Self-operated Pressure Regulators Excess Pressure Valve Type M 44-7 Applications Pressure regulators for set points from 0.005 to 20 bar · KVS 0.2 to 22 · Valve sizes DN 15 to 50 or G ½ to G 2 · Suitable for liquids and gases up to 130 °C, steam up to 200 °C · Nominal pressure PN 25 The valve opens when the upstream pressure rises Special features • Diaphragm-controlled, spring-loaded proportional regulators requiring no auxiliary energy • Particularly favorable control properties, while the offset remains small • All parts made of CrNiMo steel with smooth surfaces Versions Excess pressure valve as diaphragm-controlled, spring-loaded proportional regulator to regulate the upstream pressure p1 to the adjusted set point. The valve opens when the upstream pressure rises. KVS coefficients from 3.5 to 22 · Set points from 0.02 to 12 bar: Connection DN 15, 25, 32, 40 and 50 or G ½, G 1, G 1¼, G 1½ and G 2 · Soft-seated plug · Suitable for liquids and gases up to 130 °C · Balanced KVS coefficients 0.2 to 1.5 · Set points from 0.005 to 12 bar: Connection DN 15 and DN 25 or G ½ · Metalseated plug · Suitable for steam up to 200 °C and for liquids and gases up to 130 °C · Not balanced · Only version for steam with external control line Connection G ½ · Soft-seated plug · Suitable for liquids and gases up to 130 °C · Not balanced · With external control line Special versions – Version free of oil and grease for oxygen – Version for sterilized steam on request – With welded-on flanges with raised face, ANSI Class 150 – Special connections according to customer specifications – NPT connections for pressure and control lines Associated Information Sheet Fig. 1 · Type M 44-7 Excess Pressure Valve, KVS 4, set point range 2 to 5 bar, connection G 1

Principle of operation The medium flows through the valve as indicated by the arrow. The position of the valve plug (3) determines the flow rate across the area released between the plug and seat (2). The valve is closed when it is relieved of pressure (p1= p2) by the force of the positioning spring (6). An increase in the upstream pressure p1 causes the valve to open. The upstream pressure p1 to be regulated is transmitted to the diaphragm (5) over the control line (in versions with KVS 0.2, 0.5, 0.9 and 1.5/set point ranges 0.005 to 20 bar) or internally in the other version. The diaphragm...

Table 1 • Technical data ■ All pressures in bar (gauge) Ordering text Excess Pressure Valve Type M 44-7 Nominal pressure PN ... Set point range ..., Kvs ..., Connection G ... or DN with welded-on flanges PN 16 acc. to DIN 2633/with flanges with raised face ANSI Class 150 Max. perm. temperature ... Plug sealing made of EPDM/FPM/PTFE/metal seal Process medium . Spring housing standard/optional with seal and leakage line connection (for toxic, explosive or flammable media) Optional special version ...

Type M 44-7 • Version with Kys 3.5 to 22 Set point ranges 0.02 to 0.12 • 0.1 to 0.5 • 0.3 to 1 to 2.5 • 2 to 5 • 4 to 8 • 6 to 12 bar A = With threaded connection G ... • B = With welded-on flanges acc. to DIN EN 1092-1 • 0 D = Clamp/diaphragm outer diameter A = With threaded connection G V2 • B = With welded-on flanges PN 40 acc. to DIN EN 1092-1 • 0 D = Clamp/diaphragm outer diameter 1 +130 mm (version for steam) • 2) +1 kg (version for steam) Specifications subject to change without notice. SAMSON AG • MESS- UND REGELTECHNIK WeismullerstraBe 3 • 60314 Frankfurt am Main • Germany Phone: +49...