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1 Regulations and Safety Requirements
Regulations
Midland bottom-outlet ball valves are used in contact with a variety of products, many of which are hazardous materials
and could cause serious injury or damage if mishandled. The acceptance and transportation of products are regulated
by the DOT and AAR in the U.S.A., and in Canada by CTC and Transport Canada. Regulations of other governmental
bodies must be complied with for stationary and mobile applications. All personnel should be familiar with and follow
these regulations. Nothing in these instructions is intended to conflict with or supersede these regulations. The
information in this document was gathered from knowledgeable sources. However, Midland Manufacturing Corporation
makes no representations or guarantees about its accuracy or completeness and assumes no liability for this
information.
This valve should only be installed, operated and maintained by qualified personnel. Read all of these instructions
carefully before proceeding.
Operation of the valve must conform to all applicable specifications from TC, AAR, DOT, CFR (Parts 173.31, 174.67,
etc.) and other governmental bodies, along with the operating instructions of your company.
Safety Warnings and Precautions
Please carefully read each of the following warnings and cautions prior to performing any work.
WARNING: Toxic Hazard. Always use extreme caution and proper equipment when involved with hazardous
materials. To avoid exposure to toxic or hazardous materials, make sure the tank car is empty and clean, and
that the work area is free of hazardous chemicals before removing or installing any valve.
• Wear protective clothing and equipment suitable for withstanding the materials to which you
may be exposed
• Position yourself on the upwind side of the valve when possible
• Work in a well-ventilated area
• Work with a partner who can help you in the event of an emergency
• Follow approved safety precautions for hazardous or toxic materials
• Obtain MSDS sheets for all the commodities used with the associated valve
CAUTION: Valve Damage. Avoid using forceful tools on seal-support surfaces when removing ball seals and
stem packing, or damage may result.
CAUTION: Sealing-Surface Damage. A damaged sealing surface on the valve flange may prevent proper
sealing on the tank-car mounting and result in leakage of the tank contents.
A-520/A-522/A-522A, Rev. 3.0
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