Filling machine for aggressive liquids

The aggressive liquid dosage and filling unit is made of the high molecular weight polypropylene; its capacity is 800 - 2000 bottles per hour


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Highly Chemical Resistant Fittings and Pumps

The products are intended for use with aggressive and neutral liquids and gases in the following industries: basic chemicals, chemical processing,   pharmaceuticals, cosmetics, maize processing, dairy processing, non-alchocolic beverages, alcoholic beverages, celulosis and paper, textile, energy and chemical treatment of water, waste water purification, watersupply, paints and varnishes,  detergents and washing agentse ...


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Stable fire-fighting systems

Above-ground hydrant, Foam pot, Roof cooling nozzles, Water curtain nozzle, Foam diverters, Spray water nozzles, Stable nozzles for heavy air foam, Electromagnetic diaphragm valves


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Separators

Polyethylene separators Euro - norm EN 858, for underground installation, with integrated sludge separator, with safety float against the spilling of mineral oil calibrated for fluid density 0.85 to 0.95 g/cm3, with coalescent filter that allows the residual oil content to be lower than 5 mg/l which is maximum allowed according to DIN EN 858.


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Three-piece ball valves

Simple construction and operation, a small installation space compared to the other valves, fast opening and closing by rotating the handle in 90°, a circular cross section with a full or narrow passage, a very small hydraulic resistance because there is no turning of flow line of the fluid, baukasten principle of building - easy maintenance and reduced cost of stocking spare parts, various material combinations offer the possibility of wide area of application.


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Chemical centrifugal pumps

The pumps are primarily intended for transmission of bases, acids, salt solutions and all other aggressive liquids the main pump material is resistant to. They can also be used for non-aggressive liquids (organic compounds, water and other)


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Two-piece ball valves

Two-piece ball valves with thread fit for nominal pressure PN 16, 25, 40 and 63, and at the request of the customer we produce PN 100 i 160 as well as Class 150, 300, 600, 800, 900, 1500. Operating temperature is limited by applying teflon (PTFE) as a sealing material up to max. 200°C. The area of application is very broad, so it includes their application and installation in the lines with non-aggressive and aggressive fluids in consultation with the manufacturer.


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Regulators without auxiliary energy

Regulator without auxiliary energy or pressure reducing valve for steam, water and gases, is applied in lines and plants under pressure to reduce the pressure of fluid flow. Pressure reducing valves can be used as individual, standalone components or as part of pressure reducing stations.


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Control valves

Materials: W.Nr.1.0619; W.Nr.1.4581; W.Nr.1.4408. Nominal pressures: DIN PN 16, 25, 40, 63, 100, 160. ANSI Class 150, 300, 600, 900. Nominal sizes: DN 15 - 300. Application: the processing industry for all aggressive and non-aggressive fluids up to 400º C.


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Regulators without auxiliary energy

Regulator without auxiliary energy or pressure reducing valve for steam, water and gases, is applied in lines and plants under pressure to reduce the pressure of fluid flow.

Pressure reducing valves can be used as individual, standalone components or as a part of pressure reducing stations. Pressure reducing valves production program of "KB Armatura" consists of two main groups:

  • The first group includes pressure reducing valves with cast iron casing, which corresponds to nominal pressure PN 16 and and is designated RV-G.
  • The second group of pressure reducing valves, designated RV-Č, refers to the valves which housing is made of cast steel and corresponds to nominal pressure PN 40.

Both groups have two constructions of the impulse part:

  • Synthetic rubber membrane
  • Compensator made of W.Nr.1.4571

The type of impulse body is designated with "G" = rubber, or "K" = compensator.

Maximum reduced pressure is 12bar for PN 16 and for PN 40.

For the reduced pressures up to 3 bar the valves with membrane of synthetic rubber are used. The compensator of W.Nr.1.4571 is used for pressure reducing valves for reduced pressures over 3 bar.

Construction

Pressure reducing valve basically consists of two elements:

  • A regulation part
  • An impulse part.

Regulation part makes housing of pressure reducing valve with cone.

The impulse part is a membrane or a compensator.

These two basic elements of pressure reducing valve, are structurally related with the connecting pipe, which may be of different length. Longer connecting pipe is used for steam and flow fluids whose temperature is higher than 120º C.

Basic elements of pressure reducing valve:

  1. An impulse part (a membrane made of rubber and compensator made of W.Nr.1.4571)
  2. A regulation part (housing, cone)
  3. A connecting pipe
  4. An adjusting screw.

Technical characteristics

Production program of pressure reducing valves with basic technical characteristics is systematically presented in table view.

While following data from the table, it is necessary to take into account the interpretation of marks of pressure reducing valves according to the explanation from the chapter "Application".

TypePNDNMaterialInner bodiesPulse bodiesOpseg reducira pritiska
RV-GG 16 15/15 + 150/150 SL.25 Stainless steel Synthetic rubber diaphragm 0,05 + 3
RV-GK 16 15/15 + 150/150 SL.25   Compensator W.Nr.1.4571 3 + 12
RV-ČG 40 15/15 + 150/150 W.Nr.1.0619   Synthetic rubber diaphragm 0,05 + 3
RV-ČK 40 15/15 + 150/150 W.Nr.1.0619   Compensator W.Nr.1.4571 3 + 12

Important remarks when choosing valves

Achieving the pressure differences for various fluids

Achieving pressure differences for various fluids - diagramWater – There is no difficulty to reduce the high pressure to very low pressure in one cascade

Compressed air – Very significant pressure difference between input and output can be achieved.

Steam – Theoretically, high pressure steam and low pressure steam can be equaly reduced in one cascade.

In the realization of large pressure differences in pressure reducing valve, high speed is achieved, which gives a very poor working conditions and reduce the lifetime of pressure reducing valve.

Pratcically, input and output pressure ratio of P1/P2 = 4:1 should not be overcome. Depending on this ratio it is recommended to use a diffuser. The size of the diffuser depends on the exit pressure. The nominal pressure of diffuser is equal to the nominal pressure of the pressure reducing valve.

The pressure reducing valve selection is carried out according to the actual ordinal Kv values, where Kv min should be at 40% of operation and Kv max at 60% of operation. Entering the diagram with the obtained min and max values of Kv we choose nominal size of pressure reducing valve.

Applicability of pressure reducing valves for different pressures depends on the temperature of the fluid flow.

This relation for pressure reducing valves is shown in following tables.

PN P. nominal t. allowed oC 120 200 250 300
16 25 P working bar 16 15 14 13
PN P. nominal t. allowed oC 200 225 250 275 300 325 350 375
40 60 P working bar 40 38 36 34 32 30 28 26
t. allowed oC 400 410 425 430 435 440 445 450
working bar 25 24 22 21 20 19 18 17
 

Regulators without auxiliary energy RVGG RVCK

Type: RV - GG - PN 16
measures are in mm

DNLØ DØ KØ gbfn
pcs.
Ø d0HØ D1
15 130 95 65 45 14 2 4 14 742 430
20 150 105 75 58 16 2 4 14 747 430
25 160 115 85 68 16 2 4 14 752 430
32 180 140 100 78 18 2 4 18 765 430
40 200 150 110 88 18 3 4 18 772 430
50 230 165 125 102 20 3 4 18 783 430
65 290 185 145 122 20 3 4 18 794 430
80 320 200 160 138 22 3 8 18 801 430
100 350 220 180 158 24 3 8 18 812 430
125 400 250 210 188 26 3 8 18 842 430
150 480 285 240 212 26 3 8 22 852 430

Type: RV - ČG - PN 40
measures are in mm

DNLØ DØ KØ gbfn
pcs.
Ø d0H*Ø D1
15 130 95 65 45 16 2 4 14 742 430
20 150 105 75 58 18 2 4 14 747 430
25 160 115 85 68 18 2 4 14 752 430
32 180 140 100 78 18 2 4 18 765 430
40 200 150 110 88 18 3 4 18 772 430
50 230 165 125 102 20 3 4 18 783 430
65 290 185 145 122 22 3 8 18 794 430
80 320 200 160 138 24 3 8 18 800 430
100 350 235 190 162 24 3 8 22 812 430
125 400 270 220 188 26 3 8 26 842 430
150 480 300 250 218 28 3 8 26 852 430
 

Regulators without auxiliary energy RVGK RVCK

Type: RV - GK - PN 16
measures are in mm

DNLØ DØ KØ gbfn
pcs.
Ø d0H*Ø D*
15 130 95 65 45 14 2 4 14 987 260
20 150 105 75 58 16 2 4 14 992 260
25 160 115 85 68 16 2 4 14 997 260
32 180 140 100 78 18 2 4 18 1010 260
40 200 150 110 88 18 3 4 18 1018 260
50 230 165 125 102 20 3 4 18 1028 260
65 290 185 145 122 20 3 4 18 1039 260
80 320 200 160 138 22 3 8 18 1046 260
100 350 220 180 158 24 3 8 18 1057 260
125 400 250 210 188 26 3 8 18 1077 260
150 480 285 240 212 26 3 8 22 1097 260

Type: RV - ČK - PN 40
measures are in mm

DNLØ DØ KØ gbfn
pcs.
Ø d0H*Ø D1
15 130 95 65 45 16 2 4 14 987 260
20 150 105 75 58 18 2 4 14 992 260
25 160 115 85 68 18 2 4 14 997 260
32 180 140 100 78 18 2 4 18 1010 260
40 200 150 110 88 18 3 4 18 1018 260
50 230 165 125 102 20 3 4 18 1028 260
65 290 185 145 122 22 3 8 18 1039 260
80 320 200 160 138 21 3 8 18 1046 260
100 350 235 190 162 21 3 8 22 1057 260
125 400 270 220 188 26 3 8 26 1077 260
150 480 300 250 218 28 3 8 26 1097 260
 
  1. For a certain ratio of pressure, temperature and flow we choose pressure reducing valve of certain characteristics. Every other pressure reducing valve with a larger or smaller opening then chosen will not work well.

  2. Before the installation of pressure reducing valves it is needed to clean the pipe using steam or compressed air to remove impurities in the pipes during installation (the remains of welding, etc.).

  3. It is not advisable to use pastes when connecting flanges, but sealants used for a particular type of fluid flow (for example, kligerit for steam).
    Set the pressure reducing valve to hang vertically, respecting the direction of the arrow cast on valve housing. Mount the valve as far as possible from the devices that use steam, water or gas.

  4. Take into account that the pressure reducing valve works continuously. In occasional work pressure can be regulated by bypass shut-off valve. For these reasons shut-off valve is necessary in front of the pressure reducing valve.

  5. If the fluid flow is steam or compressed air, it is rational to provide one element that diverges in the direction of fluid flow.

  6. If the fluid flow is liquid, it is recommended to install one air tank, which is a kind of shock absorber, on the output side to avoid any vibration in the pipes.

  7. To further increase the regularity of the reduced pressure, reducing the turbulence at the output of the pressure reducing valve, the valve should not be placed directly in front of the device of the user. It is considered that this distance should be 2-4 m.

  8. Bypass allows the removal and control of the pressure reducing valve without stopping the process. In order to avoid frequent calibration of pressure reducing valve, manual control is performed on bypass with the shut-off valve. Manual control with shut-off valve must be done very slowly with continuously monitoring the pressure gauge.

  9. Dirt separator is placed in line ahead of any regulation parts in order to prevent damage to the sealing elements of these parts from a variety of mechanical impurities. Installing dirt separators in front of pressure reducing valve extends the lifetime and efficiency of the pressure reducing valve

 

To select the pressure reducing valve it is necessary to send to us a filled questionnaire or provide the following information:

  • Type of fluid (water, steam or gasses)
  • Flow O (t/h) (bar/h)(Nm3/h)
  • Input pressure (pressure gauge) P1 (bar)
  • Output pressure (pressure gauge) P2 (bar)
  • Fluid temperature before reduction t1°C
  • Needed fluid temperature after reduction t2°C
  • Temperature of cooling water (condensate) tv°C
  • Pressure of cooling water (condensate) Pv bar
Nominal diameter DN 15 20 25 32 40 50 65 80 100 125 150 200
Nominal pressure PN (bar) 16; 25; 40
Kvs (m3/h) 3.2 5 8 12.5 20 32 50 80 125 160 280 340
Body material W.Nr.1.0619
Outlet pressure range (bar) 1,5 - 4;  2,5 - 6;  4 -10

Regulators of output pressure

Nominal diameter DN 15 20 25 32 40 50 65 80 100 125 150 200
L (mm) 130 150 160 180 200 230 290 310 350 400 480 600
H (mm) 540 540 540 605 605 605 640 640 680 680 720 720
Weight cca. (kg) 14 15 18 21 22 25 37 41 68 72 88 90
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KB Armature
Radnička 5, 11030 Belgrade, Republic of Serbia
Tel: +381 11 3557 541 Fax: +381 11 3550 097
info@kbarmature.rs
designed by Ivan Neđić