The B2F (VSSJA-2) type double flange limit expansion joint is composed of a loose sleeve expansion joint and a flange limit short pipe. B2F (VSSJA-2) Double flange limit expansion joint is an additional limit device on the basis of the original performance of the loose sleeve expansion joint. Use double nuts to set the maximum expansion and contraction.
Main structure size of B2F (VSSJA-2) Double flange limit expansion JOINT unit:mm
| Name | quantity | Material |
| Body、 gland | 1 |
QT450-7、Q235A、ZG230-450、20 |
| Sealing ring | 1 | NBR nitrile rubber |
| Short pipe flange | 1 |
Q235A、20、16Mn |
| Stud | n |
Q235A、35、1Cr18Ni9T |
| screw nut | 5n |
Q235A、20、1Cr18Ni9T |
The main technical parameters of B2F (VSSJA-2) Double flange limit expansion joint
Design standard: GB/T12465-2007;
Flange standard: GB/T17241 equivalent (EN1092);
Working pressure: 0.6MPa/1.0MPa/1. 6MPa
Applicable medium: various water quality or other oil, air, gas and other media.
Applicable temperature: EPDM 0-80℃
The B2F (VSSJA-2) type double flange limit expansion joint is composed of a loose sleeve expansion joint and a flange limit short pipe. It is an additional limit device on the basis of the original performance of the loose sleeve expansion joint. Use double nuts to set the maximum expansion and contraction. The pipeline can expand and contract freely in the allowable amount of expansion and contraction. Once the maximum expansion amount is exceeded, it will be limited to ensure the safe operation of the pipeline. It is mainly used to absorb the axial displacement and bear the axial pressure thrust within the allowable displacement range. The pipeline is loose. The sleeve connection is especially suitable for the connection in the pipeline with vibration or a certain slope and bend. It can prevent leakage and damage of Compensation joints caused by excessive displacement of the pipeline. The B2F (VSSJA-2) type double flange limit expansion joint produced by our company meets the requirements of GB/T12465-2007.
The tightness test, strength test, flexibility test, and eccentricity test of the expander are in accordance with GB/T12465- "2007 Pipeline Loose Sleeve Expansion Joints" shall be implemented. Where the flange joint is connected to the pipeline, the pipeline can be used within the range of 5 (+3/-3) degrees without leakage. The expansion joint is equipped with a limit structure and has a certain displacement, which is convenient for the disassembly and assembly of the pipeline and the equipment. It can withstand the tension caused by the working pressure and water hammer pressure of the pipeline, and can transmit the axial thrust to the entire pipeline, which is effective for connecting equipment. A certain degree of protection. The anti-corrosion treatment inside and outside the expansion joint adopts non-toxic epoxy resin baking varnish. The epoxy resin is firmly combined with the body and is not easy to be removed. The coating thickness is between 0.07-0.14mm. The sealing ring ensures reliable sealing and no water leakage under the vertical deflection and eccentricity of the pipeline
1. If the customer has special requirements for the product, the following instructions must be provided in the order contract:
(a).Structure length; (b) Connection Type; (c) Nominal diameter;
(d) Product use medium and temperature and pressure range;
(e) Test, inspection standards and other requirements.
2. Our factory can assemble various driving devices according to customer requirements.
3. If the customer needs to customize a special valve, the meaning and requirements of the model should be correctly explained, and the contract should be signed under the conditions that the supplier and the buyer understand the same.
4. For futures and order customers, please call us and tell us the required valve model, specification, quantity, delivery time and location in detail. And prepay 50% of the total contract amount for the preparation of production materials.
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