Bellows Valves

Offer a precision-formed metal welded bellows assembly that has undergone electro polishing processing for maximum cycle life.

Designed to meet the extreme conditions of gas and liquid systems, our bellow valves provide outstanding quality and high reliability. Multipurpose valves easily accommodate full system pressures with stability and safety. Clean operation is a hallmark of the Hy-Lok bellow valve.

Hy-Lok bellows valves are easily panel mountable, have handle options such as round and toggle, and pneumatic actuation. Ball bearing application between the upper and lower stem provides smooth operation and the bonnet seals to the body without a gasket.

Precision formed metal bellows and nonrotating stem tip feature excellent corrosion resistance and long cycle life. Valve body is constructed from single vacuum melt 316L stainless steel and has variable end connections. Sizes include 1/4″, 3/8″ and 1/2″ with end connection options that include Hy-Lok tube fittings, male / female ZCR fittings, and tube butt welds.

Metal bellows sealed valves are assembled in a class 10 clean room and passivation is done in a nitrogen environment. Ultrasonic cleaning is performed after passivation to ensure purity. Valves are also 100% helium leak tested.

Packaged in purified, anti-static polyethylene bags that are pressurized into the high purity nitrogen gas protects valves during shipping and storage.

These valves offer an operating temperature rating of -20°F to approximately 200°F and a maximum working pressure up to 250 psig (17.3 bar).

Hy-Lok has a bellows valve solution to meet the needs of any industry and application. Hy-Lok bellows valves are commonly found within applications in industries such as semiconductor manufacturing, biotech, and pharmaceutical.

Design and engineering of the Hy-Lok bellows valves is the highest quality in the industry and will withstand the challenges of the most demanding applications. For reliable and long lasting service the best choice is a valve that is tested and manufactured to the highest standards and meets industrial standards for safety and environmental requirements. No other valve on the market today can compare to Hy-Lok.


If you have any questions about any of our products or services, don’t hesitate to give us a call. For any inquiries, fill out the form and one of our Hy-Lok representative will contact you soon.


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