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Circle Seal Controls precision check valves, relief valves, and solenoid shutoff valves are engineered for critical sealing and flow control in demanding industrial systems.
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Precision-Engineered Valves from Circle Seal for Demanding Aerospace & Industrial Use

Circle Seal Controls delivers industry-trusted valve solutions engineered for performance in the most demanding environments. Known for their precision check valves and relief valves, Circle Seal also manufactures high-quality solenoid valves, shutoff valves, pressure regulators, and specialty valves. These products are ideal for aerospace, defense, and industrial applications where accuracy, reliability, and compact design are critical. Explore by category to find the right solution.

Check Valves

Ensures one-way flow and prevents backflow in high-pressure systems. Ideal for aerospace, fuel, and hydraulic uses needing tight seals and long-lasting durability.

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Relief Valves

Provide overpressure protection by venting excess pressure in critical systems. Used across industrial, defense, and aerospace applications where safety is paramount.
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Solenoid Valves

Electrically operated valves for precise fluid and gas control. Designed for space-constrained systems requiring fast response and high reliability under harsh conditions.
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Shutoff Valves

Manual and automated shutoff valves for safe system isolation. Common in mission-critical fluid systems where zero leakage and operational integrity are essential.
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Pressure Regulators

Maintain consistent downstream pressure in variable input conditions. Ideal for fuel systems, gas delivery, and pneumatic control in industrial and aerospace settings.
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Speciality Valves

Engineered for specialized fluid control applications requiring precision, dependable sealing, and reliable performance in aerospace, defense, and industrial systems.
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FEATURED PRODUCT

100 Series Check Valves

Circle Seal Controls 100 Series Check Valves deliver dependable one-way flow control for low-pressure liquid and gas applications. Designed for precision sealing and long service life, these compact valves provide reliable performance across aerospace, industrial, laboratory, and OEM systems.

Ultra-Sensitive Performance

Designed with low cracking pressure for responsive operation in low-pressure systems where precise flow control is essential.

Positive Bubble-Tight Sealing

Provides dependable one-way flow with reliable sealing to help prevent reverse flow and system contamination.

Compact, Durable Construction

Available in aluminum, brass, and 303 stainless steel with a compact inline design for easy installation in space-constrained applications.

Wide Material Compatibility

Compatible with Buna-N and Viton® seal materials to support a variety of gas and liquid service requirements.

Trusted Industrial Performance

Engineered for aerospace, laboratory, OEM, and industrial applications requiring consistent, leak-tight operation and long-term reliability.
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