BSW-Series Square Drive Hydraulic Torque Wrench Manufacturer in China

High-Precision Hydraulic Torque Wrenches for Industrial Bolting Applications

LONGLOOD BSW-Series Square Drive Hydraulic Torque Wrenches are designed for accurate, seguro, and efficient bolt tightening and loosening in demanding industrial environments. Featuring aerospace-grade alloy construction, advanced 3D CAD engineering, and precision hydraulic drive technology, these tools provide reliable torque output with accuracy up to ±3%.

With torque ranges from 183 Nm to 72,000 Nm, the BSW Series covers a wide variety of fastening applications, including oil & gas, xeración de enerxía, petroquímica, construción, minería, construción naval, and heavy equipment maintenance.

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Key Features of BSW-Series Hydraulic Torque Wrenches

High-Strength Aerospace Material Construction

The BSW Series features a high-tech aerospace alloy body manufactured through integrated molding technology.

Benefits include:

• Excellent strength-to-weight ratio
• High durability under heavy loads
• Improved corrosion resistance
• Long service life in harsh industrial environments

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Precision Torque Control ±3%

Designed with advanced 3D CAD engineering, LONGLOOD hydraulic torque wrenches provide:

• Accurate torque output
• Stable hydraulic performance
• Reduced risk of bolt over-tightening or under-tightening
• Reliable repeatability during critical bolting operations

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Quick Release Square Drive System

The square drive design allows operators to quickly switch between:

• Tightening operations
• Loosening operations

No special tools are required, improving working efficiency and reducing downtime.

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360° Swiveling Hydraulic Inlet Port

The hydraulic inlet port rotates 360°, providing:

• Flexible positioning
• Easy operation in confined spaces
• Reduced hose twisting
• Improved operator safety

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360° Fine Adjustment Reaction Arm

An optional adjustable reaction arm provides:

• Better reaction point positioning
• Increased application flexibility
• More accurate torque transfer
• Improved safety during operation

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Aplicacións

LONGLOOD BSW-Series Hydraulic Torque Wrenches are widely used in:

• Aceite & gas pipeline maintenance
• Petrochemical equipment installation
• Wind power projects
• Power plant maintenance
• Steel structure construction
• Shipbuilding and offshore industries
• Mining equipment servicing
• Heavy machinery assembly

Suitable for:

• Flange bolt tightening
• Large industrial fasteners
• High-strength structural bolts
• Pipeline connections

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BSW-Series Hydraulic Torque Wrench Specifications

Modelo	Square Drive Size	Rango de par (Nm)	Tamaño do parafuso (M)	Peso
BSW-1	3/4"	183-1837	M16-M36	2 kg
BSW-3	1"	451-4512	M22-M48	4 kg
BSW-5	1-1/2"	752-7528	M27-M56	7 kg
BSW-8	1-1/2"	1078-10780	M30-M64	9.1 kg
BSW-10	1-1/2"	1551-15516	M36-M72	13.1 kg
BSW-20	2-1/2"	2666-26664	M42-M90	25 kg
BSW-25	2-1/2"	3572-34725	M48-M100	31 kg
BSW-35	2-1/2"	4866-48666	M64-M120	45 kg
BSW-50	2-1/2"	7200-72000	M72-M125	87 kg

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Technical Design Advantages

Lightweight and Compact Structure

Compared with traditional bolting equipment, the BSW Series offers:

• Compact profile
• Reduced operator fatigue
• Easy transportation
• Access to restricted working areas

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High Torque Output

The wide torque range allows one tool series to handle:

• Small industrial bolts
• Large flange connections
• Heavy-duty structural fastening applications

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Reliable Hydraulic Performance

The hydraulic drive system provides:

• Smooth torque application
• Constant output force
• Controlled tightening accuracy

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Why Choose LONGLOOD Hydraulic Torque Wrenches?

Professional Hydraulic Tool Manufacturer

LONGLOOD specializes in hydraulic tools and industrial bolting solutions, supplying professional equipment for global distributors, contractors, and industrial users.

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OEM & ODM Capability

Available customization:

• Logo marking
• Product color
• Packaging design
• Accesorios
• Technical documents

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Complete Hydraulic Bolting Solution

LONGLOOD provides:

• Hydraulic torque wrenches
• Hydraulic pumps
• Tensores hidráulicos
• Hydraulic nuts
• Nut splitters
• Accessories and spare parts

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Frequently Asked Questions (FAQ)

1. What is the torque accuracy of the BSW hydraulic torque wrench?

The BSW Series provides torque accuracy of ±3%, ensuring reliable and repeatable bolt tightening performance.

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2. What industries use hydraulic torque wrenches?

They are commonly used in:

• Oil and gas
• Petrochemical
• Power generation
• Wind energy
• Construción naval
• Heavy equipment maintenance

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3. How does a hydraulic torque wrench work?

The hydraulic pump delivers high-pressure oil to the wrench cylinder, generating controlled torque output to tighten or loosen bolts accurately.

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4. What square drive sizes are available?

The BSW Series offers:

• 3/4"
• 1"
• 1-1/2"
• 2-1/2"

square drive options.

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5. Can the reaction arm be customized?

Si. LONGLOOD offers optional extended and adjustable reaction arms for special applications.

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6. Can these tools be used for bolt loosening?

Si. The quick-release square drive allows easy switching between tightening and loosening operations.

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7. Do you provide complete hydraulic torque wrench kits?

Si. LONGLOOD can supply complete solutions including:

• Hydraulic torque wrench
• Hydraulic pump
• Hose
• Couplers
• Accesorios
• Carrying case

How to Use a Hydraulic Pump Safely and Correctly

A hydraulic pump is the power source that converts mechanical force into hydraulic pressure to operate hydraulic cylinders, tomas, tiradores, chaves dinamométricas, and other hydraulic equipment. Proper operation ensures maximum performance, seguridade, and longer service life.

Hydraulic Pump Operating Guide

1. Check the Hydraulic System Before Operation

Before using the pump, inspect all components carefully.

Check:

• Hydraulic pump condition

• Hydraulic oil level

• Hose condition

• Couplers and fittings

• Pressure gauge

• Hydraulic cylinder or tool connections

Make sure:

• There are no oil leaks

• All connections are tight

• The working pressure rating of all components matches the pump pressure

Never use damaged hoses, leaking fittings, or worn hydraulic components.

2. Select the Correct Hydraulic Oil

Use the recommended hydraulic oil specified by the manufacturer.

Before operation:

• Check oil level in the reservoir

• Add hydraulic oil if required

• Avoid mixing different types of hydraulic oil

• Keep oil clean and free from contamination

Contaminated hydraulic oil can damage:

• Pump valves

• Selos

• Cylinders

• Internal hydraulic components

3. Connect the Hydraulic Components

For a typical hydraulic cylinder system:

Connection order:

1. Connect hydraulic hose to the pump outlet

2. Connect the other end of the hose to the cylinder coupler

3. Install the pressure gauge if required

4. Ensure all couplers are fully locked

Make sure:

• Couplers are completely engaged

• Dust caps are removed before connection

• Connections are free from dirt and debris

4. Open the Hydraulic System

Before pressurizing:

• Open the release valve completely

• Confirm the cylinder piston is fully retracted

• Ensure the load is correctly positioned

For electric or air-powered pumps:

• Confirm power supply matches pump requirements

• Check motor rotation direction if applicable

• Ensure emergency stop functions properly

5. Operate the Hydraulic Pump

Manual Hydraulic Pump

For hand pumps:

1. Close the release valve

2. Move the pump handle up and down

3. Hydraulic pressure will increase

4. Monitor the pressure gauge

5. Stop pumping when the required pressure or position is reached

Bomba hidráulica eléctrica

For electric pumps:

1. Connect the power supply

2. Start the pump motor

3. Use the control valve to extend the cylinder

4. Monitor pressure on the gauge

5. Stop operation when the required force is achieved

Air Hydraulic Pump

For air-driven pumps:

1. Connect compressed air supply

2. Adjust air pressure according to specifications

3. Activate the control valve

4. Monitor hydraulic pressure

5. Stop when the operation is complete

6. Monitor Pressure During Operation

Always observe the pressure gauge.

Important:

• Never exceed the rated pressure

• Maximum operating pressure is commonly 700 bar (10,000 psi) for many industrial hydraulic systems

• Avoid sudden pressure increases

• Stop immediately if abnormal noise, vibración, or leakage occurs

7. Releasing Hydraulic Pressure

After completing the operation:

1. Stop the pump

2. Slowly open the release valve

3. Allow hydraulic pressure to decrease gradually

4. Confirm the cylinder returns safely

5. Disconnect hoses after pressure reaches zero

Never disconnect hydraulic hoses while the system is pressurized.

8. Hydraulic Pump Maintenance

Regular maintenance improves reliability.

Daily Inspection

Check:

• Fugas de aceite

• Hose damage

• Coupler condition

• Oil level

• Pressure gauge accuracy

Regular Maintenance

Realizar:

• Hydraulic oil replacement

• Filter cleaning or replacement

• Seal inspection

• Hose replacement when worn

Common Hydraulic Pump Problems and Solutions

Problem	Possible Cause	Solution
Pump cannot build pressure	Low oil level	Add hydraulic oil
Cylinder moves slowly	Air inside system	Bleed air from hydraulic circuit
Oil leakage	Damaged seal or fitting	Replace damaged parts
Pump becomes noisy	Low oil or contaminated oil	Check and replace oil
Pressure cannot hold	Valve leakage	Inspect valves and seals

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Safety Tips When Using Hydraulic Pumps

✔ Always use equipment within rated capacity
✔ Wear safety glasses and protective equipment
✔ Keep hands away from moving hydraulic components
✔ Use stable lifting surfaces
✔ Do not stand under suspended loads
✔ Never modify hydraulic components
✔ Release pressure before maintenance

Hydraulic Pump and Cylinder Compatibility

Before selecting a pump, confirm:

Single Acting Cylinder

Requires:

• Single acting hydraulic pump

• Hydraulic hose

• Gauge

• Release valve

Double Acting Cylinder

Requires:

• Hydraulic pump with a 4-way directional valve

• Two hydraulic ports

• Correct return circuit

Using the wrong pump type may prevent the cylinder from operating correctly.

Frequently Asked Questions (FAQs)

1. How do I start a hydraulic pump?

First check oil level and connections, close the release valve, then operate the pump handle or start the motor depending on the pump type.

2. How much pressure can a hydraulic pump generate?

Industrial hydraulic pumps commonly operate up to 700 bar (10,000 psi), while some special high-pressure pumps can reach higher pressures.

3. Why is my hydraulic pump not building pressure?

Common reasons include:

• Low hydraulic oil level

• Air in the system

• Loose connections

• Selos danados

• Faulty valves

4. Can one hydraulic pump operate multiple cylinders?

Si, depending on:

• Pump oil capacity

• Flow rate

• Cylinder volume

• Required operating speed

A larger hydraulic system may require a higher-capacity pump.

5. How do I choose the right hydraulic pump?

Consider:

• Cylinder type (single acting or double acting)

• Required pressure

• Oil capacity

• Flow rate

• Power source (manual, eléctrico, aire, gasoline)

6. Why does a hydraulic cylinder stop moving?

Possible causes:

• Insufficient oil flow

• Closed valve

• Air in hydraulic system

• Overloaded cylinder

• Pump malfunction

7. How often should hydraulic oil be changed?

Oil replacement depends on usage conditions, but regular inspection and scheduled maintenance are recommended for industrial applications.

8. Can hydraulic pumps be used outdoors?

Si, but outdoor applications require:

• Proper weather protection

• Corrosion-resistant components

• Clean hydraulic oil

• Protection from dust and moisture

LONGLOOD Hydraulic Pump Solutions

LONGLOOD provides complete hydraulic solutions including:

• Manual hydraulic pumps

• Bombas hidráulicas eléctricas

• Air hydraulic pumps

• Gasoline engine hydraulic power units

• Cilindros hidráulicos

• Extractores hidráulicos

• Hydraulic torque wrench systems

Designed for industrial maintenance, construción, heavy lifting, and professional hydraulic applications.

How to Use a Hydraulic Pump with a Hydraulic Torque Wrench

A hydraulic torque wrench system consists of a bomba hidráulica, high-pressure hoses, and hydraulic torque wrench. The pump generates controlled hydraulic pressure, which drives the wrench to produce accurate and repeatable torque for tightening or loosening high-strength bolts.

LONGLOOD hydraulic torque wrench systems are widely used in industries such as wind power, aceite & gas, petroquímica, construción naval, centrais eléctricas, maquinaria pesada, and steel structures, where precise bolt tightening is critical.

Hydraulic Torque Wrench System Components

A complete hydraulic torque wrench system includes:

1. Chave dinamométrica hidráulica

   • Converts hydraulic pressure into rotational torque

   • Provides accurate bolt tightening force

2. Bomba hidráulica

   • Generates hydraulic pressure

   • Controls torque output through pressure adjustment

3. High-Pressure Hydraulic Hoses

   • Transfers hydraulic oil between pump and wrench

4. Manómetro

   • Displays hydraulic pressure

   • Allows accurate torque adjustment

5. Socket / Drive Accessories

   • Connects wrench to the bolt or nut

Step-by-Step Guide: Using Hydraulic Pump with Hydraulic Torque Wrench

Paso 1: Select the Correct Hydraulic Pump

Choose a pump according to the torque wrench requirements.

Consider:

• Required torque range

• Operating pressure

• Oil flow rate

• Number of wrenches used simultaneously

Most industrial hydraulic torque wrench systems operate at:

Maximum Pressure: 700 bar (10,000 psi)

Exemplo:

A 700 bar electric hydraulic torque wrench pump can provide stable pressure output for high-precision bolting applications.

Paso 2: Check Hydraulic Oil Level

Before operation:

• Check hydraulic oil level in the pump reservoir

• Ensure oil is clean

• Use recommended hydraulic oil

Insufficient or contaminated oil may cause:

• Reduced torque accuracy

• Pump overheating

• Internal component damage

Paso 3: Connect Hydraulic Hoses

Connect the pump and wrench using high-pressure hoses.

Connection procedure:

1. Turn off the hydraulic pump

2. Connect the supply hose to the wrench

3. Connect the return hose to the wrench

4. Tighten couplers securely

5. Install protective dust caps when not in use

Important:

• Never connect or disconnect hoses under pressure

• Ensure hoses are not twisted or damaged

• Use only hoses rated for 700 bar operation

Paso 4: Connect the Hydraulic Torque Wrench

Install the wrench onto the bolt.

Before operation:

• Select correct socket size

• Confirm wrench reaction arm position

• Ensure the reaction point is stable

• Check that the wrench is aligned correctly

The reaction arm must contact a solid surface to prevent movement during operation.

Paso 5: Adjust Hydraulic Pressure

Hydraulic pressure determines the torque output.

Procedemento:

1. Check the torque chart supplied with the wrench

2. Find the required torque value

3. Convert required torque into hydraulic pressure

4. Adjust the pump pressure regulator

5. Confirm pressure on the gauge

Exemplo:

If the torque chart indicates a specific pressure setting for a required torque value, adjust the pump until the gauge reaches that pressure.

Paso 6: Operate the Hydraulic Pump

Electric Hydraulic Pump Operation

1. Connect power supply

2. Turn on the pump

3. Select forward/retract mode

4. Pump sends hydraulic oil to the wrench

5. Wrench rotates and tightens the bolt

6. Release pressure after reaching the required torque

Manual Hydraulic Pump Operation

1. Close release valve

2. Operate pump handle

3. Monitor pressure gauge

4. Continue pumping until required pressure is reached

5. Release pressure after completing tightening

Paso 7: Tightening Procedure

Recommended tightening process:

1. Place torque wrench on the bolt

2. Position reaction arm securely

3. Increase hydraulic pressure slowly

4. Allow wrench to complete the tightening cycle

5. Release pressure

6. Repeat cycles if required

Para aplicacións críticas:

• Use cross-pattern tightening

• Follow specified bolt sequence

• Confirm final torque value

Paso 8: Release Pressure and Remove Equipment

After completing the operation:

1. Stop the hydraulic pump

2. Release hydraulic pressure completely

3. Confirm gauge reads zero

4. Disconnect hoses

5. Remove torque wrench

Never remove hoses while pressure remains inside the system.

Hydraulic Pump Selection for Torque Wrench

Tipo de bomba	Aplicación
Bomba hidráulica eléctrica	Factory maintenance, construction sites, industrial bolting
Air Hydraulic Pump	Explosion-risk areas, aceite & gas applications
Gasoline Hydraulic Power Unit	Outdoor heavy-duty applications
Manual Hydraulic Pump	Small torque applications and portable use

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LONGLOOD Electric Hydraulic Torque Wrench Pump Example

PEA4-9-220 Electric Torque Wrench Pump

Características:

• Compact and lightweight design

• High precision pressure adjustment

• Imported solenoid valve and piston components

• Stable torque control

• Suitable for repeated bolting operations

Especificacións técnicas:

Parameter	Value
Tensión	220V
Frecuencia	50Hz
Capacidade de aceite	6L
Poder	1.3 kW
Maximum Pressure	700 bar
Caudal baixo	8 l/min
Alto Caudal	1 l/min
Peso	30 kg

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Hydraulic Torque Wrench Safety Guidelines

✔ Always use a pump, mangueira, and wrench with matching pressure ratings
✔ Never exceed 700 bar maximum pressure
✔ Inspect hoses before every operation
✔ Keep hands away from reaction points
✔ Ensure the reaction arm is properly positioned
✔ Do not use damaged sockets or accessories
✔ Release pressure before disconnecting hoses
✔ Wear safety protection during operation

Frequently Asked Questions (FAQs)

1. Why does a hydraulic torque wrench need a hydraulic pump?

The hydraulic pump provides controlled pressure that powers the wrench. The pressure is converted into precise torque output for bolt tightening.

2. What pressure does a hydraulic torque wrench use?

Most industrial hydraulic torque wrench systems operate at:

700 bar (10,000 psi) maximum pressure.

3. Can one hydraulic pump operate multiple torque wrenches?

Si. Some hydraulic pumps can operate multiple wrenches simultaneously if the pump flow rate and oil capacity are sufficient.

4. How do I set the correct torque value?

The required torque is determined using the wrench manufacturer's torque-pressure conversion chart. Adjust the hydraulic pump pressure according to the required torque.

5. Can a hydraulic pump be used with different torque wrench brands?

Si, as long as:

• Operating pressure matches

• Hose connections are compatible

• Oil flow requirements are suitable

6. What is the difference between a normal hydraulic pump and a torque wrench pump?

A torque wrench pump is specially designed for:

• Precise pressure control

• Stable flow output

• Repeated tightening cycles

• Accurate torque application

7. Why is torque accuracy important?

Correct torque ensures:

• Proper bolt preload

• Joint safety

• Reduced risk of bolt failure

• Reliable equipment operation

8. What industries use hydraulic torque wrench systems?

Common applications include:

• Wind turbines

• Oil and gas pipelines

• Petrochemical equipment

• Power plants

• Construción naval

• Steel structures

• Heavy machinery

LONGLOOD Hydraulic Torque Wrench Solutions

LONGLOOD provides complete hydraulic bolting solutions including:

• Electric hydraulic torque wrench pumps

• Air-driven hydraulic pumps

• Gasoline hydraulic power units

• Hydraulic torque wrenches

• High-pressure hoses and accessories

Designed for accurate, seguro, and efficient industrial bolt tightening applications.

Request a Quote

Looking for a reliable Square Drive Hydraulic Torque Wrench Manufacturer in China?

Contact LONGLOOD for technical specifications, OEM solutions, and factory-direct pricing.

✓ Torque Range Up to 72,000 Nm
✓ Accuracy ±3%
✓ Aerospace Alloy Construction
✓ OEM & ODM Available
✓ Industrial Bolting Solutions Worldwide