Resistance Oil Distributors DGA

lubrication oil distributor lubricating grease dispenser injector DGA

Features

Simple Structure: They are generally simpler in design and construction compared to detect volume oil distributors, often leading to lower manufacturing costs.
Cost-Effective: Due to their simpler design, they are typically more economical to purchase and install.
Continuous Flow: Unlike progressive feeders which dispense fixed volumes per stroke, resistance distributors provide a continuous, albeit restricted, flow of oil as long as pressure is maintained in the main line.
Pressure Dependent: The actual volume of oil delivered can vary with changes in lubricant viscosity (due to temperature fluctuations), system pressure, and back pressure at the lubrication point. This makes them less precise than positive displacement systems, especially in applications requiring very accurate metering.
Viscosity Sensitivity: Highly sensitive to changes in oil viscosity. A change in temperature can significantly alter the flow rate.
Filter Requirement: Requires clean oil to prevent clogging of the small orifices, making an effective filtration system crucial.
Typically for Oil: Primarily designed for oil lubrication due to the difficulty of accurately controlling the flow of grease through a simple resistance element.

Overview

The single-line resistance oil distributor, often simply called a single-line metering valve or a restrictor, is a common component in single-line lubrication systems, primarily used for oil lubrication. Unlike detect columetric oil distributor that operate on a positive displacement principle, resistance distributors control the flow of lubricant based on flow resistance.

The single-line resistance oil distributor operates on a simpler principle compared to detect volumetric oil distributor. It typically consists of a small orifice or a capillary tube designed to create resistance to the flow of oil.

When the lubrication pump in a single-line system starts, it delivers oil under pressure through a main supply line.The oil then flows through the resistance distributor. As the oil passes through the narrow passage or orifice within the distributor, it encounters resistance, which causes a pressure drop.

The size of the orifice or the length and diameter of the capillary tube determines the amount of resistance and, consequently, the volume of oil that flows through to the lubrication point over a given time. A smaller orifice or a longer, narrower capillary will provide higher resistance and deliver less oil.All resistance distributors connected to the main line receive oil simultaneously.

The distribution of oil among different points depends on the pressure available in the main line and the individual resistance of each distributor.