Pressure Relief Valve

Overview

Pressure Relief Valves are critical safety components in fire protection systems, specifically designed to prevent damage caused by excessive pressure in fire pump installations. These valves automatically discharge excess pressure, ensuring system stability and equipment protection.

Purpose & Function (As Provided)

Pressure relief valves are used to protect fire pump systems from overpressure conditions. Fire protection systems typically utilize diesel-driven or electrically driven fire pumps, where sudden pressure rises may occur during operation. In such systems, pressure relief valves are essential to safely release excess pressure and maintain system integrity.

System Protection Benefits (As Provided)

• Prevents pressure-related damage in diesel and electric fire pumps
• Protects piping, valves, and downstream equipment
• Enhances operational safety of fire pump systems
• Reduces maintenance and repair costs

Operating Principle

The pressure relief valve remains closed during normal operating conditions. When system pressure exceeds the preset limit, the valve opens automatically to discharge excess water, reducing pressure to a safe level. Once pressure returns to acceptable limits, the valve closes and normal operation resumes.

Connection Types (As Provided)

• Threaded
• Flanged

Input & Output Pressure Ranges (As Provided)

• Input Pressure: 175 psi – Output Adjustment: 30–165 psi
• Input Pressure: 300 psi – Output Adjustment: 30–165 psi

Technical Specifications (As Provided)

• Maximum Working Temperature: 82°C

Available Dimensions (As Provided)

• Threaded: 2” – 2½”
• Flanged: 2” – 10”

Material Features (As Provided)

• Body & Cover: ASTM A536 Nodular Cast Iron
• Valve Internal Components: Bronze surface coated with Teflon, Stainless Steel Trim Set
• Pilot Control Valve & System: Bronze ASTM B62 with Stainless Steel 303 inner parts

Application Areas (As Provided)

Pressure relief valves are used in fire protection systems equipped with diesel or electrically driven high-pressure fire pumps, where controlled pressure release is required to ensure system safety.

Approvals & Certifications (As Provided)

• FM Approved
• UL Listed
• ULc Listed

Operational Advantages

• Ensures safe operation of fire pump systems
• Automatically limits excessive pressure
• Protects system components from overpressure damage
• Improves overall fire system reliability
• Fully compliant with international fire protection standards