SA-Process Pumps

SA-Process pumps
(low & medium pressure)

SAH-Process pumps
(high pressure) 		Krytem SA / VSA -
Low- And Medium-Pressure Pumps
Krytem SA pumps are used for discharge pressures up to 100 bar and volumetric flows up to approx. 90 l/min. Typical applications are the transfer of cryogenic media in the face of higher discharge pressures and process supply in the chemical industry and process technology. The vacuum-insulated version (VSA) is designed for media at temperatures below -80°C.

SA pumps require an extremely low NPSH setting to ensure reliable delivery. The suction valve of SA pumps is integrated in the piston head. The inertial forces of the valve body and slip stream of the fluid are utilised with particular effect as follows: the suction valve is forced open during the return stroke of the piston, thus opening the way for the fluid standing behind it to flow into the cylinder. This design damps the cavitation effects and gives the cylinder a high degree of admission even under unfavourable conditions on the suction side. Both low level and horizontal tanks with low feeds can usually be completely emptied by Krytem SA pumps.

Different drive units are available according to application, flow rate and pressure range. Apart from the 45 and 60 mm stroke F-01 and DF-01 belttransmission eccentric drive units, 30 mm stroke K and L (type K adjustable from 0 to 30 mm) eccentric-drive units with integrated transmission gear and directly flanged-on electric motor are used with these pumps.

SA pumps for larger discharge rates with a belt-transmission eccentric drive are mounted together with accessories on a galvanised steel frame ready for connection. All SA pumps are available with speed controllers with or without explosion-protection construction.


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Design features:

  • low NPSH req. / low cavitation susceptibility even during unfavourable operating conditions due to suction valve integrated in the piston head;
  • structural separation of the pump head from the drive preventing any unacceptable contact between lubricant and discharge medium;
  • shear-ring coupling between pump head and drive protecting pump against unacceptable mechanical loading;
  • piston-rod seals heated thus making it possible to stop without pressure relief or suction side warm-up;
  • PTFE bellow acting as additional protection for the piston rod against ice formation due to atmospheric moisture;
  • temperature-controlled warning system integrated in the pump head for protection against unacceptable dispersion of cold due to leaks;
  • supervision of flow by means of a flow monitor on the pressure side;
  • pulsation damper reducing vibrations due to pressure pulsation;
  • complete control set including automatic start routine (automatic valve control on suction side), stuffing box temperature control and dry running protection available.