• UL Listed, ULC Listed, MEA Approved
• Globe or Angle Pattern
• Proven Reliable Design
• Available in Cast Bronze, Ductile Iron and Cast Steel
• Accurate Pressure Control
• In Line Service
• Grooved Ends (1-1/2” – 8”)

Cla-Val 90-21 Pressure Reducing Valves are indispensable in any fire protection system. Available in globe (90G-21) and angle patterns (90A-21), our diaphragm actuated design is proven to be highly reliable and easy to maintain. Globe and angle pattern valves feature a full range of adjustments.
These valves are also available in a variety of material
options. Epoxy coating is strongly recommended for all fire system valves (excluding bronze valves). All configurations of the valve can be supplied with optional internal and external epoxy coating of the main valve wetted surfaces.

Cla-Val 90G-21 (globe) and 90A-21 (angle) Pressure Reducing Valves automatically reduce a higher inlet pressure to a steady lower outlet pressure regardless of
changing flow rate and/or varying inlet pressure. The
valves pilot control system is very sensitive to slight downstream pressure fluctuations, and will automatically
open or close to maintain the desired pressure setting.
The downstream pressure can be set over a wide range by turning the adjustment screw on the CRD pilot control. The adjustment screw is protected by a screw on cover, which can be sealed to discourage tampering.

Underwriters Laboratories requires the installation of pressure gauges upstream and downstream of the Pressure Reducing Valve.
A relief valve of not less than 1/2 inch in size must also be installed on the downstream side of the pressure control valve. Adequate drainage for the relief valve discharge must be provided.

For sizes 18 through 36-inches, use 90-66 E-Sheet

Flow Capacity Table
Flow Rate (GPM of Water)

Optional UL Listed Materials for Seawater and Severe Service Applications:

• Nickel Aluminum Bronze (NAB) – ASTM B148 Alloy C95800
• Monel – QQ-N-288 Comp B – ASTM A494 Grade M30H
• Cast Steel – ASTM A216 Grade WCB
• 316 Stainless Steel – ASTM A743 Grades CF3M and CFM8
• Super Austenitic Stainless Steel – ASTM A351 Grade CK3MCuN (SMO 254)
• Super Duplex Stainless Steel – ASTM A890 Grade 5A (CE3MN)