pressure operated stainless steel body with socket welding ends PN40, DN 15 to 50 • Ruggedly built valve, particularly recommended for use with steam, superheated water, corrosive fluids • High-performance, maintenance-free stuffing box, resistant to thermal shock • Mixer function (two pressure inlets at 1 or 3, one outlet at 2) or distributor function (one pressure inlet at 2, two outlets at 1 and 3) • Vacuum operation up to 10-2 mbar • Allowable backpressure: up to 40 bar • Optical position indicator as standard • Autoclavable valve for use at high ambient temperatures (up to 180°C) • The valves satisfy Pressure Equipment Directive 97/23/EC • The valves in conformity with IEC 61508 Standard (2010 route 2H version) certified with integrity levels: SIL 2 for HFT = 0 Differential pressure Maximum allowable pressure Ambient temperature range Maximum viscosity Pilot fluid Max. pilot pressure Min. pilot pressure 0 to 40 bar [1 bar =100 kPa] 40 bar (within the specified limits, see diagram I) -25°C to +180°C 5000 cSt (mm2/s) Air 10 bar See below temperature range disc seal () DN 15-20-25: air and gas groups 1 & 2 DN 32-40-50: air and gas group 2 all DN: water, oil, liquids groups 1 & 2 and steam bronze PTFE mixer function Minimum pilot pressure distributor function Socket welding ends () Ensure that the compatibility of the fluids in contact with the materials is verified Body and plug Stainless steel Stuffing box housing Stainless steel Stem, disc Stainless steel Stuffing box packing PTFE chevrons Disc seal Bronze PTFE Valve body seal Graphite OTHER MATERIALS Operator 00181GB-2014/R02 Availability, design and specifications are subject to change without notice. All rights reserved. MATERIALS IN CONTACT WITH FLUID fluid temperature Aluminium, nickel plated SPECIFICATIONS ext. pipe diameter (m3/h) (l/min) (m3/h) (l/min) (m3/h) (l/min) (m3/h) (l/min) operating pressure differential operator diameter catalogue number ❉ Minimum pilot pressure varies with differential pressure. See piloting chart above. All leaflets are available on: www.asconumatics.eu V755-1

VALVES SERIES S398 OPTIONS AND ACCESSORIES • • • • • Metal-to-metal sealing disc Signaling box, with mechanical or inductive contacts Low ambient temperatures - Temperature range: -50°C to +70°C ATEX 94/9/EC versions for potentially explosive atmospheres, categories 2 GD and 3 GD 2 switches, Ex d protection, mounted on valve with 2 Crouzet contacts type 83101-I-W1, for use in ambient temperatures from -20°C to +80°C: suffix SD2 [Contact us for option with 1 Honeywell contact type 1HS1 (-55°C to +82°C) or 1 Crouzet contact (-20°C to +80°C).] • Valve seat leakage class VI as defined by FCI 70-2,...