Product introduction：

The VSSJA-1(BF) single flange limit expansion joint is a combination of a loose sleeve expansion joint and a limit stub. The single flange limit expansion joint is used to connect with the flange on one side and weld with the pipe on the other side. During installation, the installation length between the two ends of the product and the pipe or flange is adjusted. The gland bolt is evenly tightened diagonally, and then the limit nut is adjusted.
Product name: VSSJA-1 Single flange limit expansion joint (BF single flange loose limit compensation joint)
Product nicknames: single flange expansion joint, single flange limit expansion joint, single flange expansion device, single flange limit expansion joint
Product specification: DN50-DN4000
Product pressure: 0.6-4.0MPa
Product certification: ISO9001-2008
Applicable scope: weak acid, weak base, weak corrosion, oil, hot water, cold water, etc
Product material: Carbon steel, ductile iron, stainless steel
Product color: blue, can be adjusted according to customer requirements
Operating temperature: -40 degrees to 180 degrees

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Product advantage：

The VSSJA-1(BF) single-flange limit expansion joint can compensate the axial displacement of the pipeline and greatly reduce the axial thrust of the pipeline during operation, thus extending the service life of the pipeline and protecting the operation of the line. The single flange limit expansion joint can prevent the leakage or damage of the compensation joint due to the excessive displacement of the pipeline. It is mainly used for the loose sleeve connection of the pipeline to absorb the axial displacement and relieve the axial pressure thrust within the allowable displacement range. It realizes the convenient connection of one side of the pipe flange connection and the other side for the inconsistency of welding. And installed on the pipeline line can facilitate the disassembly and maintenance of the valve, and can overcome the bad influence of subsidence on the pipeline line. VSSJA-1(BF) single flange limit expansion joint is suitable for conveying sea water, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, refined oil, air, gas, temperature is not higher than 250 degrees of steam and granular powder and other media.

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Product characteristics：

VSSJA-1(BF) single flange limit expansion joint is used to connect with the flange on one side and weld with the pipe on the other side. During installation, adjust the installation length of both ends of the product and the pipe or flange, tighten the gland bolt diagonally evenly, and then adjust the limit nut. In this way, the pipe can be expanded freely within the scope of expansion, lock the expansion and the maximum operation of the pipe.
1. large expansion, long service life.
2. convenient valve disassembly, conducive to the pipeline regular maintenance.
3. This product can effectively protect the pipeline from the adverse effects brought by subsidence.
4. excellent material, stable operation.

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Parts material：

No.	Name	Quantity	Material
1	Body	1	QT400-15，Q235A,ZG230-450，20
2	Gasket	1	NBR
3	Cover	1	QT400-15，Q235A,ZG230-450，20
4	Limited short pipe	1	Q234A，20，16Mn
5	Nut	4n	Q235A，20，1Cr8Ni9Ti
6	Long Stud	n	Q235A，35，1Cr8Ni9Ti
7	bolt	n	Q235A，35，1Cr8Ni9Ti

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Technical parameter：

Nominal iameter DN	External diameter of pipe DW		Length		Compensation	Flange connecting dimension
						0.6Mpa			1.0Mpa
	DW	D0	L	L1		D	D1	n-do	D	D1	n-do
65	76	76	340	105	50	160	130	4-Ф14	185	145	4-Ф18
80	89	89				190	150	4-Ф18	200	160	8-Ф18
100	108	108				210	170		220	180
	114	114
125	133	133				240	200	8-Ф18	250	210
	140	140
150	159	159				265	225		285	240	8-Ф22
	168	168
200	219	219				320	280		340	295
250	273	273				375	335	12-Ф18	395	350	12-Ф22
300	325	325	350	130	65	440	395	12-Ф22	445	400
350	377	377				490	445		505	460	16-Ф22
400	426	426				540	495	16-Ф22	565	515	16-Ф26
450	480	480				595	550		615	565	20-Ф26
500	530	530				654	600	20-Ф22	670	620
600	630	630				755	705	20-Ф26	780	725	20-Ф30
700	720	720				860	810	24-Ф26	895	840	24-Ф30
800	820	820	590	220	130	975	920	24-Ф30	1015	950	24-Ф33
900	920	920				1075	1020		1115	1050	28-Ф33
1000	1020	1020				1175	1120	28-Ф30	1230	1160	28-Ф36
1200	1220	1220				1405	1340	32-Ф33	1455	1380	32-Ф40
1400	1420	1420				1630	1560	36-Ф36	1675	1590	36-Ф42
1500	1520	1528				1730	1660
1600	1620	2628				1830	1760	40-Ф36	1915	1820	40-Ф48
1800	1820	2828				2045	1970	44-Ф40	2115	2020	44-Ф48
2000	2020	2030				2265	2180	48-Ф42	2325	2230	48-Ф48
2200	2220	2230				2475	2390	52-Ф42	2550	2440	52-Ф56
2400	2420	2430				2685	2600	56-Ф42	2760	2650	56-Ф56
2600	2620	2630	600	240	140	2905	2810	60-Ф48	2960	2850	60-Ф56
2800	2820	2830				3115	3020	64-Ф48	3180	3070	64-Ф56
3000	3200	3030				3315	3220	68-Ф48	3405	3290	68-Ф60
3200	3220	3230				3525	3430	72-Ф48
3400	3420	3430				3735	3640	76-Ф48
3600	3620	3360				3970	3960	80-Ф56

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Application field：

The VSSJA-1(BF) single-flange limit expansion joint can compensate the axial displacement of the pipeline and greatly reduce the axial thrust of the pipeline during operation, thus extending the service life of the pipeline and protecting the operation of the line. The single flange limit expansion joint can prevent the leakage or damage of the compensation joint due to the excessive displacement of the pipeline. It is mainly used for the loose sleeve connection of the pipeline to absorb the axial displacement and relieve the axial pressure thrust within the allowable displacement range. It realizes the convenient connection of one side of the pipe flange connection and the other side for the inconsistency of welding. And installed on the pipeline line can facilitate the disassembly and maintenance of the valve, and can overcome the bad influence of subsidence on the pipeline line. VSSJA-1(BF) single flange limit expansion joint is suitable for conveying sea water, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, refined oil, air, gas, temperature is not higher than 250 degrees of steam and granular powder and other media.

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Innovative pipeline product services：

Professional manufacturing, professional service, innovation pipeline for you to create more value!

Continuous improvement of service quality, excellence, "sincere service" is the innovation pipeline has been firmly believed in the goal.  Innovation pipeline in strict accordance with ISO9001-2000 quality system certification requirements, strict quality control, responsibility to people, to ensure the healthy operation of production, sales, service.  Strengthen communication with users, dedication to provide our customers with excellent products, perfect and beautiful service, innovation pipeline hereby make the following commitment:

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Product standards：

Steel telescopic products are designed, manufactured and accepted in strict accordance with Chinese GB and HG standards and American API standards. The hardness of the sealing surface shall meet the requirements stipulated by the state, and the width shall exceed the national standards.

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Instructions for purchasing innovative pipeline products:

1、 Product Material Description: Due to the possibility of scratches or dirt on the surface of materials during transportation or distribution, and the possibility of surface oxidation or insufficient aesthetics during storage, the images and physical objects may also differ. Our manufacturer will definitely make our products more aesthetically pleasing, using high-quality raw materials for production. Our manufacturer promises that our products are of high quality and affordable, and are entirely a customer's choice. If you have other models or specifications of products, you can contact our customer service online or consult us when purchasing

2. Shipping instructions: 

1. Due to the unique nature of the materials, all materials are shipped after payment by the customer, and are specially customized products for the customer. Once sold, there are no returns or exchanges for non material or quality issues! Please understand. 

2. Please provide a clear description of the specific specifications, nominal diameter, working pressure, medium to be conveyed, quantity, and required performance of the required product before shopping. The main reasons for doing so are: 

1) Ensure that the product prices quoted by the manufacturer are correct and accurate; 

2) For customers, it provides protection for their own interests and prevents them from misquoting product prices, causing economic losses for both parties and causing unpleasantness for everyone; 

3) Once the customer has made a decision and both parties sign a contract, the products produced by the manufacturer can meet the actual needs of the customer. 

3. If the customer did not provide a clear description, the seller will not assume any responsibility in the event of a dispute! Please understand!

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Reasons for choosing innovative pipelines：

Innovative water supply equipment Based on the advantages of the Construction of chemical and municipal pipelines in power plants industry, the key words "win-win cooperation" Construction of chemical and municipal pipelines in power plants VSSJA-1 Single Flange Limit Expansion Joint service provider -- Innovative water supply equipment's business philosophy can be summarized into eight words "honesty based, win-win development". Innovative water supply equipment has always implemented this concept well for both its internal employees and its external VSSJA-1 Single Flange Limit Expansion Joint partners, thus gaining long-term good business reputation and cooperative relations in the Construction of chemical and municipal pipelines in power plants field and promoting the stable development of Innovative water supply equipment.

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Pre-sale services：

Product introduction, technical exchange, non-standard product design, troubleshooting.

In sales service：

1. Maintain a trustworthy contract, ensure timely supply, and keep in touch with customers at all times. 

2. For special or complex products, our factory arranges technical personnel to provide training and guidance to users on product use, troubleshooting, adjustment, and maintenance.

after-sale service：

1. The warranty period for innovative pipeline products is 12 months from the factory, and the "three guarantees" service (product quality issues) is implemented. 

2. Our factory regularly organizes technical and inspection personnel to visit our products during use, seeking feedback from users on product quality, usage status, improvement opinions, and other aspects, in order to further improve product quality. 

3.Quickly respond to customer complaints about product quality issues 

4. For after-sales service, users are required to fill out the quality feedback form after the service and provide appraisal opinions, in order to jointly improve the product and service quality of the innovation pipeline.

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Order Information：

1. The customer has special requirements for the product and must provide the following instructions in the order contract:

1) Structure length; 

2) Connection form; 

3) , nominal diameter, full diameter, reduced diameter, pipeline size; 

4) Medium used and temperature and pressure range; 

5) Our factory can customize and design special products according to customer specific requirements for experiments, inspection standards, and other requirements. 

2. Our company can customize and design special products according to customer specific requirements. 

3. If the customer provides the determined product type and model, the customer should correctly explain the meaning and requirements of the model, and sign the contract on the condition of mutual understanding between the supply and demand parties.