Cobham

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The Cobham Satellite Propulsion Regulator (part number B40351-1) is used to pressurize the bipropellant tanks of communications satellite propulsion systems.

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The Cobham Satellite Propulsion Regulator (part number B40351-1) is used to pressurize the bipropellant tanks of communications satellite propulsion systems. 

 

The regulator is arranged in a series redundant configuration to ensure continued system function should either of the redundant regulator pair fail open.

 

This arrangement is dictated by the application for which high operational reliability is required. This regulator is configured with metal to metal seats in both stages in order to tolerate upstream migration of N2O4 or N2H4 vapors. In the absence of such vapors, a metal to Vespel seat can be used in the upstream regulator to improve internal leakage performance.

 

Extremely good external leakage performance is achieved by employing welded closures throughout the gas flow path.  The low weight of the regulator stems from the use of a
lightweight composite helical/Belleville spring system and a machined titanium housing.

Features

Key Features

  • Series redundant
  • High performance
  • Low leakage
  • Lightweight

Specification

Product Specifications

 

Item Imperial Metric

Medium

Helium

 

Inlet Pressure

400 to 4,000 psig

(28 to 276 barg)

Outlet Pressure

232 psig

(16 barg)

Lockup Pressure

247 psig

(17 barg)

Proof Pressure

6,000 psig

(414 barg)

Burst Pressure

12,000 psig

(827 barg)

Flow

6.7 scfm

 

Internal Leakage

5.6 x 10-2 sccs

 

External Leakage

1.0 x 10-6 sccs

 

Weight

2.15 lb max

(0.98 kg)

 

Operating Environment

Item Imperial Metric

Temperature

-50 to 120 deg F

(-46 to 49 deg C)

Humidity

0 to 95%

 

Vibration

12.1 grms each axis

 
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