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United States
Carrier
CostDelivery TimeTracking
ePacket
$ 1.72 0-27 daysAvailable
4PX Express
$ 3.45 0-27 daysAvailable
China Post Air Mail
$ 14.21 0-27 daysAvailable
China Post Air Parcel
$ 22.98 0-27 daysAvailable
EMS
$ 34.8 0-27 daysAvailable
Fedex IP
$ 44.65 0-27 daysAvailable
DHL
$ 53.93 0-27 daysAvailable
UPS Express Saver
$ 89.78 0-27 daysAvailable
4D Series Aluminum Aeolian Vibration Dampers 383mm
4D Series Aluminum Vibration Damper
4D series Vibration Damper is a turning fork multi-resonant Vibration Damper founded by Stockblique, and is mainly used in the dispeling and dispersing of the impact energy on the cable caused by the breeze .
1,Specification:
11.1
| Model | Clamp Dia. Range(mm) | Total L(mm) | Clamp W(mm) | Weight(kg) |
| 4D-30-27.0 | 27.0-22.3 | 383 | 52 | 2.5 |
| 4D-30-23.4 | 23.4-19.5 | |||
| 4D-30-20.3 | 20.3-16.5 | |||
| 4D-30-18.0 | 18.0-15.0 | 383 | 52 | 2.5 |
| 4D-30-16.0 | 16.0-14.0 | |||
| 4D-30-14.0 | 14.0-12.2 | |||
| 4D-20-27.0 | 27.0-22.3 | 330 | 52 | 1.4 |
| 4D-20-23.4 | 23.4-19.5 | |||
| 4D-20-20.3 | 20.3-16.5 | |||
| 4D-20-18.0 | 18.0-15.0 | 330 | 52 | 1.4 |
| 4D-20-16.0 | 16.0-14.0 | |||
| 4D-20-14.0 | 14.0-12.2 |
2,Collocation:
It is usually used for vibration insulation of OPGW fiber, also include ADSS fiber.
11.2 The scheme table for the installation quantity of OPGW Vibration damper
| Cable Dia.(mm) | Span(m) | |||
| d<12 | 100~300 | 300~600 | 600~900 | |
| 12≤d<22 | 100~350 | 350~700 | 700~1000 | 1000~1200 |
| Qty | 2 | 4 | 6 | 8 |
11.3 The scheme table for the installation quantity of ADSS Vibration damper
| Cable Dia.(mm) | Span(m) | |||
| d<12 | 100~250 | 250~450 | 450~700 | |
| 12 | 100~250 | 250~500 | 500~800 | 800~1000 |
| Qty | 1 | 2 | 4 | 6 |
At critical span, usually use more vibration damper for safety.
3,Choose Model:
When choosing the damper, two factors should be taken into consider, one is damper weight, the other is diameter of the cable. Considering all mainly factors of the OPGW fiber, such as Tensility, wind speed, landform…, and so on. Then make the decision of damper model. Choose of weight
Z=(T*M)1/2 academic formula: Z=(T*M)1/2
Meaning: Z means characteristic impedance of fiber, it decides the model of vibration.
When Z over 110, used the 4D-30 model. If not bigger than 110, use the 4D-20 model
T---18%-25% rated tensile strength of fiber(KN) M—the weight unit of fiber kg/km
11.5 Choose of Clamp Dia. Range(mm)
The clamp Dia. Range is the Dia.of fiber with doubled Dia.for preformed rods of Tension set(suspension set).If installed the armour rod, the clamp Dia.range will be Dia. of fiber with doubled Dia. of Armour rods.
Our products are shipped from China, the dispatching date will be commenced in few business days after the finishing of QC from the related department.
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Expedited shipment
The changing of the shipping methods may have occurred when we are noticed from customer for the needing of rush order or lower rate of shipment delay. The related request is acceptable whenever in prior of the order is dispatched and heading to the designated shipping address.
Note: (PO) boxes or FPO/APO military addresses can only be shipped out by standard shipping method).
The shipping fare for the expedited shipment method may higher than the standard one you chose for, then please be aware that you may ask to pay for the balance for the pertinent shipment substitution. You are welcome to contact our customer service via “contact us” for further inquiry and requisition
Shipping cost all about
It is deeply appreciated to take your kind pardon for any misunderstanding about the shipping price due to the package is shipped from China.
The contract we have stipulated with FedEx, DHL, UPS and EMS is already set and therefore all merchandise is sent via Air rather than Ground. While this may not be the most cost effective for all customers, in terms of delivery time, ease of shipment and reliability we have determined that this is the most effective overall.
The shipping cost for all merchandises are displayed by adding items to your shipping bag, you can estimate shipping time and cost and acquire more shipping cost information from our site.
International Shipping
International shipping costs are calculated in U.S. currency based on estimated shipment weight and destination. Shipping costs for orders placed on the website are fairly accurate, but there are times when those estimates are incorrect. If we need to adjust shipping charges for your order we will contact you to authorize those additional shipping charges.
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