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Important: To properly operate and maintain your Bayco 4040 / 4041 / 4042 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.
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 round-flanged model (4040RD / 4041RD / 4042RD).
Temperature: Bayco 4040 swing check valve is not recommended for direct blower mounted
service. For direct blower mounted service use either the 4041 swing check valve (metal-to-
metal seat) or the 4042 swing check valve (silicone-to-metal seat).
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.
NOTE: 4041RK1 and 4042RK1 flapper replacement kits will normally not be
compatible with 4040 style bodies that were manufactured prior to March 2007. Any
4040 style bodies manufactured after March 2007 will be compatible with these
4041RK1 and 4042RK1 flapper replacement kits.
To achieve compatibility a sub kit is included in 4041RK1 and 4042RK1 that
includes shorter axial shafts and smaller torsion springs that will enable the 4041 and
4042 style flappers to fit inside 4040 bodies that were manufactured prior to March
2007.
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Disassembly or
090093 R6
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