Cla-Val CRD18 User Manual

MODEL

CRD18

Pressure Reducing Control Valve

For High Pressure Applications

• Direct Acting

• Hydraulic or Pneumatic Operation

• Simplified Design, Easy Adjustments

• Operates in Any Position

• Gauge Connection Port

The Cla-Val Model CRD18 Pressure Reducing Control automatically reduces a higher inlet
pressure to a lower outlet pressure. It is a direct acting, spring loaded,diaphragm type control
regulator that operates hydraulically or pneumatically. This valve is held open by the force of the
compression spring above the diaphragm, and closes when the downstream pressure acting on
the underside of the diaphragm exceeds the spring setting. The CRD18 senses downstream
pressure directly.

Flow through the control responds to changes in downstream pressure. Turning the adjusting
screw clockwise increases the delivery pressure, and turning it counterclockwise decreases the
pressure. A resilient disc assures tight shut-off on dead-end service.

The Model CRD18 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.

This valve is ideal as a small capacity regulator or a pilot control on a Cla-Val Automatic Control Valve.

Specifications

Size: 3/8" NPT Threaded
Materials:

Body & Cover: Cast Bronze ASTM B-62

Trim: Brass & Stainless Steel 303
Diaphragm and Seals: Buna-N

Optional Materials: Consult Factory

Temperature Range: Water: to 180°F Max.

Pressure Rating: 650 psi Max. Inlet

Adjustment Range: 150 to 600 psi

4

®

Rubber

3.12

CRD18

1. Screw, Cap Socket Head

2. Cap

3. Screw, Adjusting

4. Nut, Hex

5. Cover

6. Spring Guide

7. Spring

8. Diaphragm Washer

9. Diaphragm

10. Yoke

11. Body and Seat Assembly

12. Gasket

13. Plug (Body)

14. Disc Retainer Assembly

15. Screw, Drive

16. Nameplate

17. Plug, Pipe

18. Ball

When Ordering,
Please Specify

1. Catalog No. CRD18

2. Materials Desired

CLA-VAL

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P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

Copyright Cla-Val 2013 Printed in USA Specifications subject to change without notice.

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E-CRD18 (R-11/2013)