Pilot Operated Pressure Reducing Valve PRV 47 (Steel) PRV47I (St.Steel)
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1 OPTIONS: USE: AVAILABLE MODELS: Pilot Operated Pressure Reducing Valve PRV 47 (Steel) PRV47I (St.Steel) DESCRIPTION The ADCA PRV47 pilot operated pressure reducing valves are designed for use on steam, compressed air, nitrogen and other gases compatible with the construction and they can be installed on pressure reducing stations throughout all industries. Connections are flanged or threaded. MAIN FEATURES Robust totally steel or stainless steel construction. Suitable for dead end conditions. Guided piston and valve stem Hardened plug Soft faced valve plug for gases and steam Special pressure top for low pressures Drain connection in bottom cover Stellited plug and seat Saturated steam, compressed air and other gases (Group 2) compatible with the construction ( except oxygen). PRV47 standard model for steam PRV47G - compressed air and gases SIZES: DN 15 to DN 50 CONNECTIONS: Flanged DIN or ANSI Threaded BSP, NPT, SW. INSTALLATION: ORDER REQUIREMENTS: HOE TO SELECT: Horizontal installation. An Y strainer, steam separator and steam trap should be provided upstream the valve. See IMI, installation and maintenance instructions. Type of fluid Maximum operating temperature Inlet and outlet pressure Flow rate (maximum and minimum) Never size the valve according to the pipe diameter in which it has to be fitted but according to the required actual flow of fluid. Refer to valve calculation table or consult the factory. CE MARKING (PED - European Directive 97/23/EC) PN 40 Category DN15 to DN32 SEP - art. 3, paragraph3 DN40 to DN50 1 (CE Marked) VALVE LIMITING Body design conditions: PN40 CONDITIONS: 40 bar at 120 o C 32 bar at 239 o C 28 bar at 300 o C Min.working temperature: -10 oc Maximum upstream pressure (steam): 25 bar Maximum upstream pressure (air): 31 bar Maximum downstream pressure: 17 bar Maximum downstream pressure: 0.35 bar* *0.07 bar with low pressure top (limited at 7 bar inlet). Pressure and temperature may change if soft seating or piston rings are used. USEFUL NOTES ON VALVE AND PIPE SIZING A special low pressure top assembly should be fitted for outlet pressures from 0.07 up to 0.5 bar (Fig.2) Two regulators in parallel should be used on larger systems where minimum flow is less than 10% of maximum. If the flow is unknown it is possible to estimate it based on pipe sizing or equipmemt heat requirement - please consult. The balance pipe connection is recommended to enter downstream pipe at a minimum of 1 meter from valve. A spool piece can be supplied to house the balancing pipe. INSTALLATION Installation instructions are available (IMI-PRV47) and typical assembling drawing. Special assembling design may be produced on request.
2 MATERIALS - PRV47 Steel construction POS. DESIGNATION M ATERIAL 1 VALVE BODY ST 52.3(1.0570) / C22.8 (1.0460) 2 PILOT VALVE BODY ST.STEEL (1.4308) 3 TOP COVER CK45 (1.1191) 3A COVER NUT CK45 (1.1191) 3B TOP COVER CK45 (1.1191) 3C COVER NUT CK45 (1.1191) 4 * MAIN VALVE SEAT ST.STEEL 5 * MAIN VALVE HARDENED ST.STEEL 5A * MAIN VALVE (SOFT) SS316 W/ PTFE/GR; RULON, 6 * MAIN VALVE SPRING ST.ST. AISI * PISTON BRASS/BRONZE 8 * PISTON RINGS BRONZE / FKM / EPDM / NBR 9 PISTON LINER ST.STEEL 10 BOTTOM COVER ST 52.3 (1.0570) 11 * BOTTOM COVER GASKET ST.ST/GRAPHITE 12 * DIAPHRAGM ST.STEEL 12A * LOW PRESSURE DIAPHRAGM ST.STEEL 13 * DIAPHRAGM GASKET ST.STEEL/GRAPHITE 13A * DIAPHRAGM GASKET ST.STEEL/GRAPHITE 14 * PILOT VALVE GASKET ST.STEEL/GRAPHITE 15 LOWER SPRING CARRIER BRASS 16 * ADJUSTMENT SPRING STEEL 16 A DIAPHRAGM SPRING STAINLESS STEEL 17 TOP SPRING CARRIER BRASS 18 SPRING IDENT. PLATE ALUMINIUM 19 * PILOT VALVE ST.STEEL 19A * PILOT VALVE (SOFT) PTFE/GR; RULON, ETC 20 * PILOT VALVE SEAT ST.STEEL 21 * PILOT VALVE GASKET COPPER 22 * PILOT VALVE SPRING ST.STEEL 23 HANDWHEEL PLASTIC/ST.STEEL 23A LOCKNUT ST.STEEL 24 BOLTS STEEL C BOLTS STEEL COMPRESSION FITTING PLATED CARBON STEEL 26 BALANCE PIPE COPPER 27 * PILOT VALVE STRAINER ST.STEEL 28 STRAINER NUT ST.STEEL (1.4301) 29 GASKET COPPER 100 ADCA P ** STEAM TRAP ADCA TH ** GLOBE VALVE ADCA GV32B 104 ** DRAIN CONNECTION NIPPLE STEEL DN1/2" x 3/8" 105 SOLENOID VALVE BRASS 106 SUSTAINING VALVE ADCA PS STRAINER ADCA IS100I-ST.STEEL * Available spare parts; **Not included, supplied loosed on request
3 MATERIALS - PRV47I Stainless steel construction POS. DESIGNATION MATERIAL 1 VALVE BODY ST.STEEL (1.4401) 2 PILOT VALVE BODY ST.STEEL (1.4308) 3 TOP COVER ST.STEEL (1.4401) 3A COVER NUT ST.STEEL (1.4401) 3B TOP COVER ST.STEEL (1.4401) 3C COVER NUT ST.STEEL (1.4401) 4 *MAIN VALVE SEAT ST.STEEL 5 *MAIN VALVE HARDENED ST.STEEL 5A *MAIN VALVE (SOFT) SS317 W/ PTFE/GR / RULON, 6 *MAIN VALVE SPRING ST.ST. AISI *PISTON STAINLESS STEEL 8 *PISTON RINGS BRONZE / FKM/ EPDM / NBR 9 PISTON LINER ST.STEEL (1.4401) 10 *BOTTOM COVER ST.STEEL (1.4401) 11 *BOTTOM COVER GASKET ST.ST/GRAPHITE / PTFE 12 *DIAPHRAGM ST.STEEL 12A *LOW PRESSURE DIAPHRAGM ST.STEEL 13 *DIAPHRAGM GASKET ST.STEEL/GRAPHITE 13A *DIAPHRAGM GASKET ST.STEEL/GRAPHITE 14 *PILOT VALVE GASKET ST.STEEL/GRAPHITE 15 LOWER SPRING CARRIER BRASS / ST.STEEL 16 *ADJUSTMENT SPRING STEEL / ST.STEEL 16A DIAPHRAGM SPRING STAINLESS STEEL 17 TOP SPRING CARRIER BRASS 18 SPRING IDENT. PLATE ALUMINIUM / ST.STEEL 19 *PILOT VALVE ST.STEEL 19A *PILOT VALVE (SOFT) PTFE/GR; RULON, ETC 20 *PILOT VALVE SEAT ST.STEEL 21 *PILOT VALVE GASKET COPPER / PTFE 22 *PILOT VALVE SPRING ST.STEEL 23 HANDWHEEL PLASTIC/ST.STEEL 23A LOCKNUT ST.STEEL 24 BOLTS ST.STEEL A-4 24C BOLTS ST.STEEL A-4 25 COMPRESSION FITTING STAINLESS STEEL 26 BALANCE PIPE STAINLESS STEEL 27 *PILOT VALVE STRAINER ST.STEEL 28 STRAINER NUT ST.STEEL (1.4301) 29 GASKET COPPER / PTFE 100 ** PRESSURE REGULATOR (Relieving) ADCA P ** STEAM TRAP ADCA TH ** GLOBE VALVE ADCA GV32B 104 ** DRAIN CONNECTION NIPPLE STAINLESS STEEL DN1/2" x 3/8" 105 SOLENOID VALVE STAINLESS STEEL 106 SUSTAINING VALVE ADCA PS15 - ST.STEEL 107 STRAINER ADCA IS100I -ST.STEEL *Available spare parts; **Not included, supplied losed on request.
4 PRESSURE RANGES IN bar SPRING GREEN BLACK COLOUR W/1 Diaphragm W/2 Diaphragms Red. Pressure 0.07 to 0.5 bar * 2 to 17 bar ** Red. Pressure 0.35 to 4 bar ** / * With low pressure top; **Standard diaphragm. Fig.1 - Valve with standard diaphragm; Fig.2 - Valve with low pressure top; Fig.3 - Valve with compressed air top. * Drain connection (option) for steam trapping. This drain connection do not replace the separator but can be useful if for example the valve stop operation for large periods. DIMENSIONS - VALVE BODY (mm) DIN A B C D E F G H I WEIGHT DIN Kgs Flanges /4" 3/8" /4" 3/8" /4" 3/8" /4" 3/8" /4" 3/8" /4" 3/8" 31
5 PRV 47 Standard for steam, compressed air or gases (Fig.4) Description of operation: the high pressure upstream fluid is admitted to the valve and pilot valve. By compressing the regulating spring over the diaphragm, the pilot valve opens admitting regulated pressure on the top of the piston, which opens the main valve allowing the flow. The downstream pressure is then transmitted through the balance pipe, acting on the underside of the diaphragm. Any downstream pressure increase deflects the diaphragm and the pilot valve closes, thus shutting off regulated gas to the piston which in turn closes the main valve assisted by the upstream pressure and loading spring. When the correct downstream pressure is achieved, the valve opens again, repeating the already described operation. (Fig.5) PRV47 valve with compressed air top for remote control (Fig.5) The regulating spring force is placed by a compressed air signal. Fig.6 PRV47 with drain connection The optional drain connection is specially recommended when it is not possible to install the humidity separator close to the valve, when the valve is on no-flow during large periods or for system cleaning during start up. Important: the balance pipe nr.26 (supplied with the valve) has to be always connected.
6 PRV47E with solenoid valve for electric remote control (Fig.7) This valve version operates like the standard valve but it aloud a remote control closure by means of a switching or timer control. When closing the solenoid valve, the pressure signal to the pilot valve is interrupted and thus also the main valve remain close. PRS47 pressure reducing and sustaining valve (Fig.8) This version is a combination of pressure reducing valve and pressure sustaining valve. Compressing the spring of the PS15 (nr.106) pressure sustaining valve the same is closed till a desired set pressure, interrupting the signal to the PRV47 pilot valve and consequently it will remain closed. Since the pressure supply to the PS15 valve reaches the desired set pressure it will aloud the flow and fluid signal to the PRV47 pilot valve, it will than work as already described. PS47 pressure sustaining valve (available on request) The pressure sustaining valves are particularly recommended in those systems where a limited flow rate is available and it is necessary to guaranty the supply to some critical process applications. Installing this valve in the supply of non-critical application limited to the minimum required pressure, they will close in case of excess of consumption and consequent pressure drop in the system, keeping the remaining flow available for the critical application. In general this valve maintain the upstream pressure under control.
7 abcde ADCA PRV 47 - STEAM CAPACITY TABLE ( Kg/h ) PRV 47 - COMP. AIR CAPACITY TABLE (Nm3/h-0ºC-1,013bar) INLET OUTLET SATURATED STEAM INLET OUTLET COMPRESSED AIR bar bar DN15 DN20 DN25 DN32 DN40 DN50 bar bar DN15 DN20 DN25 DN32 DN40 DN50 0,7 0, ,7 0, , , , , , , , , , , ,4 1, ,4 1, , , , , , , , , , , , , , , , , , , , , ,4 3, ,4 3, , , , , , , , , , , , , , , , , VALSTEAM ADCA We reserve the right to change the design and material of this product without notice. IS PRV47.10 E 05.07
8 abcde ADCA ORDERING CODES Valve Model PRV47-standard steam use PRV47G-compressed air and gases Material Construction Standard steel construction Stainless steel construction Remote Control and Pilots Solenoid valve 220V for remote closure up to 10 bar-180ºc Pressure sustaining / reducinng a) Pressure sustaining / reducinng / solenoid Diaphragm Type Standard diaphragm Low pressure diaphragm Outlet Pressure Green spring 0,35 to 4 bar - single diaphragm Black spring 2 to 17 bar - double diaphragm Pneumatic control top 0,35 to 4 bar - single diaphragm Pneumatic control top 2 to 17 bar - double diaphragm Piston Rings Bronze c) FKM c) EPDM c) NBR c) Drain Connection Standard valve Drain connection DN 3/8" Valve Plug Standard metal to metal with hardened plug Stellited valve and plug Soft plug - Virgin PTFE Soft plug - PTFE/GR Soft plug - Rulon Connections Threaded connections BSP Threaded connections NPT DIN flanges PN40 AINSI flanges 150# AINSI flanges 300# SIZE DN 1/2" or DN15 DN 3/4" or DN20 DN.. Special valves / Extras b) VR.47 E S VR.47 VR.47G (1) I E S S. L (1) V E N (1) D E Remarks: (1) Omitted if standard valve is requested a) PS15 Sustaining valve standard spring : 0,2 to 10 bar b) Full description or additional codes has to be hadded in case of a non-standard combination c) Valve limited to maximum operating temperature materials VALSTEAM ADCA We reserve the right to change the design and material of this product without notice. IS PRV47.10 E 05.07
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