DMM Valves

A range of line mounted, adjustable metering units for use with dual-line lubrication systems, whereby pressurization of either line discharges a fixed volume of lubricant to the lubrication point.

BENEFITS

• Metering units can be supplied with one to four independent operating sections.
• One single discharge connection for each operating section so that the discharge to each bearing can be individually adjusted.
• Positive hydraulic operation.
• Visual indicator showing operation.
• Five discharge ranges.
• Stepless wide adjustment within each range to provide bearing with its ideal lubricant injection volume.

OPERATION

1. With the reversing valve on the pump set to direct flow into the upper supply line, pressurized lubricant entering the valve forces the inlet piston down. This allows pressure to be applied to the top of the main discharge piston which, then begins to move downwards.

2. Maintained pump pressure on the supply line forces this main discharge piston to the lowest point of its travel and the valve complete its operation in one direction, delivering the measured charge to the bearing. Further application of pressure to the upper supply line will have no effect.

3. When the reversing valve on the pump changes over to direct the pump flow to the lower supply line, pressurized lubricant entering the valve forces the inlet piston up, allowing pump pressure to be applied to the bottom of the discharge piston. The discharge piston begins to move up.

4. Maintained pump pressure on the supply line forces this main discharge piston to the uppermost point of its travel, and the valve completes its operation in another direction, delivering the second measured charge to the bearing. Further application of pressure to the lower supply line will have no effect.

Technical Data