Valvulas Nacional SA were established in Spain in 1976. They manufacture a range of safety relief valves for use in the petrochemical, refining and chemical industries. Based in modern new facilities in Barcelona, Nacional offer flexible manufacturing solutions, ASME VIII “UV” Stamp Authorisation, stock materials for fast deliveries of standard and special materials and crucially a wealth of safety valve experience and innovation.

Main Design ASME VIII- Div. I. API STD 526.ISO 4126. AD 2000 – MERKBLATT A2
Calculation. API RP 520. ASME VIII. ISO 4126. AD MERKBLATT  2000
Tests. ASME VIII- Div. I. API STD 527. ISO 4126-1. UNE-EN 1593. AD 2000–MERKBLATT A2