Product Overview

The CLA-VAL 40-CF9: Flow Control Valve with On/Off Level Control is designed to fill up a tank at a constant flow rate, effectively preventing the drop of flow in an upper zone. This valve opens (On) when the liquid level reaches a preset low level and closes drip tight (Off) when the level reaches a preset high level. An orifice plate, mounted on the outlet of the valve, controls the flow rate and simultaneously prevents any cavitation. As part of the CLA-VAL SERIES 40, it is used to accurately limit excessive flow to a preselected maximum rate (Flow Control) regardless of changes in pressure or varying inlet flow, providing a simple, reliable, and accurate solution with completely automatic operation.

Key Benefits

• Automated Level Control: Automatically opens when liquid level is low and closes drip-tight when a high level is reached, ensuring precise tank filling.
• Constant Flow Rate: Designed to fill tanks at a constant flow rate, preventing disruptions to flow in upper zones.
• Cavitation Prevention: Includes an orifice plate assembly that controls flow rate and effectively prevents cavitation, protecting the system.
• Accurate Flow Limitation: Accurately limits excessive flow to a preselected maximum rate, irrespective of pressure changes or varying inlet flow.
• Simple & Reliable Operation: Offers completely automatic operation with easy adjustment and maintenance, making it a dependable solution.
• Quality Approved Materials: Manufactured with quality-approved materials for durability and long service life.

Applications

The CLA-VAL 40-CF9 Flow Control Valve with On/Off Level Control is ideal for tank filling and level management applications, including:

• Filling tanks at a constant flow rate in water distribution systems.
• Preventing flow drop in upper zones.
• Applications requiring automatic control of liquid levels in closed reservoirs.

Features & Construction

• Flow Control: CDHS-2BP.
• 2-Way On/Off Level Control: CF9.
• Includes Orifice Plate Assembly: X52-A.
• Maintains constant flow rate.
• Closes drip tight when preset high level is reached.

Customisation Options

• Operational Enhancements:
  • LFS Option: For controlling low flows or night flows.
  • KO Option: To extend valve life with Anti-Cavitation trim.
  • KG1 Option: For stem cleaning in harsh water conditions.
• Maintenance & Monitoring:
  • Option to check on periodic maintenance.
• Environmental Adaptability: Options to adapt to high temperatures or frost risk.
• Security & Protection: Options to add hydraulic safety back-up to the valve or remove excessive system overpressures.
• Corrosion Protection: Options to protect the valve with upgraded materials.
• Recommended Assembly: Can be combined with an H-Strainer AQUA 90-501 and a float stilling well for optimal regulation.

Technical Specifications

Specification	Value
Series	CLA-VAL SERIES 40
Function	Flow Control Valve with On/Off Level Control
Flow Control	CDHS-2BP
Level Control	2-Way On/Off (CF9)
Orifice Plate Assembly	X52-A (Included)
Connecting Pipe Internal Diameter	20 mm
Connecting Pipe Slope	min. 2%

Installation & Maintenance

• Installation: The Float Control may be installed at any elevation, provided P1 (pressure expressed in length) > D (depth). The connecting pipe has a minimum diameter of 20mm and a minimum slope of 2%. The valve can be used in stabilized flow conditions downstream of the valve for better control if the orifice plate assembly is installed there.
• Maintenance: Maintenance aspects can be periodically checked. The design is intended for longevity with quality-approved materials and built-in cavitation prevention.