Self-operated Pressure Regulators Proportional Safety Valve Type 2302 Application Valve used to maintain the water pressure in heating installations, especially when connected to a district heating system · Set points from 3.5 bar to 11 bar · Nominal inlet size DN 20 and nominal outlet size DN 25 · Nominal pressure PN 16 · Suitable for temperatures up to 150 °C The valve opens when the upstream pressure rises above the response pressure The direct-acting, spring-loaded safety valve contains a metal bellows and is characterized by its proportional opening and closing behavior. It has therefore been defined as a Safety Valve in accordance with DIN EN 764 and AD Merkblatt A2. Special features • High responsiveness and low closing pressure achieved by an operating element with a large effective area • Operating element (metal bellows) made of stainless steel • Internal set point springs that do not come into contact with the process medium Versions Type 2302 Proportional Safety Valve (Fig. 1) · Nominal pressure PN 16 · Inlet port with welding end in DN 20 (special threaded end or flange) · Outlet port with female thread G 1 and male thread G 1¼, optionally fitted with welding end, threaded end, soldered end or flange in DN 25 or G 1 · Set point ranges: 3.5 bar to 5.5 bar, 5 bar to 7.5 bar or 6 bar to 11 bar. Fig. 1 · Type 2302 Proportional Safety Valve Special version: lead-sealed set point adjustment 7 6 Principle of operation (Fig. 2) The process medium flows through the valve in the direction indicated by the arrow. The pressure of the process medium is applied to the effective area of the metal bellows (3). The force resulting from the liquid pressure p multiplied by the bellows area A is balanced by the closing force of the springs (4), determining the regulating pressure. This pressure can be adjusted by altering the spring compression by means of the set point adjustment (5). If the liquid pressure exceeds the adjusted pressure, the valve opens until the adjusted pressure is reached again and the seat and plug tightly close. The valve is relieved of pressure by turning the nut (6) against the set point adjustment (5), causing the pipe to vent. Associated Information Sheet

Table 1 • Technical data ■ All ^ pressures in bar (gauge) Typetesting The safety valve has been typetested by the German Technical Inspectorate (TUV) in accordance with the VdTUV Specification Sheet "Safety Valve 100". Type markings available on request. Ordering text Proportional Safety Valve Type 2302 Inlet port: Welding end Outlet port: Welding end, threaded end, soldered end/ flange Set point range ... bar Optionally adjusted/lead-sealed to ... bar Optional special version Installation - The safety valve must be located in the flow pipe of the heating or district heating system (pressure...