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Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure

Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure
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Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure - 1

Self-operated Pressure Regulators pilot-operated by the medium Pressure Reducing Valve Type 2333 A with pilot valve Excess Pressure Valve Type 2335 A with pilot valve Application Pressure regulators for set points from 1 bar to 28 bar ⋅ Valve sizes DN 125 to DN 250 ⋅ Nominal pressures PN 16 to PN 40 ⋅ For steam1) up to 350 oC ⋅ With flanges Type 2333 A: Valve closes when the downstream pressure rises Type 2335 A: Valve opens when the upstream pressure rises Special features • Low-maintenance proportional regulators; pilot-operated by the medium • Type 2422 Globe Valve with Type 2420 Actuator • High dynamic response and small offset, meaning high control accuracy due to the attached pilot valve • Easy set point adjustment on the pilot valve • Fully balanced, single-seated globe valve with flanges The medium pressure is used as the auxiliary energy to operate the regulator. To open the valve, the differential pressure must be at least as high as the minimum Δpmin value specified in Table 1. The attached pilot valve, either a pressure reducing valve or an excess pressure valve, determines the regulators function. Versions Pressure Reducing Valve or Excess Pressure Valve consisting of: Type 2422 Single-seated Globe Valve ⋅ Body manufactured of either gray cast iron, spheroidal graphite iron or cast steel ⋅ Type 2420 Actuator with EPDM rolling diaphragm having an effective diaphragm area of A = 640 cm2 ⋅ Pilot valve (PV), suitable for the medium regulated, with strainer, equalizing tanks and needle valve. Type 2333 A ⋅ Pressure Reducing Valve (Fig. 1) for steam For regulating the downstream pressure p2 to the set point adjusted on the pilot valve. The valve closes when the downstream pressure rises. The standard version includes a Type 44-0 PV or optionally a Type 41-23 PV. Type 2335 A ⋅ Excess Pressure Valve for steam For regulating the upstream pressure p1 to the set point adjusted on the pilot valve. The valve opens when the upstream pressure rises. The standard version includes a Type 44-6 PV (modified) or optionally a Type 41-73 PV. Special versions ANSI version JIS version With flow divider for noise reduction Fig. 1 ⋅ Type 2333 A ⋅ Pressure Reducing Valve, DN 150 with Type 44-0 PV Higher pressure ratings Higher set point ranges Higher permissible temperature With tandem actuator to reduce the minimum required differential pressure Δpmin With overstroke actuator to increase the standard KVS value Additionally with 2/2-way solenoid valve for emergency operation via remote control 1) Optionally also available for air and liquids Associated Information Sheet

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Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure - 2

Principle of operation The medium flows through the fully balanced globe valve (1) in the direction indicated by the arrow. The position of the valve plug influences the flow across the free area between the plug (3) and seat (2). The internally generated control pressure ps is used to control the valve. Depending on the error signal, this pressure is available between the PV (10) and the needle valve (9) and is transferred to the operating diaphragm (7) of the actuator (6). For safe operation of the valve, either as pressure reducing or excess pressure valve, the minimum differential...

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Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure - 3

Table 1 a - All pressures in bar (gauge) ^ For higher requirements: Metal sealing up to a temperature of max. 350 °C

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Self-operated Pressure Regulators · Pilot-operated by the process medium · Type 2333 A Pressure - 4

Type 2333 A Pressure Reducing Valve Type 2335 A Excess Pressure Valve 'i +10% for cast steel PN 25 and spheroidal graphite iron GGG-40.3 PN 25 Ordering text Pressure Reducing Valve Type 2333 A / Excess Pressure Valve Type 2335 A DN ... Body ... PN ... Set point range ... bar Optional special version ... Specifications subject to change without notice.

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