Safety Shut-Off Valve HON 70 Product information serving the gas industry worldwide
Application, Characteristics, Technical Data Application main safety device for gas pressure regulating stations suitable for natural gas according to DVGW G 60, other gases on request Characteristics compact design; small face-to-face dimensions low pressure drop (valve seat diameter is same size as pipe size diameter) easy maintenance due to interchangeable cartridge assemblies version with different actuators as an optional feature shut-off reaction at diaphragm fracture electric release and remote indication technical data max. service pressure p max - DN - DN 0, DN 80, DN 00 6 bar bar (depending on the flange version) sizes DN, DN 0, DN 80 and DN 00 connections - DN : DIN-flanges PN 6 and flanges acc.to ANSI 0 RF - DN 0, DN 80, DN 00: DIN-flanges PN 6, PN and flanges acc.to ANSI 0 RF valve diameter same size as nominal width materials main valve body DN and DN 0 main valve body DN 80 and DN 00 control unit body internal parts diaphragms, o-rings cast steel cast steel, ductile iron cast aluminium aluminium, stainless steel, brass,steel rubber-like plastic material (NBR) ambient temperature range class -0 C to +60 C function and strength acc. to DIN EN 438 (DIN 338) special features manual release electro-magnetic release at current supply / current drop electric remote control of valve position closed Ex-protection The device does not have any potential ignition sources and thus ATEX 9 does not apply to it (applied electronic accessories comply with the ATEX requirements). DIN-DVGW-Reg.-No. NG-4303AU000 CE-sign acc. to PED 8
Application, Characteristics, Technical Data DN : setting range of the SSV measuring units Ka, Ka measuring unit Ka setpoint spring overpressure release underpressure release No. colour yellow bright red 3 dark red 4 white bright blue 6 white 7 black wiredia. in mm. 3. 3.6 4.7...4 specific setting range W dso (bar) 0.00... 0.00 0,080... 0.0 0.00... 0.00 0.00....00 minimal differential between response pressure (p do ) and service pressure (p d )* p wo (bar) 0.030 0.00 0.00 0.0 specific setting range W dsu (bar) 0.00... 0.0 0.04... 0.040 0.03... 0.0 minimal differential between response pressure (p du ) and service pressure (p d )* p wu (bar) 0.0 0.030 0.060 response pressure category** AG 0/ 0/ /. /. 0 0/ 3 Ka 3 4 bright red dark red white 3. 3.6 4.7 0.400... 0.800 0.600....600.00... 4.00 0.00 0.00 0.300 0/ 0/ /. 6 bright blue black..4 0.060... 0.0 0.0... 0.400 0.00 0.00 0/ DN 0 to DN 00: setting range of the SSV actuator units K3, K4, K, K6, K6 bright red 3. 0.00... 0.00 0.03 K3 6 bright blue black..4 0.004... 0.008 0.008... 0.00 0.008 0.008 K4 3 4 bright red dark red black 3. 3.6 4. 0.040... 0.00 0.080... 0.0 0.00... 0.00 0.00 0.030 0.060 /.../ 6 bright blue black..4 0.00... 0.00 0.0... 0.060 0.00 0.00 0/ 3 dark red 3.6 0.00... 0.800 0.00. K 4 black 4. 0.600....00 0.00./ bright blue. 0.0... 0.00 0.030 0/ 6 black.4 0.040... 0.0 0.060 3 dark red 3.6 0.600....000 0.00, K6 4 black 4..00... 4.00 0.400./ bright blue. 0.040... 0.0 0.060 0/ 6 black.4 0.0... 0.300 0.0 0 bright blue 3. 0.800....00 0.00 K6 black 4..000....000 0.00 grey.0.000... 0.00 0.400 3 brown 6.3.000... 7.0 0.800 *) Note: if control devices are used with both overpressure and underpressure release, then the min. gap between the two setpoints pdso and pdsu has to be at least 0% larger than the sum of the two differential values (Δpwo + Δpwu). pdso - pdsu. (Δpwo + Δpwu) **) The higher response precision category is valid for the first half, the lower response precision category is valid for the second half of the setting range.
Application, Characteristics, Technical Data Diagram for determination of pressure drop and max. permissible flow velocity (natural gas ρn=0.83 kg/m3) flow rate Qn in m3/h 0 300 00 700 000 000 3000 4000 000 0000 4 inlet pressure p u in bar 0,3 v max = 0m/s DN 00 DN 80 DN 0 0 6 size DN 0 DN 0,0 0,0 0,03 0,0 0,07 0, 0, 0,3 0, 0,7,0 pressure drop p in bar pmax = 0, bar.) determination of pressure drop: This diagram is valid for natural gas. For other gases please convert the flow rate into the natural gas flow. Qn nat. gas = Qn gas f in m3/h conversion factor f nitrogene 0,8 (for other conversion methane,08 factors please see town gas,3 Honeywell-booklet) air,6 example: given: DN 0, pu = 0 bar, Qn = 00 m3/h (town gas) Qn gas 00 m3/h determination of pressure drop: Qn nat. gas = = = 900 m3/h f,3 found: (path ): p = 0,07 bar < pmax = 0, bar.) permissible gas velocity vmax. It can be determined by using the nominal flow rate. example: given: DN 0, pu = 0 bar, Qn = 00 m3/h (town gas) gas velocity control: found: (path ): v < vmax = 0 m/s
Design and Operation HON 70 - DN : HON 70 - DN 80: measuring unit setpoint adjuster setpoint springs switching valve HON 99 ball mechanism measuring diaphragm measuring line closing spring control element main valve body The safety shut-off valve (SSV) HON 70 is designed to automatically shut off the gas flow of a gas pressure regulating station, as soon as the pressure within the system to be protected rises above or falls below pre-set limits. The HON 70 consists of a main valve body and a measuring unit as an actuating element. For regular maintenance the actuating element can easily be subjected to a visual inspection. In case of failure the actuating modules can be replaced by spare units, and the repair works can be carried out in the workshop without having to shut down the gas pressure regulating system. All measuring units of the safety shut-off valve are equipped with a spring-loaded diaphragm to block or release the ball mechanism of the tripping device. The diaphragm assembly is suitable for both overpressure and/or underpressure release. The response pressures for overpressure release and underpressure release can be adjusted independently from each other. A pressure compensating valve is integrated into the valve plate. This valve can easily be operated by hand under all pressure conditions, thus ensuring pressure balance at the valve plate before opening the main valve. From size DN 0 upwards the valve stem is provided to go through the pressure chamber. This design feature guarantees a perfect pressure balance, and any changes of service pressure have no influence on the release accuracy. The SSV control element shuts off the gas flow as soon as the pressure within the system to be protected rises above or falls below pre-set response points. This shut-off is effected by the measuring diaphragm and the tripping bush moving into the release position with the ball mechanism disengaging the valve stem to close the SSV control element. The valve can be re-set by hand only, after the outlet pressure at the measuring point has been decreased or increased to a value lying within the range of the pressure differentials to be observed for re-engagement.
Dimensions, Connections and Weights D D breathing line with HON 99 breathing line with HON 99 E measuring line E 6 B DN C measuring line DN C B A A dimensions in mm main valve measuring unit size body Ka and Ka K3 K4 K und K6 DN A B C D E* B C D E B C D E* B C D E* 84 90 30 Ø 00 80 0 4 480 30 36 3 48 3 Ø 78 40 48 3 Ø 8 40 80 98 6 3 36 670 70 3 Ø 78 670 70 3 Ø 8 670 00 3 6 3 36 670 70 3 Ø 78 670 70 3 Ø 8 670 connections measuring lines and vent lines pipe connection without brazing with compression joint acc. to DIN 33 pipe x. (screw joints M 6 x.) weights size 0 80 00 weight in kg* 8 9 43 49 *) approximate data, deviations depend on measuring unit
Type Description example HON 70-0 - K / E / HA / F - So size of body body with accessoires* size DN material EN-GJS400-8-LT flanges acc. to material GSMnN flanges acc. to PN 6 PN 6 ANSI 0 RF PN 0 80 00 - - 0 008 303 0 008 304 0 008 33 0 008 308 0 008 309 0 008 30 0 008 67 0 008 63 0 008 64 0 008 6-0 008 308 0 008 34 0 008 3 measuring unit type size SSV-measuring unit electro magnetic release manual release electric remote control of valve position closed special feature 7 size DN upper cutoff W do setting range in bar lower cutoff W du measuring unit 0,00...,00 0,400... 4,00 0,00... 0,0 0,060... 0,400 Ka Ka 0, 80, 00 0,00... 0,00 0,040... 0,00 0,00...,00 0,600... 4,00,000...,00 0,004... 0,00 0,00... 0,060 0,0... 0,0 0,040... 0,300 K3 K4 K K6 K6 accessories release by current supply E release by current drop E manual release HA remote indication of valve position closed F special feature (to be specified in detail) special feature So *) These Honeywell-part numbers are plotted to the identification plate
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