Series 851
7Pages

Safety valves made of gunmetal, angle-type with threaded connections For the protection of: - Pressure-vessels/-systems for neutral / non-neutral vapours, gases and liquids - Steam boilers and steam plants - Stationary silos and bulk transport vehicles for liquid, granular and powdery goods taking into account the plant-specific regulations and making use of the suitable valve versions and sealing materials. • Mechanical engineering • pump protection • Apparatus construction and medical technology ( sterilizers, autoclaves ) • shipbuilding and -repair • Pressure booster systems water- / air-side • Steam- and industrial-boiler systems Safety valves are set and sealed at the factory. APPROVALS TÜV-Type test approval 666, 684 Requirements AD 2000 Data sheet A2 TRD 421 TRB 801 No. 22 and No. 23¹ DIN EN ISO 4126-1 Classification society DNV Lloyd’s Register EMEA American Bureau of Shipping Bureau Veritas Russian Maritime Register of Shipping Inlet body Outlet body Internal parts Stainless steel Bellows (optional) ¹only for versions with bellows

VALVE VERSION non-gastight version of spring housing for neutral media without counter pressure. with bellows for neutral and non-neutral media and/or counter pressure up to 4 bar. Spring, moving parts and the environment are protected from being affected by the medium. gastight version of spring housing for neutral and non-neutral media without counter pressure. The environment is protected from being affected by the medium. Only available without lifting device. This version is not available for inlet / outlet 15/15 and 20/20! gastight version with bellows for neutral and non- neutral,...

NOMINAL DIAMETERS, CONNECTIONS, INSTALL ATION DIMENSIONS Series 851: Connection, installation dimensions, ranges of adjustment Nominal diameter Connection DIN EN ISO 228 Range of adjustment ASME Coefficients of flow ISO 4126-1 Coefficients of flow ASME-Code Sec. VIII Div. 1 Flow coefficients for blow-off pressures > 3,5 bar. Flow coefficients with bellows is 0,24. 2 Rated slope value for G in scfm/psia; for D in pph/psia; for F in gpm/root (psid) psid = differential pressure before and after the valve 1 MAIN DIMENSIONS, INSTALL ATION DIMENSIONS www.goetze-group.com |...

INDIVIDUAL SELECTION / VALVE CONFIGURATION Valve version Lifting device Connection type Connection size TECHNICAL FINISHES, VARIANTS, ACCESSORIES Inlet area in hygienic finish by means of a flat seal (despite of an o-ring fixed by a nut) Pressure sensor connection M5 or G1/4 for monitoring the springhousing (only for valves with bellow) Inductive proximity sensor, fitted, for indication of valve position, including connection cable 5m Especially for gaseous O2 applications by employment of specific materials including oil- and grease free production process Galvanically nickel-plated finish...

Series 851: Blowing-off rates at 10% above set pressure 15 20 Bellows without with III III *) only possible with metal-to-metal sealing **) Version with bellows only available from 1 bar

CONTINUATION - Series 851: Blowing-off rates at 10% above set pressure Nominal diameter DN

CAPACIT Y TABLE ACC. TO ASME- CODE SEC. VIII DIV. 1 Series 851: Blowing-off rates at 10% above set pressure Nominal diameter DN Set pressure psi(g) 15