Additel 959 Hydraulic Ultra-High Pressure Test Pump




Product Description

Additel 959 Hydraulic Ultra-High Pressure Test Pump
Oil : 0 psi to 40,000 psi

  • Pressurize large-volume workload
  • Generate pressure to 40,000 psi (2,800 bar) pressure
  • Increase and decrease pressure smoothly
  • Three pressure ports

The new Additel 959 Hydraulic Pressure Test Pump is a benchtop pressure pump designed to generate pressure to 40,000 psi (2,800 bar). This pump incorporates a dual-piston system which is ideal for filling large volume workload with the hand pump and providing smooth increase and decrease of pressure with the high pressure, fine adjust screw press. The 959 test pump incorporates an isolation valve which isolates the calibration volume from the check valve associated with the hand pump. Because the check valve can often be a source of leaks and maintenance, the isolation valve provides more stable measurements and reduces potential maintenance of the pump. The Additel 959 is an ideal comparison test pump for calibrating pressure measuring instruments such as test gauges, indicators or transducers. 


  • Generate Ultra-high Pressure
    Generate pressure up to 40,000 psi (2,800 bar)
  • Durable and Minimal Maintenance
    Patented screw press technology, without non-returning valve inside that is usually used on troublesome hand pumps.
  • Hand pump to fill large volume systems
  • Easy-to-use
    With the patented screw press technology, high pressures can be generated easily, as well as increased and decreased smoothly.


The Additel 959 is designed to generate pressure up to 40,000 psi (2,800 bar) for the application requiring accurate pressure testing and calibration. It can be used in calibrating pressure gauges, transmitters, or other pressure measuring instruments.


  • Media
  • Pressure Range
    0 to 40,000psi (2,800bar) gauge pressure.
  • Reservoir capacity
    420ml (25.6 in^3)
  • Material
    Ram/adapters :  SS
    Body : SS, aluminum, copper
    Seals : Buna-N, PTFE, Copper Alloy, Aluminum Alloy
  • Connection
    Test Gauge Connection : Positional Autoclave F-250-C, 9/16″ – 18 UNF female
    Reference Gauge Connection : Positional Autoclave F-250-C, 9/16″ – 18 UNF female
    1/2BSP female and M20X1.5 female connections are available upon request.
  • Dimensions
    Height : 6.9″ (175 mm)
    Base : 17.9″ (455 mm) x 15.0″ (380 mm)
  • Weight
    28.7 lb (13 kg).
  • Warranty
    1 year
  • Piston volume
    Fine adjust piston : 1.5 ml (0.09 in^3)

Order Info

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About us

บริษัท เมสเชอร์เมนท์เอเชีย จำกัด
Measurementasia Co.,Ltd.

99 Moo. 3, Khlong 5, Khlong Luang,
Pathumthani 12120



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