Liquid metering pumps are commonly used to continuously introduce liquids into a reactor or vessel at elevated pressures. A wide variety of pumps are available to meet various pressure, flow, and control requirements.
Many common pressure and flow requirements associated with Parr reactors and pressure vessels can be handled with high pressure positive displacement pumps such as those in the table below. Special pumps can be furnished to meet requirements outside the range of these pumps. Pumps may be operated from their faceplates or configured to be remotely controlled (setpoint/start/stop) or automated with a Parr controller, such as the Model 4871 Process Controller. Liquid feed lines typically include an inlet filter, reverse-flow check valve, and outlet tubing to the reactor.
Optionally a Coriolis mass flow meter can be provided in series with the pump to verify the actual mass flow rate (low viscosity fluids only). Alternatively, a liquid feed supply vessel on a scale or balance can be included to verify the mass of liquid delivered as a function of time.
For higher viscosity liquids or fluids containing some solids, a diaphragm pump or high-pressure syringe pump may be appropriate. Alternatively, gear pumps can be furnished for high viscosity liquids, although independent flow rate measurement or calibration confirmation may be required for gear pumps. Syringe pumps may also be appropriate for applications requiring very low (<0.01 mL/min) pulseless flow rates, or where high precision liquid delivery is required.
A stirred or non-stirred feed vessel can also be provided. Parr feed vessels can optionally include a heater or welded jacket which can be used to decrease the viscosity of the liquid being pumped. Overhead nitrogen at a controlled pressure can also be provided with any Parr-provided liquid feed vessel, useful for increasing the net positive suction head in the pump suction line to above the required value (i.e. for liquids with a high vapor pressure at the pumping temperature.)
Liquid Metering Pumps | |||
Flow Rate, mL/min | Pressure, Max. psi | Viscosity, Max. cP | Max. Temperature (°C) |
0.010-4.000 | 5800 | 100 | 60 (optional 120) |
0.10-20.00 | 2900 | 100 | 60 (optional 120) |
1.0-40.0 | 5800 | 1000 | 60 |
2.5-100.0 | 2900 | 1000 | 60 |
10.0-400.0 | 1000 | 1000 | 60 |
Accessories
4878 Automated Liquid Sampler
Catalyst Addition Devices
Catalyst Baskets
Catalyst Loading Toolkit
Catalyst Testing System
Condensers
Coned Pressure Fittings
Continuous Bulk-Solids Feeder
Controllers
Cooling Coils
Equipment for Use in Potentially Ignitable Atmospheres
External Valves and Fittings
Gas Measurement Systems
--Intermediate Supply Tanks
--Mass Flow
--High Pressure Gas Burettes
Heaters
Insulated Electrical Glands
Liners
Liquids Charging Systems
--Liquid Metering Pumps
--Liquid Charging Pipettes
Magnetic Drives
Motors and Drives
Pressure Gages
Pressure Hose
Safety Rupture Discs
Sample Collection Vessel
Service Fixtures
Solids/Slurry Addition Devices
Spare Parts Kits
Split-Ring Closures
--Stirrer Options
--Gas Entrainment Impellers
Temperature Limits
Thermocouples
Valves and Fittings
--Bottom Drain Valves
--Manual Control Valves for Compressed Gas Tanks
--Pressure Relief Valves
--Safety Check Valves
Windows