RP45_2023
8Pages

Catalog excerpts

ADCA PRESSURE REDUCING VALVES RP45 (Threaded) DESCRIPTION The ADCA RP45 series of pressure reducing valves are single seated, bellows sealed controllers that operate without auxiliary energy. Designed for use with steam, compressed air, and other gases compatible with the construction. These valves are particularly suitable for reducing steam pressure in all energy and process systems where pressures must be kept under control. MAIN FEATURES Specially designed high durability bellows, providing pressure balancing and frictionless plug stem. Robust construction (fit-and-forget). Suitable for use with high pressure turndowns. Interchangeable actuators and adjustment springs. OPTIONS: Soft sealing in PTFE/GR for use with steam. Soft sealing in nitrile rubber for use with air and gases. Sensing pipe on body. Steam, compressed air and other gases compatible with the construction. Limited use with liquids. Consult manufacturer before installing the valve with liquids. AVAILABLE MODELS: RP45S and RP45ST or N – carbon steel. RP45i and RP45iT or N – stainless steel. Suffix T: soft sealed with PTFE/GR. Suffix N: soft sealed with nitrile rubber. AVAILABLE ACTUATORS: RP45 with sensing pipe on body CE MARKING – GROUP 2 (PED – European Directive) PN 40 VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA LIMITING CONDITIONS Valve model Body design conditions Maximum upstream pressure Maximum downstream pressure Minimum downstream pressure Maximum operating temperature Maximum reducing ratio Rangeability Maximum hydraulic factory valve body test Remark: Other soft materials and temperature limits on request. Actuator model Maximum operating pressure (bar) Maximum operating temperature * A water seal pot must be installed in the sensing pipe when operating with steam. FLOW RATE COEFFICIENTS (m³/h) SIZE SATURATED STEAM CAPACITY TABLE (kg/h) SIZE INLET (barg) Remark: For pressure ratios...

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ADCA CORRECTION FACTORS Pressure ratio: The capacities given in the “Saturated steam capacity table” are applicable in scenarios where P2 < 0,7 P1. In the remaining scenarios a correction factor must be applied: PRESSURE RATIO * P2 / P1 * Pressure ratio in bar abs (barg + 1) Superheated steam: When the medium is superheated steam, instead of saturated steam, a correction factor must also be applied. The required mass flow must be multiplied by the following factor: Vh, where Vh = specific volume of superheated steam, and Vs Vs = specific volume of saturated steam. ACTUATOR AND SPRING...

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ADCA HOW TO SIZE (USING STEAM TABLE) Example Required saturated steam capacity: 300 kg/h; Upstream pressure: 3 bar; Required downstream pressure: 2 bar. Solution: First determine correction factor for pressure ratio: (2+1) / (3+1) = 0,75 → f = 1,25 Then multiply the given capacity: 300 × 1,25 = 375 kg/h Afterwards, refer to the cell with the number “3” in the column “INLET” of the saturated steam capacity table. In that line, the values for selection of the pressure reducing valve size can be found. In this particular scenario, a value equal to or higher than 375 kg/h is required, and the...

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DIMENSIONS – VALVE (mm) SIZE DIMENSIONS – ACTUATOR (mm) ACTUATOR VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA MATERIALS VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA MATERIALS – VALVE POS. Nº * Valve plug Stem guide Compensating spring Guide tube Bellows gasket Stainless steel / Graphite Body gasket Stainless steel / Graphite Piston body extension (RP45G and RP45S) Piston body extension (RP45i) * Adjustment spring Spring steel Lower spring plate (RP45G and RP45S) Lower spring plate (RP45i) Threaded tube Ball bearing Zinc plated steel * Available spare parts. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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A series MATERIALS – ACTUATOR POS. Nº Lower diaphragm chamber Upper diaphragm chamber Pressure plate Diaphragm plate spindle Neoprene reinforced polyamid Neoprene reinforced polyamid Neoprene reinforced polyamid Flow restrictor Compression fitting Vent screw Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel * Available spare parts. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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RP45_2023 8Pages

Catalog excerpts

All VALSTEAM ADCA Engineering S.A. catalogs and technical brochures

RP45_2023
8Pages