Honeywell VH2 Données Techniques page 18

VH2, VH3, VH4, VH5, VH6, VH7, VH8 ANSI 150 CLASS HIGH PERFORMANCE BUTTERFLY VALVES
INSTALLATION
Valve Design
• The VH Series High Performance Butterfly Valve
features a double offset (or, double eccentric) shaft
design to minimize seat abrasion and lower torque. This
double offset design allows the disc to lift off and "cam"
away from the seat as it rotates open.
• The VH series valve always rotates clockwise to close
(when viewed from above) and counterclockwise to
open.
• The valve body has an Overtravel Stop which prevents
the disc from over rotating into the wrong quadrant. This
stop is not to be used as a disc position stop; if the disc
contacts the Overtravel Stop, this means it has rotated
beyond the seat.
• The VH series valve must be installed with the seat in the
upstream position (SUS). Note the arrow on the metal
tag attached to the valve body.
Safety Precautions
• Be sure the line is depressurized and drained.
• Be sure of the pipeline media. Proper care should be
taken for protection against toxic and/or flammable
fluids.
• Never install the valve without an Operator (Manual or
Automatic) already attached to the valve shaft.
• Never remove the Operator from the valve while the
valve is in the pipeline under pressure.
• Always be sure that the disc is in the full-closed position
before installing the valve.
• Take care in handling the valve.
Flange Compatibility
The VH series valve is designed to fit between ANSI Class
150 flanges for valves 2" to 24" in size.
Gasket Compatibility
The VH series valve is designed to accommodate the use of
standard fiber gaskets (such as non-asbestos, flexible
graphite, asbestos or equivalent gasket materials) of 1/16"
or less, meeting the dimensional requirements of ANSI
B16.21-1978. Thick elastomeric gaskets are not
recommended. Metallic wound (Flexitallic) gaskets may
also be used.
Pipe Schedule Compatibility
The VH series valve is designed to allow the disc edge to
rotate into the open position without interference with the
pipeline I.D. in the following pipe schedules:
Table 10. Pipe Compatibility.
Size
2" - 12"
14" - 24"
31-00191EF—02
Pipe Schedule
SCH 80
SCH 40
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Product Identification
• Every VH series valve has a metal identification tag
attached to the valve body. Information includes the
Figure Number, the Size and Pressure Class, the
Materials of Construction, and the Operating Pressures
and Temperatures.
• Every VH series valve is hydrostatically tested before it is
shipped. The metal tag also includes a Serial Number;
this number, unique for each valve, is recorded by the
Honeywell Quality Control Department along with the
test results and material certification data, for individual
traceability and verification of every valve produced.
VH series valve tag
indicates proper flow
direction.
Fig. 10. Valve Identification.
Unpacking and Storage Instruction
1. Check the packing list against the valve received to
verify that the quantities, sizes and materials are cor-
rect.
2. Check to make sure that the valve and operator were
not damaged during shipment.
3. If the valve is to be stored before being installed, it
should be protected from harsh environmental con-
ditions.
4. Store the valve with the disc in the closed position to
protect the sealing edge and the seat.
5. Keep the valve in a clean location, away from dirt,
debris and corrosive materials.
6. Keep the valve in a dry area with the flange protectors
attached.
7. Keep the valve in a cool location if possible, out of
direct sunlight.
8. If not in use, exercise the butterfly valve (full open
and close) at least once a month.
Storage of Butterfly Valve
Assemblies
• Assemblies must be stored indoors, protected from the
elements.
• Materials received on job sites that have long
installation lead times should receive extra protection
from construction damage.
• Valve faces must be protected from abrasion, cutting
and nicking, as this will damage the face and may cause
flange area leaks.
• Electric actuators cannot be stored in wet, damp or
caustic areas.
• Do not store construction material on top of valve
assemblies.