China high quality Ammonia Compressor Rotary CZPT Ammonia Refrigeration CZPT screw conveyor end shaft

Product Description

Screw Compressor Unit (Dual-stage)

 

Screw Compressor Features

High Reliability

· Sliding bearing, long operating life

· Less wearing parts, smooth operation, suitable for long-term operation

 

High efficiency

· Low exhaust temperature, high volumetric efficiency

· World’s leading screw compressor rotor profile, high efficiency

· Energy stepless adjustment

 

Intellectualized

· Manual control and microcomputer automatic control

 ·The special microcomputer controller developed by UK Guardian company have features of fast running speed, strong control capability. And realize modulation and networking

 
Bingshan 
JZLG Series Screw Compressor Unit Technology Parameter Table

Unit Model JZLG

12.5

12.5F

16

16F

20

20F

25

25F

31.5

31.5F

Refrigerant

R717

R22

R717

R22

R717

R22

R717

R22

R717

R22

Unit

Refrigeration

Capacity

Air Conditioning Condition

KW

307.1

278.

650.5

591.2

1385.2

1258.9

2760.4

2508.4

5431.6

4935.8

Standard Condition

148.1

147.9

315.7

314.3

672.3

669.3

1339.9

1333.7

2636.5

2624.4

Low Temperature Condition

53.4

56.9

113.5

121.0

242.3

258.2

483.3

515.2

951.3

1014.0

Low Temperature Condition With Economizer

63.8

75.3

135.7

159.7

289.4

340.2

577.3

677.0

1136.5

1339.4

Shaft Power

Air Conditioning Condition

KW

55.3

52.7

116.5

111.0

245.2

233.5

487.7

464.4

959.1

913.2

Standard Condition

39.5

41.1

83.2

86.6

175.1

182.2

348.3

362.3

584.9

712.5

Low Temp. Condition

34.8

36.9

73.1

77.6

153.5

163.1

305.6

324.6

601.0

638.4

Low Temperature Condition With Economizer

35.5

39.5

74.6

83.0

156.5

174.1

308.8

343.3

606.1

675.2

Suction Pipe Diameter

mm

100

100

150

200

300

Exhaust Pipe Diameter

mm

65

80

100

150

200

Outline (LxWxH)

mm

2770x1200x1850

2965x1355x1920

3610x1520x2280

4855x1975x3070

5930x2300x3350

Weight

(About)

Air Conditioning Condition

Kg

2240

2860

5850

11000

17200

Standard Condition

2920

5690

10900

16600

Low Temperature Condition

5620

Compressor

Theory Gas Transmission Rate

M3/h

276

580

1215

2395

4700

Energy Adjustment Scope

%

10~100 Stepless Adjustment

Note: 

· Condition: Evap. Temp.:-40ºC~ +5ºC, Cond. Temp. ≤+43ºC,Exhaust temp.≤+105ºC.

  Oil injection temp.: +25ºC~ +65ºC, Oil pressure higher than discharge pressure: -0.15~0.3MPa.

· Air Conditioning condition: +5ºC/+40ºC, Standard conditions: -15ºC/+30ºC, Low temperature condition: -35ºC/+35ºC
 

Bingshan Group was founded in 1930(Investment by CZPT & Chinese Goverment), there are 43 enterprises, which include 1 public company, 9 subsidiary enterprises (domestically funded enterprises), and 32 Sino-foreign joint ventures. CZPT Group has total assets of 9.5 billion RMB and 12000 contracted employees.  It’s China’s largest manufacturing base of refrigeration and air-conditioning equipment, agricultural deep processing equipment base, and 1 of the main bases of China’s petrochemical general machinery equipment.

 

HangZhou CZPT Engineering & Trading Co., Ltd. (Hereafter referred to as BSET) is jointly funded professional trading company by HangZhou CZPT Group Co., Ltd and HangZhou Refrigeration Co., Ltd. in 1988. Concentrating on consulting, design, sales. 

BSET provides quality products to different application fifields including fruit and vegetable, meat and poultry, seafood, beverage etc processing and freezing & refrigerating fifield etc. 

BSET has undertaken hundreds of turnkey projects in Asia, Africa, America etc. more than 60 countries and regions, as well as offer customized energy optimization and sustainable cold chain solutions. 

 

Main Application

Heating Ventilation Central Air Conditioning

Industrial Refrigeration

Food Refrigeration

Trading & Service

OEM & PART

 

Main Products

Screw Compressor Unit Series

Piston Compressor Unit Series

LiBr Absorption Chiller Series

Condenser and Cooling Tower Series

Evaporator Series

Quick Freezer Series

Commercial VRF Series, Air Handling Unit Series, Terminal Equipment Series
 

 

 

FAQ:

Q1.What is our main product ?

A1: Our company is a professional trading company funded by HangZhou Refrigeration Co., Ltd. in 1988. Concentrate on consulting, design, sales, installation, commissioning and maintenance of the refrigeration equipments.

 

Q2.When can I get the price ?

A2:We usually offer the quotation within 2-3 work days for equipment and 5-10 work days for system after receiving your inquiry. For urgent offer, please contact with us for special.  

 

Q3.What is the Trade Term?

A3: We accept Ex-work factory , FOB HangZhou, CNF or CIF, as your requirement. 

 

Q4.How long is our Production leading time?

A4: It depends on type of equipment.

For cold storage equipment, the lead time is 60-80days after receiving down payment or Letter of credit.

For Spiral Freezer, Tunnel Freezer, the lead time is 80-90days after receiving down payment or Letter of credit.

For flake ice making unit and plate freezer, the lead time is 45days after receiving down payment or letter of credit.

 

Q5.What is the Payment term?

A5: By 100% T/T before shipment or By L/C at sight.

 

Q6. During shipping, if there is a damage to products, how do you get replacement?

A6: Firstly, we should investigate the reason cause the damage. At the same time, we will claim for the insurance by ourselves or assist the buyer.

Secondly we will send the replacement to the buyer. The responsible person for above damage will take charge of the cost of the replacement.

 

Q7. What are your terms of packing?

A7: Packing: export worthy package suitable for container transportation.

 

Q8. Do you test all your goods before delivery?

A8: Yes, we have 100% test before delivery.

 

Q9: How do you make our business long-term and good relationship?

A9: HangZhou Refrigeration Co., Ltd was established on 1930. In past 88 years, we have set up our famous brand “Bingshan” not only in domestic market but also overseas market. How to make this brand life so long time?  Good quality and reliable service create good reputation among the customers. Many customers keep adopting our system in past 20days extension of the business. Win-win business is our main task for the long-term cooperation.

 

Q10: Are you a factory or a trading company?

A10: We are the only door to overseas market for HangZhou Refrigeration Co., Ltd. We have our own design team, installation team and after-sales team. We are professional engineering & trading company. We have set up branch office in Philippines, Malaysia, Thailand, Burma, Cambodia, Singapore, Bangladesh, Pakistan, Russian, Uzbekistan, Brazil, Argentina etc.

 

Q11: Where is your factory located?

A11: Our factory is located in HangZhou, ZheJiang  province.  

 

Q12: What is your warranty?

A12: Warranty: 12months after commercial running or 18months from the date of shipment, subject to the earlier expiry.

 

Q13: Can you arrange 30 party pre-shipment inspection

A13: Pre-shipment inspection: Supplier’s pre-shipment inspection is Final; pre-shipment inspection by third Party on buyers cost.

 

Q14:Can we do our OEM logo?
A14:Yes, for the products with drawing supplied by you, we of course apply your logo

 

Lubrication Style: Lubricated
Cooling System: Water Cooling
Power Source: AC Power
Customization:
Available

|

Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

screwshaft

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are two main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on one side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between two and sixteen inches. A screw with a pointy tip has a smaller major diameter than one without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is one element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.

The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of one thread to the corresponding point on the next thread. Measurement is made from one thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in one revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.
screwshaft

The lead of a screw shaft

Pitch and lead are two measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are two ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with two or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are two types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.
screwshaft

The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.

China high quality Ammonia Compressor Rotary CZPT Ammonia Refrigeration CZPT   screw conveyor end shaftChina high quality Ammonia Compressor Rotary CZPT Ammonia Refrigeration CZPT   screw conveyor end shaft
editor by CX 2023-11-13