Product Overview

The CLA-VAL 91-01: Pressure Reducing Valve with Non-Return Feature is designed to reduce a high inlet pressure (P1) 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 system pressure (P1) drops. It also provides essential check features for feeding lines to high-rise buildings, preventing reverse flow. As part of the CLA-VAL SERIES 90, it accurately reduces a higher inlet pressure to a constant downstream pressure (Pressure Reducing Control) regardless of changing flow rate or varying inlet pressure. It offers simple, reliable, and accurate operation with complete automation.

Key Benefits

• Dual Control Functionality: Simultaneously reduces high inlet pressure to a constant downstream pressure and prevents backflow during pressure reversals.
• Backflow Prevention: Equipped with a Check Valve (CDC-1) that effectively prevents reverse flow, especially in pipelines linking separate distribution systems and feeding lines to high-rise buildings.
• Accurate Pressure Reduction: Accurately reduces a higher inlet pressure to a steady lower downstream pressure, ensuring precise control.
• Automatic Operation: Provides completely automatic, simple, reliable, and accurate performance without constant manual intervention.
• Quality Approved Materials: Manufactured with quality-approved materials, ensuring durability and long service life.

Applications

The CLA-VAL 91-01 is suitable for critical water distribution applications requiring precise pressure reduction and robust backflow prevention:

• Pipelines linking two separate distribution systems to prevent backflow.
• Feeding lines to high-rise buildings to ensure one-way flow.
• Any system where high inlet pressure needs to be reduced and reverse flow must be prevented.

Features & Construction

• Check Valve: CDC-1.
• Pressure Reducing Control: CRD.
• Series: CLA-VAL SERIES 90.

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: Use stem cleaning for harsh water.
• 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.
• 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 90
Model	91-01
Function	Pressure Reducing Valve with Non-Return Feature
Check Valve Model	CDC-1
Pressure Reducing Control Model	CRD
Sizes Available	(Not explicitly mentioned in this datasheet, refer to main series documentation if available)

Installation & Maintenance

• Installation: The CLA-VAL 91-01 is designed for installation on pipelines linking separate distribution systems and feeding lines to high-rise buildings to prevent backflow. It reduces a high inlet pressure to a constant downstream pressure.
• Maintenance: Periodic maintenance checks are recommended. The valve's robust design and quality-approved materials contribute to its durability and long service life.