Installation & Operating
Instructions
For
Dixon Bayco
2" Swing Check Valves
For Sales and Service Contact
USA:
Canada:
Dixon Bayco USA
Chestertown, Maryland
Phone: 410-778-2000
Fax: 410-778-4702
Toll Free: 800-355-1991
E-mail: [email protected]
Dixon Group Canada Limited
Innisfil (Barrie), Ontario
Phone: 705-436-1125
Fax: 705-436-6251
Toll Free: 877-963-4966
E-mail: [email protected]
Europe:
Asia Pacific:
Dixon Group Europe Ltd
Preston, England
Phone: +44 (0)1772 323529
Fax: +44 (0)1772 314664
E-mail: [email protected]
Dixon (Asia Pacific) Pty Ltd Wingfield,
South Australia
Phone: +61 8 8202 6000
Fax: +61 8 8202 6099
E-mail: [email protected]
Mexico:
Dixva, S. de R.L. de C.V.
Monterrey, N.L
Phone: 01-800-00-DIXON (34966)
Fax: 01-81-8354-8197
E-mail: [email protected]
dixonvalve.com
2" Swing Check Valves
To properly operate and maintain your Dixon Bayco swing check
valve the following instructions are provided. Please read with care
as improper handling or maintenance may cause a hazardous
condition.
Do not modify your Dixon Bayco swing check valve for any
reason. It can result in a hazardous condition due to operating
difficulties or operation malfunction. Disassembly or tampering
will void the product warranty.
Immediately remove from service any swing check valve that is not
performing satisfactorily.
Installation
Dixon Bayco swing check valves are properly adjusted and ready to
use upon leaving the factory.
1. Ensure arrow is pointing downstream of product flow when
installing.
2. Threaded models require anti-seize compound to prevent galling.
3. Apply appropriate gasket for square flanged model.
For Flanged Models:
Restricted space behind the two top inlet mounting holes does not
permit standard anti-vibration nuts to be applied. Two ½"-13 Jam
nuts are provided for use with ½" – 13 bolts for these two locations.
Use appropriate length ½" bolts and nuts for other locations.
Care and Handling
Dixon Bayco swing check valves are tested at the factory and are in
proper working condition when shipped. Swing check valves are
designed to be tough and to provide long service with reasonable
care and handling.
Food Grade Materials
Dixon Bayco 3020 series of swing check valves are manufactured
with white food grade EPDM flapper seals.
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2" SCV
2" Swing Check Valves
Temperature
Swing check valves are designed to operate to a maximum of 350°F
(176°C) temperature.
DO NOT OPEN INSPECTION CAP WHEN VALVE IS UNDER
PRESSURE!
Inspection and Maintenance
Swing Check valves need routine inspections.
Swing check valves can fail to operate if not properly maintained.
Frequently check for damage, loose or missing parts.
Swing check valves assure one-way airflow during the off loading or
unloading of product. Swing check valves prevent back flow of
product into the blower or piping system. These safety devices
consist of a simple flapper valve that swings clear of the air stream
during the normal off-loading operation, but will immediately close
when there is an air stoppage or airline pressure reversal. Once
installed, the valves are often ignored. However, they are a crucial
element in the proper operation of the dry bulk air transfer systems
and the protection of expensive blower equipment.
Swing check valve simplicity and historical durability are probably the
reason for inspection complacency. But, swing checks are subject to
temperature extremes and vibration fatigue that can affect wear and
longevity. Wear in particular can result as flapper and hinge
mechanisms vibrate constantly during road travel. Also remember
that blowers raise intake air temperatures by as much as 200°F. That
means if the outside is 100°F, then airline plumbing (including swing
checks) can reach 300°F. High temperatures combined with pulsation
stress from the blower and road travel vibration creates a hostile
working environment that warrants performance inspections on a
regular basis.
There are two basic ways to inspect swing checks: (a) visual/manual,
on the tanker and (b) removed from tanker, on a test stand.
Do not attempt to inspect the valve while in use; this may
result in severe damage or injury.
2" SCV
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2" Swing Check Valves
How to Inspect
1. Our easy opening access door allows for quick viewing of the
valve to ensure there is no blockage in the system.
2. Remove the inspection cap/cover and hand operate valve to
ensure springs are in good working order and flapper seats properly
without restriction.
3. Inspect springs and shaft for wear or broken springs.
4. Inspect valve seat for wear or gaps.
5. Inspect for product stuck in flapper assembly or valve seat causing
the flapper to hang open.
6. During re-assembly when closing access cap ensure O-ring is
properly seated and locking ring is fully engaged when closed, and
install cap.
Should problems be encountered replace valve immediately.
Inspection Frequency
Swing check valves should be routinely inspected as part of a
preventative maintenance schedule for dry bulk tankers. The units
should be given, at a minimum, a visual/manual inspection every 2-3
months.
Dixon Bayco Warranty
For complete warranty information, please refer to the latest
Dixon catalog.
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