RP45_2020
8Pages

Catalog excerpts

ADCA PRESSURE REDUCING VALVE RP45 (ASME) DESCRIPTION The ADCA RP45 series 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. Low-noise flow divider. 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. Suffix T: soft sealed with PTFE/GR. Suffix N: soft sealed with nitrile rubber. Flanged ASME B16.5 Class 150 or 300. AVAILABLE ACTUATORS: RP45 1/2" to 4" with sensing pipe on body CE MARKING – GROUP 2 (PED – European Directive) Class 150 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 (1/2" to 4") Maximum downstream pressure (6") Minimum downstream pressure Maximum operating temperature Maximum reducing ratio Maximum hydraulic factory valve body test Remark: Other soft materials and temperature limits on request. Actuator model Maximum operating pressure (bar) Maximum operating temperature * The water seal pot must be installed in the sensing pipe when operating with steam or liquids at higher temperatures. FLOW RATE COEFFICIENTS (m³/h) SIZE SATURATED STEAM...

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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: 500 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: 500 × 1,25 = 625 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 625 kg/h is required, and the...

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Remarks: In the beginning of year 2022 new face to face dimensions have been defined for some Class 150 valves. Valves may still be supplied with the previous face to face dimensions under request. Consult the manufacturer. DIMENSIONS – ACTUATOR (mm) DIMENSION ØD VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA MATERIALS FLOW 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 body * Valve plug Stem guide Stem guide Compensating spring Split ring Guide tube Bellows gasket Stainless steel / Graphite Stainless steel / Graphite Body gasket Stainless steel / Graphite Stainless steel / Graphite Piston body Piston body extension * Adjustment spring Spring steel Spring steel Lower spring plate Upper spring plate Threaded tube Ball bearing Zinc plated steel Zinc plated steel Pressure star Pressure tube Bellows housing Pillars flange Zinc plated steel Belleville washer * Available spare parts. VALSTEAM ADCA We reserve the right to...

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C series MATERIALS – ACTUATOR POS. Nº 51 52 Lower diaphragm chamber Upper diaphragm chamber Spacer ring Pressure plate Diaphragm plate spindle * Plain bearing Neoprene reinforced polyamid 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 Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc plated steel Zinc...

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RP45_2020 8Pages

Catalog excerpts

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

RP45_2020
8Pages