energize
the
control
system.
2.
Close
the
upstream
manual
gas
valve.
3.
Connect
a
¼”
(6mm)
tube
to
the
outlet
pressure
tap
on
the
safety
shutoff
valve.
4.
Immerse
the
opposite
end
of
the
¼”
(6mm)
tube
(cut
to
a
45°
angle)
vertically
½”
(13mm)
into
a
clear
container
of
water.
5.
Count
the
number
of
bubbles
appearing
during
a
10
second
period.
6.
If
the
bubble
rate
is
greater
than
that
noted
in
the
table
repair
or
replace
the
valve.
7.
If
bubble
rate
is
less
than
noted
in
the
table,
remove
the
¼”
(6mm)
tube,
reconnect
the
outlet
pressure
tap
plug.
8.
Energize
the
control
system
and
open
upstream
manual
gas
valve.
9.
After
testing
check
all
piping
connections
and
plugs
for
external
leakage.
The
maximum
leakage
rate
(bubbles/10sec.)
is
6.
GAS
MANIFOLD
It
is
recommended
that
at
least
once
each
year
the
safety
devices
should
be
checked.
Follow
operational
check
at
detailed
in
this
manual.
The
Safety
Shut
Off
Valves
must
be
tested
on
at
least
an
annual
basis
or
as
per
the
manufacturer’s
recommendations
which
ever
is
less.
Regulators
with
vent
terminals
must
have
yearly
cleaning
of
the
screen.
1/2 (13mm)
CUT AT
45 DEGREE
ANGLE
JAR OR GLASS WITH WATER
1/4 IN (6MM) ALUMINUM OR
COPPER PILOT TUBING
1/4 (6MM) FLEXIBLE TUBING
GAS SUPPLY
UPSTREAM
MANUAL
GAS COCK
PVR
SSOV
MANUAL
GAS COCK
DOWNSTREAM
TEST
TAP
LEAK
A
B
C
E
D
1
CAN ALSO BE A PERMANENT PETCOCK.
PRV = PRESSURE REGULATING VALVE.
2
USE ONLY ONE OF THE DOWNSTREAM TAPS ON THE SSOV.
SSOV = SAFETY SHUTOFF VALVE.
4
3
2
3
4
DOWNSTREAM
GAS COCK
MANUAL
1
F
