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Internal Gear Pumps (Double Pump/Tandem Pump)
  • Internal Gear Pumps (Double Pump/Tandem Pump)
  • Internal Gear Pumps (Double Pump/Tandem Pump)
  • Internal Gear Pumps (Double Pump/Tandem Pump)

HL Series Internal Gear Pumps
(Double Pump/Tandem Pump)

The double pump (tandem pump) consists of two single pumps assembled in series. It features a common inlet port and two outlet ports that can supply two independent circuits. Various displacements can be achieved by combining different pump series.

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  • HL10 (10R) Double Gear Pumps
  • HL10 (10R) Double Gear Pumps
HL10 (10R): Technical Specifications (unit: mm)
Pump model A1 A2 Rear pump size
13 16 20
A3 A4 A3 A4 A3 A4
HL10-25-※-P-10R 73 164.5 165.8 297 168.5 302.5 172.5 310.5
HL10-32-※-P-10R 76.5 171.5 169.3 304 172 309.5 176 317.5
HL10-40-※-P-10R 80 178.5 172.8 311 175.5 316.5 179.5 324.5
HL10-50-※-P-10R 85 188.5 177.8 321 180.5 326.5 184.5 334.5
HL10-63-※-P-10R 92 202.5 184.8 335 187.5 340.5 191.5 348.5
  • HL10 (20R) Double Gear Pumps
  • HL10 (20R) Double Gear Pumps
HL10 (20R): Technical Specifications (unit: mm)
Pump model A1 A2 Rear pump size
3.5 05 6.3 08 10
A3 A4 A3 A4 A3 A4 A3 A4 A3 A4
HL10-25-※-P-20R 73 164.5 159 281 161 285 162.5 288 164.8 292.5 167.3 297.5
HL10-32-※-P-20R 76.5 171.5 162.5 288 164.5 292 166 295 168.3 299.5 170.8 304.5
HL10-40-※-P-20R 80 178.5 166 295 168 299 169.5 302 171.8 306.5 174.3 311.5
HL10-50-※-P-20R 85 188.5 171 305 173 309 174.5 312 176.8 316.5 179.3 321.5
HL10-63-※-P-20R 92 202.5 178 319 180 323 181.5 326 183.8 330.5 186.3 335.5
  • HL11 Double Gear Pumps
  • HL11 Double Gear Pumps
HL11: Technical Specifications (unit: mm)
Pump model A1 A2 Rear pump size
25 32 40 50 63
A3 A4 A3 A4 A3 A4 A3 A4 A3 A4
HL11-25-※-P-10R 73 168 175 314                
HL11-32-※-P-10R 76.5 175 178.5 321 182 328            
HL11-40-※-P-10R 80 182 182 328 185.5 335 189 342        
HL11-50-※-P-10R 85 192 187 338 190.5 345 194 352 199 362    
HL11-63-※-P-10R 92 206 194 352 197.5 359 201 366 206 376 213 390
  • HL21 Double Gear Pumps
  • HL21 Double Gear Pumps
HL21: Technical Specifications (unit: mm)
Pump model A1 A2 Rear pump size
25 32 40 50 63
A3 A4 A3 A4 A3 A4 A3 A4 A3 A4
HL21-80-※-P-10R 109.5 249.5 241.5 417 245 424 248.5 431 253.5 441 260.5 455
HL21-100-※-P-10R 114 258.5 246 426 249.5 433 253 440 258 450 265 464
HL21-125-※-P-10R 120 270.5 252 438 255.5 445 259 452 264 462 271 476
HL21-160-※-P-10R 129 288.5 261 456 264.5 463 268 470 273 480 280 494
  • HL22 Double Gear Pumps
  • HL22 Double Gear Pumps
HL22: Technical Specifications (unit: mm)
Pump model A1 A2 Rear pump size
80 100 125 160
A3 A4 A3 A4 A3 A4 A3 A4
HL22-80-※-P-10R 109.5 249.5 270 474
HL22-100-※-P-10R 114 258.5 274.5 483 279 492
HL22-125-※-P-10R 120 270.5 280.5 495 285 504 291 516
HL22-160-※-P-10R 129 288.5 289.5 513 294 522 300 534 309 552
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Hydraulic Components Applications
Hydraulic Components Applications

Regularly flush the system to remove dirt and deposits. Periodically check the cleanliness and viscosity of the lubricant to ensure the lubrication system functions correctly. During daily use, pay attention to any abnormal vibrations and noises. Maintain the gear pump's transmission components and inspect and adjust the safety valve. During gear pump operation, regularly monitor the gear pump's working parameters, including flow, pressure, and temperature.

nternal gear pumps offer numerous advantages, making them a preferred choice in many industries. Key advantages include: high efficiency, self-priming capability, robust structure, wide viscosity range, quiet operation, precise flow control, and low maintenance.

Due to their unique characteristics and advantages, internal gear pumps are widely used across various industries. Common applications include: chemical processing, food and beverage, pharmaceuticals, oil and gas, and pulp and paper.