. Features Contamination Indicators Filter elements are economically used only if their dirt holding capacity is fully exploited. This is achieved by using filter housingswith a contamination indicator. MAHLE manufactures contamination indicators of the following designs: Differentialpressureindicators Pressure indicators/pressure switches Vacuumswitches/manometers With any filter element the collection of dirt particles continously reduces the number of open pores or, in other words. The opencross sectionfor allowing the liquid to flow is continously reduced. Thus the pressure on the upstream side ofthe element. (dirt side) increases continously. With pressure filters, the pressure is measured upstream and downstream of the filter element (differential pressure). With returnline filters the pressure is measured only onthe upstream side because, depending on the tank design, atmospheric pressure exits onthe downstream side of the filter element is measured analog. A piston with attached magnet is moved againstthe force of a spring, with which the indicating point is determined by the pistonsurface. A homopolar poled magnet is fitted in the outer part in the indicating button. The closer the pole-springs move towards each other, the stronger is the force with the magnets mutually repel, until finallythe red button on the indicator pops out. This red button remains visible until it is pushed in during the daily check which is to be performed while the plant is at operating temperature. If the button pops out immediately after being pushed in, the filter element must be replaced latest atthe end ofthe shift. This mechanical/ function indication may also be used for generating contactless electrical signals. For this purpose anelectrical upper part is pushed over the hydraulic/ mechanical part. This upper part incorporates all electrical switching elements. Cable connection isvia a DIN cube plug. Visual and electrical indicatorwith standard checkfunction Normallyopen/normallyclosedcombination-standardfeature Electrical funktion, easyto install at a latertime Two-step indication, at 7% and 00% optional Signallockoutuptoapprox.0 Coptional Pressure upto 0 (pressure/differential pressure) upto 60 (differential pressure) upto 0 (differential pressure) Rugged,non-bypassdesign Optimal element exploitation Worldwidedistribution MAHLE Filtersysteme GmbH Bereich Industriefilter Postfach 09 760 Öhrin gen Telefon(079 ) 67-0 Telefax (079 ) 67-9
. Differential pressure indicator Fig. Operating pressure/ temperature Indicator setting Indication Contact type* Fig. Type Part number Material lower upper section section Fig. a 0 0to +0 C, / PIS 087 +a PIS 086 +a PIS 0 77 899 0 77 7 8 699 Al PIS 098 766 997, PIS 097 766 99 8 / +a PIS 6 80 807,7 /, +a PIS 9 PIS 0 PIS 80 9 80 8 88 6 Fig. 60 0to +0 C, vis./el. +a PIS 098 PIS 097 PIS 098 79 88 8 66 8 766 998 9 AL,0 PIS 097 766 99 Fig. a,7 /,0 / +a +a PIS 6 PIS 9 PIS 0 PIS 80 808 80 9 0 80 8 7 88 66 PIS 09 766 989 8, PIS 09 766 98 6 Fig.,7 /, / +a +a PIS PIS 0 PIS 0 PIS 80 80 797 08 7 79 9 88 6 0 Fig. a 00 0to +0 C,0,7 /,0 / +a +a PIS 09 PIS 09 PIS PIS 0 PIS 0 PIS 766 99 766 986 80 80 8 797 09 79 7 88 6 8 Ms PIS 09 766 988 0 8,0 / +a PIS 09 PIS 766 987 80 806 6 0 0to +0 C,,0 vis./el. vis./el. +a +a PIS 9 PIS 9 PIS 9 PIS 9 78 06 80 88 8.0 80 8 8 80 8 6. Pressure indicator/pressure switch Operating pressure/ temperature Indicator setting Indication Contact type* Fig. Type Part number PIS 08 766 978, PIS 08 766 980 7 0 0to +80 C 0,9 /, / +a +a PIS PIS 06 PIS 0 PIS PIS 08 80 80 80 9 79 7 0 88 67 6 77 780,,7 /, / +a +a PIS 08 PIS PIS 06 PIS 0 PIS 77 80 80 8 0 8 80 88 0 797 0 9 88 68 9, norm. open norm. closed DSS/, DSO/, 786 8 787 08 7 0 to +8 C, norm. open norm. closed DSS/, DSO/, 78 8 787 09,0 norm. open norm. closed DSS/ DSO/ 786 8 787 060 *Contacttype: ) Normallyopen/normallyclosed, wiring box DIN 60, max. 0V, max., A ) Normallyclosed, setting points (7% / 00%); wiring box DIN 60, max. 0V, max. A ) Change overcontact; wiring box DIN 60, max. 0V, max. A ) Change overcontact; setting points (7% / 00%); LED; wiring box DIN 6, 0 0V, max. A ) Normallyclosed; setting points (7% / 00%), signal suppression; wiring box DIN 6, 0 0V, max. A
. Vacuum switch Permissible overpressure max. Temperature Indicator setting Contact type Fig. Connection size Type Partnumber lower section Material upper section 0, 0to+70 C to 80 m 0to 600 m single pole double-throw cut-out switch 6 PIS 070 766 969 0 766 97 GD-Al 0, 0 to +80 C, +0 C 00 m ± 0 00 m ± 0 0 m± 0 m± 7 (außen) M0x (innen) HES 00 BP HEO 00 BP LES 0 I LEO 0 I 80 889 80 890 0 80 89 8 80 89 6 GD-ZnAl Polycarbonat Fig. 6 Fig. 7 Conn. size G HES/HEO Type HEC/HEOfor hydraulic application, types LEO/LESforairapplication. Vacuum meter / manometer Nominal size (NG) mm Specification Indicating range Fig. Connection size Partnumber Class Dial face 0 0 Vacuum meter Manometer to +, to + 0,6 0to 0to6 8 9 0 R (conical) R (conical) 6 7 7 90 8 76 7 8 88 99 8 min., white Red/green area, sep. line 0, white Red/green area, sep. line, green Fig. 8 Fig. 9 Fig. 0 red Measuring level, green red 6. Vacuum indicator / air filter Indicator setting ±0% Temperature Fig. Execution Type Partnumber Indication 0 m 6 m 0 to +0 C TB 7 TB 7/ TB 76/ 80 90 6 80 906 80 90 9 indication selflocking Fig. Indication: Position of the piston at nominal valve in m Execution Execution Standard sealing material: Sealing material types LEO / LES: NBR Silicone rubber
7. Accessories 7. Seal kits Types PIS 09, 09, 0, 0,,, 9, 9 PIS 0, 09, 0, 097, 098, 6 PIS 08, 08, 0, 06,, PIS 086, 087, 0 NBR 776 07 776 00 9 88 8 776 0 7. Electrical upper sections Specification Part number FPM 776 08 776 0 7 88 9 0 776 0 9 Electrical upper section / Normally closed for PIS 08, 09, 098, 9 (Contacttype ) Wiring box with lamp insert 0 V for electrical uppersection Normallyopen (acc. to DIN 60) Electrical upper section Change over contact forpis08,087,09,098,9(contacttype) Wiring box with LED's 0 0 V for electrical upper section change overcontact (acc. to DIN 60) Electrical upper section with signal suppression (PIS 00) EPDM 776 09 776 0 88 0 8 Part number 7 6 0 80 7 8 80 80 7 80 80 776 7 8. Function Themagnetic field as previously described, contactless operates Reed contacts in the electrical upper part. The desired contact type is selected by inverting upper part. Another option keeping the electrical signal electronically suppressed up to 0 C operating temperature is also available. This eliminates false electrical signal during the cold start phase. For efficient servicing it is desirable to have a pre-warning device (so that the filter element can be replaced, e.g. with the next tool change). For this purpose electrical upper parts with two indicating points, i.e. at 7% and at 00% of the indicator setting are available. Pressure/vacuum manometers givean analog reading of theexisting stateof contamination of the filter elements. They require continous control to ensure that the service time and reserve capacity are not unduly exceeded. If the contamination signal is disregarded, the filter element may collapse or, if a bypass valve is installed, part of the contaminated fluid may reach the hydraulic components via the bypass valve and cause failure of thehydraulics. Pressure/vacuum switches are provided with snapaction switches, which ascertains that signal are issued only when thelimitvalues havebeen fully reached. 7. Mounting block Mounting blockfor differential pressure indicators, exceptional types PIS 086, 087, 0 Specification Mounting block (Material St) Mounting block (Material.0 ) Part number 780 909 8 769 8 7 R S R=cleanside S=dirtside Dirt holding capacity- p curve 7. Protection cap Protection capforall differential pressure and pressure indicators Part number: 88 0 resistant to: gasoil purifyingagent insolation dust salt water concret Temperature : 0 C to +80 C p[] signal step contamination indicator 00% signal step contamination indicator 7% dirt holding capacity [g]
9. Technical Data 9. Contact type normally open/normally closed TypenPIS08,086,09,097,9 0V~/=, A 60VA/0W Inrush current: 70VA IP 6 when inserted and secured normally open / normally closed Cable connection: PG v 6 0 The electrical indicatorfunction can be changed from the NormallyOpen position to the Normally Closed position or visa versa by inverting the electrical section. With the inrush current of 70 VAtheindicatorcantrigger small contactors or contactor relays. Inductivity in the direct current may require the use of a signal eraser. The electric sections are shockproof (plastic housing) 9. Contact type normally closed step/signallock-out Types PIS,, Signal lock-out by thermorelay Signal is released at 0 C reset at 0 C. indicating at 7%. indicating at 00% ofthe indicating pressure forfurthertechnical details see 9. 0 0V= A 0 W 9. Contact type change-over contact Types PIS, 6, forfurthertechnical details see 9. 0V~/= A 0VA/0W 9. Contact type normally closed/signal lock-out Type PIS 00 Signal lock-out by thermorelay Signal is released at 0 C,reset at 0 C forfurthertechnical details see 9. 9. Contact type normally closed step Types PIS 0, 06, 9. indicating at 7%. indicating at 00% ofthe indicating pressure 0V~/= A 0VA/0W forfurthertechnical details see 9. 9.6 Contact type change-over contact/ step LED Types PIS 0, 0, 0 0 0V= A 0VA/0W. indicating at 7%. indicating at 00% ofthe indicating pressure forfurthertechnical details see 9. switch cover connector indicatorsetting 00% LED red indicator setting 7% LED yellow stand-by indication LED green
9.7 Wiring boxwith lamp insert will be supplied instead of standard connection Voltage: 0 V~ /= not to combine with indicators with setting points. switch cover connector 9. Vacuum switch PIS 070 0V~/= 6 A Single pole changeover switch Electrical connections: AMP 6,DIN 68 DIN 67 IP 00 - without cover IP -with cover Connecting plan supplyline operatingcontact normallyclosed contact adjustingscrew 9.8 Wiring boxwith lamp insert will be supplied instead of standard connection plug Voltage: 0 0 V = to combinewith PIS, 6, switch cover green connector yellow 9. Pressure switch DSS Contact load: Duty classification: V A 00VA 00/min IP 00 -without protecting cap IP 6 with protecting cap Electrical connections: AMP 6,DIN 68 DIN 67 terminal screw 9.9 Vacuum switch HES / LES Contact load: HES: V / 6 W LES: V/ 6 W IP - with protecting cap Electrical connections: AMP 6,DIN 68 DIN 67 9.Pressure switch DSO forfurthertechnical details see 9. 9.0 Vacuum switch HEO / LEO Contact load: HEO: V / 6 Wat resistive load LEO: V/ 6 Wat resistive load forfurthertechnical details see 9.9 Subjectto technical alteration without prior notice. MAHLE Filtersysteme GmbH Bereich Industriefilter Schleifbachweg D-76Öhringen Postfach 09 D-760Öhringen Telefon (0 79 ) 67-0 Telefax (0 79 ) 67-9 Internet:http://www.mahle.com E-mail:ub.industrie@mahle.com Printed in Germany/ImpriméenAllemagne 07/0Ba 000 8.7.8