Introduction

4-Way reversing valves are used in air-conditioning reverse cycle and heatpump systems to change the refrigerants direction of flow. By changing the refrigerants direction of flow the evaporator can become the condenser (the indoor coil) and the condenser can become the evaporator (the outdoor coil). This will lead to heat being rejected inside for heating (in winter) or outside for cooling (in summer).

The cycle inversion is initiated by a small pilot solenoid valve that directs pressure to either end of the valve body forcing a piston and sliding valve to change ends altering the internal port configuration and reversing the flow direction of the refrigerant in the system. Due to the large port design of Heldon valves the changeover happens almost instantaneously with a minimal pressure differential, pressure drop and risk of internal leakage.

Heldon 4-way reversing valves are constructed from corrosion resistant brass with solid copper connectors and pilot tubes. Available in capacities from 4 to 45kw with a maximum safe working pressure of 4100kpa for most models making those versions suitable for R-410A.

Features

Designed for maximum flow and minimal
pressure drop.
Brass construction
Solid copper extended connectors.
Suitable for all fluorinated refrigerants up to 4100kpa.(Most models)
Wear resistant seals.
Working range  -20°C to 50°C Ambient
High capacity pilot valve and tubes.

Benefits

Negligible loss in system efficiency.
Strong stable platform.
Easy installation and soldering.
Compatible will most fluorinated refrigerants and Oils.
Longer reliable working life.
Suitable for a wide range of applications.
Reduced chance of a blockage.