End-Of-Line Switch 2215200

Features

• Pressure control via over-pressure inverter.
• Pressure control with adjustable spring.
• The switching mechanism is built in a robust steel housing.

Description

The end-of-line controls are very important devices in a dual-line grease or air/oil system because they are the only component capable of detecting the correct operation of the pump and/or the circuit tubing and piping.

Principle of operation and design

The end-of-line switch is directly linked to the proper operation of the lubrication cycle in a dual-line system.

A lubrication cycle consists of the following operating sequence: the pump sends lubricant to line 1 once the main line-selection electro-valve shifts, since both lines are connected to the end-of-line switch this device will ultimately get part of the lubricant. Once the pressure at the end-of-line switch overcomes the spring (A) force, piston (B) moves and enables the proximity switch (C); which in terms sends a signal to the main control panel to shift the main line-selection electro-valve to send lubricant through line 2. Line 1 then starts de- pressurizing and the lubricating cycle starts on line 2. The link (D) starts moving in the other direction until the piston

(E) enables the proximity switch (F) and the control panel then starts the pre-programmed pause timer.

The end-of-line  switch  allows  sending  an  alarm  or

stopping the equipment when the pressure differential between the two lines is lower than 50 kg/cm² (711 psi).

The spring (A) allows pressure to be regulated generally from 20 to 100bar depending on secondary tubing length between dosing unit and lubrication point, as well as grease hardness and room temperature

Installation

For proper operation of a dual-line grease or air/oil system, the end-of-line pressure swtich needs to be installed at the end of line, before the last grease or air/oil block. This insures that there is always grease or oil passingthrough the end-of-line switch.

Specifications