Reciprocating cryogenic pumps LDPD

This model of pumps are designed for processes back up or liquid carbon dioxide removal under pressure of up to 200 bar.

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Peculiarities of LDPD cryogenic pumps:

  1. The cold end is slanted upwards by 10 o, to assist degassing of the pump cylinder and preventing accumulation of gas in the suction chamber prior to start-up and during operation.
  2. Due to the excellent vacuum insulation, the lowest temperature is kept in the pump body, and the liquid is available for an instant re-start (without venting).
  3. The suction chamber is designed to separate any flash gas from the incoming liquid, assuring an homogeneous flow of cold liquid into the cylinder.
  4. The straight inflow suction valve provides the best possible low resistance flow characteristic, ensuring a low NPSH requirement. (large diameter of the inflow suction valve).
  5. The thin "hat" seal rings remain flexible even at extreme low temperatures.
  6. The cold end is screwed on an open intermediate piece for low thermal conductivity.
  7. Both the crank drive and the intermediate part have connections for an optional nitrogen purge.  
  8. Thermosiphon tank suction valve execution (option), allowing a shorter cool down period as well as reduced losses.
  9. Piston head made of bronze allowing a safer operation.
Applications cylinder (up to 120 bar) and buffer tank filling
Liquids pumped oxygen, nitrogen, argon, carbon dioxide, liquefied natural gas (LNG), nitrous oxide
Drive type grease lubricated crank drive
Design pressure LDPD 50/40, 50/50: up to 200 bar LDPD 65/40, 65/50: up to 120 bar LDPD 80/40, 80/50: up to 80 bar
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