America’s chemical transport companies rely on Midland products for routine safe handling of ethylene oxide. You can depend on Midland’s market-leading reputation to deliver durable, easy-to-use and safe products that are specifically engineered to withstand the abuse of harsh rail-transport environments with products that exceed industry standards. We strive to provide the most responsive technical support in the industry backed by innovative engineering designs that can solve even your toughest requirements.

Midland Experience

The experts at Midland Manufacturing design and manufacture high-quality pressure relief valves, loading/unloading angle valves, actuator systems, level measurement gages and other equipment for ethylene oxide applications. Midland is unmatched in design expertise, product offering, quality, support and dedication to customer-focused service. Our products meet, and typically exceed, AAR regulations.

Midland recognizes that it is the responsibility of the shipper to specify the proper railcar valves and fittings for the safe loading, transport and unloading of products under pressure and has designed these components with the shipper in mind.









  • Our 2" angle valves feature soft seating for a more consistent and reliable seal
  • The Enhanced Fitting Design (integrated angle valve and spring loaded check valve) combined with the Low-Profile Pressure Relief Valve provides maximum spill protection in the event of accident
  • Stem packing is adjustable to adapt to the changing conditions in which the valves operate, allowing the valve to last longer in service without issues
  • Midland pressure relief valves have excellent flow characteristics to meet industry requirements
  • The pressure relief valves are all cap-able with the current Emergency Response Kit
  • The Midland B-612 has been in service for 40 years proving to be reliable and efficient over the long life of the tank car

Advantage (Application-to-Spec)

  • Midland supplies the most complete package for ethylene oxide applications including angle valves, check valves, pressure relief valves, thermowells, sample lines and gaging devices
  • Stainless Steel is used for all “wet” components, with other materials available per custom specifications
  • Our new NGRTC valve package meets the new regulatory requirements for the transport of TIH and PIH commodities including ethylene oxide
  • Soft-seated angle valves and check valves for more consistent sealing
  • The new Low-Profile PRV can be use with traditional or Next Generation Enhanced Fitting configurations
  • Cap-able with the current Emergency Response Kit