AVG PLV15C-Triset-LF 350/500/600kPa Pressure Limiting Valve 15mm Male Compression

Overview

The AVG PLV15C-Triset-LF 15mm (1/2”) PLV pressure limiting valve incorporates three selectable pressure settings of 350, 500 and 600kPa all within one compact valve. The Tri-set PLV is preset at 500kPa by factory default and can be set to 350kPa and 600kPa by turning the adjustment screw by the supplied Allen key. Once the new pressure is set, a colour coded plastic clip may be fitted to indicate the valve’s new pressure setting.

When the triset PLV is set at 500kpa and 600kPa, it is commonly used to regulate the supply cold water pressure to hot water services including heat pumps, electric, gas storage and solar water heaters across all mainstream brands in Australia such as Rheem, Vulcan, Rinnal, Dux, Aquamax, Thermann, Apricus and Solahart. When the pressure is set at 350kPa, the triset PLV can be used with caravans, tiny homes and small appliances such as coffee machines, dish washers, washing machines and water fountains.

The PLV pressure limiting valve regulates the inlet water pressure by employing a sliding piston design internally and creates a pressure drop as the water passes through the valve. This piston design is directional and therefore there is an arrow on each pressure limiting valve body indicating the water flow orientation.  

Engineer's Notes

When a PLV pressure limiting valve fails, it is usually caused by the corrosion and debris clogging-up inside the valve body, preventing the piston's sliding actions over its usage life spans. In most cases, the water pressure and flow rate can drop significantly causing an unsatisfying user experience. In less common scenarios, the opposite can also happen and the pressure limiting valve may lose its pressure limiting ability, potentially blowing up appliances with over pressures. 

A PLV pressure limiting valve can only limit the dynamic pressure of the passing inlet water. The valve cannot regulate a static pressure increase inside a water heater when the water heats up and expands, where PTR and ECV valves must be used instead for the pressure relief.

The 350/500/600kPa is a nominal outlet pressure rating under Australian Watermark Standard testing condition with a set inlet pressure. In real world situations, the actual mains supply water pressure can fluctuate and vary greatly from locations to locations. This presents a challenge for the pressure limiting valves, which fail to limit pressure sufficiently if the mains supply pressure is too high; yet cannot allow enough pressure if the mains supply pressure is too low. In such situations, pressure reducing valves can be used in the places of the pressure limiting valves to address this problem, as they allow fine adjustment until the desire outlet pressure is achieved.

Technical Detail

• Brand: AVG
• Model: PLV15C-Triset-LF
• Flow Rate: 50 L/min @ 350kPa; 80 L/min @ 500kPa; 90 L/min @ 600kPa
• Max Inlet Pressure: 1800kPa
• Maximum Operating Temperature: 80°C
• Thread Size: 1/2" BSP (15mm) Male Compression
• Thread Size Physical Measurement: 20.995mm external thread diameter with the compression cone nuts removed (refer to the BSP sizing chart in the photo gallery); Copper Olives and Cone nuts to connect to standard DN15 copper pipe
• Material: Lead Free DR Brass
• Features: Adjustment tool and indicating rings included; factory set at 500kPa
• SKU: PLV15C-Triset-LF

Package Contents

• AVG PLV15C-Triset-LF Pressure Limiting Valve
• Package Weight: 420g