Technical
Instructions
VGD
Series
Double
Valves
Document
Number
CC1N7631us
November
08,
2017
Page
4
Siemens
AG
Building
Technologies
Division
Ordering
information
Gas
valves
and
actuators
are
ordered
separately.
For
additional
SKPxx.xxxU
actuator
information,
see
the
following
technical
instructions:
SKP15.xxxU
155
‐
751P25
SKP25.xxxU
155
‐
752P25
SKP55.xxxU
155
‐
753P25
SKP75.xxxU
155
‐
754P25
NOTE:
The
SKPxx.xxxU
actuators
have
an
operating
temperature
range
of
14
°F
to
140
°F
(
‐
10
°C
to
60
°C)!
Table
2.
Product
numbers
Product
number
Size
Maximum
operating
pressure
psi
Close
‐
off
pressure
psi
Capacity
CFH
Natural
gas
at
P
=
1"
W.C.
Number
of
test
points,
1/4"
NPT
Valve
body
material
Inlet
Outlet
VGD20.253U
*)
1"
20
30
600
Two
¼
‐
inch
and
one
1
‐
inch
port
between
valves
Aluminum
VGD20.323U
*)
1¼"
20
30
1200
Aluminum
VGD20.403U*)
1½"
20
30
1,850
Aluminum
VGD20.503U*)
2"
20
30
2,300
Aluminum
VGD40.065U
2½"
NPT
10
75
3,880
1
1
Aluminum
VGD40.080U
3"
NPT
10
75
5,370
1
1
Aluminum
VGD40.100U
**
4"
flanged
10
30
9,680
1
1
Aluminum
VGD40.150U
**
6"
flanged
10
30
17,490
1
1
Aluminum
*)
VGD20.xxxU
double
valves
require
2
AGFxx.xxU
threaded
flanges
for
installation
**)
VGD40.1x0U
flanged
valves
must
be
installed
using
non
‐
metallic
flange
gaskets.
Gasket
material
must
be
chemically
compatible
with
the
fuel
gas
being
used
in
the
application
and
must
be
softer
than
the
aluminum
flange
sealing
surface.
Acceptable
gasket
materials
include
but
are
not
limited
to:
rubber,
paper,
and
plastic.
Observe
flange
bolt
torque
specifications
as
stated
in
the
VGD40
installation
instructions.
Also
refer
to
ANSI
/
ASME
B16.24.
