Model 4B-14 Liquid Pump

0.75HP Liquid Pump

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Haskel Model 4B-14 0.75HP Air-Driven Liquid Pump

Catalog literature: Liquid Pump Catalog.pdf Acrobat DC

With a nominal pressure ratio of 14:1, the Haskel model 4B-14 0.75HP air-driven liquid pump utilizes a single air head to boost liquid pressures to a maximum of 1500 PSIG.

Features & Benefits:

  • Safe pneumatic operation – no heat, flame or spark risk
  • Infinitely variable cycling speed
  • Stall at pre-determined pressure to hold that pressure without consuming power
  • Problem-free stop/start applications
  • Easily automated – many modification and control options
  • Suitable for most liquids and liquefied gases
  • Alternative gas drive options available, such as sour gas, natural gas, boil off gases, or nitrogen
  • Robust, reliable, compact and easy to maintain proven design
  • No need for air line lubrication – saves costs and prevents contamination
  • Unbalanced cycling spool provides immediate response to pressure changes
  • Can be manufactured to meet ATEX, CE and NACE

Technical Data:

  • Power: 0.75HP
  • Air Head: single
  • Max Air Pressure: 100 PSIG
  • Max cycles: 225/min.
  • Nominal ratio (“dash number”): 14:1
  • Actual area ratio: 16:1
  • Max outlet pressure (continuous): 1500 PSIG
  • Max outlet pressure (intermittent): 1500 PSIG
  • Displacement / cycle: 0.90 cu. in.
  • Max flow: 428 cu. in./min.

Typical Performance Characteristics (@100 PSIG air supply pressure):

  • 400 in3/min @ 700 psig
  • 61 in3/min @ 1450 psig

Materials of Construction:

  • Pump section: Aluminum
  • Plunger: Aluminum (hard coated)
  • Non-metallics: UHMWPE, Buna


  • Service Code 1: Petroleum-based oils, kerosene, ethylene glycol, water with 5% soluble oil.
  • Service Code 2: Plain water, diesel fuel
  • Service Code 3: N/R
  • Service Code 4: N/R
  • Service Code 5: N/R
  • Service Code 6: N/R


Repair kit information:

  • Fluid section seal kit P/N: 57341
  • Air drive seal kit P/N: 57340
  • Optional tools: 28584 (Sleeve Removal Tool)
  • Notes: Use Air Drive Seal Kit 57340 for units purchased after July 2001. For resealing the air cycling valve only, 55725 Seal Kit, can be ordered.
  • Installation documents: SKIS-001