Product Overview

The CLA-VAL 41-01 Flow Control Valve with Non-Return Feature is designed to limit flow to a preselected maximum, and crucially, to prevent backflow through the valve when a pressure reversal occurs (P2>P1). This valve is typically installed on pipelines linking two separate distribution systems to avoid backflow when upstream pressure drops. It also provides essential check features for feeding lines to high-rise buildings. Part of the CLA-VAL SERIES 40, it accurately limits excessive flow to a preselected maximum rate (Flow Control) regardless of changes in pressure or varying inlet flow. It offers simple, reliable, and accurate operation with complete automation.

Key Benefits

• Dual Functionality: Limits flow to a preselected maximum and simultaneously prevents backflow when pressure reversal occurs.
• Protects Distribution Systems: Ideal for pipelines linking separate distribution systems, effectively avoiding backflow when upstream pressure drops.
• Ensures High-Rise Building Safety: Provides critical check features for feeding lines to high-rise buildings, preventing reverse flow.
• Accurate Flow Limitation: Accurately limits excessive flow to a preselected maximum rate, ensuring consistent performance regardless of pressure or flow variations.
• Automatic Operation: Features completely automatic operation, offering a simple, reliable, and accurate solution for flow control.
• Quality Approved Materials: Manufactured with quality-approved materials for durability and long service life.

Applications

The CLA-VAL 41-01 Flow Control Valve with Non-Return Feature is critical for systems requiring precise flow limitation and backflow prevention:

• Pipelines linking two separate distribution systems.
• Feeding lines to high-rise buildings.
• Any system where limiting flow to a maximum and preventing reverse flow are necessary.

Features & Construction

• Includes a Check Valve (CDC-1).
• Flow Control: CDHS-18.
• Orifice Plate Assembly: X52-A (included).

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 your valve or remove excessive system overpressures.
• Corrosion Protection: Possibility to protect your valve with upgraded materials for enhanced corrosion resistance.
• Recommended Assembly: Can be combined with an H-Strainer AQUA 90-501 and "anti-shock" air release & vacuum break valve AQUA 70-516 for optimal regulation.

Technical Specifications

Specification	Value
Series	CLA-VAL SERIES 40
Function	Flow Control Valve with Non-Return Feature
Check Valve Model	CDC-1
Flow Control Model	CDHS-18
Orifice Plate Assembly	X52-A (Included)

Installation & Maintenance

• Installation: The Orifice Plate Assembly may be fixed directly to the main valve outlet flange, but better control is obtained if it is installed in stabilized flow conditions downstream of the valve. The Float Control may be installed at any elevation, provided P1 (expressed in length) > D (depth).
• Maintenance: Periodic maintenance checks are recommended. The valve's design with quality-approved materials contributes to its durability and long service life.