TLC / TLA -
High Pressure Pumps
For Cylinder Filling
TL pumps are mainly used for high-pressure cylinder filling. A wide range of pump capacities is available corresponding to the usual filling pressures of 150, 200 and 300 bar and the most frequently required flow rates. Models for ultimate pressures up to 700 bar are available in the standard range. The non-insulated TLA models are intended for media such as CO2 or N2O with transfer temperatures above -80°C; TLC pumps with fully effective vacuum insulation are used at low temperatures.
The inlet valve of TL pumps is located centrally in the direction of flow in front of the piston.
The valve opens after the push stroke allowing the fluid behind it to flow into the cylinder. Due to minimised inertial and reset forces on the pump components only slight pressure differences occur when the medium flows into the cylinder. Thus cavitation is reduced to a minimum. The transfer medium, heated by the absorption of frictional energy inside the pump, is circulated back to the tank via the gas return located at the back. The extremely robust and wear-resistant design of the pressure valves makes for low maintenance costs and high operational reliability.
In the standard pattern, TL pumps are equipped with 45 or 60 mm stroke Type F-01 and DF-01 belt-transmission eccentric-drive units and are mounted, with the accessories, ready for connection, on a galvanised steel frame. The design, consisting of two or three headed pumps coupled to DF-02 or DF-03 drive units, makes it possible to pump large flow volumes even in the face of high ultimate pressures. The 30 mm stroke type GH integrated transmission unit can be used for smaller flow rates and/or reduced ultimate pressures.
TL pumps are available with dual speed motors or speed controllers, with or without explosion-protection construction for flammable or explosive discharge media; TLC pumps for oxygen available with medium-wetted parts made from Monel and oxygen-compatible gear lubricant.
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Design features:
- 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;
- Monel cold-end version and oxygen-compatible lubrication available;
- complete control set including automatic start routine (automatic valve control on suction side), stuffing box temperature control and dry running protection available.
