Dual Plate Lug Check Valve Manufacturer in India
A dual plate lug check valve combines spring-assisted dual-plate closure with a lug-style body that is positioned between pipeline flanges. The lug arrangement provides defined bolting points and can be advantageous where piping configuration or maintenance requirements call for a lug-mounted body. Speciality Valve offers this construction for industrial process, water, hydrocarbon, marine and utility piping in different body, disc, spring and seat combinations.
Dual Plate Lug Check Valve Service Applications:
Pump Discharge Protection: Prevents reverse flow toward pumps during shutdown and flow interruption.
Parallel Pump Systems: Helps prevent reverse circulation through an idle pump during changeover.
Cooling-Water Circuits: Provides automatic non-return protection in circulating-water piping.
Vertical Piping Runs: Applicable where the selected dual-plate design supports the required flow direction and installation orientation.
Equipment Outlet Lines: Protects connected pumps, compressors and process equipment from downstream-to-upstream flow.
Lug Check Valve Technical Data:
Body, Disc and Spring Materials:
The final material combination should account for fluid chemistry, temperature, pressure, corrosion mechanism and mechanical loading.
Material Grades for Pressure-Bearing Construction:
Lug Body and Flange Interface:
Lug construction: Provides integral external lugs for bolted pipeline connection.
Flange alignment: Body dimensions must match the applicable mating flange arrangement.
Bolt loading: Lug dimensions and bolt pattern must accommodate the specified piping class.
Compact installation: The short-body construction reduces face-to-face space compared with many conventional swing designs.
Maintenance access: Pipeline isolation requirements should be reviewed before removal.
Orientation: Installation direction must follow the approved flow arrow and manufacturer design.
Pressure, Size and Connection Details:
Standards and Inspection Requirements:
API 594: Covers Type A check valves including lug and dual-plate arrangements.
ASME B16.34: Addresses pressure-temperature ratings, materials, testing and marking.
ASME B16.10: Applies to dimensional interchangeability where specified.
API 598: Covers valve inspection and pressure testing.
ISO 5208: May be specified for pressure and leakage testing.
Send the flange class, line size, medium, operating temperature and pressure to establish the appropriate lug body, disc material, seat construction and spring arrangement for the application.
