Valcor Engineering Corporation

Missiles & Space Accumulators


Positive displacement hydraulic accumulators serve as self-contained sources of hydraulic pressure. Our gas-charged piston-based accumulators allow hydraulic systems to quickly respond to changes in pressure demand and can also smooth out pulsation from pumps and other cycling devices up and downstream. Using accumulators often allows for the use of smaller pumps, providing for a lower system weight and footprint. Our innovative design features a hydraulic reservoir made with proprietary composite fiber wrapping over a thin metal sleeve. This provides for pressure ratings to 3000 PSIG, while saving up to 40% of the weight found in competitive products. Dual piston seals provide for positive separation of the charging gas from the process media.


Our positive displacement hydraulic accumulators are used in hydraulic application where attenuating pulsations in line pressure is needed and can also be used as backup hydraulic power for thrust vector control (TVC) actuators.

Design Features and Benefits

  • Lightweight composite material for high strength & low weight
  • Dual seals for positive gas-fluid separation
  • Self-displacing to achieve max pressure differential
  • Self-lubricating for extended life cycling
  • Leak tight construction
  • Accessories easily added (Thermometer, pressure gauge, piston position indicator, pressure switches etc.)
  • Maintenance free bellows type accumulators

Why choose Valcor?

Valcor Engineering Corporation has been a leading manufacturer of Hydraulic Accumulators for Aircrafts, Helicopters, and Ground Vehicles for over 20 years. Valcor has demonstrated technical excellence by fully qualifying the first Maintenance Free Accumulators (MFAs) in the world for aircraft applications. Our MFAs are used on the latest version of the Navy fighter F-18 E/F.

Engineering and manufacturing piston type accumulators since the 1960s.

MFA bellows since the 1990s

Custom Application Example


Composite Bottle

  • Resistant to multiple harsh conditions
  • Shatter resistant per MIL-T-25363
  • Compatible with a variety of media
  • Contact Valcor for further configurations
  • All Systems are Custom Designed to Customer Specifications