• UNx Fluid End 4215HF-Fluid-End 4240-Section

3640 UNx Fluid End - #8 Plungers

Part No: 53550

Convert an existing Jetstream 3600 UNx® Pump to higher flow or operating pressure in just minutes. Flow up to 10.8 gpm (41 l/min) at up to 27,000 psi (1850 bar).

The UNx Fluid End is a cost-effective solution to increase the available operating pressure or range of pressures of an existing Jetstream 3600 UNx Pump. These fluid end models deliver all of the benefits that define UNx Fluid Ends as the best in the industry.

  • Superior performance
  • Greater flexibility in the field
  • Reduced downtime and maintenance
Model Name 3640
Maximum Power (hp) 188
Maximum Operating Pressure (psi) 27000
Maximum Flow (gpm) 10.8
Minimum Flow (gpm) 3
Maximum Power (kW) 140
Maximum Operating Pressure (bar) 1850
Maximum Flow (l/min) 41
Minimum Flow (l/min) 11
Plunger Size #8
Plunger Diameter (in) 0.73
Plunger Diameter (mm) 18.54
Number of Plungers 3
Plunger Stroke (in) 3.6
Plunger Stroke (mm) 92
Discharge Port Connection 40K Pump Discharge Female
Accessory Port Connections Jetstream 40K Port Female
Number of Accessory Ports 3
Suction Port Connection 1"NPT Female
Minimum Pump Speed (RPM) 150
Maximum Pump Speed (RPM) 550
Flow at 150 RPM (gpm) 2.9
Flow at 200 RPM (gpm) 3.9
Flow at 300 RPM (gpm) 5.9
Flow at 400 RPM (gpm) 7.8
Flow at 500 RPM (gpm) 9.8
Flow at 550 RPM (gpm) 10.8
Flow per Revolution (gal/rev) 0.0196
Flow at 150 RPM (l/min) 11
Flow at 200 RPM (l/min) 15
Flow at 300 RPM (l/min) 22
Flow at 400 RPM (l/min) 30
Flow at 500 RPM (l/min) 37
Flow at 550 RPM (l/min) 41
Flow per Revolution (l/rev) 0.074
Power End Model 3600

UNx Conversion Video

This video highlights the ease of maintenance and pressure convertibility of Jetstream UNx Pump. (3:59)

40K Bypass Valve - Pump Mount

A bypass valve diverts a portion of pump flow to a low- pressure outlet and is used to prevent bogging of diesel engines when using flows at the low end of the pump’s capability or to adjust pressure on electric motor driven systems.  40,000 psi (2750 bar).  Pump-mounted.

40K Handle-Adjustable Regulator

Maintains constant system pressure when operating one or more shut-in devices. Knob-adjustable. Field-replaceable valve cartridge. For operation at 20,000 - 40,000 psi (1400 - 2750 bar). Pump-mounted.

UNx Spare Parts Packages

Packages include all major fluid end replacement packaged together for easy transport and storage.

4200 UNx Bareshaft Pumps

4200 UNx triplex pumps can handle input power up to 325 hp (242 kW). Output from 63 gpm at 8,000 psi (238 l/min at 550 bar) to 11.9 gpm at 40,000 psi (45 l/min at 2750 bar).

4200 UNx Fluid Ends

Increase the range of available operating pressures for any Jetstream 4200 UNx Pump with additional fluid ends. Conversions take only minutes and are available for pressures up to 40,000 psi (2750 bar).