With roots in the fiberglass industry stretching back more than 50 years, Signature Enclosures Inc. manufactures fiberglass enclosures for demanding industrial applications. The Avondale, Pennsylvania company has specialized in these products for 30 years, designing NEMA 4X enclosures—including insulated models—for equipment exposed to corrosive conditions and temperature extremes. Its in-house tooling and engineering support allow the company to modify standard designs without treating each project as a special order.
NEMA 4X Standards
Compliance program
Shelter WorksFounded in 1995, Shelter Works designs and manufactures custom fiberglass-reinforced plastic shelters, buildings, cabinets, and equipment enclosures for protecting critical field infrastructure. With two manufacturing facilities and more than four decades of combined experience in custom fiberglass construction, the American manufacturer is known for its proprietary FiberBeam™ technology, engineered-to-order designs, and a 25-year warranty. Its shelters serve demanding settings from water treatment and natural gas operations to telecom and aviation, including FAA-compliant frangible enclosures.BUCYRUS, OH
Fibox EnclosuresFibox Enclosures makes non-metallic thermoplastic enclosures that protect electrical and electronic components in harsh and hazardous environments. The Finnish Fibox group pioneered injection-molded polycarbonate enclosures for the electrical industry in 1966, and its U.S. subsidiary, established in 1997, supports customers with stocked products and enclosure customization from its Maryland service center. Fibox holds ISO 9001:2015 certification and offers more than 1,000 standard enclosure configurations, including large polycarbonate cabinets and precision-machined modifications.GLEN BURNIE, MD
GEF IncorporatedFounded in 1987, GEF Incorporated engineers, designs, fabricates and installs structural fiberglass solutions for industrial and outdoor corrosion problems. Based in Winfield, West Virginia, the company makes standard and custom fiberglass products and provides shop fabrication and assembly of parts and structures.WINFIELD, WV
APG Vision, LLCSince 1990, APG Vision has manufactured camera and lighting enclosures that keep machine-vision equipment working in corrosive, wet, dusty and potentially explosive industrial environments. Based in Allison Park, Pennsylvania, the company maintains a catalog of more than 5,000 NEMA enclosures while also designing custom housings and OEM solutions, including FDA-compliant washdown applications. Its products are built to address standards such as NEMA, IP and explosion-proof specifications.238210ALLISON PARK, PA