Honeywell SV2 Series User Manual page 66

SV2 Series Safety Shut-off Valves
Introduction and Flange Selection
Flanges are required to mount each valve and provide connection to standard NPT or BSP gas pipes. There are several available
flanges per valve body size. Flange kits designated as AB are for the 1 inch (DN25) valves while flange kits designated as CD
are for the 1 ½ and 2 inch (DN40 and DN50) valves. Each flange kit consists of 1 flange with sealing plug and 4 screws. Sealing
O-rings are shipped with each valve from the factory.
Table 13. Available Flange Kits.
Valve Sizes
B
1 inch
(DN25)
1.0 MMBTu
(300 kW)
at 4 in w.c. pressure drop
C / D
1 ½ and 2 inch
(DN40 and DN50)
2.6-4.6 MMBTu
(750-1348 kW)
at 4 in w.c. pressure drop
Mounting Valve to Flange(s) and Piping
When initially installing the valve, the installer must first determine the overall mounting orientation, then mount the flanges to
the main gas connection pipe and finally mount the valve to the flanges and piping.
NOTES:
• Flange Installation Instructions are packed with the flanges. Reference documents 32-00028 for
• The entire mounting and installation process is covered in detail in the valve installation
The process for mounting the 1 inch (DN25) valves/flanges differs from the process for mounting the 1 ½ and 2 inch (DN40 and
DN50) valves/flanges.
• 1 inch (DN25) valve bodies have drilled and tapped holes
– The flange pressure port must be installed facing sideways (refer to Figs. 2-3) due to the mounting
hole orientations.
– To prevent rotation, it is important to support the valve while installing it into the pipe train. The
screws may then be inserted into the flanges and tightened. The recommended tightening torque is
3.4 Nm (30 in-lbf).
• 1 ½, 2 inch (DN40/50) valve bodies have embedded slots for flange retaining nuts
– The flange pressure port must be installed facing either up or down (refer to Figs. 4-6) due to the mounting hold
orientations.
– The installer must first place 4 flange retaining nuts on one side only of the valve (front or back),
from inlet to outlet, such as side A/B only referenced in
flange, they must partially install the screws and retaining nuts onto the opposite side relative to
the nut placement in the previous step. The installer would then slide the valve into the pipe train,
ensuring that the partially installed retaining nuts on the flange slide into their respective slots
on the valve body. The valve must be supported as necessary to ensure that it does not rotate. The
installer would then tighten the partially installed flange screws per the recommended torque of
Thread Type
1 in (DN25) valve bodies and 32-00036 for 1 ½ and 2 in (DN40 and DN50) valve bodies.
instructions, 32-00018 (packed with each valve).
Size
Inches / DN
0.50 / DN15
0.75 / DN20
NPT
1.00 / DN25
1.25 / DN32
0.50 / DN15
0.75 / DN20
BSP
1.00 / DN25
1.25 / DN32
1.00 / DN25
1.25 / DN32
NPT
1.50 / DN40
2.00 / DN50
1.00 / DN25
1.25 / DN32
BSP
1.50 / DN40
2.00 / DN50
Fig. 16 or side C/D only. Then, on each
66
Flange Kit Valve Models
FLANGEABNPT050
FLANGEABNPT075
FLANGEABNPT100
FLANGEABNPT125
FLANGEABBSP050
FLANGEABBSP075
FLANGEABBSP100
FLANGEABBSP125
FLANGECDNPT100
FLANGECDNPT125
FLANGECDNPT150
FLANGECDNPT200
FLANGECDBSP100
FLANGECDBSP125
FLANGECDBSP150
FLANGECDBSP200
All
All
32-00029—02