Product Overview

The CLA-VAL 52-03R: Surge Anticipator and Pressure Relief Valve with Reverse Flow Control is designed to provide comprehensive protection in pumping systems, typically installed near a pump on a discharge line to a tank. It effectively anticipates and diverts dangerous pressure surges caused by abrupt pump shutdowns (e.g., due to power failure) by opening on the low pressure wave and fully diverting excess pressure on the returning high wave. A key distinguishing feature is its ability to allow reverse flow if upstream pressure falls under atmospheric pressure. This valve also functions as a sustaining valve, maintaining a minimum preset inlet pressure, and as a relief valve that opens fast to dissipate excess system pressure. It offers simple, reliable, and accurate operation with complete automation.

Key Benefits

• Proactive Surge Protection: Anticipates and diverts dangerous pressure surges during abrupt pump shutdowns, protecting systems from severe equipment damage.
• Unique Reverse Flow Control: Allows reverse flow when upstream pressure falls under atmospheric pressure, adding a specific layer of system safety and control.
• Dual Pressure Control: Operates as both a fast-opening pressure relief valve (dissipating excess system pressure) and a pressure sustaining valve (maintaining minimum preset inlet pressure).
• 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 52-03R is a critical component for pumping systems requiring advanced surge protection, pressure management, and specific reverse flow capabilities:

• Installation near a pump on a discharge line to a tank for surge anticipation and relief.
• Protecting systems against high pressure surges during pump shutdowns, including power failures.
• Applications where controlled reverse flow under specific pressure conditions (e.g., falling to atmospheric pressure) is essential.

Features & Construction

• Pressure Relief Control: CRL.
• Pressure Reducing Control: CRA.
• Check Valve: CDC-1.
• Series: CLA-VAL SERIES 50.
• Anticipates surge by opening on low pressure wave.
• Diverts excess pressure by being fully open on returning high wave.
• Allows reverse flow if upstream pressure falls under atmospheric 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 the valve or remove excessive system overpressures.
• Corrosion Protection: Possibility to protect the valve with upgraded materials.
• Recommended Assembly: Can be combined with a Pump Control Valve (CLA-VAL 60-31/02) and a Sensing line for optimal regulation.

Technical Specifications

Specification	Value
Series	CLA-VAL SERIES 50
Function	Surge Anticipator and Pressure Relief Valve with Reverse Flow Control
Pressure Relief Control Model	CRL
Pressure Reducing Control Model	CRA
Check Valve Model	CDC-1

Installation & Maintenance

• Installation: Typically installed near a pump on a discharge line to a tank. Its strategic placement allows it to anticipate and divert dangerous surges during abrupt pump shutdowns.
• 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.