APV STANDARDS APV Standards comply with technical specification API-6A. The description for APV equipment consists of a general description, working pressure, temperature rating, material class rating, product specification level (PSL) and performance requirement (PR). These ratings are defined in the following API-6A tables. To comply with API-6A (ISO 10423), APV offers: Pressure ratings in psi: 2000, 3000, 5000, 10,000 & 15,000. Temperature ratings: L, P, R, S,T, U,V, X, &Y. Material class: AA, BB, CC, DD, EE, FF & HH. Product specification level: 1, 2, 3 & 4 (PSL 1, 2, 3, 4) Performance requirement: 1 & 2. RECOMMENDED MINIMUM PSL FOR PRIMARY PARTS * See paragraph A5 of API-6A 17a. Ed. 11 VALVE & CHOKE SPECIFICATIONS PAGE 70 NACE No Yes Yes Yes No Yes High H2S Concentrate No No Yes No No Yes Close Proximity * No No No Yes Yes Yes Rated Working Pressure, PSI :- PSL PSL PSL PSL PSL PSL 5,000 1 1 2 2 1 3 10,000 2 2 3 3 3 4 15,000 and up 3 3 4 4 4 4 PR1 is standard PR2 also available (increased cycle times on test required)