Back Pressure Regulating Valve 22M | Cla-Val

Cla-Val 22M Back Pressure Regulating Valve

The Cla-Val 22M is a back pressure regulating valve designed for marine and industrial water systems. Its primary function is to control upstream pressure to ensure adequate supply pressure is maintained in the upstream circuit. Product documentation classifies it as a Back Pressure Regulating Valve for maintaining upstream pressure and stable fluid delivery.

Operation

Unlike a pressure reducing valve, the 22M does not regulate downstream pressure. It maintains a preset upstream pressure and opens only when the upstream pressure exceeds the setpoint. This makes it suitable as a pressure sustaining or back pressure control device in circuits where upstream pressure drops can impact supply or equipment operation.

Technical Classification

• Type: Back Pressure Regulating Valve
• Function: Upstream pressure control
• Typical application: Air conditioning and chilled water systems – fresh water
• Connections: Union MIL-F1183 or flanged
• Flange specification: MIL-F20042 Class 150 or ASA Class 150 B16.24 as applicable
• Catalog sizes: 1/2", 3/4", 1", 1 1/4", 2" for union; 1 1/2", 2", 2 1/2" for flanged versions

Selection Criteria

Selection should be based on upstream set pressure, available differential pressure, minimum and maximum flow, connection type, chilled water temperature, and media cleanliness. For retrofit, verify face-to-face dimensions, pilot circuit accessibility, and isolation capability for adjustment.

Maintenance

Periodic inspection includes pilot lines, strainers, diaphragm, seat, internal ports, and verification of set pressure under actual flow. In chilled water with deposits or corrosion products, cleaning of small control passages is required.

FAQ

Does it regulate downstream pressure?
No. Its primary function is to maintain upstream pressure.

Is it suitable for seawater?
The catalog version is specified for fresh chilled water. For seawater, material and elastomer compatibility must be confirmed.