Made in America.
For Over a Century.
Cyrus Shank Company has manufactured precision refrigeration valves in the United States since 1912. Our commitment to quality, traceability, and domestic manufacturing has never wavered.
What We Stand For
Built on four principles that have never changed.
American Made
Every valve is designed, machined, assembled, and tested in our Williamsport, PA facility. We have never outsourced manufacturing.
ASME UV Certified
Our pressure relief valves carry the ASME UV stamp, meeting the highest standards for code compliance in commercial and industrial refrigeration.
Custom Set Pressures
We set every relief valve to your exact specified pressure at no extra charge. Each valve ships with an individual test tag documenting its set pressure.
Individually Tested
No valve leaves our facility without being individually tested and certified. Full traceability documentation is available for every order.
Our Story
Over 110 years of precision valve manufacturing.
Cyrus Shank Company was founded in Williamsport, Pennsylvania in 1912 with a single purpose: to manufacture the most reliable, precisely machined refrigeration valves in America.
For more than a century we have supplied ASME UV-stamped pressure relief valves, hand valves, manifold assemblies, pop indicators, and dual assemblies to engineers, contractors, and OEM manufacturers across every industry that depends on refrigeration.
Our products are specified in cold storage warehouses, food processing facilities, commercial refrigeration systems, and large-tonnage industrial ammonia systems across all 50 states.
Recent innovations include the 800QR two-piece Quick Release cartridge valve — which lets technicians replace the insert without removing pipe — and the Green Line aluminum series, manufactured from recycled 6061-T651 aluminum using renewable energy sources. Both carry ASME UV certification and the same 100% individual bench test standard we have held since 1912.
Every valve that leaves our Williamsport, PA facility is individually tested and UV stamped before it ships. Custom set pressures at no extra charge — as it has always been.
Williamsport, Pennsylvania
Manufacturing & headquarters since 1912
Company History
More than a century of milestones.
Founded in Williamsport, Pennsylvania
Cyrus Shank Company is established in Williamsport, PA with a single focus: manufacturing precision refrigeration valves for the American market.
Wartime Manufacturing
Cyrus Shank supplies valves for critical refrigeration applications during World War II, establishing a reputation for reliability under demanding conditions.
ASME Certification
Cyrus Shank earns ASME UV stamp certification, enabling production of code-stamped pressure relief valves for commercial and industrial applications.
Expansion into Industrial Refrigeration
The product line expands to include high-pressure ammonia service valves for industrial refrigeration facilities across the food processing and cold storage industries.
Nationwide Distribution Network
A network of regional sales representatives is established across all 50 states, ensuring engineers and contractors can specify Cyrus Shank valves for any project.
Quick Release and Green Line Innovations
Launch of the 800QR two-piece Quick Release valve — allowing field cartridge replacement without pipe removal — and the Green Line aluminum series, manufactured from recycled 6061-T651 aluminum with renewable energy. Both series carry full ASME UV certification.
113 Years — The Broadest Relief Valve Line in the Industry
Every Cyrus Shank valve is still manufactured and individually tested in our Williamsport, PA facility before shipment. Custom set pressures at no extra charge, same-day shipment as our specialty — as it has always been.
1912
Year Founded
110+
Years in Business
50
States Served
100%
US Manufactured
Get in Touch
Questions about our products or capabilities?
Our team is available to discuss your valve requirements, answer specification questions, and connect you with the right regional representative.
Headquarters & Manufacturing
Williamsport, Pennsylvania
United States of America
Main Office
(812) 569-7651