Gate
Valve
Manual
Flat
Valve
4
1/16
Inch
Pressure
10000PSI
API
PSL3
Body
Material
Carbon
Steel
1.
Main
Purpose
and
Application
Plate
gate
valve
is
used
for
pass/stop
of
the
control
pipeline
and
the
other
mediums
which
rated
work
pressure
is
70
MPa,
full
bore
requires
103mm,
working
temperature
range
is
-29℃~+
121℃
,and
which
mediums
include
petroleum,
natural
gas
and
the
other
material
in
sour
environment
and
non-sour
environment
2.Technology
Specification
a.
Product
execution
standard:
API
SPEC
6A
specification
of
wellhead
and
X-mas
assy.
b.
Rated
work
pressure:
70MPa
(10000PSI)
c.
Nominal
bore:103mm
(4
1/16
in)
d.
Hydraulic
control
oil
pressure:
10.5
MPa
e.
Rated
temperature
level:
LU
f.
Material
level:
DD
g.
Product
specification
level:
PSL
3
h.
Performance
requirement
level:
PR1
3.Structure
Feature
3.1
The
valve
is
rising
stem
plate
gate
valve
made
up
of
valve
body,
valve
seat,
wave
spring,
valve
disk,
valve
stem,
valve
bonnet,
nut
of
stem,
packing
seals
etc.(see
attached
drawing)
3.2.
All
the
parts
(surface
is
humid
)
of
valve
are
made
of
alloy
steel
or
stainless
steel,
which
can
meet
the
status
requirements
designed
by
the
technical
specification.
3.3
The
valve-seat
is
a
float-seal
structure,
which
makes
the
valve
seat
joint
tightly
with
valve
plate,
there
is
full
of
seal-grease
in
the
valve
cavity
with
a
best
sealing.
The
sealing-faces
of
the
valve
plate
and
valve
seat
are
treated
with
welded
nickel
base
carbide
of
45~62HRC
skin
hardness,
which
have
high
hardness
anti-abrasive
and
anti-scour
to
increase
the
valve’s
working
life.
3.4
The
packing
filler
is
“mouth”
type
structure,
which
can
keep
effective
sealing
at
a
nominal
pressure
and
a
high
pressure
3.5.
After
valve
is
connected
with
hydraulic
control
pipeline,
the
position
of
oil-cylinder
is
pushed
to
move
up
and
down
by
contacting
fluid
pressure
so
valve-stem
has
synchronized
motion
with
valve
plate,
the
valve
can
open
or
close.
When
the
position
moves
up,
indicator
stem
moves
up
with
it,
the
valve
runs
to
open,
otherwise
the
valve
runs
to
close.
4.
Storage,
Transportation
and
Maintenance.
.
4.1.Valve
should
be
stored
in
dry
and
airy
room
and
shut
the
hole
to
make
the
valve
close.
4.2.
As
storing,
the
connected
end
should
paint
oil
for
antirust
and
anti-fouling.
4.3.
Before
delivery,
in
valve
cavity
is
full
of
high
pressure
sealing
grease;
After
usage,
till
many
times’
opening/closing
or
a
bit
leak
on
the
sealing
surface,
sealing
grease
should
be
injected
into
valve
cavity
by
sealing
grease
injecting
valve
of
valve
bonnet.
As
need,
unscrew
the
nuts
of
sealing-grease
injecting
valve,
and
connect
the
high-pressure
sealing
grease
injecting
gun
for
injecting
sealing
grease
into
valve
cavity,
then
screw
the
nut.
4.4
The
valve
is
used
to
open/close
medium
flowing.
In
the
course
of
usage,
valve
must
stay
at
“full
open”
or
“full
close”,
forbidden
to
used
for
flow
regulation,
otherwise
to
effect
valve’s
sealing
property
and
working
life.
5.
Pressure
Test
&
Installation
5.1.
Before
valve’s
delivery,103.5
MPa
hydraulic
pressure
tests
had
been
done
at
twice.
Do
forbid
repeated
test.
a..Procedure
of
the
test
pressure:
the
both
ends
have
test
thrice
separately,
standup
pressure
time
is
no
below
3
min
at
the
first
time,
standup
pressure
time
is
no
below
15min
at
the
second
&
third
time,There
must
be
no
leak
or
draw-down
during
standup
pressure.
5.3
As
valve
connecting
with
pipeline,
BX155
ring
sealing
gasket
may
be
set
at
the
end
of
valve,
and
connecting
a
pair
of
flange
with
bolts
and
nuts,
which
must
be
screw,
and
two
pieces
of
1″hydraulic
pipeline
of
hydraulic
control
table
will
be
safely
connected
with
the
top
hole
and
the
bottom
hole
in
the
side
of
the
hydro-cylinder,
so
the
valve
can
open/close.
6.
Repair
6.1.
There
is
a
bit
leak
between
a
couple
of
seals
of
valve
disk
and
valve
seat,
when
sealing
grease
will
be
injected
into
valve
cavity
by
sealing
grease
injecting
valve,
if
fail,
the
sealing-face
may
have
scratch
or
wear.
Renovation
will
be
done
under
face-off
and
ground
finish.
6.2.
As
leak
appearing
on
valve
stem
or
packing
filler
of
balance
stem,
the
filler
need
replace.
