Denholm Valvecare Designs Unique Alternative to Bursting Disks

Published: 18th November 2014 | Issue 31

The Buckle Pin pressure relief valve offers a number of benefits over the alternatives when selecting a valve for over-pressure protection. The fast acting, safe and easy to replace valves offer a cost effective solution to a number of applications where safety relief valves are used.

The Denholm Valvecare Buckle Pin Valves are a unique range of Safety Relief Valves for over-pressure protection, predominantly sold and installed on FPSO & Flare systems – worldwide. The valve operates as the name suggests; a pin forces the valve closed, with a gas tight seal. When the set pressure is exceeded, the pin buckles and the valve safely releases the pressure, with a clean lift producing no metal shards. The valves can be reset in minutes. Other buckle pin valve applications include:
• Petrochemical Processing
• Oil & Gas exploration
• Food processing
• Pharmaceutical
• Reactor protection
• By-pass on flare staging valve
• Pump protection
• Vacuum protection
• Primary relief
• Secondary relief

They are a cost effective replacement for bursting disc applications, the technology being based on Euler’s law of compressed columns.

Design

The pin provides a clear indication of the valves “state” open or closed as the design only has two stable states straight or buckled, with the additional advantage of the mechanism being external to the process and being easy to replace. The proximity switch provides the operator with option of connecting the valve to their systems to provide a signal alerting to the valves operation.

Manufacture

By the very nature of the buckle pin design and the customer’s individual process requirements, these valves are made to order. During the design and manufacture of the BPRV stringent QA/QC procedures and processes are followed to ensure compliance with both the Customers and Denholm Valvecare requirements

Codes & Standards

The Buckling Pin Relief Valve is recognised by several International Standards, these include ASME and TUV along with the European Pressure Equipment Directive (PED)

Maintenance

The replacement of the Pin is a relatively simple task and replacement of the elastomer seals/piston seals can be accomplished is a relatively short time period.

Denholm Valvecare Limited
Tel: 01400 273370
Email: sales@denholm-valvecare.com

EnerMech Ltd