Variable Volume Dispense Pumps

General Specifications

The following specifications apply to all Variable Volume Dispense Pumps, unless otherwise noted.

Cycle Life

Unless otherwise specified, the pumps will typically operate across a minimum of 10 million cycles on water, depending on application conditions.

Operating Pressure

The pumps are self-priming, so they have the capability of operating across a wide pressure range.

  • Maximum discharge pressure: Refer to individual pump tables for maximum discharge pressure.

Operating Temperature

Ambient operating temperature range is 40°F to 150°F (4°C to 66°C)

Storage Conditions

  • Temperature: -40°F to 175°F (-40°C to 80°C)
  • Relative humidity: 85% (max); non-condensing
  • Pumps should be stored completely wet or completely dried with nitrogen before prolonged periods of inactivity.

Operating Speed

  • Refer to the individual pump drawings for maximum operating speed and harmonic frequency.
  • The pumps may be operated in full-step, half-step or micro-step mode, depending on the electrical drive design and application parameters. Click here for more information.
  • Operating the pumps at higher speeds may affect dispense accuracy and life expectancy.

Electrical Characteristics

  • Pumps are equipped with a two-phase bipolar motor.
  • Home sensors provide an end of stroke (full discharge) indication; the sensor output will remain low when piston is fully extended.
  • Encoders are two channel, quadrature (no index pulse) designs.
  • Click here for more information on motor, sensor and encoder.
  • A drive electronics starter kit is available. Click here for more information.

Port Connections

  • All pumps require external valves for operation.
  • 1/4 - 28 Port: These ports are designed to be used with standard 1/4-28 flat bottom fittings.
  • Manifold Mount: Click here for additional information.

Mounting Information

Pumps should be mounted with the outlet port up (motor down) to optimize bubble purging.

  • 1/4 - 28 Port: The pumps should be mounted to a surface using #4 (2.5 mm) mounting screws.
  • Manifold Mount: Refer to pump mounting details for additional information. The pumps require M3-0.5 screws for mounting and the torque specification is 50 to 70 in-oz (0.353 to 0.494 N-m) maximum.