product feature：

VSSJA-2(B2F) type double flange limit expansion joint can expand and adjust the connection between the valve and the pipeline within a certain range, and can freely adjust the physical expansion caused by the change of environmental temperature, compensation for the subsidence of the foundation, convenient for the butt of the pipeline, is an indispensable automatic compensation equipment in the pipeline system of building materials, metallurgy, mining, petrochemical, electric power and other industries.

VSSJA-2(B2F) type double flange limit expansion joint adopts selected steel plate welding structure, temperature resistance, wear resistance, long service life, withstand large temperature changes, especially the external seal can adjust the specific pressure and change the sealing ring according to the working condition. It can freely rotate at a certain Angle within 360° range, and the seal can automatically compensate, thus effectively eliminating the leakage. The freedom of choice comes from the accumulation of knowledge, Key points of product knowledge in the field of aviation: The effective limit mechanism can avoid the expansion of the telescopic device to make the pipeline more smooth. Its expansion capacity 120mm ~ 200mm; Applicable temperature between -35℃ ~ 120℃, suitable for medium oil, water, dust gas, etc.

Product introduction：

The double flange limit expansion joint has a certain multi-directional displacement effect in the operation of the pipeline, which plays an important expansion compensation role in the operation of the pipeline due to thermal expansion and cold contraction, crustal subsidence and force. Inspiring progress through our passion for excellence, Key points of product knowledge in the aviation field that Netra friends need to understand： Therefore, the double flange limit expansion joint can alleviate the blind plate thrust in the operation of the pipeline, and play a certain protection for the pipeline, especially the installation and maintenance of the pipeline provides convenience. Product name: VSSJA-2 Double flange limit expansion joint (B2F double flange loose limit compensation joint)
Product alias: double flange expansion joint, double flange limit expansion joint, double flange expansion device, double 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

Double flange limit expansion section in the installation of the first need to pay attention to the following points：

1. The VSSJA-2 B2F limit expansion joint shall be checked before installation, and its model, specification and pipeline configuration are fully in accordance with the design requirements.

2. For the telescopic device with inner sleeve, attention should be paid to making the direction of the inner sleeve Bob consistent with the direction of the medium flow, and the hinge rotation plane of the hinged telescopic device should be consistent with the displacement rotation plane.

3. For the telescopic device that needs to be "cold tightened", the auxiliary components used for pre-deformation should be removed after the installation of the pipeline.

4. It is strictly prohibited to adjust the installation of the pipeline by the method of deformation of the telescopic device, so as not to affect the normal function of the telescopic device, reduce the service life and increase the load of piping, equipment and supporting components.

5, each limit expansion section is affixed with the installation direction indicating arrow and installation instructions, in case of installation error.

Parts material：

Double flange limit expansion joint is composed of body, sealing ring, gland, extension shortening pipe and other main components. On the basis of the original performance of the loose sleeve expansion joint, a limiting device is added, and double nuts are used to lock at the place of huge expansion. The pipeline can be freely telescopic in the allowed amount of expansion, once it exceeds the huge expansion of the limit, to ensure the smooth operation of the pipeline, especially suitable for vibration or a certain degree of inclination and bend in the pipeline connection.

Application field：

Carbon steel B2F double flange pipe limit expansion joint is suitable for both sides are connected with the flange, adjust the length of the connection between the two ends of the product and the flange when installing, tighten the gland bolt evenly in turn, and then adjust the limit nut, so that the pipe can be freely expanded within the scope of expansion, lock expansion, to ensure the safe operation of the pipeline. It is widely used in water supply, drainage, sewage treatment plant, electric power, steel, petrochemical, urban construction, water purification plant and other industries.

Product Photograph：

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:

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.

Reasons for choosing innovative pipelines：

Innovative water supply equipment What are the advantages of cooperation? The focus of "talent team" Construction of chemical and municipal pipelines in power plants Carbon steel B2F double flange pipe limit expansion joint service provider -- Innovative water supply equipment believes that a good Innovative water supply equipment enterprise will attach importance to talent cultivation. ZhongYuan's customer service personnel reminds us of the key points of product knowledge in the field of aviation application: Then, the development of Carbon steel B2F double flange pipe limit expansion joint enterprise training is particularly important. First of all, training is the need of Construction of chemical and municipal pipelines in power plants service enterprises to participate in market competition. Under the current situation, the competition of Construction of chemical and municipal pipelines in power plants enterprises is ultimately the competition of Carbon steel B2F double flange pipe limit expansion joint technical talents. Precision and quality are in our DNA, Zhongyuan valve fittings Reminder Netra Friends can refer to these knowledge: In addition to cooperating with Construction of chemical and municipal pipelines in power plants professional and technical colleges to recruit suitable talents, the more effective way is to improve the Carbon steel B2F double flange pipe limit expansion joint professional and technical quality of existing employees through Construction of chemical and municipal pipelines in power plants industry training, so that they can become Carbon steel B2F double flange pipe limit expansion joint technical talents to meet the needs of Construction of chemical and municipal pipelines in power plants enterprises.

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. The world is your marketplace, Zhongyuan valve fittings make it accessible, Zhongyuan valve fittings reminds Netra friends to understand this information: 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!

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.

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. 

Why do you choose Zhongyuan valve fittings to call and cooperate? Key words: "cultural concept" aviation Carbon steel B2F double flange pipe limit expansion joint service provider -- Zhongyuan valve fittings always believes that: corporate culture condenses the hearts of the people, and excellent talents shape high-quality products! Zhongyuan valve fittings, which has adhered to the aviation field and created Carbon steel B2F double flange pipe limit expansion joint products with ingenuity for many years, has always attached great importance to the impact of cultural concepts on enterprises! Corporate culture is the soul and development cornerstone of Zhongyuan valve fittings, and the formation of Zhongyuan valve fittings corporate culture is by no means a result of one day.