Dual Plate Lug Type Check Valve Dimensions - Complete Specifications Guide

Dual plate lug type check valves are essential components in piping systems that prevent backflow while maintaining minimal pressure drop and compact installation requirements. These valves feature two hinged disc plates that open under forward flow and close quickly when flow reverses, making them ideal for applications where space constraints and weight reduction are critical factors.

Manufactured according to API 594 standards, dual plate lug check valves are available in sizes ranging from 2 inches to 84 inches with pressure classes from 150 to 2500 ASME. The lug design eliminates the need for downstream flanges, allowing installation between two pipe flanges using through-bolts that pass through the valve's lugs. This configuration significantly reduces valve weight by 80-90% compared to conventional flanged check valves while providing easy maintenance access.

Key dimensional specifications include face-to-face lengths per ASME B16.25 standards, bolt hole patterns matching standard flange dimensions, and retainerless body designs that eliminate external leak paths. The valve's compact profile and threaded lug holes make it particularly suitable for retrofitting existing systems and applications with limited installation space.

Understanding proper dimensional specifications is crucial for system design, ensuring adequate clearance, proper bolt sizing, and optimal flow performance. The following dimensional charts and specifications provide comprehensive data for selecting and installing dual plate lug type check valves in various industrial applications.