Gas Section - Haskel Q-Drive QGD Series Installation, Operation And Maintenance Manual

Q-Drive Installation, Operation, and Maintenance Manual
Gas Section with Cooling
Jacket and Barrel.

Gas Section

Each gas section boosts the inlet pressure independently through a common gas inlet.
The Compression Ratio (Cr) is the ratio of Outlet Pressure to Inlet Pressure. The maximum
Compression Ratio for the Q-Drive system is 5. Higher Cr increases the gas temperature, but
contribute to early failure of Piston Seals. Piston Seals are also affected by the Cycle Rate, the purity
of the gas, and the type of operation.
Tie Rods hold the components of the Gas Section together. These Tie Rods must be tightened to the
proper torque. Each Cooling Jacket has a label that shows the tightening pattern and required torque
for each tie rod.
Supply of gas
is depleting.
T0:
Temp at Inlet
Check Valve of
supply vessel
T2:
Temp at Outlet
Check Valve of
supply vessel
Adapter Piece
45kW Servo Actuator
Gas Section without
Cooling Jacket and Barrel.
Q-Drive with exposed Gas Section
Interstage Vessel (Two-Stage models
Flow of gas from supply vessel to filling vessel.
6 of 59
Drive Rod
Piston Assembly
Retainer
Plate
Gas fills the
Outlet vessel.
T1:
Temp at Outlet
Check Valve of
filling vessel
T3:
Temp at inlet
valve of filling
vessel