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 Elevator link
1.Description
⑴DH forged elevator links are designed to hang elevators form Top Drive System or Hooks in drilling operation.Read the manual before use elevator links.
⑵Each elevator link of one pair is forged form one single billet of high strength alloy steel,heat treated,surface-strengthen-treated and NDT for super performance and long service.The rating loads of elevator links series are 40t(355kN)-750t(6670kN).
⑶All the technical data and properties of elevator links completely conform to the requirements of SY/T5112 and Api Spec 8C.
2.Structural Principle
Elevator links can work in pairs. The elevator link upper eye is used for the hook link ear, and the elevator link lower eye is used
for the elevator.
3.Technical Specification
Chart for thchnical specifications of DH elevator link series:

specifications

Rating loads

Length(mm)

US ton

kN

DH40

40

355

1200

DH50

50

450

1100

DH65

65

580

1200

DH75

75

665

1500

DH100

100

890

1500

DH150

150

1350

1800

DH200

200

1800

2700

DH250

250

2250

2700

DH350

350

3150

3300

DH500

500

4500

3600

DH750

750

6670

3660

note: ①1US ton≈8.896kN
         ②The elevator links of the specifications in this chart are manufactured by our company, other specifications our customer required can be defined in contract.

4.Usage and operation
⑴Check the safety working load elevator links prior to use;
⑵Ensure rating elevator links can match with the hook and elevators;
⑶Checked if elevator links of one pair are bundled up together and if the stampde numbers are the same;
⑷Hang the bigger eyes of elevator links to hook,and engage elevator ears to smaller eyes of elevator links,and insert safety pins of elecators to assure safety.(Note:The bended ends of the lower eyes shall be inward)
⑸Each elevator links have been strictly tested in workshop.Exanimate elevator links for crack after each operation(it is recommedded that the NDT shall be carried out every three months or after each operation),for high stress areas of the elevator links shall conform to specifications of JB 4730 and other areas shall conform to specifications Ⅲ.When crack is found,the use of elevator links should be prohibited.And the results of the NDT should be recorded for traceability(see high stress of elevator links).
⑹Use elevator links vertically in operation.
⑺Not to overload elevator links(less then dynamic and static load) .
⑻Stop ues elevator links with over wear in the upper or lower surface of two eyes in found.(wear is more than 3mm)
⑼When the temperature is below minus 20℃,stop use elevator links.

High stress of elevator link(hatched areas are for high stress)

5.Maintenance
⑴Keep elevator links clean;
⑵Coat elevator links with grease for rust,and stored in well-ventilated place;
⑶Check elevator links for crack or over wear prior tu use,stop use any elevator links with crack or over wear.
⑷NDT exanimate elevator links after each operation for safety operation.
⑸Not to repairing or welding elevator links.

6.Transportation and storage
⑴Prevent elevator links form raining.
⑵Keep elevator links away from acids,alkalis,salts and other corrosive substance.

7.Other
⑴We responsible for exchange for maintenance without charge due to the quality for 12 months from elevator links service or 18 months from delivary.
⑵Attached with elevator links are quality certificate,Packing list and usage manual.
⑶Select elevator links in chart.
⑷We can design and manufacture elevator links for field service such as elevator links used at temperature from minus 20℃ to minus 40℃.

 Perfection Link
1.Description
⑴SH dependable, efficient perfection links are designed for light loads. Perfection links are made by forging, bending and electric welding of high-quality steel bar stock, which is then heat-treated and NDT examined. Rating loads of perfection links series are 50t (450kN), 75t (675kN), 150t (1350kN).
⑵All the technical data and properties of perfection links completely conform to the requirements of SY/T 5035 and API Spec 8C.
2.Structural
Perfection links can work in pairs. Bigger end of perfection link is for the hook link ear, and small end is for the elevator.
3.Specifications for SH Perfection Links
Chart for specifications of SH Perfection links :

specifications

SH 50

SH 75

SH 150

Rating loads

50t(450kN)

75t(665kN)

150t(1335kN)

Length

1100mm

1500mm

1800mm

1. 1 US ton≈8.896Kn 2. Specifications for perfection links in chart1 are manufactured in our company; other specifications for field service are available as per purchase order.


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