The definitive engineering guide to lug style butterfly valve cap screws. Find complete bolt quantity, diameter, and length charts for ASME Class 150/300/B16.47 and EN 1092-1 PN10/16/25/40 up to 60" (DN1500). Includes ASTM material grades and torque guide.

The definitive engineering guide and chart for butterfly valve bolting. Find the correct bolt quantity, diameter, and length for both Wafer and Lug style valves with ASME B16.5 Class 150 and EN 1092-1 PN10/16 flanges.

The ultimate digital lexicon of global flange standards. Exhaustive, unabridged data tables for every major pressure class in ASME B16.5, EN 1092-1, JIS, AS, and notes on GOST, GB, HG/T. The most complete archival resource for engineers.

The definitive engineering guide to pipe size conversion. Convert seamlessly between NPS, DN, fractional inches, decimal inches, and millimeters (mm) with our complete chart up to DN 3600 / 144 inches.

Decode valve specs. Our detailed guide explains PN, bar, MPa, and Class pressure ratings and DN to Inch size conversions with clear tables.

A power plant replaced a failing valve with a triple offset model, achieving zero leakage and restoring plant safety.

A case study on resolving GOST valve failures with JRVAL’s high-quality wafer butterfly valves.

A case study on upgrading from standard parts to a high-quality butterfly valve.