it features a balance-ported design and an internal check valve

It is specifically designed for Raypak commercial pool heaters

Safety Compliance: Ensures the gas valve remains closed if supply pressure drops below the 3" WC safety threshold

protecting the fan motor and assembly housing

Lennox 24W73 TXV 326070-701 it features a balance-ported designThe Lennox 24W73 is a 4 ton thermal expansion valve specifically engineered for high efficiency R 410A refrigeration and air conditioning systems. This genuine OEM Lennox TXV functions as a mission critical metering device, precisely regulating refrigerant flow to the evaporator coil to maintain optimal superheat levels. Featuring a 3 8 inch by 1 2 inch ODF connection, this valve allows for a reliable, leak resistant braze joint during installation.