piston metering pump

piston metering pump with integral eccentric mechanism

Piston metering pump is a reciprocating displacement pump with piston drive at the overflow end and adjustable flow rate, which is suitable for precise metering and transportation of various special media such as high pressure, high temperature, low temperature, high viscosity and high solid content.

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Description

The motor drives the worm gear and drives the adjustable eccentric mechanism so that the connecting rod drives the plunger to do reciprocating motion. The hydraulic end of the pump forms a volumetric chamber using the plunger’s reciprocating motion, enabling suction and discharge of the medium through the alternating opening and closing of the inlet and outlet check valves.

piston metering pump Technical parameters:

  • Maximum flow rate of single head ≤ 14300 L/H, maximum pressure ≤ 50 MPa.
  • Single-head flow: Qmax = 230 L/H
  • Pressure range: Pmax = 40 MPa
  • Standard configuration: material 304, 316, 380V/50Hz
  • Optional configuration: material 316L, 904, 2205, TA, Hastelloy C, etc., motor frequency conversion/explosion-proof, special voltage/frequency

piston metering pump Main features:

  1. Wide applicability: suitable for various flow and pressure requirements, high metering accuracy, simple structure, easy maintenance, cost-effective.
  2. Plunger size: generally φ6-200 mm, strong flexibility.
  3. High-precision valve group: equipped with high-precision import and export check valves, strong sealing performance, able to withstand high pressure, ensuring measurement accuracy.
  4. Wearing parts: the shaft sealing system composed of plunger and packing may leak, packing preload needs regular adjustment.
  5. Customized features: can be customized for high/low temperature, high viscosity, solid content, and special media.
  6. Safety recommendations: no built-in safety relief device, recommended to install a safety valve at pump outlet.
  7. Parallel configuration: supports double/multiple heads to increase flow, reduce pulse, and transport different media as a proportional pump.
  8. Automation control: can be equipped with metering pump stroke controller for wider automation control.

piston metering pump Advantages:

  1. High adjustment accuracy: integral adjustable eccentric mechanism, 0-100% stepless adjustment, stability and linearity accuracy up to ±1%.
  2. Durability: full ceramic and sprayed ceramic plunger, high hardness, strong corrosion resistance, excellent surface finish, extended service life.
  3. Superior sealing performance: packing seal assembly and ceramic plunger improve self-sealing, reduce maintenance costs.
  4. Valve options: provides ball, stacked valve, angle valve, etc. Valve seat usable on both sides, lowers cost and improves maintenance.
  5. Customized temperature control: hydraulic end can be customized with heating, cooling, or insulation functions for wider temperature adaptation.

piston metering pump Application:

Despite the risk of leakage, plunger metering pumps are widely used in chemical, oil and gas, electric power, pharmaceutical, metallurgy, paper and other industries due to their high cost performance, wide applicability, and convenient maintenance.