GA Figure 25-DXH Oil-Controlled Closing Swing Check Valve

Productgroup: Check Valves

Medium: Water

The GA Industries Figure 25-DXH is a tight seating, non-slam swing check valve with two-stage closure to minimize surges associated with pump shutdown. 

The valve is designed to open smoothly on pump start providing full pipeline flow and minimal headoss.  At pump shutdown, the counterweight immediately and rapidly drives the valve closed during the initial stage. The hydraulic system is then engaged at a pre-determined point which provides an adjustable final stage closing speed, allowing a controlled amount of reverse flow through the valve to minimize pump shutdown pressure surge.  

  • Suitable for water or sewage
  • Resilient disc seat for tight shut off
  • Non-slam operation with pump shutdown surge reduction 
  • Rapid first stage closure, adjustable, controlled final closing speed
  • External and accessible hydraulic system
  • Factory assembled and tested
  • Body & Disc: Cast Iron, ASTM A126 Class B
  • Cover: Steel, ASTM A36
  • Body Seat: Stainless Steel, Type 316
  • Hinge Shaft: Stainless Steel, Type 303
  • Disc Seat: Thiokol Rubber
  • External Fasteners: Zinc Plate Steel
  • Standard: Uncoated internal, external coated with enamel primer, minimum 2 mil DFT
  • Optional: 316 SS external fasteners and internal and external NSF-61 certified 2-part epoxy, minimum 6 mil DFT
Drawing and Parts List
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Sample Specification
25DXH Specification
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Technical datasheet
Data Sheet 25DXH.01
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9025 Marshall Road
Cranberry Township, PA 16066
United States
Phone: +1 724-776-1020

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