Differential valve for central heating FERRO ZR4 2"

FERRO ZR4 differential valve, 2" connection, is designed for central heating systems to maintain a stable pressure or flow differential between primary and secondary circuits. The valve supports hydraulic balancing and protects pumps, boilers and other system components by preventing uncontrolled pressure variations. It is suitable for domestic and light commercial installations where differential pressure control or hydraulic separation is required.

Advantages

The differential valve provides reliable control of pressure or flow differences, reducing the risk of noise, cavitation and premature wear of circulating pumps. Its robust construction ensures consistent performance in typical heating system conditions. Installation with a 2" connection simplifies integration into existing pipework and helps maintain stable operation of radiators, boilers and heat exchangers.

Suitable for

• Residential central heating systems with separate primary and secondary circuits
• Small commercial boiler rooms and hydronic installations
• Systems requiring hydraulic separation or differential pressure control to protect pumps and valves
• Retrofit projects where a 2" connection size matches existing piping

Key specifications

• Connection size: 2-inch threaded connections suitable for standard heating pipes
• Function: maintains preset pressure or flow differential between circuits
• Application: designed for central heating and hydronic systems
• Material and construction: corrosion-resistant components intended for heating system media (water/glycol mixes where compatible)
• Operating temperature: suitable for typical boiler and radiator system temperatures

How to use

Install the differential valve in the pipework between the supply (primary) and the heating distribution (secondary) circuits according to the system design and flow direction. Ensure correct orientation and tighten connections to recommended torque values for a leak-free joint. After installation, purge air from the system and set the differential pressure or flow as required by the hydraulic design. Monitor the system during initial operation and adjust settings if necessary to achieve stable pressure balance and correct pump operation.

Usage recommendations

Use the valve with fluids compatible with heating systems (treated water or approved glycol mixtures), and follow manufacturer guidelines for maximum temperature and pressure. Periodically inspect for leaks and proper operation; service or replace when wear or performance loss is detected. For system-specific settings and integration, consult a heating professional or installer to ensure correct differential settings and optimal system performance.