PRV47
8Pages

Catalog excerpts

ADCA PILOT OPERATED PRESSURE REDUCING VALVES PRV47 and PRS47 DESCRIPTION The ADCA PRV47 pilot operated pressure reducing valves are designed for use with steam, compressed air, nitrogen and other gases compatible with the construction materials. The PRV47 can be installed in pressure reducing stations throughout all industries, and provide sensitive and accurate control even when inlet pressure fluctuations or relevant flow variations occur. MAIN FEATURES Precise control of downstream pressures from 0,07 bar to 17 bar. Robust steel or stainless steel construction. Suitable for dead end conditions. Guided piston and valve stem. Hardened plug. OPTIONS: Soft sealing. Low pressure top. Dome loaded version. Bottom cover drain connection. Stellited plug and seat. Internal sensing line. Saturated steam, compressed air and other gases (Group 2) compatible with the construction (except oxygen). AVAILABLE MODELS: PRV47, PRV47E – steel versions for steam. PRV47i, PRV47iE – stainless steel versions for steam (only available from DN 15 to DN 50). PRV47G, PRV47GE – steel versions for compressed air and gases. PRV47Gi, PRV47GiE – stainless steel versions for compressed air and gases. Suffix E: Version with solenoid valve for remote closure. PRS: All models above are available with an optional sustaining valve pilot, e.g. PRS57G (see Fig. 8). Female threaded ISO 7 Rp or NPT. Flanged EN 1092-1 PN 40. Flanged ASME B16.5 Class 150 or 300. Socket weld (SW) ASME B16.11. Horizontal installation. See IMI – Installation and maintenance instructions. In steam applications, a “Y” strainer, humidity separator and steam trap should be installed upstream of the valve. CE MARKING – GROUP 2 (PED – European Directive) CLASS 150 1/2" to 2" – VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA LIMITING CONDITIONS PRV47 PRV47i Body design conditions Maximum upstream pressure Maximum downstream pressure Minimum downstream pressure * Maximum operating temperature Valve model Maximum reducing ratio Maximum hydraulic factory valve body test 60 bar 60 bar 60 bar * 0,07 bar with low pressure top (limited to 7 bar maximum inlet pressure). Remark: Pressure and temperature limiting conditions may change if “G” version for compressed air and gases is chosen or soft sealing/piston rings are used. REGULATING RANGES SPRING COLOUR Regulating range * With low pressure top. Fig. 1 - Valve...

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Adapting flange (DN 50 and above) External sensing Detail A Pilot valve Detail A Pilot valve (soft) Internal sensing Detail B Main valve (soft) Detail C Optional drain connection Pilot valve body Low pressure pilot valve body Adapting flange Valve body Spring cover * Main valve seat * Main valve plug * Main valve plug (soft) AISI 316 w/ PTFE/GR; Rulon AISI 316 w/ PTFE/GR; Rulon * Main valve spring Piston guide * Piston rings VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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Piston liner Bottom cover * Bottom cover gasket Stainless steel / Graphite Stainless steel / Graphite AISI 301 / 1.4310 * Diaphragm gasket Stainless steel / Graphite Stainless steel / Graphite * Low press. diaphragm gasket Stainless steel / Graphite Stainless steel / Graphite * Pilot valve gasket Stainless steel / Graphite Stainless steel / Graphite Lower spring carrier * Adjustment spring Diaphragm spring Stainless steel Stainless steel * Pilot valve plug * Pilot valve plug (soft) * Pilot valve seat * Pilot valve gasket Copper / PTFE * Pilot valve spring Plastic / Stainless steel Plastic /...

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ADCA STANDARD VALVE FOR STEAM, COMPRESSED AIR AND OTHER GASES The high pressure upstream gas enters the main valve and the pilot valve. Compression of the regulating spring over the diaphragm causes the pilot valve to open, admitting regulated pressure to the piston chamber. The force exerted by the regulated pressure on top of the piston pushes it down which, in turn, opens the main valve. The downstream pressure is then transmitted through the sensing line, acting below the diaphragm. Any downstream pressure increase deflects the diaphragm, and the pilot valve closes, thus shutting off...

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ADCA VALVE WITH SOLENOID CLOSURE (PRV47E) The PRV47E operates like the standard valve, but it allows remote closure, by means of a switch or timer. When the solenoid valve closes, the pressure signal to the pilot valve is interrupted, causing the main valve to close. TECHNICAL DATA (SOLENOID VALVE) Body material Brass or stainless steel Maximum operating pressure Maximum operating temperature Level of protection Rated voltage Power consumption Fig. 7 - Valve with solenoid valve for remote closure PRESSURE REDUCING AND SUSTAINING VALVE (PRS47) The PRS47 is a derivative of the PRV47 and...

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ADCA CAPACITY TABLE INLET (barg) 0,7 1 2 OUTLET (barg) VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA ORDERING CODES PRV47 Valve model PRV47G – compressed air and gases Body material S355JR / 1.0045 or P250GH / 1.0460 carbon steel AISI 316 / 1.4401 stainless steel Options Standard valve for external sensing connection Valve with internal sensing line Solenoid valve for remote closure and external sensing connection a) Solenoid valve for remote closure with internal sensing line a) Pressure sustaining / reducing for external sensing connection b) Pressure sustaining / reducing with internal sensing line b) Pressure sustaining / reducing / solenoid for external sensing connection a)...

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PRV47 8Pages

Catalog excerpts

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PRV47
8Pages