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.
3.0 Description and Intended Use
The Betts’ Emergency/Remote Shutdown Air Valve is a two position push/pull control valve. When plumbed and
mounted correctly, it fulfills the requirements of a remotely actuated means of closure per US DOT 49CFR§178.345-
11(b)(1)(i) and CSA B620-20 clause 5.6.12.3(b), (c), and (f). The Emergency/Remote Shutdown is mounted on the
end of the cargo tank farthest away from the loading/unloading outlet with normal position of the valve in the pulled-
out position and initiates shutdown function when the knob is pushed in. Please note, the Emergency/Remote
Shutdown Valve does not provide provision for thermal activation. If required, fusible plugs should be installed in-
line as needed.
The valve block is lightweight anodized aluminum. The valve includes a detent retention feature for positive click-
in feel during operation. All ports are ¼” NPT. The valve can be mounted via the through holes in the valve body
or through a Ø.81” hole in a panel and secured with the ¾“ hex nut (included).
Simplified plumbing schematics are provided below for the two most common methods of operation. A detailed
plumbing schematic is available upon request. Verify proper shutdown function once valve is installed and test
monthly during active service.
Plumbing Option 1
Emergency Shutdown provides positive air signal
Plumbing Option 2
Emergency Shutdown exhausts air system pressure
Knob pushed-in position: Positive
air signal is sent from port 2 to
compatible Air Panel or Master
Control Valve which shuts down
pneumatic valve system.
Knob pushed-in position: Port
2 exhausts air pressure from
air-lines and shuts down
pneumatic valve system.
Knob pulled-out position: Port 2
exhausts air pressure from Air
Panel or Master Control’s reset
ports and the cargo tank valve
system is now operational.
Knob pulled-out position: Port
2 supplies air pressure to
pneumatic valve system and
the cargo tank valve system is
now operational
4.0 Installation
4.1 Per US DOT 49CFR§178.345-11(b)(1)(i), the Emergency Shutdown Valve must be “located more
than 10 feet from the loading/unloading outlet where vehicle length allows, or on the end of the
cargo tank furthest away from the loading/unloading outlet.”
4.2 Per §172.328(d) “each on-vehicle manually-activated remote shutoff device for closure of the
internal self-closing stop valve must be identified by marking “Emergency Shutoff” in letters at least
0.75 inches in height, in a color that contrasts with its background, and located in an area
immediately adjacent to the means of closure.”
4.3 The valve can be mounted via the through holes in the valve body or through a Ø.81” hole in a
panel and secured with the ¾“ hex nut (included). See figures 1 and 2.
4.4 The valve should be mounted with exhaust port facing down protected from moisture. If needed,
utilize an elbow and drop tube to route the exhaust to an area free of moisture or debris.
4.5 If airline conditioner/antifreeze is used, it must be compatible with O-ring material.
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