Safety Valve Husty 1915 DN20 3/4" 1.5 bar — pressure relief valve

The Husty 1915 DN20 3/4" 1.5 bar safety valve is a pressure relief device designed to protect boilers, hot-water systems and pressure vessels from excessive pressure. The valve has a DN20 (3/4") threaded connection and is factory-set to open at 1.5 bar, discharging excess pressure automatically to maintain system safety and integrity. It is intended for fixed-pressure protection where a reliable, repeatable release at 1.5 bar is required.

Advantages

This safety valve offers consistent opening at the specified 1.5 bar set point and a compact DN20 connection suitable for common heating and domestic hot-water installations. Its straightforward mechanical design provides automatic pressure discharge without external power, reducing the risk of overpressure-related damage. The valve’s construction supports long-term service in heating and industrial environments when installed and maintained correctly.

Suitable for

• Domestic and commercial boilers
• Hot-water storage tanks
• Central heating systems
• Closed pressure vessels requiring fixed 1.5 bar protection

Key specifications

• Nominal connection: DN20 (3/4") threaded
• Set opening pressure: 1.5 bar
• Function: automatic pressure relief
• Application: heating, hot water and general pressure systems
• Operation: mechanical spring-actuated release

How to use

Install the valve into the system at the designated safety outlet following applicable national and local installation codes. Ensure correct orientation and secure threaded connection to avoid leaks. The valve is ready for service as supplied; no electrical supply or external control is required. Periodically inspect the valve and discharge path for blockages or corrosion and test function according to relevant maintenance schedules and standards.

Usage recommendations

Use the Husty 1915 safety valve on systems designed to operate below the 1.5 bar set point and fit a discharge hose or pipe to direct released fluid to a safe location. Do not modify the set pressure or attempt unauthorized repairs; replace the valve if it fails to operate correctly or shows signs of damage. Regular inspection and compliance with local regulations will ensure reliable protection.