Masoneilan 39003 Series, Инструкция по эксплуатации

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Instructions EM39003 - 05/10
39003 Series High Performance butterfly Valves
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2.3 Disc Clearances
Prior to installing the valve, it is important to make sure the ID of
the pipe and pipe flanges is large enough to allow the disc edge
to swing into the opening without interference. Damage to the
disc edge can severely affect the performance of the valve. Pipe
schedule compatibility for Masoneilan valves is shown in Section
1.5 of this manual.
2.4 Opening Rotation
The Masoneilan valve is designed to open with counterclockwise
rotation of the shaft, and to close with clockwise rotation of the
shaft when viewed from above with the shaft in the vertical
position. An overtravel stop is provided in the body to prevent
overtravel of the disc in the wrong direction. This stop is not to
be used as a disc position stop. Contact with this stop means
the disc has travelled past the seat.
2.5 Installation Position
To prevent damage during installation, the valve disc must be
fully closed before installing the valve in the line. It is preferable
to install HPbVs with the shaft horizontal. This is important for
valves applied to fluids which contain particulates. For HPbVs
16" and larger, installation should always be made with the shaft
in the horizontal position.
2.6 Valve and Flange Preparation
If the valve and mating pipe are properly prepared
for installation, future problems can be avoided. All valve and
pipe flange faces should be free of dirt, grit, indentations, or
surface irregularities which may disrupt flange sealing and cause
external leakage. The valve seat and disc sealing surface should
also be inspected to eliminate any dirt or foreign material that will
adversely affect the operation of the valve.
2.7 Installation Tools
The only tool required in the installation of a Masoneilan HPbV
is a wrench suitable for tightening the flange bolts and/or nuts
required to secure the valve in-line. A hoist may be required
for handling valves 10" and larger. Smaller sized valves can
usually be installed by hand. Temporary pipe supports may be
used to keep mating flange faces parallel in order to aid in valve
installation.
2.8 Required Bolting
The tables outlined on the following pages are furnished to
provide information regarding the size, type, and quantity
of bolting recommended for the installation of Masoneilan
HPbVs. These tables are intended for use as a planning and
procurement guide. All recommendations are based on pipe
flanges in accordance with AnSI b16.5 for 2" through 24" valves
and AnSI b16.47 Class A for valves 30" and larger. Flange
bolting is not included with the valve shipment.
2.9 Unpacking and Storage Instructions
1. Check the packing list against the valve received to verify
that the size, material, and trim are correct.
2. Check to make sure that the valve and operator were not
damaged during shipment.
3. When lifting the valve, take care to avoid damage to the
flange faces, disc sealing edge, or operator. On larger
valves, lifting holes are provided on the periphery of the
valve body to aid in valve handling.
4.
If the valve is to be stored before being installed, it should
be protected from harsh environmental conditions.
5.
Store the valve with the disc in the closed position to
protect the sealing edge and the seat.
6. keep the valve in a clean location, away from dirt, debris
and corrosive materials.
7. keep the valve in a dry area with the flange protectors
attached and on a suitable skid or pallet.
8. keep the valve in a cool location if possible, out of direct
sunlight.
2.10 Pre-Installation Procedure
1. Remove the protective flange covers from the valve.
2.
Inspect the valve to be certain the waterway is free from
dirt and foreign matter. be certain the adjoining pipeline is
free from any foreign material such as rust and pipe scale or
welding slag that could damage the seat and disc sealing
surfaces.
3. Actuators should be mounted on the valve prior to
installation to facilitate proper alignment of the disc in the
valve seat.
4. The valve should be in the closed position . Make sure
the open and closed positions of the actuator correspond
to the counterclockwise to open direction of rotation of the
valve.
5.
Cycle the valve to the fully open position, then back to
the fully closed position, checking the actuator travel stop
settings for proper disc alignment.
6. Check the valve identification tag for valve class, materials,
and operating pressure to be sure they are correct for the
application.
Personal injury or property damage may result if the valve
is installed where service conditions could exceed the valve
ratings.
7. Check the flange bolts or studs for proper size, threading
and length.
2.11 Valve Installation Procedure
The Masoneilan 39003 Series High Performance butterfly Valve
can be installed in the pipeline with the shaft in the vertical,
horizontal, or other intermediate position. based on applications
experience, however, in media with concentrations of solid or
abrasive particles or media subject to solidification buildup,
valve performance and service life will be enhanced by mounting
the valve with the shaft in the horizontal position.
All Masoneilan valves are bi-directional and can be mounted in
the pipeline in either flow direction; however, the preferred flow
direction for all seat styles and materials is with the seat retainer
ring located upstream to provide maximum seat protection.