• YDQ Series Lightweight Hydraulic Front-jamming Jacks

YDQ Series Lightweight Hydraulic Front-jamming Jacks

Light weight;small volume;convenient to use;quite applicable for environments with high altitude and smaller spaces.

Product Details

Quick Details Parameter

Minimum Order Quantity : 1 Set/Sets
Supply Ability : 5 Set/Sets per Month
Model Number : YDQ
Type : Hydraulic Jack
Certification : Quality Certificate
Min Height : 120mm
Max Height : 200mm
Capacity (Load) : 21-30T
size : small



Working Principle:

 Under the function of oil presurre,the moving part moves relative to the fixed part to realize tensioning the jack.The design tensioning force can be obtained by controlling the area of the tensioning cavity and the oil pressure.In order to reduce the weight of the jack,the stroke of the jack is designed as 120mm,160mm and 200mm.the front-jaming jack has the performance of  continuously progressive repeated tensioning,and it can realize the tensioning of prestressing tendons of different lengths.The structure diagram of the YDQ front-jaming jack is shown in the figure below: 


Specifications and models meanings:


YDQ——Hydraulic Front-jamming Jack

100——Nominal Tensioning Force(kN)

120——Stroke of Tensioning(mm)



1.light weight

2.small volume

3.convenient use

4.used for steel strand



Technical Performance Parameters:

YDQ front-jaming jacks have multiple specification,including 100kN,260kN,500kN,750kN etc.,the standard strokes of tensioning are 160mm and 200mm.it can also be customized according to the customer demand. Technical Performance Parameters are shown in Table 1:


Table 1


How to use:

 How to use:

 figure 4



Company Profile

Liuzhou HM Prestressing Machinery Co., Ltd. is an enterprise engaged in the following main businesses: R&D of prestressing technique, manufacture of prestressed anchorages and matching devices, bridge cable systems and grouting equipment, installation and construction concerning prestressing, and product supply and construction for bridge maintenance and reinforcement.

Our company is located at No. 5, Hengye Road, Liuzhou Xinxing Industrial Park, only 0.5km from the junction of Guilin-Beihai Expressway and Liuzhou Airport, thus we enjoy quite convenient transportation. Our company covers an area of more than 20 acres with 6,000sqm production plants and a 2,500 office area. At present, we have more than 120 sets of various advanced equipment and more than 130 employees, including 30 technicians. We completed the output of more than RMB40 million for project construction and product sales from January to November in 2011.

Our company was set up by a number of senior technical, R&D and marketing personnel, striving for innovation. We have accumulated many years' experience in the prestressing design, production, marketing and construction.

We use advanced equipment to guarantee good quality and improve the working efficiency. We take performance and quality as premises, and take test data and relevant standards and regulations as production base, so as to strive for better quality and service to keep regular customers, exert the advantages of special prestressed products and matching construction technique, and build the image of a featured enterprise expert in prestressing.

The prestressed series products launched by our company are subject to strict quality control from design and argumentation to volume production and launching; for the anchoring performance at static load, the important technical indexes including the efficiency coefficient of anchorage, total strain, efficiency coefficient of grip, etc., are all superior to the provisions in the national standard GB/T14370-2007 Anchorage, and Grip and Coupler for Prestressing Tendons. They fully comply with the requirements of the Suggestions on Acceptance and Application of Post-tensioned Prestressed System by the International Federation for Prestressed Concrete (FIP).
Liuzhou HM Prestressing Machinery Co., Ltd.


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