1. The 4RHH2 is a heavy-duty valve used in heat transfer applications such as chillers, boilers and solar thermal systems. It is designed with a steel body and brass internals, making it resistant to corrosion, abrasion and vibration. The valve has a dual-seal design that helps to control the flow of high temperatures or hot gases.
2. The 4RHH2 features a two-way flow that can be switched between closed, open, close-and-hold, normal and reverse positions. The valve body includes a large seat disc that helps to reduce the wear of moving parts, and the seat has a large diameter that helps to regulate the flow rate.
3. To ensure the valve's proper functioning, it is designed with a pressure test connection that allows for regular inspection of the internal components. It is also designed with an aluminum-bronze valve stem and a stainless steel stem guide bushing that helps to reduce the wear of the stem, allowing it to be used for longer.
4. The 4RHH2 is designed for temperatures up to 450°F and pressures up to 250 PSI. It is UL, CSA and CE certified for safety, and it is an API 6D certified valve. It is also constructed with an NACE MR0175 compliant construction material.