H1FB 2-way Control Valve

The Clorius pressure balanced H1FB 2-way control valve is designed for regulating hot water, steam, hot oil etc. and can be used if a single-seated valve is required, but where the system pressure and valve size, out of regard for the pressure force of the actuator, necessitate a pressure balanced valve. The Clorius H1FB control valve is installed combined with one of our temperature regulators in control systems in domestic premises, district heating systems, industrial processes or marine installations.

Design

The valve components – spindle, seat, cone and bellows – are made of stainless steel. The bellows for balancing the pressure is fitted on the valve spindle and it reduces the power necessary for closing the valve, as the upstream pressure of the medium through the hollow valve spindle acts outside and the pressure after the valve acts inside the bellows system. The valve body is made of cast steel GP240GH (GS-C25) with connection flanges drilled according to EN 1092-1. The connection thread for the actuator is G1B ISO 228. The valves are single seated and tight closing. The leakage is less than 0.05% of full flow (see VDI/VDE 2174).

Function

Without an actuator being connected, the valve is held in an open position by means of a spring and the bellows system. With pressure on the spindle, the valve will close. In connection with our thermostats, the valves will close at rising temperatures. For cooling circuits, the valve can be used in conjunction with a reverse acting electric actuator. Alternatively, a reverse acting valve can be used with our self-acting thermostats. The quadratic characteristic will not cease until the flow has dropped below 4% of the full flow.