The DUCO safety fittings are manufactured by PenTec BV. PenTec BV is an ISO9001 certified company. DUCO's safety devices are manufactured and assembled in accordance with CE (no. 476) / Pressure Equipment Directive 97/23/EC modules B and D/ EN4126-1 / EN1491 / EN1488. In addition to a Declaration of Conformity each product group also has a Declaration of Performance certificate.