Describe the procedure for selecting cyclone oil separators for screw compressors with and without an economizer. What performance should be taken as a basis for selecting a theoretical compressor or a full one with an economizer.
In order to select oil separators according to the theoretical displacement for screw compressors using an economizer, it is necessary to increase the basic displacement in proportion to the increase in cooling capacity.
operating mode minus 30/plus 45
- without economizer
theoretical volume capacity 250 cbm per hour at 50 Hz
when using the circuit without economizer, we select OM according to the nomogram, FP-OS-40 comes out, while the compressor cooling capacity without economizer is a little more than 50 kW
- with an economizer, the compressor cooling capacity will be more than 80 kW, which exceeds the figure of 50 kW by 1.6 times
therefore, for the selection of oil separators, we use a multiplying factor of 1.6 for the theoretical volumetric productivity, i.e. 250 x 1.6 = 400 cubic meters per hour.
according to the nomogram choose FP-OS-80
This approach only works for systems with overheating. When using systems with an economizer, when the compressor capacity changes, the economizer capacity must also be adjusted to operate with a sufficient discharge temperature (oil separation is difficult at low discharge temperatures).
Question: The setting pressure of FP-SV-038 is 3.0 MPa, the maximum working pressure of FP-LR vessels is 2.8 MPa. What excess pressure is allowed in a pressure vessel?
In accordance with TR TS 032/2013:
Settings for the start of opening and the operating range of the safety device.
54. The number of safety valves, their dimensions and throughput are determined in such a way that excess pressure is not created in the equipment that exceeds the maximum allowable working pressure:
a) more than 0.05 MPa - for vessels in which the overpressure is less than 0.3 MPa;
b) by 15 percent - for vessels in which the excess pressure is from 0.3 to 6 MPa inclusive;
c) by 10 percent - for vessels in which the excess pressure is more than 6 MPa.
4.2 The number of valves, their dimensions and capacity must be chosen so that the pressure in the vessel cannot exceed the design pressure by more than 0.05 MPa (0.5 kg/cmg) for vessels with pressure up to 0.3 MPa (3 kgf). /cm-'), by 15% - for vessels with pressure over 0.3 to 6.0 MPa (from 3 to 60 kgf/cm2) and by 10% - for vessels with pressure over 6.0 MPa (60 kgf/cm2) .
Proceeding from this, a PC for a vessel with a maximum working pressure of 2.8 MPa should operate in the range from 2.8 MPa to 3.2 MPa; from 2.8 MPa to 3.2 MPa. For vessels with a maximum working pressure of 4.5 MPa, the valve must operate in the range from 4.5 MPa to 5.2 MPa.
Hello, can you please tell me if there are any restrictions on the quantity
compressors in the unit when selecting a common oil separator type FP-OS?
The customer is worried that these oil separators are used for units with 3
compressors and more.
When selecting a common gravity type oil separator for a multi-compressor station, there are always concerns about the efficiency of the separator at partial load. This is due to the fact that in these devices the physical principle of oil separation is based on a sharp decrease in the flow rate of the freon-oil mixture to the speed of the oil droplets soaring, followed by precipitation.
Therefore, in order to be 100% sure of the efficiency of the oil separator, it is necessary to understand the conditions under which this unit will be operated, for example, what is the average daily load (one, two, three or more compressors are constantly in operation), the temperature mode of operation (for medium temperature conditions, operation at partial loads is less critical than for low-temperature ones), or to produce serial products, the design of which has passed multiple tests and has previously proven its performance.
Based on our many years of practice, cases of critical failures of multi-compressor installations due to the low efficiency of the gravity-type oil separator when operating at partial loads were extremely rare. And in order to avoid fears in principle, we have developed and produced since 2019 combined oil separators-oil collectors of the OSR series, which were specially developed by our engineers for operation as part of multi-compressor stations, including those with partial load, and have shown their highest efficiency over the entire production period. Since 2019, these devices have been installed at almost all of their facilities by leading retailers of the Russian Federation, they are produced and shipped annually up to 10,000 units of various models of the OSR series. There are no complaints about efficiency at partial load at all, because these devices are essentially three-stage separators, since they contain the principles of cyclone, coalescent and, of course, gravity type of oil separation. Therefore, m We recommend you to use this series of combined oil separators for use in multi-compressor installations.
Could you tell me: there is a receiver FP-LR-120 l. It is necessary to install a safety comb in it (2 safety valves FP-SV-038, combined through a three-way valve FP-TV-114-038). During the laying of highways, they made it difficult to access the PC port. Resoldering of the pipeline, alas, is undesirable. Question: Is it possible to insert a safety comb into the upper sight glass of the receiver, sacrificing some of its functionality?
P.S. Turning the receiver on its axis by 90 degrees will cause other lines to "go".
I would be grateful for an answer. Thanks
According to the requirements, the connection port of the pressure relief device of direct action, spring type, in our case - the safety valve type FP-SV - must be located in the cavity of the vessel, where the refrigerant will be in the gaseous phase! Therefore, on our vessels, the safety valve port is located at the top.
The upper viewing eye is a device for controlling the separation of upper-level media, therefore, under certain conditions, the refrigerant may well be in the liquid phase at this level, if the safety valve is triggered at this moment, there may be negative consequences, such as:
- water hammer;
- valve freezing.
This can lead both to the destruction of the valve itself, and to the destruction of other elements of the system.
Conclusion: it is impossible to install a pre-valve instead of a viewing eye!
Hello, in a unit for 5 compressors with a cooling capacity of 544 kW, it was decided to install conventional oil separators FP-OS-25.0-218 - 5 pcs for each compressor and parallelize two oil receivers FP-OR-25.0, but a question arose regarding diameters pipelines. We have a 3/8 ”tube coming out of the oil separators and entering the oil manifold, we are thinking of making it 3/4” and entering the receiver from the manifold 1/2”, but there are fears of making such diameters of the manifold and oil receiver inlets.
Electronic oil level regulator FP-ERL-4 (set) – 5 pcs.
Oil filter FP-OF-038 – 5 pcs.
Design parameters of the installation:
Boiling point - -10;
Condensation temperature - +45;
Overheating - +10;
Coolant - R507A.
We offer the following oil line configuration:
1. oil line "oil separator-oil collector":
oil separator tube 10mm - check valve 10mm - tube 12mm (as manifold) - rotalock FP-RV-012 12mm oil sump.
- the configuration of the tubes at the inlet to the two oil collectors is Y-shaped.
2. oil line "oil collector-compressor":
oil sump - rotalock FP-RV-012 16 mm - tube 16 mm - manifold (inlet 16 mm - 5 outlets 10 mm, body diameter 28 mm) - tube 10 mm - oil filter FP-OF-038 - tube 6 mm - level controller FP-ERL-4.
- the configuration of the tubes at the outlet of the two oil collectors is F-shaped;
- arrange the manifold in such a way that the distances from the manifold outlets to the oil level regulators are the same for all 5 compressors and are as short as possible.
PS do not forget to install differential check valves on the oil collectors, the difference is preferably from 3 bar, for example FP-DV-038-35
at the inlet to each oil level regulator you can install a shut-off element, for example FP-RV-014SAE
I purchased your products, namely reusable cylinders for collecting freon.
Please add to the description the connection diagram for the cylinder and the explanation on which tap there is a tube to the bottom.
On the valve handle caps there is the inscription liquid - liquid and vapor - steam. There are also marks above the V-vapor-steam and L-liquid-fluid service fittings.
Hello! Question about the oil separator FP-OS-45-258. I can not understand he has a port for connecting a safety valve (PC) or not (and if there is then what size is connecting)?
Hello, oil separators FP-OS-45-258 do not have a safety valve port.
Hello! I design a central on three Bitzer HSN7461-70 compressors (mode: -33C / 45C, with economizer, freon -R507A). According to the oil separator selection graphs in the Frigopoint catalog, two oil separators are suitable: FP-OS-45-258, or FP-OS-40-218. Which oil separator is better to take for this task?
Hello, for screw compressors, incl. Bitzer HSN7461-70 is recommended to use cyclone oil separators FP-OS-40-218, FP-OS-80-318 and FP-OS-200-418.
We also recommend double-checking that the selection is correct, since The FP-OS-40-218 is equivalent in performance to the FP-OS-25, due to the fact that cyclone oil separators are combined (oil separator and oil sump) and the oil is separated only in half the capacity ie. in volume ~ 20 l.
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Try +7 (4722) 23-12-72. Or leave your details we will contact you
Good day. Tell me, please, the color of the RAL receiver Frigopoint FP-LR-250,0 (blue)
Hello. We apply your receivers. There was a need to saugkumirovat receiver FR-LR12.5 to 5 mm. Hg Art. (0,0068 kgf / cm.kv.). Will he maintain such a vacuum?
Hello, tell me, is it planned to release controllers of similar FP-MC-23EM but with defrost by reverse cycle and control of the condenser fan?
Please tell me the difference: FP-ERL3 + BB oil level regulators from FP-ERL3 + BBL
Different length. FP-BB - 34 mm, with BBL - 44 mm
Hello, is it possible to use oil separators Type B and Type C for an air compressor. Will they work in these conditions?
Hello, the components manufactured by Freepoint are designed for cooling and conditioning systems. Therefore, we can not recommend the use of oil separators for systems with an air compressor.
Good afternoon, tell me please. Your equipment in particular receiver and oil separators can work with R410a? If so, what is their working pressure?
Hello, the FP-LR (MP), FP-AS (MP), FP-OS (MP) and FP-OR (MP) oil separators with a working pressure of 45 bar are designed for use in systems with R410a, refrigerant. Vessels are certified for the vehicle.
Specify the maximum weight (piston compressor) that the horizontal receiver will withstand when installing the compressor on top of the receiver? The answer, it is desirable, on the models of receivers.
Hello Colleague, pay attention to the design of the stand of the horizontal receiver, which is designed in such a way that transfers the load to the lower platform and does not load the hull of the vessel at all.
FP-LRH-12,0;16,0 - 150 кг FP-LRH-25,0 - 250 кг FP-LRH-40,0 - 350 кг FP-LRH-70,0 - 450 кг
Also recall the need for mandatory installation of vibration between the compressor and the vessel.
Hello! I teach refrigeration and air-conditioning in Novosibirsk, and the big problem is the lack of real equipment, for demonstration and recommendations for calculations. The dissected (cut) elements of the refrigeration systems are made from broken equipment and, accordingly, the most represented companies. But on the other hand this is the same advertisement of these companies. As an advertisement in Novosibirsk with my participation there was a technical center from Danfoss, you can see on their website. Your equipment is presented to us on the market poorly and frankly speaking, the broken items to me did not fall in the same way, in which there is even greater interest in demonstrating and learning to work with your components, not only in words, but also live exhibits. I ask for your assistance.
Answer: Yes, we are also open to cooperation and are always happy to help science. Send your contact information (name, phone) and a list of necessary components (the catalog can be downloaded on the site) at firstname.lastname@example.org.
Добрый день! Подскажите, можно ли заказать сосуды (ресиверы, отделители жидкости и масла) Вашего производства со стальными (а не медными) присоединительными патрубками?
Здравствуйте, да конечно. Такие изделия изготавливаются по индивидуальному заказу. Ваш запрос Вы можете отправить на email@example.com
Hello. Our company is engaged in assembling and selling refrigeration units, in which we use FRIGOPOINT equipment. Tell me, is there a database of 3D drawings in the resolution of DWG (autocad) on your products: vessels, linear elements, etc.? If there is, then what should be done to access this database?
Answer: Unfortunately, the database exists only in .stp format. You can download it at http://frigopoint.com/blog/2017/05/fp-predlagaet-3d-modeli-komponentov-holodilnoj-tehniki-frigopoint-v-otkrytom-dostupe
Provide information on the volume of the pre-filling with oil for the oil separators: FP-OS-2,0-012 FP-OS-2,0-058 FP-OS-3,5-078 FP-OS-3,5-118 FP-OS- 5,0-118 FP-OS-5,0-138 FP-OS-7,0-138 FP-OS-7,0-158 FP-OS-12-218 FP-OS-12-258 FP-OS- 25-218 FP-OS-25-258 FP-OS-45-218 FP-OS-45-258.
Thank you for your interest in the activities of our company. We are pleased to inform you that recommended pre-filling of the oil separators (data are based on groupings by model):
FP-OS-2,0-012; FP-OS-2,0-058; FP-OS-3,5-078; FP-OS-3,5-118 - 0,5 liters.
FP-OS-5,0-118; FP-OS-5,0-138 - 1,0 liters.
FP-OS-7,0-138; FP-OS-7,0-158 - 1,5 liters.
FP-OS-12,0-218; FP-OS-12,0-258 - 1,75 liters.
FP-OS-25,0-218; FP-OS-25,0-258 - 2,5 liters.
FP-OS-45,0-218; FP-OS-45,0-258 - 5,0 liters.
Q: Please pay attention to the fact that the selection of the oil receiver to the Vessel, the report displays volumetric compressor capacity with the dimension kW.
ANSWER: Due to the fact that the software runs the alpha testing stage, there may be some slight roughness when using this programmoy.Vashi comments have been sent to the curator of the product, we apologize for temporary inconvenience.
QUESTION: It is also a possibility of selection of receiver hladageta compensatory interest will be?
A: 98% of the products manufactured by FRIGOPOINT belongs to the category of serial, so please contact through established channels or directly to the query about the possibility of non-standard products.
QUESTION: I understand that at the moment there is an opportunity to pick up the receiver with a full refrigerant charge reception?
Answer: Indeed, this is a possibility to select the option you want is enough.
QUESTION: Is Completed oil separators type A TEN'om thermostat and heating oil?
ANSWER: Currently, we are producing the selection of suppliers of components through testing obraztsov.Nadeemsya granted that we will be able to announce these components by the end of this year.
QUESTION: I would also like to see the collapsible oil separators of cyclone type your production for piston refrigeration Centrals.
ANSWER: Because Your device is not a mass market, so in the near future we do not plan the formulation of a series of similar produktov.Esche just want to draw your attention to the fact that for us as manufacturers interested in products that are always in strong demand, wearing massive.
Good afternoon. I want to draw your attention that in VesSel Online, the selection of the receivers is impossible to put a negative value in the evaporating temperature cell
Hello. In the near times during our programmers will fix this mistake, thank you for your participation in the beta testing.
Good afternoon. I work as a design engineer in the company for the production of refrigeration units and we constantly use your komplektuyuschie.Problema faced by the person I - No 3d model of your equipment for further use in the design development. Is it possible to get the models in .stp format or at least more detailed drawings of the equipment than you have in the directory? Thanks in advance.
Please send a request to the Official letterhead of your company at the address firstname.lastname@example.org, indicating the models that you need and we prepare and them to you.
Hello! Can refrigerant receivers operate on R 410A refrigerant?
Vessels, manufactured under the trademark FP certified in accordance with the requirements of TR CU 032/2013 and are designed to work with refrigerants - working media group 2 in accordance with the classification of TR CU 032/2013. And as Freon R-410A refer to this group, and all the vessels and apparatus TM FP can be used with R-410A refrigerant within the parameters of allowable operating pressures. The design pressure for the standard range of vessels and apparatuses TM FP is 2.8 MPa.
Please note that the estimated value of the pressure can not be less than the maximum allowable pressure. If you design refrigeration unit with single-stage compression cycle, single-stage throttling and air-cooled condenser, when used as a refrigerant R-410A is necessary to take the calculated value of the maximum pressure a refrigerant receiver is not less than 3.8 MPa (38 bar).
For such pressures, our factory produces special series of vessels and safety valves, initially designed for the operating pressure of 4.5 MPa (45 bar) and this is a worldwide practice, the use of receptacles with a working pressure of 4.5 MPa for refrigerants R-410A and of CO2 (subcritical. ) .Such vascular model (and more information) you can ask our distributors or directly to the factory.
Good day. The question on the selection of the separator:
1. On the diagram contains the volumetric efficiency of the compressor ie volumetric flow compressor or a theoretical volumetric flow rate in the discharge circuit? 2.Maslootdeliteli B and C or a conventional cyclone type?
Thanks for the answer.
1. The chart contains the bulk supply of compressor technical data of the manufacturer.
2. Yes. Oil separators B and C - a conventional type.