Hy-Grade Series D

(High Performance Dual Plate)

Dual Plate Design
Manufacturing to API Std. 594
Integral Shaft and Disc Design with NO Hinge or Stop Pins
The Discs Swing Out of the Flow Stream Resulting in High Flow Capacities and Low Pressure Drops
Renewable Seats for Low Cost and Easy Maintenance
Each Disc has an Independent Spring for Instant Non-Slam Operation
The Springs are Shielded from the Flow Stream for Improved Service
Retainerless Design with No External Holes or Leak Points for Zero Fugitive Emissions

Sizes and Classes:
ASME 150 – 2500
16″ – 24″

Dual Plate Design

Dual Plate 1
Dual Plate 2
Check Valve 1 Dimensions
Check Valve 1

Ordering Information & Material Options

Ordering Info 1
Ordering Info 2
Ordering Info 3

Technical Information

Technical Info 1
Technical Info 2

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