The Model 1730 metering pump is a hydraulically actuated
tubular diaphragm design, utilizing a pre-stressed diaphragm
and vertical plunger configuration.
The memory of the pre-stressed diaphragm returns to
its exact reference position on every suction stroke
giving the pump exceptional accuracy, outstanding lift
capabilities and minimal NPSH requirements. The ability
of the diaphragm to withstand higher vacuum prevents
premature diaphragm failure. The unique hydraulic system
provides the industry with the simplest and most reliable
actuated design for metering pumps.
The Model 1730 is available in four different plunger
sizes offering maximum capacities from 1.5 gph at a
maximum pressure of 3000 psig to 220 gph at a maximum
pressure of 150 psig. All models may be duplexed.
The stroking length can be manually adjusted from 0-100%
by using the micrometer control to raise or lower the
internal rate setter slide. The adjustment is independent
of any internal resistance or pressure, thus allowing
effortless manual control. The pump is available in
five stroking speeds. Repetitive accuracy is +1%.
The hydraulic system is open to atmosphere on every
stroke for the venting of air and refill of oil by gravity.
Mechanical type vent and refill valves are not required.
This design means less maintenance, longer life and
Materials of Construction
The Model 1730 can be supplied with Polypropylene,
Ductile Iron, Alloy 20, and 316 Stainless Steel wetted
ends. All diaphragms and seals are available in Nitrile,
Hypalon® or Viton® suited for the most severe
chemical duty applications. Check valves are single
ball cartridge type for easy maintenance. Reversible
seats provide long life and reduce replacement costs.
Special H2SO4 and H2O2 compatible wetted ends are also
stroke length adjustment allows effortless capacity
control of 0-100%
tubular diaphragm withstands higher vacuum for longer
pressure up to 3000 psig
supply - single phase or 3-phase TE or XP motor
hydraulic pressure relief valves
hydraulic vent and refill system
ball cartridge type check valves
reliability and accuracy
Carbide check valves
or pneumatic capacity control
ball checks for higher pressures
valve for low discharge pressure
AC or DC motor speed control by analog input signalin
response to a standard electrical input signal.