The product
The Cryogenic Vertical Reciprocating Pump P2K, by Nikkiso ACD, serves heavy duty cylinder filling and medium duty storage filling. It pumps nitrogen, oxygen, argon, CO2, nitrous oxide, methane and ethylene, with a maximum discharge pressure of up to 6,000 psi (414 bar).
How the Cryogenic Vertical Reciprocating Pump P2K works
The P2K has a vertical pump design. As a result, it eliminates gravitational loading on the piston, which extends sealing ring life and provides smoother suction valve operation.
The vertical cold end is also submerged inside a vacuum-jacketed liquid sump. Therefore, the pump minimizes heat leak and increases system efficiency, particularly in poor suction conditions.
An electric motor with belt drive powers the grease-lubricated drive assembly. In addition, the motor sits on the backside of the pumping skid. This way, it eliminates possible fire, explosion or hazard in the event of a liquid oxygen leak.
Applications
- Heavy duty cylinder filling
- Medium duty storage filling
- Unattended, automatic storage filling
Liquids pumped: nitrogen (N2), oxygen (O2), argon (Ar), CO2, nitrous oxide (N2O), methane and ethylene.
Features and Benefits
- Vertical installation offers less vibration, reduced noise and a compact system footprint
- V-band clamp secures the sump to the intermediate, allowing quick and easy access to the cold end assembly
- External re-lubrication nipples for roller bearings and crosshead provide extended service life
- Replaceable crosshead wearband eliminates crosshead piston wear and reduces maintenance costs
- Packing rings at the top of the pushrod are retained in cartridges for easy replacement, with no removal of sump and cold end required
- Easy cold end maintenance by swiveling the pump and drive end 45°
- Pump assembly and spare parts are interchangeable with the PD3000 pump
Typical Scope of Supply
- Grease-lubricated drive assembly and vacuum-jacketed cold end
- Electric motor with belt drive and guard
- Hot-dipped galvanized steel skid frame
- Over pressure switch gauge (shipped loose)
- Control panel with combination motor starter and running time meter (shipped loose), relay logic
- Vent line with manual valve and low pressure relief valve
- Monel suction strainer
- High pressure relief valve with discharge line and surge chamber
Nitrous Oxide Service
Liquid nitrous oxide is a potentially dangerous fluid and must be handled with extreme care. See Compressed Gas Association standard CGA G-8.3-2016 for further information.
Under certain combinations of temperature and pressure, nitrous oxide can explosively decompose with serious consequences. In addition, nitrous oxide is an oxidizer that actively supports combustion. For this reason, nitrous oxide handling equipment must be cleaned for oxygen service.
Design and construction of storage and piping systems for pumping liquid nitrous oxide must assure material compatibility and prevent loss of prime or dry running of pumps. Nitrous oxide is also an active solvent for many materials, so material compatibility must be confirmed before use. For additional historical information on hazards associated with nitrous oxide decomposition, refer to Chemical Safety Board report number 2016-04-I-FL, dated February 2017.
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