USE - This control system is used for applications
requiring a convenient means for varying the applied load.
TYPICAL APPLICATIONS
- Straightening operations on a shop press.
- Press fit assembly or disassembly on shop presses or
forcing presses.
OPERATION-The pressure sensitive, manually operated
4-way valve operates as follows:
- The initial movement of the valve handle will cause the
cylinder ram to extend until contact is made with the work.
- Further movement of the valve handle will increase the
applied pressure in direct proportion to the distance through which handle
is moved. A separate adjustable relief valve limits the maximum pressure
that can be obtained.
- To retract the ram, the valve handle is moved in the
opposite direction and held until the desired return travel has occurred.
The ram will stop in position whenever the handle is released.
When a low pressure pump is included, the ram will travel at a rapid speed
determined by the combined delivery of the two pumps until the work has been
contacted. The 800 p.s.i. unloading valve will "dump" the low pressure pump at 800
p.s.i with the high pressure pump continuing to move the ram.
The pressure required to retract the ram should not exceed 800 p.s.i.
![[GFP]](../_borders/logo.gif){kind=logo}
