SAH-High Pressure Process Pumps

SA-Process pumps
(Low & medium pressure)

SAH-Process pumps
(High pressure) 		Krytem-SAH / VSAH -
Low-temperature high-pressure pumps for process technology
Pressure production from the liquid phase has generally proved itself to be particularly economic for industrial gases in high-pressure processes. In most cases, the energy costs are significantly lower than the cost of compressing the gas phase. Furthermore reciprocating pumps facilitate high pressure application of high purity gases.

SAH pumps are used to provide reliable supplies of medium-to-high quantities of fluid for these types of processes even when the inlet conditions or tank connections are unfavourable. As is the case for SA series pumps, the suction valve is integrated in the piston head. The suction valve opens, helped by its own inertia, during the return stroke of the piston, and allows the fluid standing behind to flow freely into the cylinder. A high degree of admission is achieved for the cylinder even when conditions on the suction side are unfavourable. As a rule, low tanks and horizontal storage containers with low feeds can be emptied completely using Krytem SAH pumps.

SAH pumps are used for discharge pressures up to 500 bar and volumetric flows up to approx. 30 l/min in, for example, process and plastics technology. Their use in pressure gas bottling is also possible. The vacuum-insulated model (VSAH) is designed for media at temperatures below -80°C.

The 60 mm stroke DF-01 belt-transmission eccentric-drive unit is used as the drive. The whole pump unit including the pump head, eccentric drive, belt drive, electric motor, belt safety cover and accessories is mounted on a galvanised steel frame ready for connection.

SAH pumps are available with speed controllers with or without explosion-protection construction.


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Design features:

  • The suction valve integrated in the piston head provides for low cavitation even during unfavourable operating conditions.
  • Easily demountable suction valve.
  • Pressure valve can be dismantled without disassembling the pump head.
  • Structural separation of the pump head from the drive prevents any unacceptable contact between lubricant and discharge medium.
  • Shear-ring coupling between the pump head and the drive protects the pump against unacceptable mechanical loading.
  • The piston-rod seals are heated (vacuum-insulated types only) thus making it possible to stop without having to relieve the pressure and heating the suction side.
  • PTFE bellow acts as additional protection for the piston rods against contamination from the outside and moisture from the atmosphere.
  • Temperature-controlled warning system integrated in the pump head to protect against the unacceptable dispersion of cold due to leaks.
  • Supervision of flow by means of a flow monitor on the pressure side.
  • Pulsation damping on the pressure side.
  • Complete pump control set including automatic start routine (automatic valve control on suction side), stuffing box temperature control and dry running protection.