The EGM91AA is a hermetic reciprocating compressor manufactured by ZMC, designed primarily for use with R134a refrigerant. It operates on a voltage range of 220-240V at 50Hz and is typically used for low back pressure (LBP) refrigeration applications like household refrigerators and freezers.​​

Main Specifications

• Refrigerant: R134a​​

• Application: LBP (Low Back Pressure)​

• Power: 1/4 HP​

• Voltage/Frequency: 220-240V, 50Hz​​

• Motor Type: RSIR/CSIR​

• Starting Device: PTC QP2-15Ω​

• Oil Charge: 180 cm³ esters (POE)​

• CE certified​​

Technical Details

• Evaporating Temperature Range: -30°C to -10°C (suitable for refrigeration, not deep freeze)​

• Maximum Motor Temperature: 130°C​

• Locked Rotor Current: 6.78 A​

• Voltage Working Range: 187-264V​

• Compressor Cooling: Static​

• Expansion device: Capillary tube​

Typical Uses

• Household refrigerators

• Small commercial refrigerators

• Appliances using R134a needing 1/4 HP compressor power​

This model is manufactured in Egypt and is widely compatible with fridges operating in regions where 220-240V, 50Hz power is standard

For the EGM91AA (LBP, R134a), the answer leans more to freezing / low‑temperature cooling, but it is used for both refrigerators and freezers depending on the system design.​

What LBP means

• LBP = Low Back Pressure, which corresponds to low evaporating temperatures, typically about −30 °C to −10 °C.​

• Such compressors are commonly used in freezers, deep freezers, and low‑temperature refrigerator compartments.​

So for EGM91AA

• Its data sheet lists application = LBP with evaporating range −30 °C to −10 °C, exactly the range used for freezer or low‑temperature refrigerator circuits.​

• Practically: if you charge and size the capillary for −25/−30 °C, it works as freezing; if you design around −12/−10 °C, it becomes strong cooling / chiller level.

The EGM91AA compressor from ZMC stands out as one of the most notable solutions in the domestic and light commercial refrigeration sector thanks to its use of R134a refrigerant and its high efficiency under varying climatic conditions. It delivers optimal cooling performance for refrigerators operating on 220–240 V, 50 Hz power, making it a practical choice for both local and international markets. Its advanced technical features translate into quick response, reduced energy consumption, and excellent compatibility with household systems, providing reliable performance backed by solid regional manufacturing.​​

Journalistic introduction

In the fast‑moving world of refrigeration technology, real innovation often hides in the small components that only technicians and specialists tend to notice. At the core of every modern refrigerator, a compressor sets the rhythm for the entire system’s life span and efficiency, and the EGM91AA model is a clear illustration of this principle. A compact steel shell, carefully engineered handling of R134a refrigerant, and optimized power consumption come together to keep food safe and temperatures stable even when ambient heat pushes equipment to its limits.​​

This compressor is more than a metal capsule in a sealed circuit; it is a technical product with a manufacturing story that starts in Egypt and extends across regional markets serving home refrigeration. Designed for 220–240 V, 50 Hz grids and carrying CE conformity, it offers installers and repair professionals a unit that combines robustness, availability of spare parts, and predictable behavior in low back‑pressure applications. As local industries expand their capabilities, models like the EGM91AA show how regional manufacturing can compete in quality while remaining accessible to small workshops and major appliance brands alike.​​

Technical specifications table for EGM91AA

Determining the cooling capacity of air conditioning and refrigeration compressors is fundamental for professionals in the HVAC industry. One of the key electrical values specified on compressor labels is the LRA (Locked Rotor Amps), which represents the maximum current drawn at motor start. Transforming this into tons of cooling provides a rapid and reliable way to size, diagnose, and upgrade systems.

What is LRA and Why Convert it to Tons?

• Locked Rotor Amps (LRA): The peak current when a compressor starts. It is vital for sizing electrical protection and understanding performance.

• Cooling Ton: Standard unit for cooling capability (1 ton = 12,000 BTU/hr).

The Simple Conversion Formula

For single-phase compressors, the modern, professional formula is:

$$Ton=LRA/36$$

Example:
If the compressor’s LRA is 54:
Ton = 54 / 36 = 1.5 Ton

Always use the division symbol (/) instead of horizontal lines for cleaner, easier-to-read formulas in technical documentation.

Benefits and Use Cases

• Quick Unit Sizing: Helpful when label information is limited or during site evaluations.

• Matching Electrical Loads: Ensures new or replacement units are compatible with existing infrastructure.

• Field Troubleshooting: Arms technicians with a fast check for expected capacity vs. measured electrical consumption.

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Summary:
This guide explains how to convert LRA into cooling tons using a direct and easy-to-use formula (LRA / 36 = Ton). It streamlines sizing, troubleshooting, and matching of commercial HVAC and refrigeration compressors, ensuring professional and efficient results in the field.

Slug:
convert-lra-to-ton-hvac-modern

Quick Reference Table: LRA / 36 = Ton

By using this updated formula and professional writing style, technicians and engineers benefit from fast and transparent conversions that enhance reliability and accuracy in every HVAC task.

Bristol Compressor H20J283ABC

About this product

Product Identifiers

• BrandBristol
• MPNH29B18UABCA
• eBay Product ID (ePID)839548071

Product Key Features

• Power SourceCorded Electric
• RefrigerantR-22
• Number of Compressors1
• Year Manufactured2020
• Power Phase1 Phase
• Capacity16,100-20,000 BTUh
• Voltage208/230 V
• Compressor TypeReciprocating
• ColorBlack
• ModelH29B18UABCA

BRISTOL – H29B18UABH

265 Volts – 1 phase  |  BTU/H : 18000

MTS 185 MT,S224-20 ,TURK ELEKTRIK ,1/4 HP++ ,LBP , R600a ,Lra 13.9AMP ,194/220VAC 50Hs

MOTOR TYPES VOLTAGE AND FREQUENCY CONVERSION FACTORS ASHRAE CECOMAF

Kcal/h x 1,163 = W
Kcal/h x 3,968 = Btu/h
W x 3,412 = Btu/h
W x 0,864 = Kcal/h
Capacity(at 50Hz) x 1,16 = Capacity (at 60Hz)
cc x 0,061 = Cu. in.

www.mbsm.pro, Beko Compressor, MTS170MT, R600A ,Capacity 170 kcal, 1/4HP , 197W ,LBP, LRA 12.6 A ,1PH ,BEKO FRIDGE & FREEZER

www.mbsm.pro, Beko Compressor, MTS200MT, R600A ,Capacity 200 kcal, 1/3 hp , 232W , BEKO FRIDGE & FREEZER

تم إضافة أقسام وكتب جديدة إلى مكتبتي على درايف

يبلغ الآن عدد الكتب لدي أكثر من 500 كتاب يمكنكم تحميل ما تشاؤون منها

بمجرد الضغط على الرابط سوف ينقلكم مباشرةً إلى الكتاب

https://drive.google.com/folderview…

كما يمكنكم تحميل الكتب عن طريق قناة التلكرام من خلال هذا الرابط
https://t.me/ThurayaElectronics

ملاحظة : ( تحزير إلى أصحاب النفوس الضعيفة ممن يريدون استغلال رابط مكتبتي على درايف لكي يقومون بتقصيره واستبداله بروابط مشبوهة أريد أن أقول لكم أنني أقوم بنقل الكتب وتغيري رابط الوصول إليها بشكل مستمر لذالك لن تنجح بهذا الأمر )

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paramètres techniques
numéro de pièce
605185
fréon
R134a
type
GL90AA
voltage
220-240 V
fréquence
50 Hz
domaine d’utilisation
LBP
poids
9.4 kg
puissance
1/4 HP
puissance absorbée
184 W
cylindrée
8.1 cm³
système de moteur
RSIR
hauteur
185.6 mm
puissance à -30°C
148 W
puissance à -25°C
200 W
puissance à -20°C
261 W
puissance à -15°C
330 W
puissance à -10°C
407 W
puissance à -5°C
– W
puissance à 0°C
– W
puissance à +5°C
– W
puissance à +10°C
– W
température ambiante max.
43 °C

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غلق بمشبك قابل للطي ، مما يسمح لستة أقفال لقفل جهاز واحد.

أو القفل والعلامة هو إجراء أمان يستخدم في إعدادات الصناعة والبحث للتأكد من أن الآلات الخطرة مغلقة بشكل صحيح ولا يمكن تشغيلها مرة أخرى قبل الانتهاء من أعمال الصيانة أو الإصلاح. يتطلب الأمر عزل ” مصادر الطاقة الخطرة وجعلها غير صالحة للعمل” قبل بدء العمل في المعدات المعنية. يتم بعد ذلك قفل مصادر الطاقة المعزولة ووضع علامة على القفل تحدد العامل الذي وضعه. عندها يمسك العامل بمفتاح القفل ، مما يضمن أنه فقط هو أو هي قادر على إزالة القفل وبدء تشغيل الجهاز. هذا يمنع بدء التشغيل العرضي لجهاز ما عندما يكون في حالة خطرة أو عندما يكون العامل على اتصال مباشر به. ^[1]

يستخدم Lockout-tagout في مختلف الصناعات كوسيلة آمنة للعمل على المعدات الخطرة ويفوضه القانون في بعض البلدان.

EMBRACO is a company specialized in cooling solutions and
world leader in the hermetic compressor market. Our mission:
provide innovative solutions for a better quality of life, always
attentive to technological excellence and sustainability.
Technological leadership, operational excellence and sustainability are some of the pillars
which ensure the EMBRACO differential over other companies in the world market. Its
products are now considered the favorite leading home appliance manufacturers by major
automakers and are spotlighted by manufacturers of commercial refrigeration equipment.
With global operations and production capacity exceeding 34 million units a year, the
company offers solutions that are differentiated for their innovation and low energy
consumption. Its 11.500 employees work in factories and offices located in Brazil
(headquarters), China, Italy, Slovakia, Mexico, the United States and Russia.
Energy efficiency is constantly sought in the processes, products and relationships with
the communities where it operates. Our company is the absolute leader in this segment,
being able to offer products that meet the most restrictive international standards
regarding energy consumption.
As a worldwide leader, EMBRACO tries to anticipate market changes, and in doing so, our
company is in a state of permanent transformation. We continuously assess our processes
in order to maintain our leadership within the industry and promote growth, without
forgetting the pillars of our organization.

Compressor ASPERA NEK2168GK | NEK 2168 GK

Evaporating temperature +55 C 

mbsm.pro , Compresseur Aspera , Embraco NEK2168GK , R404A , LBP ,3/4 HP

Compresseur hermetique de Aspera – Embraco NEK2168GK – R404A

3/4 HP

220-240V 50 Hz

Cylindrée =  14.3 CM3

APPLICATIONS = LBP

Moteur type: CSR

A capacitor is a device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator.

Unexpectedly the electrolytic capacitors explodes with huge sound and sometime it smoke.

Get started , how to explode a capacitor ???
All capacitors have a maximum voltage and their destruction depends upon the internal construction. Explosions are understood only by delving into the internal construction of electrolytic capacitors – the primary culprit.

Most small value capacitors are simple sandwiches of conductor and insulator and when the voltage exceeds the dielectric strength of the insulation, they short out and burn, crack, pop, open, or smoke. Explosions are rare for these. Popping open is more likely. Their failure is self evident either visually or by failure to function in the circuit.

Most large value capacitors in order to be as small in physical size as possible, have to get the conductive plates of the capacitor as close together as possible and at the same time not so small that the voltage rating is impractical.

It is for this reason that the family of electrolytic capacitors was developed. The trick they use to get high capacity with small separations and reasonable voltage is that they use the “anodizing” of chemical electrolysis on one surface and a water based electrolyte for the other surface. Take one apart and see.

Notice that when a conductive metal is “anodized” by electrochemical process it turns into a dull film that is rather tough and is an insulator. This means that the actual conductive plate of the capacitor has this film entirely between itself and the other plate.

Then the other plate uses a trick too. There’s a water base solution soaked into a paper separator. Now if there was no water, the paper would be the dielectric of a normal capacitor separating the plates. But not here. Here the water has an alkali added to become a fair conductor. And as a liquid it soaks right into the surface structures of the capacitor. So it’s not the paper thickness at all – and not even the insulating surface on the other plate, but the inner recesses of the anodized surface that determine the dielectric distances.

So the operating voltage that a capacitor can tolerate depends upon how thick this anodized film is. And that is a function of it’s manufacture. Now there is a most useful characteristic that tells us we are nearing the max voltage, called leakage.

Here is a way you can check this out. Put in series, a test electrolytic capacitor (polarize it correctly), a variable power supply, a microammeter, and a 1 meg resistor (to limit and protect the meter). From zero as you increase the voltage there will be no current initially, then as you approach the spec op voltage, there will start a small leakage current. Since you have a limiting resistor here, you can increase the voltage without damage. continuing to increase the voltage discovers an increasing leakage current. It is a matter of practice how much safety you apply between the rating and the actual voltage of the circuit.

You can now see how it is that an electrolytic capacitor fails, it is not a voltage breakdown of the dielectric material, but the increase of leakage current that is troublesome. A rising leakage means heat which will boil the water and make steam – that’s the explosion process.

This is explosion as occasional failure of the few. But there is a more spectacular explosion process – it’s explosion by mistake – namely being installed backward. In such a case, the anodizing chemistry is reversed and rather rapidly, the anodized film starts to reverse, and quickly thins out at a weak spot in the rather large effective film area of the capacitor. Then we have short circuit currents and steam generation rather quickly. This sort of explosion usually fills the space (the casing or the whole room if exposed) with little shreads of aluminum foil and alkali soaked paper.

This insightful solution is most successful to achieve capacitors with large values in small spaces, but has a lot of lesser characteristics as the price to pay.

The worst limit, is storage. Electrolytic capacitors store very poorly, and the voltage rating can reduce substantially as the internal chemistry deteriorates. Some equipment manufacturers recommend that capacitors stored for a few years have their inner anodizing conditions restored by simply putting them to the spec voltage for a day to restore full spec.

At the least, if you replace capacitors with old stock, and it didn’t explode when power was restored, be aware that it may not reach it’s spec capacity value for a few hours. A capacitor in use will always be maintained by the voltage in the circuit you use it in.

When electrolytics are used without the circuit supplying a maintenance voltage to keep the anodized film that all depends upon, such as in speaker cross over applications that have no sustaining DC, then the values of the capacitor will deteriorate at least at storage rates, and if AC currents are substantial, even faster.

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Électropompe centrifuge autoamorçante double aspiration du type jet, appropriée pour l’aspiration jusqu’à 50m de profondeur. Corps de pompe et support en fonte, roue en noryl ou sur demande en laiton. Injecteur type P20 standard de 4\” et 2\”. Température maxi. du liquide pompé : 50°C. Pression maxi. de fonctionnement : 8 bars.
Descriptif produit
Pompe pour aspirations profondes

Plage de fonctionnement: jusqu’à 4,3 m³/h

Plage de température du liquide: de -0°C à 40°C pour autres applications. de 0°C à +35°C pour usage domestique Liquide pompé: propre, ne contenant pas de corps solides ou abrasifs, non visqueux, non agressif, non cristallisé et chimiquement neutre.

Température ambiante maximum: + 40°C

Pression de service maximum: 6 bar (600 kPa) pour DP 82 DP 102 8 bar (800 kPa) pour DP 151 – DP 251

Indice de protection: IP 44 (IP 55 au bornier)

Classe d’isolement: F

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