• Reliable, precise flow rate control with reciprocating piston design.

  • High pressure capabilities.

  • Corrosion resistant materials.

Reproducible Metering

Precise metering at high pressure is attained by a positive displacement, reciprocating piston assembly. The piston is driven by a constant speed motor via a specially contoured cam. The cam profile is designed so the piston rapidly intakes and delivers a smooth, constant volume of fluid to the end of the piston stroke. Thus, motor efficiency is maximized and pulsation minimized.

Reproducible metering is attained by precise control of the piston's stroke length and rapid response check valves. The piston's stroke length is fixed by a precision micrometer which is simple to use and assures reproducible metering. The inlet and outlet check valves regulate flow direction.

The piston assembly is uniquely designed to permit an even application of the force driving the piston - a detail which helps to insure exact, reliable liquid transfer and extended seal life.

 

precision micrometer

heads

Corrosion Resistant

The materials in the liquid end of Eldex pumps are carefully chosen for corrosion resistance. The piston is sapphire, and the inlet and outlet valves incorporate sapphire seats and ruby balls.

The standard piston seal material is an ultra-high molecular weight polyethylene with excellent chemical compatibility characteristics. For specialized applications a graphite fiber reinforced PTFE may be substituted.

The liquid end housing is made of type 316 stainless steel because of its superior resistance to corrosion.

The liquid end housing is made of type 316 stainless steel because of its superior resistance to corrosion.

Reliable Design

The compact pump housing, unique piston assembly and many other features demonstrate our dedication to building precision metering pumps made to last. We know they last because users all over the world tell us time and again that their Eldex pumps are still performing after years of continuous use.

 

Choose a model meeting your requirements:

All ReciPro liquid metering pumps operate most efficiently in the upper range of their flow rate capacity, so it is always a good idea to choose a model you will use as close as possible to its maximum flow rate capability.

Model A

Single piston pumps with flow rates ranging between 0.02 to 6.0 mL/min., and pressures to 5000 psi. Pump models available in type 316 stainless steel, CTFE, and PEEK.

Model B

Single piston pumps with flow rates ranging between 0.2 to 32 mL/min., and pressures to 5000 psi. Pump models available in type 316 stainless steel, CTFE, and PEEK.

Model AA

Dual piston pumps with flow rates ranging between 0.2 to 10 mL/min., and pressures to 5000 psi. Pump models available in type 316 stainless steel, CTFE, and PEEK.

Model BBB

Triple piston pump with flow rate range between 1.0 to 100 mL/min., and pressures to 5000 psi. Pump models available in type 316 stainless steel.

Model B EXP

Single piston pumps with flow rates ranging between 0.2 to 23 mL/min., and pressures to 5000 psi. Pump models available in type 316 stainless steel. Motor used is rated for Class I Group D requirements.