Structural Feature Short structural length,only 1/4~1/8 of that of traditional flanged check valve; Low volume,light weight,only 1/4~1/20 of those of traditional flanged check valve; Quick valve disc closedown,low water hammer pressure; Applicable for and easily installed for vertical or...
Double Plate Check Valves are designed to automatically prevent backflow in systems where it is desirable to permit flow in one direction and prevent flow in the opposite direction. When the pump starts and the downstream flow creates the required pressure drop in the forward direction, the Dual Plates will automatically open. When the pump stops and the flow ceases, the torsion of the spring will automatically close the Dual Plates prior to flow reversal. This creates a positive shutoff against flow reversal and eliminates system surges and water hammer.
Nominal diameter: 1.5" ~ 60" (DN40 ~ DN1500)
Pressure range: Class 150 ~ Class 2500 (PN16 ~ PN420)
Working temperature: -196℃ ~ +560℃
Body material: Carbon steel, Stainless steel, Alloy steel, Bronze
Operation Type: Lever, Gear, Electric, Pneumatic, Hydraulic
Main Parameter Specification
Inspection and test: API598, JB/T9092;
Design and manufacture: API594, API 6D, JB/TB8937;
Face to face and end to end: API594, API6D, DIN3202, JB/T8937;
Pressure-temperature rating: ASME B16.34, GB/T9124, HG20625, JB/T74;
Pipe flange: JB/T74~90, HG20592~20635, ASME B16.5, DIN2543~2548, GB/T13402, API605.
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