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keystone Swing CheCk VAlVe
Figures 809 to 815 installation and maintenance instructions
Before installation these instructions must be carefully read and understood
The Figure 809 to 815 valves are simple to
maintain and operate. no special tools are
required for any of the procedures described
below.
spare Parts
The recommended spare parts for the Figure
809 to 815 are:
1. Spring
2. Seat O-ring, if applicable
storage Requirements
For best results store the valve on a pallet in a
clean dry warehouse. if a clean, dry warehouse
is not available, always do the following:
1. keep the valve off the ground and high
enough to avoid standing water.
2. Cover the valve with a water repellant cover
(not supplied by (emerson) and keep protected.
Installation Guidelines
insert the valve between two flanges with
gaskets. install the Figure 809 between ASMe
300 flanges or standard 250 cast iron flanges.
install the Figure 810 between ASMe 150
flanges or standard 125 cast iron flanges. See
Figure 1 for correct installation positions.
CautIon
1. Never use the valve with reciprocating
compressors or in other pulsating services.
2. Position the valve to promote smooth flow.
3. Allow clearance for disc movement.
PRoCeduRes
operation Procedure
The Figure 809 to 815 valves are fully automatic
in operation as received. no special procedures
are required for shutdown. Valves are ready for
operation as received. Do not adjust.
CautIon
1. Do not attempt to open the valve against
pressure or static head. Personal injury as
well as damage to the valve will occur.
2. Keep media free of air bubbles, as they
may cause damage to the valve. Air trapped
downstream of the valve may cause
uncontrollable slamming and water hammer
on pump shutdown.
Emerson.com/FinalControl
FiguRe 1.
installation positions, elevation view
CoRReCt PosItIon
note hinge
position
normal flow
note hinge
position
© 2017 Emerson. All rights reserved.
InCoRReCt PosItIon
normal flow
normal flow
normal flow
VCIoM-03382-us 15/06
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Summary of Contents for Emerson Keystone
- Page 1 2. Cover the valve with a water repellant cover note hinge position (not supplied by (emerson) and keep protected. Installation Guidelines insert the valve between two flanges with gaskets. install the Figure 809 between ASMe 300 flanges or standard 250 cast iron flanges.
- Page 2 1. The disc may bounce due to column separation Add a vacuum breaker. upstream of the valve Valve leaking 1. Check for foreign material caught in the seat. Remove the material from the seat area. 2. Damaged seat seal. Replace seat seal. © 2017 Emerson. All rights reserved.
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