Neptune Pumps

Diaphragm metering Pumps from Neptune Chemical Pump Co., Inc. come with Neptune’s innovative design, quality workmanship and long-term reliability. Click on the models to visit some of the common Diaphragm Metering Pumps. Call for custom configurations.

Metering Pumps – Series 500 “dia-Pump”

Neptune Hydraullically Actuated “dia-Pumps”Variable Oil By-passT stroke adjustment allows better valve performance than variable linkage designs. The valve checks have extra time to seat even in heavy liquids since they are idle during the by-pass portion of the suction and discharge strokes.

EZE-CLEANT Valves-Cartridges can be removed for cleaning without disturbing the piping to the pump. All Neptune “dia-Pumps” are adjustable from 10% through 100% of capacity by micrometer dial.

Neptune “dia-Pumps” are available in the following materials of construction:

  • Cast Iron with 316SS Trim
  • 316SS
  • PVC
  • Alloy 20
  • Kynar

Electronic Stroke Control

The Neptune Electric Stroke Control allows the capacity of any Neptune Series 500 or Series 600 “dia-PUMP” to be automatically controlled in response to a standard 4-20 mA process signal. Also accepts 0-5 VDC/0-10 VDC signal or digital pulse train inputs. One-piece controller- positioner mounts directly to the pump. No machining or any special drillings or tappings needed to retrofit pump. Ideal for water/wastewater, power and process industry applications…anywhere that pump flow must be automatically proportioned or varied.

  • Stroke position indicator on controller. (Also on optional remote control module.) Permits fast, easy visual check of pump stroke length.
  • Remote control unit (optional). Allows manual override and monitoring from remote location.
  • Switch reversible. Allows direct or indirect response to signal.
  • Separate signal and power entrance connections to terminal blocks.
  • Adjustable ratio. Great control flexibility.
  • Signal interruption “memory.” If process signal is lost, unit can remain in its last position or move to a preset position.
  • Adjustable travel time: 15 seconds minimum
  • Input signal optically isolated from the line voltage. Eliminates inexact positioning which could be caused by extraneous electrical interference.
  • Alarm function relay monitors: 1) movement to max/min preset limits; 2) movement to adjustable upper/lower limits. Gives early warning to malfunctions or process upsets, allows for quick corrective actions.

Low Volume Pumps

Special Application PumpNeptune Model 481-S and 501-S hydraulic diaphragm metering pumps are built to deliver very low flows, repeatable and accurate ranging down to quarts per day. Discharge pressures are higher than are possible with mechanical diaphragm pumps. Explosion-proof models are available for use in hazardous atmospheres.

These pumps are especially popular in oil/gas production, oil recovery and refineries. Typical applications include the injection of antifoam agents, corrosion inhibitors and other additives injected at very low volumes but high pressures. (Refer to curves on reverse side.) These pumps are also used for neat feeding of boiler chemicals.

Design Features/ Benefits

  • High discharge pressures, to 3000 psi (210 kg/cm 2 ) Exceeds limits of most small pumps, ideal for high pressure systems
  • EZE-CLEANT valves — Cartridges can be removed for cleaning without disturbing piping
  • Pneumatic and electric stroke-length control available — automatic capacity control in response to standard 4-20 mA process signal (variable speed drives may not be used with Models 481 or 501 due to low stroking speed)
  • Explosion-proof motors available — suitable for use in hazardous atmospheres
  • Low flow-rates-quarts/day — accurate, reliable chemical feed

E Series “dia-Pump”

Economy Diaphragm PumpSeries 500-E offers an economical alternate to the standard Series 500 “dia-PUMP” or an opportunity to “step-up” from packed plunger pumps to a true hydraulic diaphragm pump at a modest cost increment.

Features

  • Capacity to 18 gph (68 lph); Pressure to 1100 psi (77 kg/cm 2 )
  • Available liquid end materials: Cast Iron, 316SS, PVC, Kynar┬«
  • Variable Oil By-passT stroke adjustment allows improved valve performance over variable linkage designs.

High Viscosity “V-Pumps”

PurposeNeptune high viscosity, flat diaphragm “V-Pumps” are designed to accurately meter viscous fluids up to 5000 cP such as polymers and other thick liquids.

Features/Benefits

  • Handles moderate viscosity fluids.
  • Standard flat diaphragm.
  • Large internal porting with a large, single ball, suction check valve.
  • Capacities to 30 gph (113 lph) at 100 psi (8 kg/cm 2 ).
  • Available in all 316SS with SS trim.
  • Electric or pneumatic stroke control options and variable speed drives.
  • Variable Oil By-passT stroke adjustment mechanism provides better valve performance than variable linkage designs.
  • Teflon┬« diaphragm withstands most chemicals.

Variable Oil By-passT stroke adjustment allows an adjustable time delay between the end of the suction stroke and the beginning of the discharge stroke. This delay permits the ball to seat fully before pumping resumes, even in the heaviest liquids, so that pumping accuracy remains high.


Tubular Diaphragm Pumps

Special Application PumpsNeptune Series 500 tubular diaphragm pumps are engineered for viscous fluids up to 20,000 cP and for medium slurries up to 10% solids.

Features/Benefits

  • No-clog design. Straight-thru flow pattern eliminates pockets where slurries can settle.
  • Easily handles high viscosity liquids.
  • Double diaphragm is standard.
  • Capacities to 80 gph (302 lph).
  • Control options include electric or pneumatic stroke control and variable speed drives.
  • Standard units with double ball suction and discharge valves. Single ball suction valve is optional.
  • Variable Oil By-passT stroke adjustment mechanism provides better valve performance than variable linkage designs.

Series 600 “dia-Pumps”

Features/Benefits

  • Capacities to 160 gph (605lph)
  • Pressures to 3500 psi (245kg/cm2)
  • Accepts standard 56C motor.
  • Pump capacity is adjustable by micrometer dial while pump is running or stopped.
  • Capacity Control Options: Pneumatic and electric positioners or variable speed drives are available for automatic capacity control.
  • EZE-CLEANT valves are removable without disturbing piping.
  • Variable Oil By-passT stroke adjustment allows improved valve performance over variable linkage designs.

Series 7000 Mechanical “dia-Pumps”

PurposeThe Neptune Series 7000 “dia-PUMP” is a mechanically actuated diaphragm metering pump designed for water, wastewater and process applications.

FeaturesThe mechanical design eliminates the use of contour plates on the liquid side of the diaphragm. The simple, straight through valve and head design allows improved flow characteristics.

  • Self-priming
  • Superior performance when pumping chemicals such as sodium hypochlorite, which can off-gas
  • Suction lift exceeding 20 ft. on water-like chemicals
  • Easily handles viscosities in excess of 5000 cps
  • Maximum capacities range from 15 gph to 300 gph at 150 psi, depending on model
  • PVC, Kynar, and 316SS liquid ends available

Series 8000 “dia-Pumps”

PurposeThe Neptune Series 8000 “dia-PUMP” is a hydraulically- actuated diaphragm pump designed for high volume metering applications such as regeneration, pretreatment and waste treatment. Both simplex and duplex models are available.

FeaturesThe mechanical design eliminates the use of contour plates on the liquid side of the diaphragm. The simple, straight through valve and head design allows improved flow characteristics.

  • Suction and discharge valves can be removed for cleaning without disconnecting the piping.
  • Pump capacity is adjustable by micrometer dial.
  • Electric positioners or variable speed drives are available for automatic capacity control.
  • Capacities to 350 gph simplex; 700 gph duplex. Pressures to 100 psi.
  • All moving parts of the Series 8000 “dia-PUMP” run submerged in oil for extended service.
  • Hydraulic flexing and balance of diaphragm eliminates diaphragm stress.
  • The Series 8000 “dia-PUMP” needs no packing, thereby eliminating packing leakage and the resulting maintenance.