Valveless operating plunger metering pump with rotary control piston. It works by the combined oscillating and rotating movement of the piston. Thus the displacer itself opens and closes discharge and suction. Valves are not required. The pump can be operated through a very wide range of stroke frequencies.

This principle enables the exact metering of highly viscous liquids which also might contain - even large - solids.

The pump head is fabricated from stainless steel. Piston and liner are treated by a special wear-resistant coating. Depending on the application the pump head also is available from other high performance materials.

The clearance between piston and liner which mainly seals the pump is adapted to the viscosity of the liquid.

The lantern on the rear head end serves to drain the leakage or can be used as an area to flush, lubricate or seal the pump with suitable media.

The lantern is sealed by elastomer lip rings. The flow direction is selectable by the assembly position of the piston. By turning the head around its horizontal axis an effect of re-suction is adjustable.

Valveless plunger metering pump DR 150/70

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• Valveless
• Viscosities up to 10° mPas
• Pressure up to 630 bar
• Temperature range -40°C to +400°C
• Accuracy ±0.5%
• Wide range of stroke frequency

• Piston and liner from ceramics or hard metal
• Pump head with heating or cooling jacket
• Sealless with metallically sealed lantern
• Other options on request

For additional information, call
HOPKINS TECHNICAL PRODUCTS, INC.
1-800-732-6704