Operation - Ransburg DR-1 Service Manual

EN

OPERATION

The DR-1 Regulator is designed to provide remote control
fluid regulation for automatic coating applications.
The regulator features two independently controllable flow
pressure ranges from the fluid output port. The high flow
range port accom-modates higher fluid deliveries and min-
imal color change times. The lower flow ranges provide
precise fluid delivery control. There are seven lower range
models available (1:1, 1:2, 1:3, 1:4, 1:6, 1:8, and 1:10)
which can be selected based on the required fluid flow rate.
Separate pilot signals modulate each of the regu-lator's two
diaphragms to control the amount of paint being delivered
from the regulator to the spray applicator.
Because of the regulator's dual range capabilities, it provides
the user flexibility for selecting either the high flow range or
the low flow range. Different coating material viscosities
and quick color change requirements may necessitate the
use of both ranges. If color change time is not a factor or
if material viscosity remains relatively constant, either port
may be used depending on flow rate requirements. All
regulators, regardless of ratio designation, have the high
flow port.
The low flow (i.e. 1:2, 1:4, etc.) port provides a lower, more
precise flow response curve. Fluid output, as a result, is
less likely to be affected by pilot signal errors. An increase
in the ratio (i.e. from 1:2 to 1:4) provides a lower slope in the
flow/air signal pressure curve, but a more precise response
curve. This same increase in ratio however, will reduce
flow capacity and should be considered when selecting
the proper regulator ratio.
LN-9223-00-R12 (04/2018)
The following factors must then be considered when se-
lecting the regulator ratio required for proper fluid control:
• Fluid tubing inside diameter (ID) and length
• Fluid feed tube inside diameter (ID) and length
• Fluid viscosity
• Fluid input pressures
Preliminary testing will determine which regulator ratio
should be used. If conditions change after installation
which require a different low flow ratio, this regulator can
be easily altered by replacing the existing ratio spacer ring
and upper retainer with the desired ratio (ratio designation
is etched on the side of the spacer ring).
!
† NEVER wrap the applicator, associated valves
and tubing, and supporting hardware in plastic to
keep it clean. A surface charge may build up on the
plastic surface and discharge to the nearest grounded
object. Efficiency of the applicator will also be reduced
and damage or failure of the applicator components
may occur. WRAPPING THESE COMPONENTS IN
PLASTIC WILL VOID WARRANTY.
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OPERATION
WA R N I N G
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