PI39-TS stainless steel pressure intensifier (topside version)



Water/Glycol pumps

Water pumps

Oil pumps


Topside use

Subsea applications


Relief valves

Thermal relief

Directional valves

Slide valves

Shutdown, lockout relay,

excess flow, flowline pilot


About us






Animated presentation

Designed to boost the pressure of any water-based or mineral/synthetic oil-based fluid.
Boosts inlet pressure up to 5 times without external power. The maximum outlet pressure is 900 bar.
When system pressure is achieved, there is minimal consumption of expensive hydraulic fluid.
External components manufactured from 316 (standard) no painting required for hostile environments.

The PI39-TS Intensifier amplifies the inlet pressure to a higher outlet pressure by a predetermined ratio.

Pressure in the high pressure line can become reduced as a result of a system leak or the use of the stored (pressure) energy. The PI39-TS restores and maintains that pressure in such instances. Check and changeover valves are integrated within the main body of the intensifier. When the inlet pressure x the ratio = the outlet pressure, then the PI39-TS is in a stalled condition and there is minimal consumption of fluid.

The maximum outlet pressure is 900 bar.

The PI39-TS does not contain a high pressure line vent valve.


The PI39-TS was designed principally for applications in the offshore oil and gas industry where the highest standards of product performance and durability are essential. The PI39-TS's external components are manufactured from 316 & 17/4 PH stainless steel to withstand hostile environments; it can operate on all water-based glycol fluids or on mineral and synthetic oils.



Manufactured from stainless steel with nitrile seals as standard.

Weight: 11 kgs.


Suitable for use with mineral/synthetic oils and all water-based fluids such as HW443 and Transaqua HT2, plus many others. The fluids used should be to a cleanliness standard of NAS 1638 class 6 or better.


The pressure intensifier can be mounted vertically or horizontally.

System temperature

The PI39-TS has been qualified to operate at temperatures from –10°C to +80°C (Ambient) at pressures up to a maximum of 900 bar.

Safety note

The inlet pressure of the intensifier should be carefully controlled, as the outlet pressure increases by the ratio of the intensifier in use. For example, if an 5:1 intensifier is being used, a rise in the inlet pressure of 100 bar will immediately increase the outlet pressure by 500 bar.

A relief valve set at the maximum pump rating should be fitted immediately downstream of the pump delivery port.

Options - No Vent Valve

Intensifier ratio Maximum Inlet pressure (bar) Maximum HP output pressure (bar) Inlet/Exh Port HP output port HP swept volume (cc) Part number
2:1 345 690 1/4 NPT Female 1/4" MP Female 19.5 PI39-02001-00-01-13-TS-NIT-0345
2.5:1 345 862 1/4 NPT Female 1/4" MP Female 15.6 PI39-02501-00-01-13-TS-NIT-0345
3:1 300 900 1/4" NPT Female 1/4" MP Female 13 PI39-03001-00-01-13-TS-NIT-0300
4:1 225 900 1/4" NPT Female 1/4" MP Female 9.75 PI39-04001-00-01-13-TS-NIT-0225
5:1 180 900 1/4" NPT Female 1/4" MP Female 7.8 PI39-05001-00-01-13-TS-NIT-0180

Part Numbering System

PI39 = Pressure Intensifier 73cc LP piston swept volume Model
  02001 = 2.00:1 Ratio
02501 = 2.50:1
04001 = 4.00:1
    00 = No vent Valve Vent Valve Option
    01 = 1/4" NPT Female Inlet and Exhaust
02 = 1/4" BSP Female
  Other options available on request
    01 = 1/4" NPT Female HP Outlet
02 = 1/4" BSP Female
13 = 1/4" MP Female
  Other options available on request
    TS = Topside Installation Target Location
    NIT = Nitrile seals -20°C to +80°C Vent Valve Option
VIT = Viton seals -10°C to +80°C
  Other options available on request
    0270 = 270 bar Maximum Working
Pressure LP Side
PI39 - 02001 - 00 - 01 - 01 - TS - NIT - 0420   Ordering Example

Dimensional Drawing

(c) Marshalsea Hydraulics Limited – a member of the Bifold Fluidpower group of companies.

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