20mm Two-Step Bare Dual Solenoid Valve

The Hansen HS4D Two Step Solenoid Valve is based on the same strength, reliability, design principles and craftsmanship as the standard Hansen HS4A Solenoid Valve with added versatility. The two step solenoid design provides three positions for the valve: fully closed, partially open (10% rated flow), and fully open. These valves are normally closed and will revert to the closed position in the event of a power failure.

The valve can be opened via the manual opening stem for pump-out during maintenance. Similar to the standard HS4A, the HS4D is superior in its ability to overcome dirt and sticky oil during opening, as well as function in an oil-free (dry) system. The HS4D can also be used as a suction solenoid and equalizing valve. After the conclusion of defrost, the partially open valve position can equalize (bleed) gas from the evaporator. After proper bleed time, the valve can be placed in the Fully Open position.

Available sizes range from 20mm to 100mm and come as a bare valve. Flanges, strainers and solenoid coild are not included with this product and as such, will need to be purchased separately.