P Series Pressure Comparator (System D)

Brand: Crystal Pressure

Our high-pressure, hydraulic pressure comparators are portable, self-contained, hydraulic pressure generators for calibrating pressure gauges, transmitters, sensors, and safety valves.

They are much faster than deadweight testers and most automated pressure controllers; and it’s so quick and easy to use, it’s ideal for calibrating those low cost gauges that are often overlooked for ISO9000 compliance.

Each pump is available on its own, or in one of our complete ready-to-use pump systems.

The P-Series (System D) comparators are hydraulic screw pumps designed for easy, controlled, high pressure generation.

Each comparator includes a 4 connection manifold, which can be used for the reference indicator, the device under test, a fine adjust, an isolation valve, or a fluid reservoir.

The adjustable reference pressure port lets you set your reference gauge at the best viewing angle. Three models are available for hydraulic oil, water, or both.
  • Pressure Range: 0 to 5000 psi / 350 bar
  • Easy to use fine adjust
  • Adjustable reference port
  • Eliminate / Bleed air with CPF fittings
  • Portable or permanent bench mounting
  • P-018-CPF  includes CPF fittings


Pressure Ranges

  • P016, P017, and P-018-CPF: 0 to 350 bar/0 to 5000 psi

O-Ring Material

  • P016, P017, and P-018-CPF: Buna-N

Pressure Connections - Reference Ports

  • P016, P017: 1/4" BSP Female
  • P-018-CPF: Crystal CPF Male (1/4" BSP Female to CPF Male Adapter)

Pressure Connections - Adapter/Accessory Ports

  • P016, P017: 3 × 1/4" BSP Female
  • P-018-CPF: 2 × 1/4" BSP Female. Includes one MPM-1/4BSPM and one MPF-1/4FPT (1/4" Female NPT)


  • Pump: 366 × 195 × 105 mm/14.4 × 7.7 × 4.1 inch
  • Weight: 3.7 kg/8.2 Lbs
  • Mounting Holes: M6×4 places

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