Dixon 3030SQ, 3030SQ-SSP, 3031SQ, 3030RD, 3030RD-SSP Installation & Operating Instructions Manual

Installation & Operating Instructions

BAYCO 3” SWING CHECK VALVES

For

3030SQ — 3” Swing Check Square Flange with Molded Flapper
3030SQ-SSP — 3” Swing Check Square Flange with High Heat Silicone Flapper
3031SQ — 3” Swing Check Square Flange with High Heat Metallic Flapper

3030RD — 3” Swing Check TTMA Round Flange with Molded Flapper
3030RD-SSP — 3” Swing Check TTMA Round Flange with High Heat Silicone Flapper
3031RD — 3” Swing Check TTMA Round Flange with High Heat Metallic Flapper

3030TE — 3” Swing Check NPT Threaded Ends with Molded Flapper
3030TE-SSP — 3” Swing Check NPT Threaded Ends with High Heat Silicone Flapper
3031TE — 3” Swing Check NPT Threaded Ends with High Heat Metallic Flapper

3030VIC — 3” Swing Check Victaulic Ends with Molded Flapper
3030VIC-SSP — 3” Swing Check Victaulic Ends with High Heat Silicone Flapper
3031VIC — 3” Swing Check Victaulic Ends with High Heat Metallic Flapper

For Sales & Service Contact

USA:

Dixon Bayco USA

Chestertown, Maryland
Phone: [phone]
Fax: [phone]
Toll Free: 800-355-1991
E-mail: [e-mail]

www.dixonbayco.com

Mexico:

Dixva, S. de R.L. de C.V.

Monterrey, N.L
Phone: [phone]-DIXON (34966)
Fax: [phone]
E-mail: [e-mail]

www.dixonvalve.com

Asia Pacific:

Dixon (Asia Pacific) Pty Ltd

Wingfield, South Australia
Phone: [phone]
Fax: [phone]

E-mail: [e-mail]

www.dixonvalve.com.au

For Pneumatic Service

Part Numbers:

Canada:

Dixon Group Canada Limited

Innisfil (Barrie), Ontario
Phone: [phone]
Fax: [phone]
Toll Free: 877-963-4966
E-mail: [e-mail]

www.dixongroupcanada.com

Europe:

Dixon Group Europe Ltd

Preston, England
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

www.dixoneurope.co.uk

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Important: To properly operate and maintain your Bayco 3030 / 3031 swing check valve, the

following instructions are provided. Please read with care as improper handling or
maintenance may cause a hazardous condition.

Caution

: Do not modify your Bayco Swing Check Valve for any reason. It could result in a

hazardous condition causing operating difficulties or malfunction. Disassembly or
tampering will void the product warranty.

Installation

: Bayco swing check valves are properly adjusted, tested and ready to use upon
leaving the factory. Swing check valves are designed to be tough and to provide long
service with reasonable care and handling.
Ensure arrow is pointing downstream of product flow when installing. Apply appropriate
gasket for square-flanged (3030SQ / 3031SQ) and round-flanged (3030RD / 3031RD)
models.

Temperature

: Bayco 3030 series swing check valves with molded flappers are not
recommended for direct blower mounted service. For direct blower mounted service use
3031 (or 3030-SSP) series swing checks valves.

INSPECTION / MAINTENANCE: 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 devises 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 200F. That means if the outside is
100F, then airline plumbing (including swing checks) can reach 300F. 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.

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Inspection Procedure: The complete valve assembly may be removed and replaced without

removing the valve body from the system. Please note that the shafts and springs are
designed for left and right orientation, ensure that these components are located correctly.
The colored spring should be used in conjunction with the right hand threaded shaft.

a) Remove the inspection cap/cover and hand operate valve to ensure springs are in good

working order and flapper seats properly without restriction.

b) Whilst pulling the flapper forwards, pull upwards on the valve yoke to withdraw the

complete flapper assembly (take care to ensure that springs are secure during valve
withdrawal).

c) Inspect valve seat and valve for wear or gaps.
d) Inspect for product stuck in flapper assembly or valve seat causing the flapper to hang

open.
Should problems be encountered replace valve immediately.

If springs are replaced, please ensure that, after replacement, the valve assembly is free to
swing to the fully open position (90°) without excessive resistance. If excessive
resistance is felt:

1. Ensure that the springs are fully pressed onto the shaft

2. Reduce spring pre-load by moving torsion spring legs to alternative pre-load stop.

The correct amount of pre-load allows the valve to be freely opened to 90°.

IMPORTANT: Your Bayco 3030 / 3031 swing check valve is designed for minimal flow

restriction and low pressure drop during operation. The valve return springs are designed
to provide sufficient pre-load to return the valve to the closed position with only limited
pre-load. Excessive pre-loading of the return springs may lead to premature failure.

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 2-3months.

Do not use anything other than genuine Bayco parts in your Bayco swing check valve.
Repair kits are available for all replaceable parts (refer to parts breakdown for details).
Use of non-approved or modified parts can result in a hazardous condition due to
operating difficulties or operation malfunction. Modification or tampering will void the
product warranty.

CAUTION: Do not attempt to inspect the valve while in use; this may result in severe

damage or injury.

DIXON BAYCO WARRANTY: For complete Warranty information, please refer to the inside

back cover of the latest Dixon Catalogue.

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