Instructions for assembly and maintenance of the 451 / 851 Series ...

Instructions for assembly andmaintenance of the451 / 851 Series safety valvesModelTÜV-Component Test451 E, 851 E 268451P/N/T, 851P/N/T 318851 H1 541451 H4, 851 H4 665451 bG, 851 bG 666451 bF, 851 bF 6841. Safety guidelines1. Only use the valve– for its intended purpose– if it is in proper operating condition– with respect for safety and potentialhazards.2. The installation instructions must be followedcarefully.3. Any defects which could affect the safeoperation of the valve must be rectifiedimmediately.4. The safety valve is only intended for use forthe range of applications listed in theseinstallation instructions. Any other use, oruse beyond that stipulated, is deemed to benot in accordance with the intendedpurpose.5. The manufacturer’s warranty shall be nulland void if the sealed cover is removed.6. All assembly work must be carried out byauthorised specialists.

Inlet linesInlet lines for safety valves should be as short as possibleand should be designed to ensure that no pressurelosses of more than 3 % of the set pressure can occurwhen the valve is operating under full load.Condensate trappingPipelines must be fitted with a continuously operatingdevice at their lowest point for condensate education thatmight build up. Care must be taken to remove any condensateor medium issuing from the system.The housing, lines and silencers must be protectedagainst freezing.Outlet lines / Back pressureThe outlet lines in the safety valve must be designed insuch a way that in the event of blowout the required massflow can be drawn off without pressure.In the case of safety valves with bellows, a back pressureof up to 4 bar that occurs during blowout will notadversely affect the set pressure of the safety valve.5. Inspection / MarkingThe safety valves have been inspected by us, set to therequired set pressure and lead-sealed.The set pressure is marked on the bonnet (spring cap) asthe last figure of the component inspection code.Fig. 451 E, 451 P/N/T851 E, 851 P/N/Twithout bellowsFig. 451 bF, 451 bG, 451 H4,851 bF, 856 bG, 851 H1,851 H4 with bellows6. Range of applicationsThe range of applications for the different models inthe 451 / 851 Series can be found in the manufacturer’sspecifications (catalogue).

7. Operating / MaintenanceThe operating pressure in the system should be at least5 % less than the reseating pressure of the safety valve.This ensures that the safety valve can close again properlyafter a blowdown.If small leaks occur as a result of impurities lodgingbetween the sealing faces, the valve can be cleaned bygradually raising it until blowdown occurs.In addition, in the case of safety valves without bellowsthe entire top section can be unscrewed from the housingusing a suitable open-ended spanner (not a pipewrench) and any residue on the seat or seating sealremoved.Make sure that the safety valve is not pressurizedbefore removing it.When the top section is screwed back into the housing,the operating pressure will remain unchanged.In the case of safety valves with bellows, the top sectionshould not be removed from the housing, as otherwise aproper seal cannot be guaranteed if back pressureoccurs. The equipment can be cleaned by lifting up thesafety valve. If this does not remedy the leak, the sealingface has probably been damaged. This can only berepaired in our factory or by an authorised specialist.Safety valves with bellows have a relief vent in the springcap. If medium discharges from this hole, it means thatthere is a fault in the safety valve. In such cases, thesafety valve must be overhauled.It is recommended, and is a requirement of the relevantregulations, that the correct operation of the safety valvein each system be regularly checked by lifting up thevalve until it blows down.In accordance with TRD 601 regulations, safety valves insteam generators must be checked every 4 weeks toensure their correct operation.Safety valves are the last line of safety for a tank or system.They should be able to prevent excessive overpressureeven when all other upstream control and monitoringdevices have failed.Like every other piece of technical equipment, safetyvalves require regular servicing to ensure their operationalreadiness.ARMATURENFABRIK GERHARD GÖTZE KGRobert-Mayer-Strasse 21 · D-71636 Ludwigsburg

DECLARATION OF CONFORMITYaccording to Annex VII of Directive 97/23/ECWeArmaturenfabrik Gerhard Götze KG,D-71636 Ludwigsburgdeclare that the productSafety ValveTypeTÜV-TestCertificateEC-type examinationcertificate No.860 312 01 202 111-B- 00028451P/N/T, 851P/N/T 318 01 202 111-B- 00028851 H1 541 01 202 111-B-00029451 H4, 851 H4 665 01 202 111-B-00029451 bG, 851 bG 666 01 202 111-B-00029811 3 / 4“, 1“ 317 01 202 111-B-00026811 1 / 4“, 3 / 8“, 1 / 2“ 382 01 202 111-B-00026651 HN 516 01 202 111-B-00027451 E, 851 E 268 04 202 1 460 03 00020451 bF, 851 bF 684 04 202 1 460 03 00020652, 652 GL 293 01 202 2 046 01 60021to which this declaration is reffering to, is in compliancewith the directive 97/23/EC as well as the national specificationsAD 2000-A2/A4, TRD 421/721 and was subjectedto the following conformity assessment procedure:Modul B+DThere is a EC-type examination certificate for the pressureequipment.The monitoring is performed by TÜV-Süddeutschland (CE0036)Ludwigsburg, 10. 08. 2003(Ort und Datum der Ausstellung)D. Weimann