Sea-Bird Refrigeration Pvt. Limited manufactures Screw Type Safety Valve. Sea-Bird Refrigeration Pvt. Limited offers a wide range of Refrigeration and Air-Conditioning Compressors like Hermetic Compressors, Valve Fittings, Condensing Unit and Compressor Spare Parts & Accessories. The Screw Type Safety Valve is available in various sizes ranges of ½" and ¾" and is made of high grade material for use in various industrial applications. The Screw Type Safety Valve is normally set at 250 pounds per square inch pressure and also comes set in higher or lower pressure ratings.