Cla-Val 790-01 - Manual (Page 14)

Pressure Reducing Control Valves
CRA & CRD
MODELS
CRD
with X140-1
Security Cap Option
• Direct Acting
• Hydraulic or Pneumatic Operation
• Simplified Design, Easy Adjustments
• Operates in Any Position
• Gauge Connection Port
The Cla-Val Models CRA and CRD Pressure Reducing Control
automatically reduce a higher inlet pressure to a lower outlet
pressure. They are direct acting, spring loaded, diaphragm type
control regulators that operate hydraulically or pneumatically. These
valves are held open by the force of the compression spring above
the diaphragm, and close when the downstream pressure acting on
the underside of the diaphragm exceeds the spring setting. The CRD
senses downstream pressure directly and the CRA senses
downstream pressure remotely.
Flow through the control responds to changes in downstream
pressure. Turning the adjusting screw clockwise increases the
delivery pressure. Turning it counterclockwise decreases the
pressure. A resilient disc assures tight shut-off on dead-end service.
Models CRA and CRD may be installed in any position. There is one
inlet port and two outlets for either straight or angle installation. The
second outlet port can be used for a gauge connection.
These valves are ideal small capacity regulators for applications such
as water coolers, fountains, humidifiers, gas refrigerators, and air
supply to tools and instruments. Remote pressure sensing is
available with the CRA. They also have numerous applications as
pilot controls on many Cla-Val Automatic Control Valves.
1/8" NPT
Remote
Sensing
Connection
3.63
1.75
Max.
6.31
Max.
3/8" NPT
3.63
1.75
Max.
5.63
Max.
3/8" NPT
CRD CRA
CRA
Dimensions (In Inches)