N53C Seal
N35C Cutaway
Product Brand
Seal Systems
Accumulators - Piston
About this product

The N53C piston accumulator from Flowserve provides optimal lubrication for dual pressurized mechanical seals to promote long seal life and equipment reliability across a broad range of applications. It’s designed to be easy to install, simple to operate, and requires minimal maintenance.

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  • A spring-energized piston maintains a minimum pressure to the dual mechanical seal when the equipment is idle.
  • When the equipment starts and pressure builds in the seal chamber, a reference line from the seal chamber enables the N53C piston accumulator to boost the pressure to the dual mechanical seal and establish the required pressure differential.
  • The N53C piston accumulator will always maintain a positive pressure differential for proper operation of the dual mechanical seal.



  • API Standard 682 (4th Edition)
  • ASME B31.3
  • Pressure Equipment Directive (PED) 2014/68/EU
  • CSA B51

Operating Parameters

  • Maximal working temperature: 82 °C (177 °F) Limited by clamp gasket material
  • Minimum operating temperature: -17 °C (1.4 °F)
  • Maximal Working Pressure: 40 BarG (580 PSIG)

Size Range: 1.4 U.S. Gallon (5 Litter)

Materials: 316 stainless steel wetted parts


  • NPT

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