In order to minimise maintenance cost and process losses, we strongly recommend to install some monitoring and protecting systems that we offer optional to your ARBO product:
- Dry running protection
- Pressure gauges
- Priming units/ Non-return valves
- Suction strainers
OVERVIEW
Pump protection
All products are machined of massive PP that covers a very wide range of duties – there is no metal to liquid contact. All reinforcement parts are made of SS-316.
For highly abrasive liquids (high % of solids) parts of High modulus HMPE may be ordered.
For highly corrosive mixtures at higher temperatures virgin PVDF is available
| Materialsof construction | Abbreviation | T min. oC | T max. oC |
| Polypropylene | PP | 0 | 80 |
| High Modulus Polyethylene | HMPE | -50 | 80 |
| Polyvinylidenfluoride | PVDF | -30 | 120 |
| Polytetrafluorethene | PTFE | -30 | 120 |
| Materialsof elastomers | Abbreviation | T min. oC | T max. oC |
| EPDM | E | -40 | 150 |
| Viton | V | -25 | 220 |
| Polytetrafluorethene | T | -190 | 260 |
| Materialsof connections | Abbreviation |
| Male straight pipe thread | R |
| DIN2501 PN10 Flanges | F |
| 3-D Unions +GF+ | U |
SPECIAL VERSIONS
Pump protection
Dry running protector / Pressure Switch
High and low pressure safety cut- out
This compact, easily fitted pressure switch can be wired into control circuits or contactors to provide high or low pressure safety cut-out.
Alternatively, it can be wired to give an audible or visual high or low pressure alarm.
It is ideal for the protection of pumping equipment, which can be damaged by cavitation, dry running or pressure build-up.
The unit, which contains a diaphragm operated pressure switch, is mounted in the discharge pipe close to the pump by means of a tee fitting with a female threaded branch.
Materials:
- Lower housing
- PP max. 80 ºC
- PVC max. 60 ºC
- PTFE max. 120ºC
- Diaphragm EPDM, Viton or Viton/PTFE
Pressurerating:
- Max. line pressure : 5 Bar
- Operating pressure : 0,1-2,0 Bar
It must be wired to an electro-magnetic relay which can either be incorporated in or linked to the switchbox controlling the power supply to the pump motor. It can be used with any single or 3 phase motor. Installation tees for mounting the switch unit in the pipeline can be supplied in all sizes in metal or plastics materials.
Cavitation or Dry Running
If cavitation occurs or the pump runs dry, the discharge pressure will drop; this actuates the pressure switch and, through the electro-magnetic relay, cuts the power supply to the pump. An adjustment screw, accessible beneath a cover on the head of the unit, enables the pressure switch to be set to operate at a given pressure drop. A minimum discharge pressure of 2m head is required. The pressure switch is designed for use with clean, non-crystallizing liquids.
For liquids containing particles in suspension or which are liable to crystallization, the unit can be supplied with an intermediate chamber containing a diaphragm through which line pressure changes are transmitted to the switch. The advantage of the intermediate chamber is that it has larger and less restricted surface areas open to the line fluid, thus significantly reducing the likelihood of blockage.
Diaphragm (switch) gauges
Visual monitoring system with optional safety cut-out
The ARBO diaphragm gauge can be used for neutral or corrosive media. All wetted parts are made of highly corrosion resistant plastics or stainless steel. There is no contact between gauge and liquid.
The gauge is separated from the chemical by a diaphragm. Pressure transmission takes place by means of a buffer solution. The large diaphragm area in combination with the tiny compressibility of the buffer solution provides a very accurate indication. The unit, is mounted in the discharge pipe close to the pump by means of a tee fitting with a male 1/2 “threaded branch. Thanks to the special design, the gauge can be rotated 360o in order to put it in the best reading position.
Technical details:
| Available materials: | |
| Diaphragm housing | PP, PVDF |
| Diaphragm/other gaskets | PTFE covered |
| Max. operatingtemperature: | |
| PP | 0 to +80°C |
| PVDF | -40 to +120°C |
| Max. operating pressure | PN 4 |
| Connections | R ½" inner |
| R 1” or | |
| R 1¼" outer | |
| Ranges | 0-4 Bar |
Flow control or Dry Running
Also available with contact switches (code MKM) for dry running protection of pumps or excess pressure control f.i. for filter systems. If the discharge pressure is increasing or dropping, this actuates the pressure switch and, through the electro-magnetic relay, cuts the power supply to the pump. It must be wired to an electro-magnetic relay which can either be incorporated in or linked to the switchbox controlling the power supply to the pump motor.
The pressure switch is designed for use with clean, non-crystallizing liquids. For liquids containing particles in suspension or which are liable to crystallization, the unit can be supplied with an intermediate chamber containing a diaphragm through which line pressure changes are transmitted to the switch. The advantage of the intermediate chamber is that it has larger and less restricted surface areas open to the line fluid, thus significantly reducing the likelihood of blockage.
Ordering code
| Model |
Pressure range Bar |
Material wetted parts |
Gaskets |
|
|
| MM | 0-4 | PP | E | 1/2 | |
| MMO | PVDF | V | 1 | ||
| MKM | T | 1 1/4 | |||
| MKMO |
Priming Units
Applications
ARBO Priming units create self- priming capabilities for centrifugal pumps.By means of a specific calculation, the necessary volume for every typical priming application may be calculated. We offer a wide range of standard priming units but produce custom build units as well, even as big as 500 litre. Once filled, the pump will be capable of priming the suction line and releasing the air through the discharge line. In order to prime automatically every charge, it is necessary that the pump is switched off before it empties the priming unit. To ensure this and to protect your pump, we can advise on optional devices.
Materials
Standard is the material PPH that covers a very wide range of duties. For highly corrosive mixtures at higher temperatures even a reservoir entirely made of PVDF may be offered. The standard priming unit has EPDM gaskets.
| Pos. | Description | Standard | Alternatives | ||
| 1 | Non-return valve | PPH | PVDF | PVC | PE |
| 2 | Transparent filler opening | PPH | PVDF | PVC | PE |
| 3 | Air release valve with hose adaptor for re- circulation line | PPH | PVDF | ||
| 4 | Diaphragm gauge | PPH | PVDF | ||
| 5 | Drain valve instead of plug | ||||
Recommended flow velocity in suction line : 1 m/s
| Materialsof construction | Abbreviation | T min. oC | T max. oC |
| Polypropylene | PP | 0 | 80 |
| Polyvinylidenfluoride | PVDF | -30 | 120 |
| Polytetrafluorethene | PTFE | -30 | 120 |
| Materialsof elastomers | Abbreviation | T min. oC | T max. oC |
| EPDM | E | -40 | 150 |
| Viton | V | -25 | 220 |
| Polytetrafluorethene | T | -190 | 260 |
| Materialsof connections | Abbreviation |
| DIN2501 PN10 Flanges | F |
| 3-D Unions +GF+ | U |
| Table of dimensions (L=Liter) | ||||||
| Type/ dim. | 15L | 25L | 30L | 40L | 60L | 80L |
| a | 430 | 630 | 800 | 530 | 780 | 1060 |
| b | 300 | 500 | 670 | 400 | 650 | 930 |
| c | 320 | 320 | 320 | 440 | 440 | 440 |
| d | 340 | 340 | 340 | 460 | 460 | 460 |
| g | 490 | 490 | 490 | 610 | 610 | 640 |
Ordering code
| Model | Volume (L) | Type of connection | Connection S1 | Connection S2 | Material wetted parts | Gaskets |
| AZU | 15 | F | Dn25 | Dn25 | PP | E |
| 20 | U | Dn32 | Dn32 | PVDF | V | |
| 25 | Dn40 | Dn40 | PVC* | T | ||
| 30 | Dn50 | Dn50 | PE* | |||
| 40 | Dn65 | Dn65 | ||||
| 60 | Dn80 | Dn80 | ||||
| 80 | Dn125 | Dn125 | ||||
| 225 | Dn150 | Dn150 |
Non-return valves
- fully corrosion resistant PP,
- PVC or PVDF – no metal to liquid contact
- gaskets of EPDM (standard) or Viton
- with PTFE-encapsulated spring for maximum security
- absolutely leak free with clean liquids
- can be mounted horizontally or vertically in suction or discharge pipes of centrifugal pumps.
- Valve can be radially disassembled so piping can remain in position.
- Opening pressure 0.025 Bar
| SumPro DO-BG1-2-3 | d 50 | DN 40 |
| SumPro DO-BG4-5 | d 50 | DN 40 |
| DO-32/40/50-160/200/250-HD | d 75 | DN 65 |
| DO-65-200/250-HD | d 90 | DN 80 |
Suction strainers
Applications
ARBO suction strainers are primarily used to protect pumps against foreign particles.This can prevent serious damage of your pumps and will therefore reduce maintenance cost and process down time.
All ARBO strainers are all designed under consideration of the recommended maximum flow velocity for centrifugal pumps.
The pressure drop over the strainer basket is very low, therefore ARBO strainers are well suitable for processes with higher liquid temperatures and low NPSH situations.
We offer a wide range of standard units but produce custom build units as well. For situations where a limited suction lift is required, this unit may be suitable as well. Please consult our sales department for a specific calculation and quote.
Materials
Standard is the material PPH that covers a very wide range of duties. For highly corrosive mixtures at higher temperatures even a reservoir entirely made of PVDF may be offered. The standard priming unit has EPDM gaskets.
| Materials of construction | Abbreviation | T min. oC | T max. oC |
| Polypropylene | PP | 0 | 80 |
| Polyvinylidenfluoride | PVDF | -30 | 120 |
| Materialsof elastomers | Abbreviation | T min. oC | T max. oC |
| EPDM | E | -40 | 150 |
| Viton | V | -25 | 220 |
| Polytetrafluorethene | T | -190 | 260 |
| Materials of connections | Abbreviation |
| DIN2501 PN10 Flanges | F |
Dimensions
| Type | m3/h | S1 | S2 | *S2 | Alldimensions in mm | priming | |||||||||||||
| Dn | max. | Dn | Dn | min. | max. | a | b | c | d | e | f | g | h | j | k | m | n | o | volume L |
| 40 | 6 | 40 | 40 | 80 | 230 | 225 | 470 | 235 | 235 | 343 | 569 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 9,3 |
| 50 | 10 | 50 | 50 | 90 | 220 | 225 | 470 | 235 | 235 | 343 | 569 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 9,1 |
| 65 | 20 | 65 | 65 | 100 | 215 | 225 | 470 | 235 | 235 | 343 | 569 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 8,9 |
| 80 | 30 | 80 | 80 | 105 | 210 | 225 | 470 | 235 | 235 | 353 | 589 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 8,9 |
| 100 | 40 | 100 | 100 | 115 | 200 | 225 | 470 | 235 | 235 | 353 | 589 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 8,6 |
| 125 | 60 | 125 | 125 | 115 | 200 | 225 | 470 | 235 | 235 | 408 | 668 | 337 | 285 | 3x09 PDC.262 | 60 | 145 | 18 | 4 x | 8,6 |
| 150 | 90 | 150 | 150 | 150 | 200 | 315 | 551 | 258 | 258 | 408 | 668 | 427 | 385 | 6x09 PDC.355 | 60 | 145 | 18 | 6 x | 18,8 |
| 200 | 160 | 200 | 200 | 200 | 600 | 400 | 760 | 380 | 380 | 784 | 1082 | 511 | 460 | 6x09 PDC.437 | 100 | 145 | 49 | 8 x | 70 |
Ordering code
| Product | S1 Inlet | S2 Outlet | Material wetted parts | Gaskets |
| Strainer | Dn40 | Dn40 | PP | E |
| Dn50 | Dn50 | PVDF | V | |
| Dn65 | Dn65 | T | ||
| Dn80 | Dn80 | |||
| Dn100 | Dn100 | |||
| Dn125 | Dn125 | |||
| Dn150 | Dn150 | |||
| Dn200 | Dn200 |
The iron catcher:
- optional available with magnetic inserts
- excellent to protect your
- magnetic drive pump impellers and bearings
- mechanical seal
- easy to dismantle and clean
- absolutely corrosion resistant
