Specifications:
The document provides detailed specifications for check valves, specifically ART. 048. The valves are available in sizes ranging from 1/2” to 2.1/2”. The materials used for the valve body include 1.4404 and 1.4435-BN2 stainless steel, with gaskets made from PTFE USP 70 and PTFE USP 121. The valves are designed for both horizontal and vertical assembly, with specific minimum opening pressures provided for each size.

Procedures:
The document outlines the assembly configurations for the check valves, including horizontal assembly and vertical assembly with both downflow and rising flow options. It specifies the minimum opening pressures in BAR, PSI, and KPA for each valve size under different flow conditions.

Standards and Norms:
The valves conform to ASTM A270 and the flange design follows ASME-BPE 2009 standards. The internal finishing is Ra ≤ 0.4 μm, and the external finishing is Ra ≤ 0.8 μm, mirror polished. The maximum working conditions are specified as 10 bar (120 psi) and 150°C (300°F).

Recommendations:
The document recommends using gaskets that are USP CLASS VI compliant, available in 70° PTFE or 121° PTFE. It also lists spare parts for the check valves, including clamps, gaskets, springs, and pistons, with specific codes for each size and material.

Key Data from Tables:
The tables provide detailed dimensions for each valve size, including diameter (Ø A and Ø B) and length (L). They also list the part numbers for each component, ensuring easy identification and replacement.

Critical Information:
The document emphasizes the importance of adhering to the specified standards and using FDA-approved materials for safety and compliance. It also highlights the need for proper assembly to ensure optimal performance of the check valves.