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SB Pressure Relief Valve

SB Pressure Relief ValveConcept

The Pressure Relief Valve is used for minimizing the risk of damage to tanks due to liquid overfilling.

Working principle

The Pressure Relief Valve is delivered with counter weight set and locked to suit customer requirements regarding opening pressure. When pressure in the tank exceeds the preset opening value, the valve relieves the excess pressure.

Standard Design

The Pressure Relief Valve is available in two versions:

• Integrated in a SCANDI BREW® tank top system
• Mounted on its own counter flange

Compliance to PED 97/23/EC of the European Community
Compliance to EN 4126-1
Compliance to EN 764-7

The advantages of an integrated Pressure Relief Valve are lower initial costs, superior hygiene and smaller area required for the valve. The size and setting of the Pressure Relief Valve is based on the tank design data and process requirements. The preset opening pressure must be above tank working pressure: 0,1 bar above for working pressures < 1 bar and 10% above for working pressures >1 bar. The Pressure Relief Valve should be seated horizontally. An inclination of max. 10° is acceptable but the lever arm must then point in to the centre of the cylindro-conical tank top.

Documentation

How It Works

Construction

The Alfa Laval SB Pressure Relief Valve is a dead weight safety valve. It is compliant with PED 97/23/EC, EN 4126-1 and EN 764-7 and is available in two versions:

• Integrated with a SCANDI BREW® tank top system

• Mounted on its own counter flange

Operating principle

The pressure relief valve is delivered with the counterweight set and locked at the preset pressure that meets the customer’s requirements for opening pressure. When pressure in the tank exceeds the preset opening value, the valve relieves the excess pressure.

The preset opening pressure must be set at a value that is above the tank working pressure: 0.1 bar above for working pressures < 1 bar, and 10% above for working pressures >1 bar. The valve should be seated horizontally. A maximum inclination of 10° is acceptable, but the lever arm must then point inward toward the centre of the cylindroconical tank top.

Cleaning-in-Place (CIP)

The valve is cleaned in closed position by the tank cleaning head. However, this does not include cleaning of the valve seat. To include the valve seat as an integral part of the cleaning cycle, an optional pneumatic force opener and optional splash guard are available.

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