BENDIX SC-3 INLINE SINGLE CHECK VALVES Manual

Bendix SC-3 In-Line Single Check Valves
® ™
(one sc-3
™
valve model
features
this 1/16"
pipe plug)
FIGURE 1 - SC-3 Single CheCk valveS
™
DESCRIPTION
The Bendix SC-3 in-line single check valve is a device
® ™
placed in an air line to allow air flow in one direction only
and to prevent flow of air in the reverse direction.
The two types of SC-3
™
1. The wafer-style type (Figure 2).
2. The ball type (Figure 3).
An arrow indicating the direction of air flow is found on the
body of the valve.
OPERATION
Air flow in the normal direction moves the check valve
from its seat, and the flow is unobstructed. Flow in the
reverse direction is prevented by the seating of the ball or
wafer-type disc, which is caused by a drop in up-stream
air pressure and assisted by the spring.
PREVENTATIVE MAINTENANCE
Important: Review the Bendix Warranty Policy before
performing any intrusive maintenance procedures. A
warranty may be voided if intrusive maintenance is
performed during the warranty period.
in-line single check valves are:
inlet
inlet
FIGURE 2 - SC-3 Single CheCk valve: wafer-type
™
(exterior and CroSS-SeCtional viewS)
outlet
FIGURE 3 - SC-3 angle CheCk valve: ball type
™
(exterior and CroSS-SeCtional viewS)
No two vehicles operate under identical conditions; as
a result, maintenance intervals may vary. Experience is
a valuable guide in determining the best maintenance
interval for air brake system components. At a minimum,
the SC-3 valve should be inspected every 6 months or
™
1500 operating hours, whichever comes first, for proper
operation. Should the SC-3
of the operational tests noted in this document, further
investigation and service of the valve may be required.
Replace any check valves leaking or showing signs of
wear or deterioration.
outlet
spring
outlet
wafer-type
check valve
inlet
spring
ball
valve not meet the elements
™
outlet