Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual

 

30 HFG2.0 

USER 

GUIDE

 

 

 Note: The MCE analog and discrete signal interfaces are 

electrically isolated. The serial communication interface is 
optically isolated 

  

The HFG2.0 consists of two main parts, an actuator and a valve 
assembly. 

 

The actuator is the primary drive mechanism for the valve assembly. The 
actuator portion of the HFG2.0 consists of four main assemblies: 

•  Main Housing Assembly 
•  Brushless DC Motor Assembly 
• Resolver 

Assembly 

• Linear 

Drive 

Mechanism 

 

The main housing assembly consists of the main housing, motor cover, 
extension-rod bearing, and associated seals. The main housing assembly 
is the primary structural system component and supports all the bearings, 
motor cover, mountings, and connectors. It also provides explosion-proof 
containment. 

The housing is fitted with a stainless steel liner to provide thermal and 
dimensional stability for the main bearing. This liner is permanently 
installed into the aluminum main housing. A retaining ring is included for 
redundant retention. 

The main housing also contains rigid mechanical stops to prevent 
extension rod travel beyond the design specification. See Figure 2-2. 

A brushless DC motor powers the HFG2.0 linear drive mechanism. The 
DC motor consists of a stator and rotor. See Figure 2-2. 

The motor stator is attached to the main housing by a pre-loaded wave 
spring and screws. Thermistors are embedded in the stator windings to