7 Ton Overhead Line Hydraulic Tensioner for Two conductors stringing with American Cummins Engine

Model: SA-YZ2X35
Place of Origin: Zhejiang,China (Mainland)
Brand Name: Dongfang
Overhead Line Equipment: 7 Ton Overhead Lines Tensioner
Model: SA-YZ2X35
Max. Tension force: 7 Ton 70 KN
Max. Stringing Speed: 5 km per hour
Max. pulling back force: 6 Ton 60 KN
Max. pull back speed: 1.2 km per hour
Max. diameter of conductor: 32 mm
Quantity of conductors: 2 conductors


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Product Description

Payment & Shipping Terms Supply Capacity
Unit Price:50000.0 USDProduction Capacity:20 sets per month
Trade Term:FOB,CFR,CIF,CIP,EXWPacking:container plywood case
Payment Terms:L/C, T/TDelivery Date:30-45 days
Min. Order:1 Set/Sets
Means of Transport:Ocean

7 Ton Hydraulic Tensioner is used for two or single conductors stringing on 220 KV transmisson line. It is equipped with Water Cooled Cummins diesel engine, and Rexroth hydraulic pump, Italian R.R. reducer, AKG radiator, and Wika Hydraulic instrument.


Ningbo Dongfang Macinery of Power Co., Ltd. is known as the leading manufacture of transmission line stringing equipment and tools in China, for supply safe, reliable and competitive products to the world market. During the last 25 years, Ningbo Dongfang became from a local manufacture to the leading manufacture in China. The products of transmission line stringing equipment and tools have been exported to more than 40 countries. The hydraulic conductor puller and hydraulic conductor tensioners are main products of Ningbo Dongfang. From 1998, Ningbo Dongfang started to produce hydraulic conductor puller and hydraulic conductor tensioner with the cooperation of National Power Company in China.

There are three important steps for selection of hydraulic conductor tensioner:

First, it is important to know the diameter or model of biggest conductor in transmission line project, because the weight of conductor can be used to calculate the tension force on conductor.

Second, how many conductors in one phase of transmission line? Is it single conductor, two conductors, or four conductors transmission line?

Third, How is working condition of construction site? Is it Mountain area or flat lands? Are there big rivers or forest in the stringing section? Are there any corner towers in one stringing section? How many towers are there is one tension section?


For example, if we have a 220 KV transmission line in flat lands, it is two bundled conductors transmission line, the diameter of ACSR conductor is 28mm, the weight of conductor is about 1500 kg/km. if the pulling length is 5-6 kms per tension section. The tension force is about 1.5 ton per conductor, so we can use 6 ton (2X3 ton) Hydraulic conductor tensioner for the job, please note normally the tension force is lower than pulling force, because the pulling force is consumed on the transmission line during the stringing. After choosing the tensioner, we can select the puller. If we pull the same conductor on mountain area, we will have to use 8 ton hydraulic tensioner and 9 ton hydraulic puller.

Normally, experienced engineering people will choose the hydraulic conductor tensioner according to their own experience and the requirement in the future. If you are stringing two conductors now (9 ton puller with 8 ton tensioner), and will have four conductors stringing project in the future, customer will consider to use 2 of 8 ton tensioners (combination) in future projects.


7 Ton Hydraulic Tensioner SA-YZ2X35 for 2 bundled conductors

Item No.



SA-YZ 2X35

Max. Tension Force (KN)

2X35 or 1X70

Continuous Tension Force (KN)

2X30 or 1X60

Max. Stringing Speed(km/h)


Max. Pullback force (KN)

2X30 or 1X60

Max. Pullback speed (km/h)

2 X 1.2

Diameter of wheel (mm)


Number of grooves


Max. Conductor Diameter (mm)


Model of Engine


Power of Engine

38 KW

Rotate Speed of Engine (rpm)


Electrical system:


Weight (kg)


Dimension (m)

4.10 x 2.10 x 2.60


Application: It is suitable to string two bundled conductors or single conductor in overhead transmission line.


-          Closed hydraulic circuit, infinitely variable tension force control in both directions.

-          The max. tension/pull back force for conductor stringing operation can be presetted, the tension /pull back force can be read from the tension gauge of machine.

-          Spring applied hydraulic released brake acts automatically in case of hydraulic failure to ensure line safety

-          Hydraulic oil cooling system

-          Bull wheels lined with wear proof MC nylon lining segments

-          With 2 hydraulic power outlets to control 2 sets of hydraulic reel stands.

-          Hydraulic front jack

-          Mounted on trailer with rigid axle for towing at max. speed of 15 km/h


Main components:

-          Engine: Cummins water-cooled diesel engine

-          Main variable displacement pump and main motor: Rexroth (German)

-          Reducer: R.R. (Italian)

-          Main hydraulic valves: Rexroth (German)

-          Hydraulic Instrument: WIKA

-          Quick couplings: EMB

-          Radiator: AKG


We have designed and manufactured whole series of tensioners for single conductor to six bundled conductors stringing from 33 KV up to 1000 KV transmission line construction.


Our Series of Hydraulic Conductor Tensioner


Max. Tension Force


Max. Diameter of Conductor


30 KN

Single conductor or OPGW

32 mm


40 KN

Single conductor or OPGW

40 mm


70 KN

Single or Two Conductors

32 mm


80 KN

Single or Two Conductors

40 mm


100 KN

Single or Two Conductors

40 mm


110 KN

Single or Two Conductors

40 mm


140 KN

Single or Two Conductors

42 mm


160 KN

Single or Two Conductors

45 mm


160 KN

Four or Two conductors

40 mm


160 KN

Four or Two conductors

40 mm


180 KN

Single or Two Conductors

45 mm


180 KN

Four or Two conductors

40 mm


200 KN

Four or Two conductors

45 MM



1. The machine will be shipped in container

2. We will ship the products within one month normally after receiving the payment.

3. Stock is available for standard product.



1. The machine will be loaded in container and fixed with steel wire rope.

2. The accessory and operation manual will be packed in plywood case.


1. We accept T/T and L/C.

2. Please send swift copy of T/T if you arrange payment by T/T

3. Please send us the L/C draft to us before issue L/C.


Why choose us:

1. High quality and competitive price, more than 30 engineers working in the design and quality control department.

2. Leading and biggest manufacture for stringing equipment in China.

3. 25 years of production experience and more than 1000 customers in the country and abroad market. The set of 9 ton puller and 7 ton tensioner have been sold to more than 20 countries.

4. Big stock condition for fast shipment.

5. Detailed pre-sales service and fast active after-sales service. Response within 12 hours after-sales service

Category: Overhead Conductor Tensioner