Product Overview

The CLA-VAL 50-71: Pressure Relief - Pressure Sustaining Valve with Anti-Cavitation Kit is designed to provide dual functionality in water systems. In sustaining service, it maintains a desired upstream pressure to prevent "robbing" of pressure in upper zones, typically installed in a line between an upper zone and a lower area of heavy demand or a tank. In relief service, it protects the system or installations against high pressure surges when pumps are shut down, typically installed near the pump on a line discharging to atmosphere. This valve includes an Anti-Cavitation Kit, which reduces noise and vibration, and features 316 stainless steel trim as standard for high pressure differentials. It offers simple, reliable, and accurate operation with complete automation.

Key Benefits

• Dual Functionality: Operates effectively as both a pressure sustaining valve (maintaining minimum upstream pressure) and a pressure relief valve (dissipating excess system pressure).
• Anti-Cavitation Kit: Specifically designed to reduce noise and vibration, and handle high pressure differentials, extending valve life and system integrity.
• Superior Material: Features 316 Stainless Steel trim as standard, ensuring high resistance to corrosion and long-term durability.
• Protects Against Surges: Opens fast to dissipate excess system pressure, safeguarding installations against damaging pressure surges during pump shutdowns.
• Automatic Operation: Provides completely automatic, simple, reliable, and accurate performance without constant manual intervention.
• Quality Approved Materials: Manufactured with quality-approved materials, ensuring overall valve durability and performance.

Applications

The CLA-VAL 50-71 is a versatile valve suitable for various water distribution and pumping applications where pressure control and anti-cavitation measures are essential:

• Maintaining desired upstream pressure in lines between upper zones and areas of heavy demand or tanks (Sustaining Service).
• Protecting systems or installations against high pressure surges near pumps on discharge lines (Relief Service).
• Applications where noise and vibration reduction from cavitation are critical.

Features & Construction

• Pressure Relief Control: CRL.
• Series: CLA-VAL SERIES 50.
• Includes Anti-Cavitation Kit.
• Standard Trim Material: 316 Stainless steel.
• Designed for high pressure differentials.

Customisation Options

• Operational Enhancements:
  • LFS Option: For controlling low flows or night flows.
  • 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 the 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 Relief - Pressure Sustaining Valve with Anti-Cavitation Kit
Pressure Relief Control Model	CRL
Trim Material (Standard)	316 Stainless Steel

Installation & Maintenance

• Installation: Typically installed in a line between an upper zone and a lower area of heavy demand or a tank for sustaining service, or near a pump on a discharge line for relief service.
• Maintenance: Periodic maintenance checks are recommended. The valve's design with quality-approved materials and the anti-cavitation kit contribute to its durability and long service life, reducing ongoing maintenance requirements.