EV-1 Metering Pumps

EV-1 is considered the most versatile pump on the market today. It is completely modular and can be engineered with a variety of features and options to meet many different requirements. In addition, the EV-1 can be readily converted in the field with minimal downtime to adapt to your new or changing processing needs.

Designed for general metering duty, including routine chemical, viscous and slurry services, the EV-1 features a sealless, single-flat diaphragm, simplex, duplex or multiplex feeds and a choice of several metallic and non-metallic liquid end cartridge materials.

Operating Specifications

• Flow range: .08 gph (.30 l/h) to 220 gph (833 l/h) with independent flow control for each feed
• Pressure range: to 3500 psig (241 bar)
• Maximum temperatures:
  Metallic to 250°F (121°C)
  Non-metallic to 150°F (66°C)
  
• Steady-state: ± 0.5% of flow setting
• Linearity: ± 1% of full flow
• Repeatability: ± 2% of full flow
• Turn down ratio: 10:1 (optional 100:1)

Options

• Flat double diaphragm with three levels of DURAlert leak detection.
• EV-N Flow pulse-less metering.
• DURAmatic electronic actuation.
• Variable speed drive.

Drivecase Cartridge

• A two-part epoxy-coated, cast-iron drivecase covers the entire hydraulic range.
• Symmetrical design permits one or two feeds and vertical or horizontal mounting.
• Multiplexing allows as many as 12 feeds with one motor.
• Accepts NEMA 56C frame motors to eliminate alignment problems. IEC motor frames are also available.
• Heavy-duty construction delivers strength and durability beyond anything found in its class.

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Hydraulic Cartridge

• Reciprocating plunger design features a 3/4" (19 mm) stroke length and nine interchangeable plunger sizes.
• Field replaceable, three-part plunger seal provides the wear surface between the hydraulic cartridge and the plunger.
• Internal oil filter eliminates any contaminants from entering the pump's hydraulic system.
• Externally adjustable hydraulic relief valve located at the high point of the hydraulic system incorporates an integral air bleed valve in a relief valve poppet to accurately vent air from the pressurized hydraulic system.
• Mechanical refill valve provides excellent suction lift capability. Pumps high vapor liquids without modification to existing systems.

Liquid End Cartridge

• Hydraulically balanced single diaphragm design, without process side contour plate, permits use in almost any service condition.
• Pumping action is developed by positive sealing ball check valves.
• Optional check valve arrangements (double ball, soft or hardened seats) for special applications.
• Check valve assembly may be rebuilt for economical maintenance.
• Standard wet end materials include 316SS, Alloy 20, Hastelloy®, PVC and Kynar®. Most machineable metallic and non-metallic materials are available.

Stroke Adjuster Cartridge

• Fully adjustable from 0% to 100% of stroke length.
• Maximum stroke setting readout in 1% increments.
• Easily converted to DURAmatic electronic actuation.
• Fully sealed to prevent atmospheric contamination or oil leakage.

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