GTH Type Air Hoists
Product Description
GTH Type Air Hoists
Product Introduction:
The GTH Series Industrial Pneumatic Hoist is a high-performance lifting solution engineered for demanding industrial environments. Powered by compressed air, it delivers reliable and safe material handling without generating electrical sparks, making it an ideal choice for explosive or hazardous areas such as chemical plants, oil refineries, paint shops, and mining sites .
Working Principle of Pneumatic Hoist:
A pneumatic hoist uses compressed air as its power source to drive a pneumatic motor. The rotation is transmitted through a gearbox which increases torque, and then drives a sprocket to rotate the lifting chain, thereby completing the lifting operation. The hoist is mainly composed of a pneumatic motor, a planetary gear reducer, manual control valves, a main control valve, a suspension assembly, a braking mechanism, and a load chain. The pneumatic hoist can be combined with explosion-proof manual trolleys or pneumatic trolleys to form a mobile pneumatic lifting system. The lifting mechanism controls the main control valve to achieve lifting and lowering of loads, and the brake is engaged or disengaged to provide positioning and stopping during operation. The chain-type pneumatic hoist ensures safe lifting operations. The lifting mechanism can be used as a fixed unit, or installed underneath a traveling mechanism for mobile applications.
Features and Advantages of Pneumatic Hoist:
1. Intrinsically Safe and Explosion-Proof
Powered by compressed air and rated for 100% continuous duty cycle, the pneumatic hoist can operate continuously without the motor overheating. The operating air pressure keeps dust, dirt, moisture, and corrosive gases out of the housing. With no electrical hazards and no risk of electric shock in explosive environments, the use of pneumatic power is a clear advantage. The hoist operates without generating sparks, ensuring safe and explosion-proof performance.
2.Infinitely Variable Speed Control
The hoist provides infinitely variable speed regulation during both lifting and lowering operations. Its operating speed is three times faster than electric hoists and five to ten times faster than manual chain hoists.
3. Overload Protection and Air-Cutoff Protection
The system prevents accidental load drops in the event of a sudden interruption in the air supply. These features provide enhanced quality assurance and prevent damage to the product caused by excessive overloading.
4. Simple Operation
Lever control is straightforward and easy to operate. During lifting and lowering, the hoist responds quickly to handle movements, ensuring precise and responsive control.
5. Clean, Environmentally Friendly, and Reliable
The internal lubrication system eliminates air contamination. The hoist is well-suited for special or harsh working environments, including wet, humid, and high-dust conditions.
6. Effortless Handling and Compact Design
In addition to its attractive appearance, the pneumatic hoist features a more compact size and lighter weight compared to electric hoists, making it easy to transport. Its sturdy structural design ensures reliable operation with minimal maintenance requirements.
7. Low Failure Rate and Long Service Life
The pneumatic hoist is built to last, with a significantly extended service life compared to similar products on the market.
Technical Specifications:
| unit | GTH125-1 | GTH250-1 | GTH500-1 | GTH1T-2 | GTH2T-2 | GTH3T-3 | |||||||
| Air Pressure | Mpa | 0.4 | 0.63 | 0.4 | 0.63 | 0.4 | 0.63 | 0.4 | 0.63 | 0.4 | 0.6 | 0.4 | 0.63 |
| Capacity | KG | 125 | 250 | 500 | 1000 | 2000 | 3000 | ||||||
| Number of chains | PCS | 1 | 1 | 1 | 2 | 2 | 3 | ||||||
| Motor output power | KW | 0.6 | 1 | 0.6 | 1 | 0.6 | 1 | 0.6 | 1 | 0.6 | 1 | 0.6 | 1 |
| Lifting height | M | 2～20 (The standard height is 3 meters) | |||||||||||
| Full load lifting speed | m/min | 18 | 20 | 12 | 15 | 7 | 10 | 4 | 6 | 2.1 | 4.5 | 1.8 | 2.3 |
| Empty lifting speed | m/min | 30 | 35 | 25 | 30 | 17 | 20 | 7 | 9 | 5 | 5.5 | 4 | 5 |
| Full load descent speed | m/min | 27 | 36 | 13 | 15 | 16 | 17 | 10 | 11 | 5 | 6 | 5 | 6 |
| Full load gas consumption-increase | m3/min | 0.7 | 1.2 | 0.7 | 1.2 | 0.7 | 1.2 | 0.7 | 1.2 | 0.7 | 1.2 | 0.7 | 1.2 |
| Full load gas consumption-decrease | m3/min | 0.8 | 1.5 | 0.8 | 1.5 | 0.8 | 1.5 | 0.8 | 1.5 | 0.8 | 1.5 | 0.8 | 1.5 |
| Chain size | mm | 6.3*19 | 6.3*19 | 6.3*19 | 6.3*19 | 7*21 | 7*21 | ||||||
| Chain weight | kg/m | 0.9 | 0.9 | 0.9 | 0.9 | 1.0 | 1.0 | ||||||
| Standard weight (3 meters lifting height) | kg | 22 | 22 | 24 | 27 | 38 | 48 | ||||||
| Controller trachea length | m | 2～5 (The standard is 3 meters) | |||||||||||
| Full load noise-increased | dB | 73 | 77 | 74 | 78 | 75 | 78 | 77 | 80 | 80 | 82 | 80 | 82 |
| Full load noise-reduced | dB | 80 | 83 | 80 | 83 | 84 | 86 | 85 | 88 | 85 | 88 | 85 | 88 |
| Tracheal joint | in | 3/8NPT | 3/8NPT | 3/8NPT | 3/8NPT | 3/8NPT | 3/8NPT | ||||||
| Air tube size(inner diameter φ) | mm | 10 | 10 | 12 | 12 | 12 | 12 | ||||||
Pneumatic Hoist Outline Drawing 1:
| Type | Unit | GTH25-1 | GTH50-1 | GTH500-1 | GTH1T-1 | GTH2T-2 | GTH3T-3 |
| A | mm | 616 | 616 | 616 | 616 | 635 | 616 |
| B | mm | 310 | 310 | 310 | 310 | 315 | 310 |
| C | mm | 128.6 | 128.6 | 128.6 | 128.6 | 146 | 128.6 |
| D | mm | 181.4 | 181.4 | 181.4 | 181.4 | 185 | 181.4 |
| E | mm | 145.5 | 145.5 | 145.5 | 145.5 | 140 | 145.5 |
| F | mm | 258 | 258 | 258 | 258 | 150 | 258 |
| G | mm | 105.5 | 105.5 | 105.5 | 105.5 | 295 | 105.5 |
| J | mm | 55.5 | 55.5 | 55.5 | 55.5 | 65 | 55.5 |
| K | mm | 23.5 | 23.5 | 23.5 | 23.5 | 26 | 23.5 |
| H1 | mm | 460 | 460 | 460 | 460 | 500 | 460 |
| H2 | mm | 260 | 260 | 260 | 260 | 165 | 260 |
| φd | mm | 35 | 35 | 35 | 35 | 48 | 35 |
| N | mm | 32 | 32 | 32 | 32 | 33 | 32 |
Pneumatic Hoist Outline Drawing 2:
| Air Hoists | GTH125-1 GTH-250-1 GTH-500-1 GTH-1T-2 | GTH-2T-2 |
| Traveling Trolley | QDC-125 | QDC-2 |
| A | 315 | 325 |
| B | 111 | 125 |
| b. Track width range | 80-115 | 80-120 |
| bm | 168 | 168 |
| C | 205 | 218 |
| D | 90 | 110 |
| E | 240 | 240 |
| F | 71 | 71 |
| G | 120 | 120 |
| H. Minimum headroom | 550 | 565 |
| J | 50 | 93 |
| K | 23.5 | 26 |
| L | 128.6 | 146 |
| M | 180 | 185 |
| N | 89 | 33 |
| P | 174 | 140 |
| ø | 38 | 48 |
Pneumatic Hoist Structural Description:
A pneumatic hoist uses compressed air as its power source to drive a pneumatic motor into rotation. After passing through a transmission (reduction) gearbox that increases torque, the hoist completes the lifting operation. It is mainly composed of the following components: ① Pneumatic Motor, ② Manual Control Valve, ③ Main Control Valve, ④ Reducer (Gearbox), ⑤ Suspension Assembly, ⑥ Brake Mechanism, and ⑦ Limit Mechanism.
① Pneumatic Motor
Mainly consisting of a rotor, stator, front and rear end covers, blades, and bearings. When the air distribution plate of the main control valve directs compressed air into the motor, the blades rotate at high speed together with the rotor, generating torque.
② Manual Control Valve
Mainly consisting of a handle, valve body, and push buttons. Operating the push buttons opens the air ports to control the connection between the main control valve's air passages and the main air supply. This motor is a blade-type pneumatic motor with a built-in brake.
③ Main Control Valve
Mainly consisting of left and right valve stems, connecting rods, and an air distribution plate. Air distribution for forward and reverse rotation of the pneumatic motor is achieved through switching between the left and right air passages.
④ Reducer (Gearbox)
Mainly consisting of a housing and a set of planetary gear reduction mechanisms. After the high-speed input shaft from the pneumatic motor drives into the reduction mechanism, the speed is reduced and torque is increased, with the final stage outputting power to the lifting sprocket.
⑤ Suspension Assembly
Mainly consisting of an upper hook, suspension body, sprocket, load chain, lower hook, and other parts. The lifting and lowering motions are accomplished through the forward and reverse rotation of the sprocket.
⑥ Brake Mechanism
Mainly consisting of a brake cone, brake ring, and cylinder body. Compressed air is directed from the main control valve into the cylinder to separate the brake cone and brake ring, thereby releasing the brake.
⑦ Limit Mechanism
Mainly consisting of a rotating shaft, swing frame, and return spring. When the hoist reaches the upper or lower travel limit, this mechanism provides impact protection to prevent over-travel.
Application Scope of Pneumatic Hoist:
Owing to its excellent explosion-proof performance, the pneumatic hoist is widely used in industrialized countries across a broad range of applications, including chemical plants, textile mills, paint/spray shops, logistics operations, and port facilities — particularly in environments with flammable, explosive, high-temperature, high-dust, or highly corrosive conditions. Thanks to its high-frequency operation capability and infinitely variable speed control, it is also highly favored by industries with high production volumes and continuous workflow requirements, such as automotive manufacturing, tractor production, electric motor assembly, refrigerator manufacturing, and logistics. In many industrialized nations, regulations explicitly mandate the use of pneumatic hoists in explosive or hazardous environments including petroleum, chemical, automotive, and mining industries.