What type(s) of Relieve Valves does Hawk manufacture?

Hawk Machine manufactures Relief/Pop Valves, ranging from ½” NPT up to 1” NPT in both AISI 316 stainless steel and carbon steel, for both corrosion resistance and mechanical strength.  Standard material hex sizes of 7/8” to 1 3/8” dia. with the 1 3/8” having an ¼” side port option. Stainless Steel and Inconel springs are used in the internals, to aid in resealing after pressure discharge. Pressure ranges for these relief valves are 150 psi up to 2500 psi, for applications in gas, oil and water.

What experience does Hawk have in fabricating relief valves and for what sectors?

Hawk Machine staff have decades of experience, machining, designing and testing, not only Relief and Pop valves, but many other small fittings. We have a team of designers and our certified CNC machinists keep us at the forefront of the industry for providing the very best product for you and your customer. Our fittings are used in the oil and gas sector, measurement and service sectors.

Does Hawk possess any specific expertise or equipment for manufacturing Relief Valves that is unique or different?

With top of the line CNC equipment and a certified ISO 9001:2015, our entire facility maintains strict standards established by our QA department. Hawk Machine is able to maintain quality, repeatability, and on time delivery. With custom testing equipment designed specifically for our Relief and Pop Valves, Hawk Machine has the ability to test valves with the accuracy needed to maintain valve and pipeline safety.

What is Hawk’s competitive advantage?

Hawk Machine has engaged a valve designer with over 30 years’ experience and has key staff experienced in the manufacture of fittings. This combined experience results in fast turnaround time and unsurpassed quality in the industry. Moreover, we are constantly researching and developing new methods of machining and testing in order to meet the demands of companies worldwide.

Why is a high-quality relief valve critical to Hawk’s customers’ operations?

With high-quality products, you can rest assured that your relief valve will perform and out-perform in the field. Our manufacturing specialists have knowledge in machining high tolerance and high surface finish parts. We recognize that Relief and Pop Valves have various internal and externals parts that require flawless components and precise assembly to maintain consistent operation in the field.

We are confident in our procedures that ensure an efficient production flow: from material handling, manufacturing, assembly, testing, and inspection by our QA department before shipping.

Are relief valves a standard product or are they customized for each customer or project?

Hawk Machine keeps stock of standard parts, external valve body blanks and internal parts designed to fit in all Hawk Relief and Pop valve sizes and pressures. This gives Hawk Machine Works the ability to deliver custom parts to your door or your customer’s door quickly. With years of experience from our valve team, we maintain the ability to cater to our customer’s specific needs.


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