Safety Relief Valve HON 835

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1 Safety Relief Valve HON 835 product information serving the gas industry worldwide

2 safety relief valve HON 835 Application, advantages, technical data Application: as leakage relief valve (SBV) in gas pressure regulating stations for natural gas according to DVGW G 6, other gaseous media on request Adventages: simple design can be mounted in any position safe operation high respose accuracy technical data Max. operating pressure p max up to 5 bar setting ranges W ds,3 bar to, bar valve seat diameter measuring unit : 3 mm measuring unit and : 5 mm connections PN 4 internal thread G PN 6 and PN 5 screw connections without brazing to DIN 353, for outside pipe dia. mm (measuring unit ), for outside pipe dia. 8 mm (measuring unit and ) venting of spring chamber as a leakage relief valve: internal venting through discharge line as a main safety device: seperate connection of vent line with outside pipe dia. mm materials ambient temperature main valve spring housing valve sealing 5 C to +6 C forged aluminium alloy/cast aluminium alloy steel NBR FKM function and strength acc. to DIN 338 DINDVGWReg.No. NG435AS583

3 SAfety Relief valve HON 835 Application, advantages, technical data technical data CE mark according to PED Ex protection 8 Since the device is not fitted with potential ignition sources of its own, it is not subject to ATEX 95 (94/9/EG) regulations (all used electronic accessories meet ATEX requirements). 3 adjustable range (mbar) setpoint spring No. colour measuring unit measuring unit measuring unit grey yellow 3 ivory 4 bright red 5 green 6 light blue 7 dark blue 3 to to 8 to 5 to 3 5 to 4 3 to 5 45 to 5 to 3 5 to 75 4 to 5 75 to to 3 5 to 4 to to 6 3 to 8 4 to response precision category measuring unit measuring unit measuring unit AG 5 for p d < 5 mbar AG,5 for p d = 5.. mbar AG for p d > mbar AG for p d < 5 mbar AG 5 for p d = 5.. mbar AG,5 for p d > mbar AG 5 for p d < 4 mbar AG,5 for p d 4 mbar

4 safety relief valve HON 835 Design and operation The safety relief valve (SBV) HON 835 was designed to automatically relieve a gas stream of surplus pressure, as soon as the pressure prevailing in the system to be protected rises up to the preset response pressure limit. The SBV closes again after the pressure in the line has fallen to the closing point. The HON 835 is mainly used as a leakage relief valve. It is installed downstream of the gas pressure regulator in order to prevent the shutoff valve (SAV) in its function as a main safety device from unintended release (i.e. the gas pressure regulator gives no tight shutoff on zero flow). 4 The pressure prevailing in the system to be monitored is fed to the lower side of the through the measuring impulse line, whereas the force of the setpoint spring maintains on the upper side of the. If the pressure to be monitored rises up to the preset response pressure limit, the and the plate are pushed upwards from the valve seat, so that the gas can flow into the discharge line. If the pressure falls below the response pressure limit, the SBV will close completely tight again as soon as the pressure is lowered to on the closing pressure level (approx..9 x response pressure). The spring chamber is connected with the discharge line through a bore in the valve plate, so that the installation of a separate vent line is not necessary. HON 835 with measuring unit setpoint screw setpoint spring bore for venting chamber valve plate valve seat (die diameter 3 mm)

5 SAfety Relief valve HON 835 Design and operation HON 835 with measuring unit setpoint screw setpoint spring bore for venting chamber valve plate 5 HON 835 with meassuring unit setpoint screw setpoint spring bore for venting chamber valve plate outlet pressure atmosphere

6 safety relief valve HON 835 Dimensions, weights and connections 9 HON 835 with measuring unit 6 Connecting lines thread M 6 x,5, for pipe x,5 discharge line connection thread M 6 x,5, for pipe x, HON 835 with measuring unit or measuring impulse connection thread G, or pipe 8 x,5 discharge line connection thread G, or pipe 8 x,

7 SAfety Relief valve HON 835 Type description Type Description (Example) HON 835 E5/E8 5 / F5 type inlet connection outlet connection valve seat diameter measuring unit no. setpoint spring no. 7 HONpartno.* housing with accessoires with measuring p max 4 bar p max 6 bar p max 5 bar unit or or E G E 8 E G E measuring units setting range in mbar assembly HONpartNo. for setpoint spring 3 to to 8 to 5 to 3 5 to 4 3 to 5 45 to F F F3 F4 F5 F6 F7 5 to 3 5 to 75 4 to 5 75 to to 3 5 to 4 to F F F3 F4 F5 F6 F7 to 6 3 to 8 4 to F5 F6 F7 *) The HoneywellPartNo. exists on the identification plate of the casing.

8 For More Information To learn more about Honeywell s Advanced Gas Solutions, visit or contact your Honeywell account manager GERMANY Honeywell Process Solutions Honeywell Gas Technologies GmbH Osterholzstrasse Kassel, Deutschland Tel: +49 ()56 57 Fax: +49 () HON Honeywell International Inc.

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