KEYSTONE FIGURE 85/86 CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Please read these instructions carefully
1.3 HANDLING
1.3.1 Packed valves
Lifting and handling of the packed valves in
crates should be carried out by appropriate
lifting equipment. If a fork lift truck is used,
appropriate fork hitches are required. The
lifting and handling of packed valves in cases
will be carried out in the lifting points. The
transportation of all packed material should be
carried out safely and according the local safety
regulations.
1.3.2 Unpacked valves
The lifting and the handling of these valves has
to be carried out by using appropriate means
and by respecting the carrying limits. The
handling must, preferably, be carried out on
pallets, protecting the machined surfaces and
Hazard potentials:
• disregarding of instructions
• improper use of product
• insufficiently qualified personnel
Valve application to be within the pressure
temperature limits indicated in the
P/Tdiagram.
Essential points and functions of the valve
should be inspected on a regular basis.
seat to avoid damage.
When lifting the large dimension valves, the
sling and the hooking of the load must be
carried out by using the appropriate tools
(brackets, hook, fasteners) and load balancing
tools in order to prevent the valves from falling
or moving during the lifting and handling.
The valve may be lifted only by slings attached
to the flange holes or valve body; never to valve
opening.
1 STORAGE AND HANDLING
1.1 PROTECTION
Keystone valves are delivered with protection
in accordance with the Keystone Engineering
Instructions, to protect the valve seats and disc
from damage. Wrapping and/or covers should
be left in place until immediately before fitting
to the pipe.
1.2 STORAGE
When valves are to be stored for some time
before being fitted, storage should be in the
original delivery crates or cases. Storage
should be off the ground in a clean, dry
indoorarea.
© 2017 Emerson. All Rights Reserved.Emerson.com/FinalControl VCIOM-00751-EN 15/05
KEYSTONE FIGURE 85/86 CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
2 INSTALLATION
WARNING
For safety reasons, it is important to take the
following precautions before you start work on
the valve:
1. Personnel making any adjustments to the
valves should utilize suitable equipment. All
required personal protection means should
beworn.
2. The line must be depressurized before
installing the valve.
3. Personnel trained in all aspects of manual and
mechanical handling techniques must carry
out handling of the valves.
4. Misuse of the valve is not allowed.
Forexample: the valve, handles, actuators
or other parts may not be used as
“climbingtools”.
5. Ensure that valve pressure/temperature
limitations marked on the identification tag
are within the service conditions. The trim
number on the valve’s tagplate identifies
the valve materials. See Product Manual for
valve specific P/T diagram and trim number
definition.
6. Ensure that valve materials are compatible
withthe pipeline fluid.
2.1 VALVE INSPECTION
1. Carefully remove the valve from the
shipping package (box or pallet) avoiding any
damage to the valve or instrumentation.
2. Confirm that the materials of construction
listed on the valve nameplate are
appropriate for the service intended and are
as specified.
3. It is not allowed to use third party spare
parts. In case of third party spare parts, safe
operation is not guaranteed.
2.2 FLANGE AND PIPE COMPATIBILITY
Check matching of flange drilling pattern of
pipe and valve body outside diameter before
assembly.
Flange face which contacts valve body has to be
flat and without any scratches or other damage.
The figure 85 is a check valve of a swing-type
concept. The geometry is chosen in such
a way that the pipeline is being used as
disc travel stop. Valves should be installed
between flanges in a straight pipeline
according ISO4200 of the same nominal size
as the valve. The pipe schedule determines
the disc openings angle. Do never install a
figure85 swing-type check valve just upfront a
compensator, an expander pipe-coupling or an
elbow fitting. The disc shaft connection might
be damaged due to the lack of a well defined
travel-stop function to the pipe.
Gaskets are not required.
The figure 86 is a check valve of a swing-type
concept. The valve body of figure 86 is equipped
with an internal travel stop which stops the disc
in full open position. The disc is not allowed to
touch the pipeline inside.
The minimum flange face inside diameter
(Dmin.) for figure 86 is equal to the valve
Q-dimension + adequate disc clearance.
Gaskets are required.
FIGURE 85
D min/max
FIGURE 86
Q
D min/max
2
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