Series 861
6Pages

Safety valves made of gunmetal, angle-type with threaded connections For the protection of: - pressure tanks and -systems for neutral / non-neutral vapours, gases and liquids - steam boilers and steam plants Please observe plant-specific regulations and use of appropriate valve version and sealing material. • mechanical engineering • pump protection • process equipment construction and medical technology (sterilizers, autoclaves) • shipbuilding industry and marine equipment • pressure booster plants water-/ air-side • steam- and industrial boiler plants Safety valves are set and sealed at the factory. TÜV-Type test approval 2061 Requirements AD 2000 Data sheet A2 TRD 421 DIN EN ISO 4126-1 Classification society DNV Lloyd’s Register EMEA American Bureau of Shipping Bureau Veritas Russian Maritime Register of Shipping Registro Italiano Navale Inlet body Stainless steel Outlet body Internal parts Stainless steel www.goetze-group.com | info@goetze-armaturen.de | Phon

VALVE VERSION Standard, non-gastight version of the spring housing for neutral media without counter pressure, not for medium in combination GF gastight version of spring housing for neutral and non-neutral media, not counter pressure compensated. The environment is protected from being affected by the medium. Air, vapours, gases and steam The temperature of the medium under atmospheric pressure must not reach boiling point Air, vapours, gases, steam and liquids Only available as gastight version of the spring housing Standard with twist-type lifting mechanism, non-gastight version Lifting...

NOMINAL DIAMETERS, CONNECTIONS, INSTALL ATION DIMENSIONS Series 861: Connection, installation dimensions, ranges of adjustment Nominal diameter Connection DIN EN ISO 228 Outlet DIN EN ISO 228 Weight Range of adjustment Coefficients of flow for blow-off pressures >3,0 bar. For lower pressures refer to values in the capacity table. MAIN DIMENSIONS, INSTALL ATION DIMENSIONS

INDIVIDUAL SELECTION / VALVE CONFIGURATION Valve version Lifting device Connection type Connection size Especially for gaseous O2 applications by employment of specific materials including oil- and grease free production process Galvanically nickel-plated finish Chrome-plated finish Chemically nickel-plated finish CERTIFICATES / APPROVALS Material test certificate acc. DIN EN 10204 3.1 (MPZ 3.1) (pressure retaining part) Seat tightness test with helium, leak detection method under vacuum incl. Factory Inspection Certificate 3.1 acc. to DIN EN 10204 TÜV/DEKRA individual inspection acc. EN...

Series 861: Blowing-off rates at 10% above set pressure 8 Nominal diameter DN d0 = 6 mm Set pressure bar I II Air I 0,5 18,9 15,5 Nm³/h 1,0 26,1 20,8 Steam II kg/h Water III m³/h

FLOW COEFFICIENTS CHART Coefficient of discharge αw i.e. Kdr as a function of the relation between the pressures pa0 / p 0 of vapours and gases counter pressure bar(a) blow-off pressure bar(a) patm = ambient i.e. atmospheric pressure = 1,01325 bar(a) Example to determine the coefficient of discharge αw i.e. Kdr in relation to the set-pressure pset Set-pressure Blow-off pressure pset bar(g) For a safety valve set at = 0,5bar(g) and blowing-off into the enviroment the blow-off pressure is determined as follows: 0,5 Consequently: pa0 1,01325 bar(a) = = 0,72 p0 1,61 bar(a) and extracted from...