ISO 9001 Registered | ASME Certified Advanced Pneumatic Conveying Systems Controlled Injection Systems Inflatable Seat Valve Process Engineering Extreme Reliability for Severe Applications Minimal Maintenance Decreased Downtime Seamless Integration Fully Customizable The Macawber Dome Valve® is a hemispherical actuating valve utilized as the filling valve to our various low velocity pneumatic conveying systems allowing a full-port flow of material from a material feed source, such as a hopper or silo. Its unique sealing technique ensures the valve is completely leak proof even when handling abrasive bulk materials across high pressure differentials and high temperatures. The seal member is able to compensate for wear achieving long life and reliability. Due to its simplicity, functionality and robust design it has been deployed into various applications from vessel filling valve to emptying valve in reactors, gasifiers, driers and mixer as well as electrostatic precipitators, baghouses and many others. • Original patent holder (patent no. 4,137,935 | 5,642,751) • Pressure rating up to 1300 psig (91 barg) • Designs available from 1 inch to 32 inches • Standard material A278 cast iron • Standard #150 ANSI inlet flange pattern. Available in standard custom patterns. • Available in 304/316 stainless steel, aluminum, galvanized, and others • Food grade, FDA, and pharmaceutical finishes • Industrial coatings such as Teflon®, tungsten carbide, nickel, and others • Elastomer options neoprene, silicone, Viton, EPDM, FDA rubber • Fully assembled and tested prior to shipment / Manufactured in Maryville, TN USA • Global customer support for service and spare parts India - Macawber Engineering Systems India, Ltd. Pvt. China - Macawber China 1829 Clydesdale Street, Maryville, TN 37801 USA

ISO 9001 Registered | ASME Certified Advanced Pneumatic Conveying Systems Controlled Injection Systems Inflatable Seat Valve Process Engineering OTHER SIZES AVAILABLE UPON REQUEST INFORMATION NOT CERTIFIED FOR INSTALLATION PURPOSES UK - Mactenn Systems, Ltd. India - Macawber Engineering Systems India, Ltd. Pvt. China - Macawber China www.macawber.com 1829 Clydesdale Street, Phone: +1 (865) 984-5286

ISO 9001 Registered | ASME Certified Advanced Pneumatic Conveying Systems Controlled Injection Systems Inflatable Seat Valve Process Engineering PHO = 212 F PHV = 400 F MAX. / BULKHEAD CONFIG URATION OTHER SIZES AVAILABLE UPON REQUEST INFORMATION NOT CERTIFIED FOR INSTALLATION PURPOSES UK - Mactenn Systems, Ltd. India - Macawber Engineering Systems India, Ltd. Pvt. China - Macawber China 1829 Clydesdale Street, Maryville, TN 37801 USA