Special Solutions


OM Pumps – Magnesium oxide slurry dosing

These are designed for dosing diluted MAGNESIUM OXIDE slurry into diesel. Working with the manufacturers of the magnesium oxide slurry, since 1980 the OM pump has been specifically designed with special wetted materials for this application. It is available with both spring and positive return mechanism (flow rates up to 68 litres per hour, 18 GPH and operating pressures up to 50 bar g, 725 PSI g).


MHBN/MHCN Pumps – Filter aid (kieselgur) Dosing

Process used to clarify wine prior to bottling. This process removes yeast cells and other particles by passing the wine through a filter that is small enough to remove undesired elements including yeast cells, yet large enough not to trap the molecules of aroma, flavor and tannin. The filter aid for this type of process is called Kieselguhr, a diatomaceous earth (diatomite) it’s a form of silica composed of the siliceous shells of unicellular aquatic plants of microscopic size. This filter aid mixed into either wine or beer is dosed by an OBL pump counter current to the main flow (centrifugal pump). This filter aid is particularly abrasive and needs both special pump design as well as special materials. OBL, in cooperation with the Italian leading manufacturer of these filters developed a complete line of pumps (H series), with, plunger, mechanical diaphragm and even hydraulic diaphragm pumps with max capacity up to 420 LPH (110 GPH) and pressure up to 15 bar g (200 PSI g).


HV Pumps – High Viscosity Dosing

Specifically designed to handle high VISCOSITY PRODUCTS, the HV pumps are available in packed plunger version only with either spring or positive return mechanisms. These pumps are capable of handling products with a viscosity up to 55,000 cP with each head capable of achieving flow rates of up to 150 l/h (40 GPH).


CN Pumps – Microdosing

These pumps are designed to handle EXTREMELY LOW FLOW RATES where continuous dosing is required. These packed plunger pumps are able to control down to addition levels of 15 ml/h (0.04 GPH) at a maximum pressure of 40 bar g (600 PSI g) due to the unique OLB packed plunger design and the use of exotic materials for valve components.


Condensate dosing (low NPSH available applications)

In the industrial power plants condensate has to be analyzed to record the concentration of both salts and ammonia in the turbine. Condensate has an NPSH available as low as 1 meter. OBL has designed a series of packed plunger metering pumps with full motion, NP series (according to API 675 STD guidelines) meeting such extreme suction conditions (flow rates up to 100 LPH, 26 GPH)

High Temperature

Distillation Column Process (any high temperature, up to 280 °C operating duty)

Fractional distillation is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which several fractions of the compound will evaporate. Distillation is the most common form of separation technology used in petroleum refineries, petrochemical and chemical plants , natural gas processing. By increasing the temperature of the product inside the columns, the different hydrocarbons are separated. The “lightest” products (those with the lowest boiling point) exit from the top of the columns and the “heaviest” products (those with the highest boiling point) exit from the bottom of the column.

The bottoms product is pumped out of the distillation column to a product storage facility.

OBL has designed pumps capable of operating up to 280 °C, coping with extremely low NPSH a values (as low as 2 metres) with both packed plunger as well as hydraulic diaphragm design.

  • Packed plunger TLF series, designed according to API 675 STD guidelines, with large cooling jacket and special plunger packing material to stand such high operating temperature.
  • Hydraulic diaphragm MMXAAHT series; this is a unique pump, as all OBL’s competitor use remote heads; however, even with remote heads the hydraulic oil (basically used for the swept volume only) goes off and loses its lubricating properties and MUST be replaced. OBL designed and realized a pump with metallic diaphragm and an internal hydraulic oil cooling systems that offers the following advantages Vs plunger pumps and remote head hydraulic diaphragm pumps:
  1. Leak free operation (Vs plunger pump)
  2. Built-in relief valve (Vs plunger pump)
  3. Hydraulic oil never goes beyond its max temperature for a long time and therefore lasts much longer than in a remote head design (Vs remote heads pumps
  4. Pumped chemical never changes its temperature (when constant temperature is a must)
  5. Compact design (Vs remote heads)