Product Overview

The CLA-VAL 51-01: Pressure Sustaining Valve with Non-Return Feature is designed to perform multiple critical functions in water systems. In sustaining service, it maintains desired upstream pressure in a line between an upper zone and a lower area of heavy demand or a tank. When installed near pumps, the valve provides protection against surges and dissipates excess pressure. Additionally, it features a non-return capability, where a built-in check valve prevents backflow when a pressure reversal occurs, such as when a pipe line links two separate distribution systems and upstream pressure drops. This valve offers a simple, reliable, and accurate solution with completely automatic operation.

Key Benefits

• Dual Control & Protection: Functions as both a pressure sustaining valve (maintaining upstream pressure) and a relief valve (dissipating excess pressure) while actively preventing backflow.
• Surge Protection: Provides essential protection against damaging pressure surges when installed near pumps.
• Backflow Prevention: Equipped with a check valve (CDC-1) that prevents reverse flow during pressure reversals, enhancing system integrity.
• Automatic & Reliable: Offers completely automatic, simple, reliable, and accurate operation, ensuring consistent performance.
• Quality Approved Materials: Manufactured with quality-approved materials, ensuring durability and long service life.

Applications

The CLA-VAL 51-01 is a versatile valve suitable for various water distribution and pumping applications where pressure maintenance, surge protection, and backflow prevention are crucial:

• Maintaining upstream pressure in lines between zones of varying demand.
• Protecting pumping systems from pressure surges on discharge lines.
• Preventing backflow in pipelines linking separate distribution systems.

Features & Construction

• Check Valve: CDC-1.
• Pressure Relief Control: CRL.
• Series: CLA-VAL SERIES 50.
• Functions as a pressure sustaining valve.
• Functions as a pressure relief valve, opening fast to dissipate excess system pressure.

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 the 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 50
Function	Pressure Sustaining Valve with Non-Return Feature
Check Valve Model	CDC-1
Pressure Relief Control Model	CRL

Installation & Maintenance

• Installation: Typically installed in a line between an upper zone and a lower area of heavy demand to maintain upstream pressure. When installed near pumps, it provides surge protection. For pipelines linking separate distribution systems, it prevents backflow during pressure drops.
• Maintenance: Periodic maintenance checks are recommended. The valve's robust design and quality-approved materials contribute to its durability and long service life, reducing ongoing maintenance requirements.