Circulating Lubrication Systems (Oil)

Circulating Lubrication Systems (Oil) 15006US

Screwin Restrictors, Metering Valve Distributors, Flow Volume Divider

Screwin restrictor

Metering valve distributor

Flow volume divider SP/SMT

A continuous flow oil is often necessary for the lubrication or cooling of machines or systems requiring large amounts of oil. This flow is produced by gear, gerotor, vane and piston pumps and then distri buted to meet the needs of the individual lube points.

The system is very simple if there is only one lube point to be supplied. But if the lubricant is to be delivered to a number of lube points in equal quantities or certain proportions, there are several possibilities entailing different expenses and effects.

If must be remembered that circulating lubrication systems require an oil return line from the lube points to the oil reservoir.

(cf. 15017US)

Adequate filtering filtering of the oil must be pro vided for. Restrictors, especially for small amounts of oil, are sensitive to dirt.

Layout of a circulating lubrication lubrication system (printing machine) with progressive feeders

Quality Management DIN EN ISO 900 9001:2000 1:2000 Environmental Management DIN DI N EN IS ISO O 14 1400 001 1

Circulating Lubrication Systems (Oil)

Distribution systems

15006US

System description

1a Restrictor tubes

A pump supplies a network of lines connected to all the lube points via manifolds and branch lines. The quantity is apportioned in inverse proportion to the resistance of the restrictor tubes, screwin restrictors or metering valve distributors.

1b Screwin restrictors and adjust. metering valve distributors

Screwin restrictors can be installed on manifolds (cf. leaflet 10103US or screwed directly into the threads of the lube points.

1

1c 1c Flow monitors with choke System similar to 1b, but the interchangeable metering valve is installed upstream of a flow monitor in which an electrical contact is actuated by a piston moved by the oil flow. The contact returns to its neutral position when there is oil pressure without a simultaneous flow of oil. See leaflet 11704US

Progressive feeders The flow from the pump is divided up by a feeder. The flow from this “master feeder” can be further divided up for up to a total of some 100 lube points by way of down stream progressive feeders.

2

See leaflet 101071US

Multicircuit pumps

3

Multicircuit pumps (e.g. 2, 4, 5, 8, 10, 20 zones) supply the lube points direct with prespecified quantities of oil that correspond to the pumps' delivery rates. It is possible to work with or without priming pressure, depending on the operating pressures and accuracy requirements to be expected. Subdistribution of the individual zones is possible in accor dance with systems 1 and 2. See leaflet 11204US

Auxiliary equipment for systems 1a and 1b is specified in this leaflet. Flow volume divider, type SP/SMT for circulating lubrication systems (oil) cf. leaflet 15017US.

2


Volumetric flow per lube point

Permissible operating pressure [bars]

15006US

Max. number of lubrication points

Monitoring

General remarks and criteria

1a

a few ccm to several l/min

2  20

Screwin restrictors: 0.2230 ccm/min

2  20

Unlimited in practice.

Metering valve distributors 0 2000 ccm/min

0  10

Tubing cross sections and pump have to be adapted.

0.0514 l/min

No monitoring of individual points, pressure can only be monitored in the main line.

Inexpensive, reliable, insensitive to dirt. Planning is complicated when extensive, asymmetric systems with different oil needs are involved.

1b 1c Restrictors can clog up when unfiltered oil is used. It is therefore necessary to install a microfilter upstream in the systems, preferably with a dirt indicator. Planning and quantity regulation easy. The pressure losses in the tubing have to be taken into account when the system is designed. Oil flow is monitored. An alarm is triggered if the flow drops below the bottom limit of the range for the flow monitor selected.

5  25

For an even distribution of oil provide for the most symmetric layout possible. Lay tubing with the largest possible cross sections from the pump to the junctions. When individual points require different amounts of oil, change the lengths or cross sections of the restrictor tubes to obtain the respectively needed quantity.

1a 1b 1c Metering imprecise with fluctuating and varying back pressures. Often of no im portance in circulating lubrication systems not used for cooling purposes at the same time. The systems do not depend on the viscosity.

Pulsating oil current. 5  200 a few ccm to 1 l/min

Pressure should not exceed 100 bars in circu lating lubrication systems.

2 to roughly 100

Central monitoring of functions of all distributors easy since systemrelated.

Very exact apportioning of quantities, even with back pressures. Planning complicated, especially changes at a later date. The systems depend on the viscosity.

Easy to plan.

0.0151.2 l/min per outlet

20 or 80 depending on pump

2, 4, 5, 8, 10, 20 zones per pump

Monitoring of one or more strings of lines with flow monitors or the like possible.

A monitored string of lines already shows the pump is operating and “lubricant is available”. The lower the pressure difference between the priming pump and distributing pump the more even the delivery rates are in relation to each other.

3


15006US

Screwin restrictors Screwin restrictors are used to deliver relatively small amounts of oil to the lube points. The sizes are identified by code numbers.

The diagrams show the flow rates of the individual sizes as a function of the pressure and as measured with an operating viscosity of the oil amounting to 140 mm2 /s. The flow rate varies with the viscosity.

Special attention must be paid to the use of clean oil, the recommended filter size being 10 µm. Screwin restrictors of types C and D additionally contain one check valve each that can help to prevent leaks, for instance.

The scope of delivery also covers union nuts and tapered rings when types C or D are ordered.

Depending on the position of the embossed direction arrow, the restrictors can either be combined (cf. leaflet 10103US) and fitted to manifolds (types A and D) or directly screwed into the ports of the individual lube points (types B and C).

Type A

Type B

code number code number

30

Order No. VD1 10 2 VD1 10 3 VD1 10 4 VD1 10 5 VD1 10 6 VD1 10 7 VD1 10 8 VD1 10 9

for tube diam.

Code number

4

2 3 4 5 6 7 8 9

Washer, order No. 504019

Order No. VD2 10 2 VD2 10 3 VD2 10 4 VD2 10 5 VD2 10 9

for tube diam.

Code number

6

2 3 4 5 9

] 250 n i m / 3 c [ e g 150 n e m s s 100 u l f h c r u 50 D

4 3

w o l f

2

 0

 1 

Washer, order No. 504019

2

3

4

5

6

pressure [bars]

Type D

code number

Order No. VD3 09 9 VD3 10 0 VD3 10 1 VD3 10 2

2

3

code number

for tube diam.

Code number

4

00 0 1 2

Tube connection acc. to DIN 2353

Order No. VD4 09 9 VD4 10 0

for tube diam.

Code number

4

00 0

Washer, order No. DIN7603A8x11.5CU

] n i 2 m / m c c [ e t a r 1 w o l f

1 0 00

 0

1 

2

3

pressure [bars]

8

7 6

0

1 

Port tapped for solderless tube connection. SW = width across flats

Type C

9

m200

5

] n i 20 m / m c c [ e t a 10 r

code number

4

5

6

2

3

4

pressure [bars]

5

6

4


15006US

Connecting piece with restrictor

Nomograph for determination of restrictor size

(complete with washer)

Code No.

Code No.

for tube Connection diam. thread 1 )

Order No. GD60 GD61 GD62 GD63 GD64 GD65

4

GD80 GD81 GD82 GD83 GD84 GD85 GD86 GD87 GD88 GD89 1 )

5

6

Code No.

M12x1.5

60 61 62 63 64 65

M14x1.5

80 81 82 83 84 85 86 87 88 89

Ports tapped for solderless tube connection to DIN 2353 (cutting sleeve)

Determining the restrictor size

1. Draw a straight line along the index lines through point Q eff.

] s / 2

min. system pressure

m m [ . f f e ν

y t i s o c s i v g n i t a r e p O

] s r a b [ p

e r u s s e r P

2. Determine the point at which p intersects with this line, resulting in D.

Lubricant quantity Q [ccm/min]

3. Select the restrictor closest to point D.

Code No.

D must be inside the white field, i.e. small amounts cannot be “apportioned and moni tored” with the unit. Example 1

required: given:

ν

Q = 36 ccm/min, eff = 280 mm2 /s, p = 7 bars

Result: restrictor size No. 60 (borderline case)

] s / 2

min. system pressure

m m [ . f f e ν

Example 2

required : given :

ν

Q = 260 ccm/min, eff = 480 mm2 /s, p = 8 bars

Result: restrictor size No. 80

y t i s o c s i v g n i t a r e p O

] s r a b [ p

e r u s s e r P

Lubricant quantity Q [ccm/min]


15006US

Metering valve distributors These metering valve distributors are used If an infinitely variable adjustment of the flow rate per lube point is required – even at a later date.

B

In the case of type A – for flow rates within the dropfeed range – knurled lock nuts and knurled screws are provided for adjustment purposes. It is necessary to provide for a sufficiently large drainoff in order to maintain a free fall of drops in the sight glass. spacer

In the case of types B and C, the continuous flow rate is adju sted after the upper hexagonal lock nut is loosened. Springloa ded metal pins in sight glasses indicate that oil is flowing when they move away from the mark. Characteristic values of the metering valve distributors

operating pressure . . . . . . . . . . . . . . . . 10 bars viscosity range . . . . . . . . . . 10 to 1000 mm2 /s temperature range . . . . . . . . . . . . . 0 to +60 °C mounting position . . . . . . . . . . . . . . . as shown

for 6 mm diam. tube

Order No.

Number of

Dimensions in mm

lube points

l1

l2

l3

242024.00

2

49

–

17

Output range type A . . . . . . . . . . . . . . . . . . 0 to 10 ccm/min type B . . . . . . . . . . . . . . . 10 to 1000 ccm/min type C . . . . . . . . . . . . . . . 10 to 2000 ccm/min

242034.00

3

66

17

34

242044.00

4 5

83 100

34 51

51 68

242064.00

6

117

68

85

Indicating range for types B and C at 110 mm2 /s commencement of indication . . . at 10 ccm/min end of indication . . . . . at 1000 or 2000 ccm/min

242104.00

10

185

136

153

242124.00

12

219

170

187

242054.00

Adapter for main tube: 6 mm diam. tube, order No. 406162 8 mm diam. tube, order No. 408162 10 mm diam. tube, order No. 410162 Screw plug, order No. 408211 Washer, order No. 508215CU

A

C

spacer spacer

for 6 mm diam. tube

Order No.

Number of

Dimensions in mm

lube points

l1

l2

l3

for 10 mm diam. tube

Number of

Dimensions in mm

Order No.

lube points

l1

l2

l3

242016.00

1

32

–

–

242025.00

2

66

–

23

242026.00

2

49

–

17

242035.00

3

89

23

46

242056.00

5

100

51

68

242045.00

4

112

46

69

242146.00

14

253

204

221

242055.00 242065.00

5 6

135 158

69 92

92 115

Adapter for main tube: 6 mm diam. tube, order No. 406162

Adapter for main tube:

8 mm diam. tube, order No. 408162 10 mm diam. tube, order No. 410162

10 mm diam. tube, order 410018 12 mm diam. tube, order 412004

Screw plug, order No. 408211

Screw plug, order No. 412011

Washer, order No. 508215CU

Washer, order No. DIN7603A18x22CU 1 )

Ports tapped for solderless tube connection

6


Notes

15006US

7

Notice! All products from VOGEL may be used only fo r their intended purpose. If operating instructions are supplied together with the products, the provi sions and information therein of specific relevance to the equipment must be observed as well. In particular, we call your attention to the fact that hazardous materials of any kind, especially the materials classified as hazardous by EC Directive 67/548/EEC, Article 2, Par. 2, may only be filled into VOGEL central lubrication systems and components and delivered and/or distributed w ith the same after consultation with and written approval from VOGEL. All products manufactured by VOGEL are not approved for use in con junction with gases, liquefied gases, pressurized gases in solution and fluids with a vapor pressure exceeding normal atmospheric pressure (1013 mbars) by more than 0.5 bar at their maximum permissible temperature.

Willy Vogel AG Motzener Strasse 35/37 12277 Berlin, Germany P.O.Box 9704 44 ·12704 Berlin

Willy Vogel AG 2. Industriestrasse 4 68766 Hockenheim Germany

Tel. +49 (0) 307 20 020 Fax +49 (0) 307 2002111 info@vogelberlin.de www.vogelag.com

Tel. +49 (0) 62 05 270 Fax +49 (0) 62 05 27132 info@vogelberlin.de www.vogelag.com

Vogel France SAS Rue Robert Amy, B.P. 70130 49404 Saumur cedex France Tel. +33 (0) 241 404 200 Fax +33 (0) 241 404 242 [email protected] www.vogelfrance.com

3 0 0 2 / 3 0 0 0 0 0 ! e c i t o n t u o h t i w e g n a h c o t t c e j b u S

Circulating Lubrication Systems (Oil)

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