Center Latch Elevators of Type DD/TA with API 8C Standard

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1 watt
Supply Capability:
1000 watt/month
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Product Description:

API 8A DD center latch elevator 150T,250T,350T 2 3/8 -5 1/2 Casing Elevator API standard Drill Pipe Elevator DD Tubing elevator

Model DD center latch elevator with square shoulder are suitable for handling drill collar, casing and tubing. The load ranges from 150 tongs to 350 tongs. The size ranges from 2 3/8" to 5 1/2" in. The products are designed and manufactured according to the requirement in API Spec 8C Specification for Drilling and Production Hoisting Equipment.

Center Latch Elevators of Type DD/TA with API 8C Standard



   Rate Cap.

 (Short Tons)





2- 5 1/2

4 1/2-5 1/2

2 3/8-4 1/2



2 3/8-5 1/2

4 1/2-5 1/2

2 3/8-4 1/2



2 3/8-5 1/2

4 1/2-5 1/2

2 3/8-4 1/2


Packaging & Delivery

  • Packaging Details

  • 1 set/plywood case

  • Port

  • Shanghai Port or other

  • Lead Time:

  • Quantity(Sets)1 - 1011 - 30>30
    Est. Time(days)720To be negotiated


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Q:What does the elevator room mean, who told me
Is the elevator with the elevator chanting
Q:What is the width of the elevator?
Less than 2 meters. Anyway, I went to a lot of places, are not two meters wide
Q:What is the safety contact of the elevator?
Safe circuit, the normal state is through. All the places involving safety will have a contact, the engine room, the pit, the car door, each elevator door, all contacts in series together, any point off, the elevator can not move
Q:What are the contents of the elevator property every day?
Regret the kitchen flue did not play out, and now as long as the building was cooking, their own off the hood must also open at the same time, or full of smoke
Q:How to determine the balance coefficient of elevator GB
The balance factor (K) is a familiar and unfamiliar parameter for elevator professionals. It is known because we all know that the traction elevator has a balance of the weight of the configuration, all know that the national standard in the provisions of the balance coefficient should be in the range of 40% to 50%. (1) directly weighing P and W balance coefficient K is not a mysterious parameter. In the final analysis it is to configure the weight of the weight of the weight, so the balance coefficient K is determined by the balance coefficient design value to configure the weight. This method is cumbersome to operate, and the other parts of the weighing is difficult to achieve without omission, generally not applicable. (2) According to the known K value, the weight of the weight is determined from the balance coefficient K. When the load corresponding to KQ / H is loaded in the car, the static moment on both sides of the traction wheel should be balanced. If you know the design value of the balance factor, simply load the load and verify that it is balanced. The easiest way to verify is to release the brake on the mainframe, and use the manpower to feel the torque balance on both sides of the traction wheel on the hand wheel to increase or decrease the weight. (3) According to the existing weight, it is recommended to use the method of measuring the traction motor current on the national standard. The basic principle is: when the elevator for uniform operation, the traction motor shaft output torque converted to the motor shaft, the elevator mechanical transmission resistance resistance torque (referred to as resistance torque)
Q:What is the meaning of elevator fire linkage?
Function the same, control the location of different elevators, fire linkage is the fire switch extends to the abduction center, and feedback to the first floor after the elevator to open the door signal
Q:When the girl came home, she was tracked by a man when she entered the elevator.
It's so simple. Girl from the bag inside out of a submachine gun on the line
Q:What are the doors of the elevator?
1: you are talking about the 6-sided body, one side is the door (car door), or how it will open? 2: each layer also has a door, we called: hall door 3: car door is with the elevator up and down together The car door open, while the mechanical drive to drive the door at the same time open is so simple, you do not understand, you can ask me again
Q:The house has been renovated, no reserve wells, but now want to install the elevator, how to do?
I had to help my relatives in an elevator show on the scene, see some very good home elevator. Like you like this, I suggest you look at a Cibes called the home elevator. Do not know your aunt home now house the number of reserved space, there is no way it does not matter, their home elevator can be designed according to the space of the house, do not account for much of the place, at least only 1 square meter (do not know is not true). Say that your house there is a layer of the ground, if this pit is not easy to engage in, they do not need the end of the pit pit, can be installed down. It should be said that these, you have a good look, the site is not posted, so that posted ads, you go to Google can. Want to adopt ~ ~
Q:Recently a very hot online IQ question: elevator can take up to 10 people, you happen to be the first 10, into the elevator
Answer: a elevator is very normal 9 people, yes, that is normal, ordinary people, you go to the elevator, the elevator door open, you go in, the elevator did not move, so you quit, you think the elevator overweight, In fact, no, because someone outside the hold down the door button, this person is tracking you, want to kill you, you come out after he hid, you feel the victim, the alarm answer two elevator 9, you take the elevator Go, follow your people has been behind you, and you entered the elevator together, but you did not find that you entered the elevator, the elevator now a total of 11 people, you quit. Feel the terror of the track, and nine people in the elevator is likely to be the same prisoner, you answer the alarm three elevator is 9 individuals, but there is a corpse, and a hair into a tumbler Standing, you simply did not find that you go after the elevator does not move, you quit, the alarm personal tendency is the answer one and two, the answer two best, reference

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