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Groth Corporation manufactures pressure and vacuum relief valves, flame and detonation arresters, tank top appurtenances, test stands, digester cover and gas control equipment, blanket gas regulators and other low pressure relief products. It also provides waste gas burners, pressure regulators, sediment and flame traps, check valves and drip traps. The company serves the chemical, oil and gas, biogas processing, pharmaceutical, and food and beverage industries. Established in 1960, Groth Corporation is a member of the Valve Manufacturers Association. It serves various refineries, chemical processing plants, and atmospheric and fixed-roof storage tank facilities. Groth Corporation is located in Stafford, Texas.

FITOK Group, established in 1998, is a renowned developer and manufacturer of high-quality instrumentation valves and fittings. With R&D centers, manufacturing facilities, warehousing, and service locations in Offenbach, Germany, and Texas, USA, FITOK has solidified its position as an industry leader. Committed to excellence, FITOK Group continues to deliver superior products that meet the highest standards of quality and performance. With a strong presence in key locations, FITOK remains dedicated to providing innovative solutions to its global customer base. Generated from their website's infomation

Kitz Corporation of America is one of the world's leading manufacturers of valves. Founded in 1951, it offers a variety of carbon and stainless steel, gray and ductile iron, and bronze and brass valves and actuators. The company specializes in providing product handling, customized design and development, production, distribution and customer support services. Kitz Corporation of America offers order tracking, technical assistance and marketing services. The company also provides valves and parts repair and modification services for commercial and residential customers. Kitz Corporation of America offers products from the Keepalloy brand. In addition, it provides quality control and testing services.