Check Valves - LOHSE Armaturenbau und · PDF file280 subject to change ® Swing Check Valves Type ZRK / ZRKF 281 Dual Plate Check Valves Type 915 293 Disco Check Valves Type 930 303

®

MARTIN LOHSE GmbH

Unteres Paradies 63 · D-89522 Heidenheim

Postfach 1565 · D-89505 Heidenheim

phone +49(0)7321 / 755-42 · fax +49(0)7321 / 755-97

[email protected]

www.lohse-gmbh.de

Check Valves

subject to change280

®

Swing Check Valves Type ZRK / ZRKF 281

Dual Plate Check Valves Type 915 293

Disco Check ValvesType 932 303

Check ValvesMARTIN LOHSE GmbH

Ver. 1816

®

MARTIN LOHSE GmbH



phone +49(0)7321 / 755-42 · fax +49(0)7321 / 755-97

[email protected]

www.lohse-gmbh.de

Type ZRK / ZRKFSwing Check Valves


®Swing Check ValvesType: ZRK / ZRKF

Design 283

Description and application purpose 284

Function 284

Dimensions, pressure range 285

List of spare parts 286

Dimensions 287

Opening pressure, Tightness, Pressure loss 288

Weights 289

Operating instructions 290

Type code, Order example 292

Ver. 1711

subject to change 283

®

Design Body Disc Spring Seals Pressure range

GGG40-ST GGG40, zinc plated

Steel 1.0619, zinc plated

Stainless steel 1.4571

NBR, EPDM,

FPM (Viton)or

PTF

0 to 16 bar

ST-ST Steel 1.0619, zinc plated

ST1-ST Steel (C22.8), zinc plated

ST-VA Steel 1.0619, zinc plated

Stainless steel 1.4408/1.4581

NBR, EPDM,

FPM (Viton),PTFE

or metal seated

VA-VA Stainless steel 1.4408

VA1-VA1 Stainless steel1.4571

Stainless steel 1.4571

AB-AB Alu bronze 2.0975 Alu bronze 2.0975

Hastelloy C4 (2.4610)

NBR, EPDM,

FPM (Viton)or

PTFE

DU-DU Duplex 1.4469 Duplex 1.4469

Swing Check ValvesType: ZRK / ZRKF

Design

Ver. 1345


®

Ver. 1249

Swing check valves are armatures (valves) for return fl ow prevention in piping systems. Easy structures and short dimensions are the remarkable features of ZRK-ZRKF-swing check valves. They are constructed to be mounted directly bet-ween fl anges acc. to DIN. Swing check valves of type ZRK-ZRKF are suitable for industrial employment in piping systems for transport of liquid and gaseous fl uids of group 1 (explosive, infl ammable, toxic, incendiary) and group 2 (allother) according to Pressure Equipment Directive 97/23/EC. They are not suitable for media with solid components.

Type: ZRK / ZRKF

Description and application purpose

The swing check valves are automatically held in a central position by the fl ange connection screws (pos. 6). An O-ring (pos. 5) seals the equipment and protects it from external effects. Therefore, we recommend to use fl anges with clean sealing surfaces. AWS swing check valves require a low opening pressure. The resulting opening power directs the valve against a spring1) (page 5, DN 32 – 40, pos. 7) and the valve’s weight power (pos. 2), so that the media is released.If the initial pressure is higher than the entrance pressure, the valve closes and is sealed by the O-ring2) (pos. 5) to protect it from the media.

ZRK-ZRKF-swing check valves do not require maintenance.

Function

Swing check valve,

no load

Spring-actuated swing

check valve (optional)

1) only design ZRKF2) only design with O-ring

otherwise metal seated

Swing Check Valves


®

Ver. 1249

Type: ZRK / ZRKF

To guarantee the compatibility with the fl uid we offer 5 variants of seal material:

Max. working temperature

N = NBR -10 to +90°C

E = EPDM -10 to +120°C

F = FPM (Viton) -10 to +150°C

T = PTFE -10 to +200°C

M = metal seated -10 to +300°C

Dimensions, pressure range

PS 16 = DN 32 / 40 / 50 / 65 / 80 / 100 / 125 / 150 / 200 / 250 / 300PS 10 = DN 350 / 400 / 500 / 600

Swing Check Valves


®

Ver. 1324

Type: ZRK / ZRKF

DN 32 to DN 40

List of spare parts

DN 50 to DN 125

DN 150 to DN 300

Item Designation

1 Body

2 Disc

3 Screw

4 Ringschraube

5 O-ring

6 O-ring

7 Spring

8 Pivot

9 Jig

10 Plate

11 Jig for pin

12 Screws

13 Pin for spring

14 Spring right

15 Spring left

Swing Check Valves


®

Ver. 1434

Type: ZRK / ZRKF

Dimensions

DN

Flange connectionwithoutspring

withspring C D E DRPN 6 PN 10 PN 16 PN 25 PN40 PN 64 ANSI

150ANSI 300

A A A A A A A A B B

32 79 85 85 85 85 - 74 85.9 15 15 18 59 22 37

40 89 95 95 95 95 106 83 98.6 16 16 22 72 23 43

50 98 109 109 109 109 115 105 114.4 14 14 32 86 37 54

65 118 129 129 129 129 140 124 133.7 14 14 40 109 50 70

80 134 144 144 144 144 150 137 152.4 14 14 54 119 61 82

100 154 164 164 170 170 176 175 184.5 18 18 70 146 77 106

125 184 195 195 196 196 214 197 219.3 18 18 92 173 98 131

150 209 220 220 226 226 251 222 254 20 20 112 197 120 159

200 264 275 275 286 294 313 279 311.2 22 22 154 255 160 207

250 319 330 331 344 356 368 340 365 26 26 192 312 190 260

300 375 380 386 404 421 428 410 245.6 32 32 227 363 220 309

350 425 440 446 461 478 490 451 489 38 – 266 416 250 341

400 475 491 499 518 550 547 514 543.1 44 – 310 467 290 392

450 – 541 558 – – – 549 600.3 52 – 350 520 340 442

500 580 596 621 628 632 – 606 657.4 58 – 400 550 390 493

600 681 698 738 735 – – 718 777.7 62 – 486 660 470 595

Dimensions in mm.

Swing Check Valves


®Type: ZRK / ZRKF

DN[mm]

Kv-value[m³/h]

Opening pressure [mbar] at fl ow direction

without spring with spring without

spring with spring

32 16,2

~ 2 ~ 15 ~ 10

~ 25

40 22,2

50 54

65 75

80 112

100 172

125 342

150 490

200 1128 ~ 4~ 17

~ 14250 1500

~ 6

300 2290

~ 18

350 2890

~ 18

~ 27

400 3700~ 28

450 5000

500 6550 ~ 24 ~ 34

600 9500 ~ 26 ~ 36

Min. opening pressure

Tightness A minimum back pressure of 0.3 bar is required to keep the swing check valves tight.

Pressure loss diagram

The values in the diagram refer to water at 20°C. If you need information on other fl uids, please contact us.

Swing Check Valves

Ver. 1324


®Type: ZRK / ZRKF Swing Check Valves

Ver. 1504

DN[mm]

PN 10[kg]

PN 16[kg]

PN 25[kg]

PN 40[kg]

ANSI 150[kg]

32 0.5 0.4

40 0.78 0.65

50 0.9 0.85

65 1.25 1.14

80 1.5 1.35

100 2.4 2.6 2.7

125 3.3 3.35 3.4

150 4.6 4.95 4.7

200 7.5 8.3 9.1 7.8

250 13.1 14.4 16.1 15.1

300 21.3 22.3 25.0 28.0 26.0

Weights ZRK

DN[mm]

PN 10[kg]

PN 16[kg]

PN 25[kg]

PN 40[kg]

ANSI 150[kg]

32 0.5 0.4

40 0.78 0.65

50 0.85 0.83

65 1.225 1.22

80 1.5 1.38

100 2.4 2.48 2.8

125 3.3 3.33 3.5

150 4.6 4.9 4.7

200 7.49 8.3 9.0 7.9

250 13.1 14.6 15.9 15.3

300 21.3 22.3 25.0 28.0 26.0

Weights ZRKF

Weights


®Type: ZRK / ZRKF Swing Check Valves

Ver. 1324

Operating instructions

ZRK-ZRKF-swing check valves are designed to block media on one side of the pipe within allowable pressure and temperature limits (see data sheet) and to be installed in a pipe system only. They are only to be used with media, which the material and the seals are resistant to. They are not suitable for media with solidcomponents.

General safety advicesThe safety advices for the pipe system, in which the valves are to be mounted, are to be followed. The same applies to the swing check valves.

Demands on the userIn pipe systems, where our swing check valves are to be used, the planning/ins-talling person and the operator are responsible for the following issues: • The swing check valves is to be used according to the regulation in p.1. • The pipe system is to be installed correctly and its operation is to be checked

regularly. • The swing check valves is to be mounted, removed and repaired by qualifi ed

personnel only. The staff is to be regularly instructed according to all relevant regulations concerning working safety and environmental protection, espe-cially in the fi eld of pipes under pressure.

• These staff members have to be informed about the manual and the advices included.

Special risksBefore the swing check valve is being removed, pressure has to be completely taken off the plant to avoid media escaping from the pipe. Fluid being left in thepipe must be drained off. Fluid, which has remained in the valve and comes out during removal, is to be collected. If hazardous fl uids or gases are left in the valves, the safety measurements required must be taken.

Lagerung: • Swing check valves are to be transported in their original packaging and to be

stored in a clean location. • Swing check valves include sealing elements consisting of organic material,

that reacts to environmental effects. Therefore, they are to be stored in a place, which is also to be kept as cool, dry and dark as possible.

• The front and back sides of the swing check valves must not be mechanically damaged.

Transport:The personnel must pay special attention, when big swing check valves (> DN 100) are unpacked and transported. The valve is to be held in a horizontalposition in a way, that it can open at the top only. This is to avoid, that the valve unintentionally drops down and is damaged.

correct and improper handling

1. Appropriate use in accordance to designed capabilities

2. Safety advices

3. Storage and transport

CAUTION!

CAUTION!


®

The following aspects are to be considered during the installation of swing check valves: • Possible damages to the swing check valves and O-rings are to be checked

prior to installation. Check if the valve can be moved. Damaged parts must not be installed.

• Make sure that only those swing check valves are being installed, that meet the operational requirements regarding pressure category, chemical resi-stance, connection and dimensions.

• Make sure to install a minimum of 5 x nominal diameter of straight pipeline in front of and behind the swing check valve.

• Exit supports allow a greater opening angle and higher throughput values (see diagram).

• Do not install the valves directly onto a pump fl ange. • Avoid pulsation and pressure impact. • Vertical throughput is allowable only if the valve can open at the top. • In case of horizontal throughput, the ring screw must be at the top (see dia-

gram). • Watch throughput direction (see arrow on the plate)! • The swing check valves are placed between the fl anges by means of a ring

screw. They are put in their central position according to the outer diameter of the case and the fl ange screw inner side.

• Tighten the fl ange screws crosswise regarding the torque required (see data sheet).

After the installation is fi nished, check the tightness of the connections by a pressure check.

4. Installation instructions, start-up

5. Assistance in case of malfunctions, repairIt is absolutely necessary to read and follow the safety advices before removing the valves (p. 2)! Loosen the fl ange screws and pull out the swing check valve by means of the ring screw. Spare part orders are to be placed at our company and must include the complete data, listed on the plate. Original spare parts are to be installed only. Take off the spring (option) and unscrew the 2 screws. Then, the O-ring or the valve can be replaced. To install the valve, follow the instruc-tions in reversed order.

Type: ZRK / ZRKF Swing Check Valves

Ver. 1324


®

Ver. 1345

Type: ZRK / ZRKF Swing Check Valves

Type code Typ Material Gehäuse Material Klappe Nennweite DN Dichtungen

ZRK GGG40 = GGG40, zinc plated ST = Steel A216 (WCB), zinc plated 32 bis 1200 N = NBR

ZRKF ST = Steel A216 (WCB), zinc plated

VA = Stainless steel AISI 316 Ti F = FPM (Viton)

ST1 = Steel (C22.8), zinc plated

VA1 = Stainless steel AISI 316 Ti E = EPDM

VA = Stainless steel CF8M AB = Alubronze 2.0975 T = PTFE (Tefl on)

VA1 = Stainless steel AISI 316 Ti DU = Duplex 1.4469 M = metal seated

AB = Alu bronze 2.0975

DU = Duplex 1.4469

Order example ZRKF - ST - ST - 200 - N - F1ZRKF Swing check valve design ZRKF (with spring reset)ST Body made of steel (C22.8), zinc platedST Disc made of steel A 216 (WCB), zinc plated200 Nominal diameter 200N Seals NBRF1 Spring Stainless steel AISI 316 Ti

®

MARTIN LOHSE GmbH



phone +49(0)7321 / 755-42 · fax +49(0)7321 / 755-97

[email protected]

www.lohse-gmbh.de

Type 915Dual Plate Check Valves


®Check ValvesType: 915

Design 295

Description, function 296

Dimensions 297

Opening pressure, Tightness 298

Pressure loss 299


Type code, Order Example 302

Ver. 1711


®

Design Body Plate Stem Spring Seals Pressure range

1

GGG-40 (ductile iron)

GGG-40 (ductile iron)

Stainless steel

Stainless steel

NBR, EPDM,

FPM (Viton)0 to 16 bar

2 Alu bronze C954

3 Stainless steel

4Stainless

steel1.4408

Stainless steel

1.4408

Stainless steel

1.4404

Stainless steel

1.4401

6 Alu bronze C954

Inconel 600

7 Duplex 1.4469

8 Hastelloy

Check ValvesType: 915

Design

Ver. 1324


®

Easy structures and short dimensions (acc. to DIN EN 558-1, line 16 or API 594) are the remarkable features of dual plate check valves type 915. They are to be directly mounted between DIN fl anges (PN 10, PN 16 or ANSI 150).

Dual plate check valves type 915 require a low opening pressure. The resulting opening power directs the stems against the spring and the valve’s weight pow-er, so that the media is released. If the initial pressure is higher than the entran-ce pressure, the valve closes and is sealed by the O-ring to protect it from the media.

Dual plate check valves type 915 do not require maintenance.

Description, function


Ver. 1324


®

Dimensions

DN A B CD E

[mm] [inch] PN 10 PN 16 ANSI 150 [mm] DIN EN 558-1 API 594

50 2 107 101 70,5 43 60 28,8 19

65 2,5 127 121 80 46 67 36,1 20

80 3 142 134 94 64 73 43.4 28

100 4 162 171 117 64 73 52.8 27

125 5 19 193 145 70 – 65.7 30

150 6 218 219 180 76 98 78.6 31

200 8 273 276 221 89 127 104.4 33

250 10 328 336 275.5 114 146 127 50

300 12 378 383 406 325.5 114 181 148.3 43

350 14 438 444 448 360 127 184 172.4 45

400 16 489 495 511 410 140 191 197.4 52

450 18 539 555 546 467 152 203 217.8 58

500 20 591 617 603 515 152 219 241 58

600 24 695 734 714 624 178 222 295.4 73

Face to face according to: DIN EN558-1 row16 (DIN3202 / K3)Flange according to: DIN EN 1092-1 PN10/16

Face to face according to: DIN EN558-1 row16 (DIN3202 / K3)Flange according to: ANSI B16,5 150LBS

Face to face according to: API 594Flange according to: ANSI B16,5 150LBS

Ver. 1434



®

Min. opening pressure

Tightness Leak rate according to: DIN EN 12266 or API 598


Ver. 1324

DN NPS Kv-valueOpening pressure at fl ow direction

[mm] [inch] [m³/h] [mbar]

50 2 63

15

20

10

65 2.5 109

80 3 172

100 4 289

125 5 476

150 6 750

200 8 1550

250 10 2880

–

300 12 4100

350 14 5276

400 16 8250

30450 18 10550

500 20 14500

600 24 24000

700 28 27000

40800 32 31241

900 36 39539

1000 40 48814


®

Pressure loss diagramDurchfl ussvolumen[Wasser] Vw [m3/h] DN

Flow volume[water] Vw [m3/h]

Druckverlust pin mbar

Pressure drop pmbar

Type: 915 Check Valves

Ver. 1324


®


Dual plate check valves type 915 are designed to block media on one side of the pipe within allowable pressure and temperature limits (see data sheet) and to be installed in a pipe system only. They are only to be used with media, which the material and the seals are resistant to. They are not suitable for media with solid components.

General safety advicesThe safety advices for the pipe system, in which the valves are to be mounted, are to be followed. The same applies to the dual plate check valves.

Demands on the userIn pipe systems, where our dual plate check valves are to be used, the planning/installing person and the operator are responsible for the following issues: • The dual plate check valves is to be used according to the regulation in p.1 • The pipe system is to be installed correctly and its operation is to be checked

regularly. • The dual plate check valves is to be mounted, removed and repaired by

qualifi ed personnel only. The staff is to be regularly instructed according to all relevant regulations concerning working safety and environmental protec-tion, especially in the fi eld of pipes under pressure.

• These staff members have to be informed about the manual and the advices included.

Special risksBefore the dual plate check valve is being removed, pressure has to be comple-tely taken off the plant to avoid media escaping from the pipe. Fluid being left in the pipe must be drained off. Fluid, which has remained in the valve and comes out during removal, is to be collected. If hazardous fl uids or gases are left in the valves, the safety measurements required must be taken..

• Dual plate check valves are to be transported in their original packaging and to be stored in a clean location.

• Dual plate check valves include sealing elements consisting of organic mate-rial, that reacts to environmental effects. Therefore, they are to be stored in a place, which is also to be kept as cool, dry and dark as possible.

• The front and back sides of the dual plate check valves must not be mechani-cally damaged..

CAUTION!

1. Appropriate use in accordance to designed capabilities

2. Safety advices

3. Storage


Ver. 1324


®

The following aspects are to be considered during the installation of swing check valves: • Possible damages to the dual check valves and O-rings are to be checked pri-

or to installation. Check if the valve can be moved. Damaged parts must not be installed.

• Make sure that only those swing check valves are being installed, that meet the operational requirements regarding pressure category, chemical resi-stance, connection and dimensions.

• Make sure to install a minimum of 5 x nominal diameter of straight pipeline in front of and behind the swing check valve.

• In horizontal pipeline make sure that the stem of armature is in vertical positi-on (see pic.)

• Do not install the valves directly onto a pump fl ange. • Avoid pulsation and pressure impact. • Vertical throughput is allowable only if the valve can open at the top. • Watch throughput direction (see arrow on the plate)! • The dual plate check valves are put in their central position according to the

outer diameter of the case and the fl ange screw inner side. • Tighten the fl ange screws crosswise regarding the torque required (see data

sheet).

After the installation is fi nished, check the tightness of the connections by a pressure check.


5. Assistance in case of malfunctions, repairIt is absolutely necessary to read and follow the safety advices before removing the valves (p. 2)! Loosen the fl ange screws and pull out the dual plate check valve. Spare part orders are to be placed at our company and must include the complete data, listed on the plate. Original spare parts are to be installed only..


Ver. 1324


®

Type codeType

DNDesign

Material

Size Body Plate Stem Spring Hexagon set srew Seal

91550to

6001

GGG-40ductile

iron

GGG-40 ductile

iron

Stainless steel

M = metal seated

2 Alu bronze E = EPDM

3

CF8M

V = Viton

4 CF8M F = FPM/FKM

6 C954 Alu bronze

Inconel 600

C954 Alu bronze N = NBR

7 Duplex 1.4469 Duplex 1.4469

8 Hastelloy

Order example 915 / 200 / 1 / N / F1915 Dual plate check valve type 915200 Size 2001 Body GGG-40 Plate GGG-40 Stem, Sprin, Hex. set Screw Stainless SteelN Seal NBRF1 With reset spring Stainless Steel AISI 316 Ti


Ver. 1324

®

MARTIN LOHSE GmbH



phone +49(0)7321 / 755-42 · fax +49(0)7321 / 755-97

[email protected]

www.lohse-gmbh.de

Type 932Disco Check Valves


®Disco Check Valves

Content

Type: 932

Description and application 305

Function 305

Dimensions 306

Opening pressure, Tightness, Working Temperature 308

Pressure loss 309


Type code, Order example 312

Ver. 1816


®

Ver. 1707

Disco check valves are fi ttings for the backfl ow prevention in pipe systems.Easy structures and short dimensions (1) according to DIN EN 558-1, row 49) are the remarkable features of disco check valves type 930. They offer an optimum solution in case of bigger nominal widths and there, where connection fl ange mountings are required or more favorable. The disco check valves type 930 are suitable for the industrial use in pipe systems for the transport of liquid or ga-seous materials as well as in systems where much higher demands are made on the material.

Description and application

Disco check valves type 930 may have any mounting position.They are opened by means of the medium pressure and closed again by means of a spring, prior to the creation of a backfl ow.

Function

1) DIN EN 558-1 row 49

(old DIN 3203-3)

Disco Check Valves

Design Body Disc Spring Seal Pressure Range

1 Stainless steel CF8M

Stainless steel CF8M Stainless steelAlSl 316 Ti

NBR, EPDM,

FPM (Viton)PTFor

metal seated

0 to 40 bar

3 Brass 2.0401 0 to 16 bar

4

Alu bronze C954

Alu bronze C954 Hastelloy C4 (2.4610)

0 to 25 bar

4.1

Stainless steel CF8M Stainless steelAlSl 316 Ti

5 Cast steel 1.0619 0 to 16 bar

6 Duplex 1.4469 Hastelloy C4(2.4610) 0 to 40 bar

Type: 932


®

Ver. 1508

Dimensions

Dimensions in mm.

Disco Check Valves

DN Dimensions

[mm] [inch] Ø d Ø D Ø F L

15 1/2 15 43 56 16

20 3/4 19 53 69 19

25 1 25 63 76 22

32 1 1/4 32 75 87 28

40 1 1/2 38 80 101 31.5

50 2 47 95 114 40

65 2 1/2 63 115 136 46

80 3 77 131 154 50

100 4 97.5 150 178 60

Type: 932


®

Ver. 1508

Disco Check ValvesType: 932

DN Dimensions

[mm] [inch] Ø C (PN 10/16)

Ø D(PN 10/16)

Ø C(150 lbs)

Ø C(PN 25)

Ø D(PN 25)

R(PN 10/16)

R(PN 25) L

125 5 194 194 194 194 194 - - 90

150 6 220 220 220 220 220 - - 106

200 8 275 280 280 286 294 11 30 140

250 10 331 340 340 344 356 11 33 145

300 12 380 386 404 404 421 11 33 160

Dimensions in mm.

Dimensions


®

Ver. 1508

min. opening pressure

Tightness The disco check valve closes by himself due to the spring without a difference of pressure.

Seal from [°C] to [°C]

NBR -10 +90

EPDM -10 +120

FPM (Viton) -10 +150

PTFE -10 +200

metal seated -10 +300

Max. working temperature in relation to seals:

Disco Check Valves

DN Kv-valueOpening pressure at fl ow direction without

spring

[mm] [inch] [m³/h] [mbar]

15 1/2 4

~ 20

~ 24 ~ 16 ~ 4

20 3/4 7~ 25

~ 15 ~ 5

25 1 10

32 1 1/4 17 ~ 26 ~ 14 ~ 6

40 1 1/2 24 ~ 27 ~ 13 ~ 7

50 2 37 ~ 28 ~ 12 ~ 8

65 2 1/2 61 ~ 29 ~ 11 ~ 9

80 3 74 ~ 30 ~ 10 ~ 10

100 4 115 ~ 33 ~ 7 ~ 13

125 5 201

~ 30

~ 46 ~ 14 ~ 16

150 6 286 ~ 47 ~ 13 ~ 17

200 8 553 ~ 51 ~ 9 ~ 21

250 10 643~ 40

~ 64 ~ 16 ~ 24

300 12 867 ~ 68 ~ 12 ~ 38

Type: 932


®

Ver. 1508 1249

Type: 932

Pressure loss diagram

0,1 0,2 0,3 0,4 0,5

Druckverlust (bar)Pressure lost (bar)

Volu

menst

rom

(m

3/h

)Flo

w r

ate

(m

3/h

)

0,1

1

10

100

1000

Measurements of fl uid fl ow according to DIN EN 60534-2-3.

The values in the diagram refer to water at 20°C.If you need information on other fl uids, please contact us.

Disco Check Valves


®

Ver. 1742


Disco check valves type 932 are designed to block media on one side of the pipe within allowable pressure and temperature limits (see data sheet) and to be ins-talled in a pipe system only. They have only to be used with media, to which the material and the seals are resistant. They are not suitable for media with solidcomponents..

General safety advicesThe safety instructions for the pipe system, in which the valves are mounted, have to be observed. The same applies to the disco check valves.

Demands on the userIn pipe systems, where our disco check valves are mounted, the planning/instal-ling person and the operator are responsible for the following issues: • The disco check valves must strictly be used according to the regulation in

p.1. • The pipe system has to be installed correctly and its operation has to be che-

cked regularly. • The disco check valves have to be mounted, removed and repaired by qualifi

ed personnel only. The staff must be regularly instructed according to all re-levant regulations concerning working safety and environmental protection, especially in the fi eld of pipes under pressure.

• These staff members have to be informed about the manual and the instruc-tions there included.

Special risksBefore the disco check valve is being removed, pressure has to be completely taken off the plant to avoid media escaping from the pipe. Fluid being left in the pipe must be drained off. Fluid, which has remained in the valve and comes out during removal, has to be collected. If hazardous fl uids or gases are left in the valves, the safety measurements required must be taken.

• Disco check valves have to be transported in their original packaging and to be stored in a clean location.

• Disco check valves include sealing elements consisting of organic material, that reacts to environmental effects. Therefore, they have to be stored in a place, which has also to be kept as cool, dry and dark as possible.

• The front and back sides of the disco check valves must not be mechanically damaged.

CAUTION!

1. Appropriate use in accordance

2. Safety advices

3. Storage

Type: 932 Disco Check Valves


®

Ver. 1508

The following aspects have to be observed during the installation of disco check valves: • Possible damages to the disco check valves and O-rings have to be checked

prior to installation. Check if the valve can be moved. Damaged parts must not be installed.

• Make sure that only those disco check valves are installed, that meet the operational requirements regarding pressure category, chemical resistance, connection and dimensions.

• Make sure to install a minimum of 5 x nominal diameter of straight pipeline in front of and behind the disco check valve.

• Do not install the valves directly onto a pump fl ange. • Avoid pulsation and pressure impact. • Observe the throughput direction (see arrow on the plate)!

After the installation, check the tightness of the connections by a pressure check.


5. Assistance in case of malfunctions, repairIt is absolutely necessary to read and follow the safety instructions before remo-ving the valves (p. 2)!Spare part orders have to be placed at our company and must include the complete data, listed on the plate. Only original spare parts have to be installed. For the removal of the disc, take off the spring by unscrewing the screws at the bottom. Then, the O-ring or the valve can be replaced. To install the valve, follow the instructions in reversed order.



®

Ver. 1806

Type code

Order examlpe


TypDN Material

Size Body Plate Spring Seal

932 15 to 300 VA = stainless steel 1.4408

VA = stainless steel1.4408 1.4436 N = NBR

MS = brass AB = Alu bronze

E = EPDM

AB = Alu bronze

DU = Duplex V = FPM (Viton)

ST = cast steelT = PTFE (Tefl on)

DU = Duplex M = metal seated

932 / 100 / 1 / M / F1932 Disco check valve Typ 932100 Nominal diamneter 1001 Body 1.4408 Disc 1.4436 Spring 1.4436M Seal metal seated

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Germany + SwitzerlandMARTIN LOHSE GmbHPostfach 156589505 HeidenheimPhone: +49 (0) 73 21 / 7 55-0Fax: +49 (0) 73 21 / 7 [email protected] Australia, New Zealand, Indonesia, Singapore, MalaysiaP.T. VOITH PAPER Jl. Permata V Lot EE - 1Kawasan Industri KIICKarawang 41361, INDONESIA Phone : +62 267 419 719 Fax : +62 267 419 717

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People’s Rep. Of ChinaShanghai Fier Mechanical Co. LTDRoom B4, 15/F HuaFu Bldg.No. 585 LongHua xi Rd.ShangHai, China 200232Phone: +86-21-54591038Fax: +86-21-54240616MP: 13611665381shfi [email protected] er.com.cn

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Netherlands Hanwel B. V.Jan Tinbergenstraat 2097559 SP HengeloThe NetherlandsPhone: +31 74-2650000Fax: +31 [email protected]

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PhilippinesR. Dan and Co., Inc. 20 Alfonso St. Rosario Pasig City 1609 Phone: +632 – 6558796 Fax: +632 – 6562089 [email protected] www.robertdan.com.ph

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SwedenPA-Ventiler ABSagbäcksvägen 3B43736 LindomePhone: +46 (0) 31 / 99 25 00Fax: +46 (0) 31 / 99 25 [email protected]

TaiwanE-Chen Engineering Co., Ltd.3F-3, No. 151, Sec. 4,Hsin-Yi Road,Taipei, Taiwan, R.O.C.Phone: +886 (0) 22 / 7056185Fax: +886 (0) 22 / 7 04 59 [email protected]

ThailandWeston Myer Ltd.8 Soi Seri-Thai 58Seri-Thai Road10510 Minburi BangkokPhone: +66 (0) 2 / 3 74 58 69Fax: +66 (0) 2 / 3 75 – 11 [email protected]

Turkey

Phone: +90 216 345 40 48 Fax: +90 216 330 73 12 [email protected]

USA, Canada, MexicoVoith Paper Inc.2200 N. Roemer Rd.Appleton, WI 54912-2237Phone: +1 (0) 920 – 731 – 0769Fax: +1 (0) 920 – 731- [email protected]

Sanrep Kagit San. ve Tic. Ltd. Sti.Altiyol, Kusdili Caddesi No:19/7H.Fazlioglu Is Merkezi34714 Kadiköy – ISTANBUL

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Ver. 1809

Check Valves - LOHSE Armaturenbau und · PDF file280 subject to change ® Swing Check Valves Type ZRK / ZRKF 281 Dual Plate Check Valves Type 915 293 Disco Check Valves Type 930 303

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