The company's safety relief valves are available in cast iron, bronze stainless steel, and aluminum in sizes ranging from ½ by ¾ in. through 6 by 8 in. for pressures up to 900 psig and temperatures from -423°F to +422°. The valves meet ASME Sections I, IV, and VIII, and API 527.

- Spence Engineering Company, Inc.
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