China Post Tension Stressing Jacks Manufacturers ...

Products Description

For more information, please visit Ruiyi.

By stressing prestressing strands or wires after multi strand post tension jack ensures that equal tension is applied. It allows measurements of both the prestressing force and elongation. 

For the whole prestressing pocess, post tension stressing jack is matched with tool anchorage and wedge to stretch PC strand. It is powered by pump, calibrated gauge readings indicate the tension force applied to tendon. based on different model, tension force is from 70tons to 650tons. The jacks is linked with two ends of tendons and ensure two sides are fully stretched. if only one side is stretched, the other side should be fixed, we call it dead end such as swage end which is formed by swaging socket and spring.

Post tension tendon loss includes: duct friction loss, anchor loss, elastic compression loss, steel stress relaxation loss, and concrete contraction loss. The first three occurred in the tension stage, called instanta loss, and the latter two were long -term losses. In addition, anchor mouth friction loss should be included.

Advantage of main components

Cylinder

1. 40Cr forging material is adopted, resistant to ultra-high pressure and not easy to deformation.

2. Oil cylinder inner hole is olled to improve surface strength and hardness, improve surface wear resistance and extend service life.

3. The oil cyinder and end cover are connected by internal thread, with good overall force and high safety factor.

Plunger

The piston is processed by integral forging parts, with superior mechanical performance and durable service.

Steering method

The guide part adopts surfacing copper technology, the guide length of piston ring is longer, the guide performance is good, the ability of resisting partial load is strong, it has the advantages of wearresisting, pressure-resisting, corrosion-resisting, etc, and it is easy to disassemble and assemble, and spare parts can bereplaced without special tools.

Sealability

in the dynamic seal using green ring instead of 0-ing, green ring use pressure up to 80Mpa, the temperature range of -60-+200C,using green ring seal effect is better, more reliable.

Specification:

Type

Nominal
tension force

KN

Nominal oil pressure

 

Bar

Tension piston area

 

M²

Return piston area

 

M²

Return oil pressure

 

Bar

Coss-core aperture

 

CM

Stroke for tension

 

CM

Overall size ΦA×L

 

 

CM

Weight

 

 

 

KG

LA70B

705

510

1.382×10-²

0.636×10-²

<250

Φ6

20

Φ18.8×33.0

40

LA100B

973

510

1.908×10-²

0.534×10-²

<250

Φ7.8

20

Φ21.6×33.7

60

LA150B

510

2.927×10-²

1.609×10-²

<250

Φ10.3

20

Φ28.3×37.6

117

LA200B

530

3.769×10-²

2.168×10-²

<250

Φ12

20

Φ31.0×37.8

130

LA250B

540

4.594×10-²

2.803×10-²

<250

Φ14

20

Φ34.5×38.2

188

LA300B

510

5.904×10-²

3.518×10-²

<250

Φ14.5

20

Φ38.5×38.2

230

LA350B

Recommended article:
What are the different types of milling collets?
5 Must-Have Features in a Water Wave Stainless Steel Sheets
The Advantages of Utilizing Custom Cleaning End Brushes

If you are looking for more details, kindly visit wholesale post tension wedges.

520

6.786×10-²

3.463×10-²

<250

Φ16.5

20

Φ41.0×38.9

280

LA400B

520

7.611×10-²

4.595×10-²

<250

Φ17.5

20

Φ44.0×38.9

315

LA450B

510

8.804×10-²

5.788×10-²

<250

Φ17.5

20

Φ46.5×41.3

364

LA500B

500

10.05×10-²

4,775×10-²

<250

Φ19.6

20

Φ49.5×41.8

445

LA600B

500

12.1×10-²

6.83×10-²

<250

Φ19.6

20

Φ53.0×44.3

550

LA650B

500

13.13×10-²

6.291×10-²

<250

Φ24

20

Φ57.0×44.5

610

we are glad to get advice from you for the following items.

· Anchor manufacturing

· Strand pushing

· Wedge seating

· Anchor testing

· Stressing force measurement

· Calibration

· Selection of the appropriate stressing equipment

· Stressing of stay cables using multi-stressing or single-wire stressing jacks

Customized products

The first and second pictures are 500tons stressing jack, stroke is 200mm, with one 180mm extension cylinder, hanging hook, one tooling anchor and limiting plate etc. this jack is for a Singapore client, all the jack's design and dimension is based on client's drawing and requirments. This client was very satisfied with everything, and placed order again.

The third picture is 250tons mono strand jack with 500mm stroke, it was for a Guam client. The fourth picture is a open and close anchor, also for this Guam client. We have built long term relationship with this client.

 

Minimum working space for jack

Below drawing and dimension for each model is jack installation requirement.

• Model Minimum working space
  B*C(mm) Reserved length of PC stand
  A(mm)

  LA70B

  *120 590

  LA100B

  *150 570

  LA150B

  *190 570

  LA200B

  *210 590

  LA250B

  *220 590

  LA300B

  *250 620

  LA350B

  *255 620

  LA400B

  *265 620

  LA500B

  *295 620

 

Common FAQS

*How to choose lubricant?

If temperature is below zero, please use32# hydraulic oil

If temperature is above zero, please use 46# hydraulic oil. AW 46 Hydraulic Fluid or Mobil DTE 25 Ultra ( Equivalent ISO VG 46, Anti-wear hydraulic oil) is equal to  46# hydraulic oil

*Can you provide factory tour?

If you don't have time to visit our factory, and you can video call to check workshop and production details.

*how to confirm the right product before delivery?

Normally we provide update date sheet, drawing, test report, training VOD and other requested certificate

*how to make payment?

we discuss payment method with client before order. Normally, 30% is paid before production start, 70% is paid before shipment delivery(customer can arrange their freight agent to pick up goods at our factory). you can pay by wire transfer, paypal or other accepted method.

*What is your shipping way ?
Express (DHL,Fedex,TNT),By air ,Or Sea. We will choose one shipping way to suit customers request .

 

Should you be interested in Post Tension Stressing Jacks or any stressing jack equipment, please contact us directly. 

:

Mobile /:-

Universal Fit: Curved Wedges for Any Aluminum Forming Brand

Utilize our curved aluminum form wedges (also known as a curved wedge bolt) for a safe and effective concrete pour. They are compatible with all aluminum forming brands, ensuring a perfect fit. With their curved design, they offer clear benefits such as increased hammer clearance, less chance of damaging the form face, and easier set-up insertion.

In addition, these aluminum wedges undergo a heat treatment process to increase their strength and durability, and their tapered structure enables quicker stripping after the concrete has solidified. These curved aluminum form wedges are a highly useful time-saving resource for any concrete forming project.

Please Note*

• Round Head Aluminum Form Pin Sold Separately
• Quantities of 20,000 or more have 60 day lead time.

Sandbaggy carries a variety of concrete forming supplies and accessories.

Specs

• Material: Heat-Treated Steel
• Gauge: 11
• Length: 4 inch
• Width (thinner end): 1/4 inch
• Width (wider end): 1-1/4 inch
  
• Reusable: Yes

Features

• Compatible With All Major Aluminum Forming Brands: Utilized in conjunction with form ties and form pins to tighten adjoining concrete forms, these wedges effectively secure the forms in place. Curved wedges have the same function as straight wedges
• Ideal for Large Projects and Tight Spaces: Ideal for forming systems with large cross member support, curved wedges are also highly effective in limited access situations due to their unique curved design, which provide additional clearance for hammering.
• Construction-Grade Strength: The 11-gauge steel has been heat treated to increase the steel strength and durability. 
• Increased Installation Safety: The curved design enables effortless installation and reduces the chance of damaging the concrete form's surface.
• Tapered Design allows for faster stripping.

FAQ

What is a concrete form wedge?

Concrete form wedges are a vital component in securing concrete forms during the pouring process. There are a variety of types, but typically they are used in conjunction with formwork pins, ties, or brackets to ensure the stability of the forms. They are commonly hammered in place to create a tighter fit between the pins, ties, or brackets and the formwork panels. 

Curved Wedges Vs Straight Wedges? 

Using curved wedges or straight wedges will depend on the situation. Curved wedges can offer the added benefits of:

1. being easier to install in limited access situations
2. reduced risk of damage to face of concrete form

What is heat-treated steel?

The process of heat treatment involves subjecting steel to controlled heating and cooling in order to modify its physical characteristics. Some advantages of heat treatment include:

Contact us to discuss your requirements of bulk supply post tension anchor. Our experienced sales team can help you identify the options that best suit your needs.

• Increased Strength
• Improved Toughness - more resistant to cracking or breaking under pressure.
• Enhanced Ductility (In some cases) - meaning it can deform without breaking. 
• Stress Relief - relieves internal stresses in steel that can occur during manufacturing processes.