INSTALLATION AND MAINTENANCE MANUAL
Emergency/Remote Shutdown Air Valves
Betts Industries Inc. ▪ 814·723·1250 ▪ 1800 Pennsylvania Ave. West ▪ Warren, PA 16365 ▪ www.BettsInd.com
Print Date: 11/21/2023 This form is considered uncontrolled 24 hrs. after print date.
Investigate reason for O-Ring swelling.
Incompatible airline additives should not be
used. Product may be leaking into airline from
one of the Emergency Valves or Air Manifold.
See specific problem below: Product of cargo
tank leaking from exhaust port (liquid/fumes).
Investigate reason for O-rings (3) damage.
Burrs or sharp edges inside bore should be
removed without damaging sealing surface prior
to replacing O-rings (3).
Bore of control block (1) damaged or dirty.
Clean and inspect bore of control block (1). If
bore is damaged replace the entire valve.
O-ring grooves on piston (2) scratched or dirty.
Clean and inspect piston (2). If piston (2) is
damaged replace piston (2).
Bushing (5) has partially pulled out.
Remove and discard bushing (5). Replace
bushing following step 6.2.1.
Flange nut (7) is not threaded down to
shoulder of piston.
Apply thread lock compound to the threads of
the piston (2). Remove end cap (10) and hold
piston (2) stationary with Allen wrench. Tighten
flange nut (7) down to the shoulder of the piston
(2). Tighten the Control knob (8) to the flange
nut and lock together.
Product of cargo tank
leaking from exhaust
port. (liquid/fumes)
This could be an indication of a seal failure in
one of the Emergency Valves or Air Manifold.
Investigate and repair the problematic
component of Emergency Valve or Air Manifold.
Flush and dry all airlines.
The Emergency/Remote Shutdown Valve should
be taken apart, cleaned and O-rings (3) replaced
prior to placing back in service.
Detent is not providing
a positive “click-in” feel
in both the open and
closed position.
Detent O-ring (4) is worn.
Replace with new detent O-ring (4). Please
note, this O-ring is a split polyurethane O-ring.
Flammable Product - Cargo tank, piping
or air system may contain product that
could present risk of fire, explosion,
asphyxiation or other hazards resulting in
death or serious injury.
To Previous Page
Loading...