VALFONTA SELF-ACTING PRESSURE REDUCING VALVE M1
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1 SELF-ACTING PRESSURE REDUCING VALVE M1 M1-15A-ENG
2 PRESSURE REDUCING VALVE MODEL M1 VALFONTA MAIN CHARACTERISTICS The M1 model is self-operated bellows sealed pressure reducing valve. This series of regulators is suitable for steam, compressed air, non-hazardous gases and liquids. Very quick response to the demand. Globe valve, single seat, outlet pressure regulated by diaphragm and inlet pressure balanced (from DN65). Stem sealed by bellow of double layer in stainless steel. To avoid any damage on the bellows M1 series is provided of anti rotation system. Actuator mounts diaphragm with intermediate reinforced lining. Regulation range between 0,1 and 15 barg with different actuators. Fluids Liquids, compressed air, neutral gases and steam. Max. inlet pressure Sizes 40 barg (DN15 to DN50) 25 barg (DN65 to DN150) DN15 to DN150 Body material Connections Trim material Nodular Iron GGG40.3 Carbon steel A216 WCB Stainless steel A351 CF3M Bronze RG10, on request Flanged DIN PN16-PN40 Flanged ANSI 150 / 300 Threaded BSP / NPT Stainless steel Aisi 316L Diaphragm Material EPDM -40ºC to 125ºC EPDM + PTFE 125ºC to 250ºC Seal material Graphited PTFE NBR, PEEK, EPDM, Other configurations: - Kv or CV reduced. - Trim material: Monel, Bronze or others - A control line kit for pressure tapping directly at the body is available on request (optionally with or without condensation tank) for set points > 1 bar. - Condensation tank (pot) is available and necessary for steam or fluid upper to 125 ºC, to protect the diaphragm against excessive temperature. - Pressure excess valve (see S1 model).
3 A Body valve B Seat (replaceable) C Seal D Compensation gasket E Bellows F Adjusting nut G Nut H Diaphragm I Actuator casing (Upper) J Actuator casing (Lower) K Springs L Impulse pipe M Tank N Coupling HOW DOES IT WORKS When the downstream demand increases, downstream pressure will drop. The pressure on the diaphragm drops, allowing the regulator to open further. Because of the unbalance of the measuring element and the loading element, the restricting element will move up to allow passage of more flow. When the downstream demand for flow decreases, downstream pressure increases. In this case, unbalance causes the restricting element to move up to pass less flow or lockup. When the pipeline is full filled we have to match the required outlet pressure (Set) acting on the adjusting nut (F). If this pressure overcomes set value, the valve will close proportionally to maintain outlet pressure. RECOMMENDATIONS This series must be used only as a pressure reducing valve because any variation will be absorbed by the diaphragm and compensated. Valve close when outlet pressure increases. Standard instalation when temperature is upper 0ºC Another option for liquids and neutral gases until 80 ºC This position is not admitted Starting from size DN65 valve is provided with a compensation gasket (D) to regulate inlet pressure.
4 DN65 DN150
5 DN40 DN50 DN15 DN32
6 REF DESCRIPTION MATERIAL 1 Body Nodular Iron EN-JS1049 (GGG40.3), Bronze RG10, Carbon Steel (GSC-25N), Stainless steel ( AISI 316) 3 Lower support seal SS 316L 4 Bush SS 316L 5 Washer guide stem SS 316L 6 Cover Carbon steel SS 316L 7 Screw Carbon steel A-2 Stainless St. (A-4 optionally) 8 Bellow guide or Carbon steel SS 316L 9 O-ring Viton or Graphite+SS Springs (Spring Carbon steel 55 Si 7) 11 Ball bearing (Bearing steel 100 Cr 6) 12 Upper support springs Carbon steel 13 Adjusting nut Carbon steel 14 Support plate Carbon steel 15 Nut M Carbon steel 16 Support screws M Carbon steel 17 Nut M Carbon steel 18 Coupling Brass / Stainless steel 19 Diaphragm EPDM, EPDM+PTFE, NBR, VITON, 20 Actuator casing (upper) (Steel sheet with epoxy paint) or Stainless steel sheet AISI Diaphragm screw (Stainless steel AISI 304) 22 O-ring Viton 23 Diaphragm plate Carbon steel 24 Diaphragm stem Carbon steel 25 Hexagonal screw A-2 Stainless steel 25b Hexagonal Nut A-2 Stainless steel 26 Actuator casing (lower) (Steel sheet with epoxy paint) or Stainless steel sheet AISI Allen screw Carbon steel 28 Antirotation system Carbon steel 29 Regulation stem (Stainless steel AISI 304) 30 Guide ball bearing (Stainless steel AISI 304L) 31 Column Carbon steel 32 Nut guide bellow Carbon steel (Stainless steel AISI 316L) 33 Bellow (Stainless steel AISI 316Ti) 34 Lower support springs Carbon steel 35 Body Gasket Graphite with SS304 35b Guide Gasket Graphite with SS Bush guide SS 316L 37 Balancing Gasket Graphited PTFE 38 Allen screw A-2 Stainless steel 39 Support seal SS 316L 40 Seal Graphited PTFE (Consult for others) 41 Washer A-2 Stainless steel 42 Nut SS 316L 45 Seat SS 316L
7 Technical data Nominal pressure PN16-PN25-PN40 or CLASS 150-CLASS 300 Nominal size DN15 to DN50 DN65 to DN80 DN100 to DN150 Max. permissible differential pressure Δp 25 bar 20 bar 16 bar Max. permissible temperature: body Refer to technical sheet HT-101 Max. permissible temperature: plug Max. permissible temperature: actuator metal: 250ºC PTFE+GR: 220ºC PEEK: 250ºC EPDM: 125ºC FPM: 150ºC NBR: 80ºC metal: 220ºC PTFE+GR: 220ºC PEEK: 250ºC EPDM: 125ºC FPM: 150ºC NBR: 80ºC Diaphragm EPDM till 125ºC Diaphragm EPDM+PTFE and condensation tank till 250ºC Dimensions, weight and Kv value DN Kv (m³/h) A EN (mm) A ANSI150 (mm) (inches) A ANSI300 (mm) (inches) 184 7, , , , , , , , , , , L (mm) Weight (kg.) Approx. Downstream pressure ranges (D) available on request Range (bar g) DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100 DN125 DN150 0,1-1, Approximate diameter of the recommended actuator (mm)
8 Typical installation WATER 1.- Isolation valve 2.- Filter 3.- Pressure gauge (inlet pressure) 4.- Pressure gauge (outlet pressure) 5.- Reducing valve M1 6.- Safety valve 7.- Tank STEAM Distributor
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