1/2" Pressure Relief Valve | 3 Bar | MBSP x FBSP

This 1/2" pressure relief valve gives automatic protection against excessive pressure in heating, hot water and pressurised plumbing systems. Factory-set to 3 bar, it opens when system pressure reaches the preset limit and resets as pressure returns to normal.

It features a 1/2" male BSP inlet and 1/2" female BSP outlet, suiting installations that need a male-to-female connection. The brass body, EPDM diaphragm and manual handwheel give a durable solution for system overpressure protection.

Key Features

• 1/2" male BSP x 1/2" female BSP connections
• Factory-set pressure of 3 bar
• Automatic protection against excessive system pressure
• Manual handwheel for operation and testing
• Brass valve body
• EPDM diaphragm
• Reinforced polyamide valve head
• Maximum allowable pressure of 10 bar
• Maximum working temperature of 115°C
• Suitable for water, air and compatible heating fluids
• Designed to EN 1489 requirements
• PED Category IV compliance

Typical Applications

• Central heating systems
• Domestic hot water systems
• Boilers and heating equipment
• Pressurised plumbing systems
• Water heating installations
• Heating and cooling systems
• Hot water storage systems
• General overpressure protection

Technical Specifications