A million miles.
A single mission.
2025 Gold Book
The Midland Gold Book is a comprehensive compilation of the products that Midland has designed, engineered, manufactured and is currently offering for use on railcars that transport hazardous and non-hazardous bulk products. The Gold Book contains technical drawings, parts lists and ordering information for the full range of models that are offered in 13 product categories.
-2.png.thumb.1280.1280.png.rendition.src.1768907230934.png)
Smart-Flow® Pressure Relief Valve
Newly AAR Approved!
The Smart-Flow® PRV complies with the latest requirements for DOT 117/TC 117 regulations and is the latest external pressure relief valve from Midland.
Gauge Device Online Tool
Need a new Gauge Device for your railcar? Ordering one is easier than ever with the new Gauge Device Online Tool. It allows all orders to be completed online with no paper forms to download and fill out, scan or print, and email or fax, resulting in a more efficient, accurate and reassuring ordering process.
Remanufacturing and Repair
Midland now offers repair services for most brands of railcar valves.
Emergency Response Kits
A chemical leak in a railcar's valve or fitting connection can be hazardous, not only to rail personnel, but to the environment and local populations. Midland's Emergency Response Kit (ERK) has been designed to allow for the quick and safe capping of leaking fittings on the top of pressurized railcars.
SOLUTIONS FOR EVERY RAILCAR.
- Gaging Devices
- Safety Relief Valves
- Rupture Disc Devices
- Vacuum Relief Valves
- Needle Valves
- Bottom Outlet Valves
- Miscellaneous Products
- Top-Transfer Angle Valves
- Gaging Devices
- Pressure Relief Valves
- Check Valves
- Lift Assisters
- Top-Transfer Angle Valves
- Gaging Devices
- Pressure Relief Valves
- Check Valves
- Lift Assisters
- Gaging Devices
- Safety Relief Valves
- Rupture Disc Devices
- Vacuum Relief Valves
- Needle Valves
- Bottom Outlet Valves
- Miscellaneous Products
- Top-Transfer Angle Valves
- Gaging Devices
- Pressure Relief Valves
- Check Valves
- Lift Assisters
- Top-Transfer Angle Valves
- Gaging Devices
- Pressure Relief Valves
- Check Valves
- Lift Assisters
OPW CORPORATE HEADQUARTERS
9393 Princeton-Glendale Road
Hamilton, Ohio, USA 45011
Copyright © 2026 OPW, A Dover Company, and its affiliated entities.