DIFFERENTIAL PRESSURE GAUGES AND SWITCHES. Differential pressure gauge Differential pressure gauge with electric contacts ASAHI GAUGE MFG. CO.,LTD.

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Dierential Dierential wit electric contacts MODEL No.784785 No.787S789 MODEL No.

1 Dierential Dierential wit electric contacts MODEL No No.787S789 MODEL No.784E787SE789E No.787ME789PE DIFFERENTIAL PRESSURE GAUGES AND SWITHES ASAHI GAUGE MFG. O.,LTD. JAPAN

2 Dierential gauge speciications Item Dierential MPa Note 1 One-side pressure resistance MPa pressure (pressure resistance) Mpa entral angle o dierential Wet parts material asing onnection Tread Note 2 BS SUS Accuracy Element ase Diapragm Allowale amient temperature Fluid Remars Bourdon-tue eccentric type Sealed type Item Bourdon-tue eccentric type S E 787SE 789E 787ME 789PE Pa.MPa 1Pa 4Pa 5Pa.6MPa Dierential MPa.8 1 1Pa 4Pa 5Pa.6MPa Up to te standard pressure Up to te dierential.4 Less tan te graduation.5, is., oters are 1 ontact type Pointer contacts Pointer contacts Micro switc Reed switc Witin 5 times o dierential Note 5 Indication None Note 1: One side pressure resistance means te allowale maximum over dierential pressure. Note 2: Special tread can e manuactured. Note : is availale. Note 4: Products o luoro ruer and cloroprene ruer is availale in addition to NBR. Note 5: Product witout te indicating scale is called te dierential pressure switc. Aout 9 () BS SUS16 BS+ NBR SUS16 +NBR SUS16 +NBR Note 4 Numer o contacts 1 Note Rating AV.5A Metal screw lid Metal screw tigtening Metal screw lid Metal screw lid Resistance load AV 5A Resistance load AV.5A Pipe- - Pipe- - Pipe- - Speciications o te dierential wit contacts and te dierential gauge switces Electric caracteristics Insulation resistance D5V 5 or more Voltage resistance AV 1 minute etween case and terminals Note 6: Product or te current capacity 1A is availale. Note 7: Product wit te micro switc o 5 to 15Pa 1 SPDT witout indication is availale. Speciy as 789M. Note 8: Doule scale o SI unit (inner) and Anoter unit (outer) is availale. Note 9: Diapragm type o dierential pressure switc is or more tan.1mpa. 784-A8 784-A B8 784-B D8 784-D A5 785-A B5 785-B D5 785-D45 ON/OFF dierential 1% 1% 5% 784-A A B B D D S-A81P 787S-A481P 787S-A81L 787S-A481L 789-D951P 789-D951L 789-D981P 789-D981L Indication ±2% ±2% Product name Accuracy Setting ±% ±1% ±2% FS FS FS Repeataility.5% 1% 1% Bourdon-tue Alcove Bellows AD lac A lac AD lac SUS 4 stoc AD lac Setting scale ommon wit te indication scale Aout 5 ommon wit te indication scale Applicale Inapplicale Applicale depending on te condition However, or over te dierential pressure.5mpa ontact adjustment metod Internal or external Internal Internal ontact adjustment range % Upper limit: 1% Lower limit: 9% Pressure-resistance explosion-proo type Adc-w MPa (Internal only) Inapplicale.2,.5,.8,.1,.2,.4,.6 Inapplicale lassiication o -contact ategory o 784E, 787SE, 789E, 787ME and 789PE Ad only or explosion proo type Dierential wit contacts or te dierential pressure switc Liquids Gases lean air, non-corrosive gases Liquids Gases Lead cale outlet Waterproo conduit G 1 /2 wit JIS 15 gland pacing. Wit standard. Wen te ig one side pressure resistance is required, use te pressure equalizing valve wit an over pressure saety valve. Product weigts are listed in te drawings on page and 4. Remars One-side pressure resistance, standard pressure, scale central angle (indication), wet parts materials and case are te same as te dierential in te aove tale. 787ME ollows 789. Product weigts are listed in te drawings on page 5 and 6. Tese speciications are suject to cange witout notice or improvement. Wen ordering Speciy te model, dierential (range), standard pressure, L or H on te standard pressure side and te numer o pressure equalizing valve (wit or witout te over pressure saety valve). Description A dierential is used to measure te pressure dierence rom two dierent measuring ports and indicates te dierential pressure on te dial. Application (1) Measurement o te tan level (2) Flow rate measurement o te pipe line (Flow rate graduation is availale.) y comining wit an oriice () Detection o te ilter clogging autions to use dierential s (1) Te standard pressure is scaled as (+) graduation wen it is on te L side. (2) It may cause te indication ailure i te excessive pressure over one-side pressure resistance is loaded onto only one o te pressure connection ports, tereore te use o maniold valve is recommended. () Normal dierential pressure range sould e 1/2 to 2/ o te maximum value. (4) For 787S and 789, release air troug te air vent located on te top. Features ( ) means to e equipped wit contacts 784 (784E) S (787SE) (787ME) 789 (789E) (789PE) Name Bourdon-tue eccentric type dierential Sealed type dierential dierential (Low-rangedierential ) dierential Features * Two Bourdon-tues receive pressure rom two ports respectively and te dierence o displacement is indicated y te lin mecanism. * Wet parts are availale all in SUS16. * 784E is te dierential wit te pointer contacts. * Te case applies te enclosed structure, and te dierential pressure etween element internal pressure and case internal pressure is indicated y te lin mecanism. * Low-range-dierential pressure. * Applicale or clean non-corrosive gas. * Inside and outside o one ellows receives pressure rom two places, and te dierence o displacement is indicated y te lin mecanism. * 787SE is te dierential wit te pointer contacts. * 787ME is te dierential wit te micro switc. * Hig pressure resistance. * Tis gauge uses te same principle as 787S, ut te dierential range is comparatively wide. * 789E is te dierential wit te pointer contacts. * 789PE is te dierential wit te reed switc. * Hig pressure resistance. Equalizing valve 21BV It is inevitale to use a pressureequalizing device to load te equal pressure to ot inlet ports o te dierential. On your order o te equalizing valve: Material d2d2 1 g1 L1M1 2 H SUS Bs 21BV-U 21BV-U44 21BV-B 21BV-B44 /8/8 1/21/2 /8/8 1/21/ (1) Speciy te model and te dierential model to attac wen ordering. (2) Wen te ig one side pressure is loaded, use te pressure equalizing valve wit an over pressure saety valve. () Dimension o (a) part varies depending on te dierential type. (4) Witstand pressure is 1MPa a 45 L1M g1 aout H PF d ontacts and wiring metod ontacts Wiring metod Pointer contact type 784E 787SE 789E Reed switcing type 789PE Microswitcing type 787ME Upper limit one contact H Setting Lower limit one contact L Setting Upper and lower limits HL Setting Setting Upper limit one contact H Setting Wiring metod A- Lower limit one contact L Setting Wiring metod B- Upper and lower limits HL Setting Wiring metod H- Setting Wiring metod L- H L A B N N means B contact 1 2

Dierential 784 Bourdon-tue eccentric type

onnection tread d 42 44 785 Enclosed type

5PD1 Depends on your speciication. 87 2 2-5.

3 Dierential 784 Bourdon-tue eccentric type Weigt: Aout 2.g () onnection tread d -5.5 drill 165PD Fixture onnection tread d 14 onnection tread d Enclosed type Weigt: Aout 1.5g PD1 Depends on your speciication E PD Depends on your speciication pressure port W di pressure port points or Fixture Depends on your speciication. / onnection tread d 98 onnection tread d

4 787S Weigt: Aout 5g type type onnection tread d 789 Weigt: Aout 2.7g or Aout.2g or type 7 D R 1 /4 WITH FILTER 47 9 D D951L 789-D981L type 7 7 D WITH FILTER D D951P 789-D981P Note: (M) and (M) treads or te pressure inlet part are availale. 4

5 Dierential wit contacts 784E Bourdon-tue eccentric type wit pointer contacts c Waterproo Pacing ole 11 or te gland pacing Weigt: Aout 2.6g () 76 ontact numer PD onnection tread d c 8 68 G1/2 11 onnection tread d pressure port L Waterproo Pacing ole 11 or te gland pacing Band type ixture 24 2 SUS 784E-A E-A E-A E-A E-B E-B E-B E-B E-D E-D SE wit contacts type Weigt: Aout 5.4g type 5 76 JIS JIS15 787SE-A81L-1 787SE-A81L-2 787SE-A481L-1 787SE-A481L-2 onnection tread d 787SE-A81P-1 787SE-A81P-2 787SE-A481P-1 787SE-A481P-2 789E wit pointer contacts Weigt: Aout g E-D951P-1 789E-D951P-2 789E-D951L-1 789E-D951L-2 JIS R1/4 WITH FILTER For te dimensions in te case o panel, reer to te drawing o 789. Note: (M) and (M) treads or te pressure inlet part are availale. 5

787ME Wit micro switc Weigt: Aout 4.1g () atyre cale ole 11 -.

6 787ME Wit micro switc Weigt: Aout 4.1g () atyre cale ole PD165 Gland Setting scale Waterproo onnection tread d Pacing ole 11 or te gland pacing onnection tread d onnection tread d atyre cale ole 11 Gland 787ME-A ME-A ME-A ME-A ME-B ME-B ME-B ME-B ME-D ME-D ME-D ME-D481-2 Note: 2-contact is not supplied wit te indication scale. (Setting scale only) 789ME Wit micro switc type Weigt: Aout g type 789ME-D951P-1 789ME-D951P-2 789ME-D951L-1 789ME-D951L-2 789PE Wit reed switc type Setting pointer type Weigt: Aout g Waterproo Pacing ole 11 or te gland pacing 789PE-D951P-1 789PE-D951P-2 789PE-D951L-1 789PE-D951L-2 6

Panel-Mounting Flowmeters Purge Set (Flowmeter with Constant Flow Valve)

Panel-Mounting Flowmeters Purge Set (Flowmeter with Constant Flow Valve) When working pressure change, inside diaphragm and needle valve operates in order to always keeping a fixed flow rate for exact