progressive block usage


ZVB Valves are completely hydraulic in operation and will deliver either oil or grease. These Dualine valves are also fully and individually adjustable in regard to discharge quantity and are equipped with operational indicators. Each ZVB valve serves two bearings; however, by a simple method of cross-porting, it will serve one. Therefore, a four valve block, as an example, can actually serve anywhere between four and eight bearings. ZVB valves can be supplied in several basic discharge capacities and are available in blocks consisting of one, two, three or four valves.

Discharge:0.5/1.5/3cc/adjusting by turn
Outlets:1/2/3/4/5/6/7/8 outlets;
Material: Carbon Steel
Surface treatment:Zinc-plate
Working Pressure:40Mpa
Working Pressure:40Mpa

  • metering screw
  • Indicator
  • Switch
P.N Max.Pressure Working Pressure Vol.per Stroke Outlet Note
ZVB-P0.5 40Mpa 1Mpa 0.5mL 1-8 1.With metering screw.2.With motion indicator
ZVB-P1.5 1.5mL 1.With metering screw2.With motion indicator 3. Limit switch adjustment
ZVB-P3.0 3.0mL 1-4 1.With motion indicator

Trouble Shooting for the ZVB(SSPQ) Blocks

The dual line lubrication block does not work.

The dual line lubrication block may fail to work due to several possible reasons. Here are a few common ones:

1. Clogged or Blocked Lines: Over time, the lubricant lines in the dual line lubrication block can become clogged or blocked with dirt, debris, or solidified lubricants. This can obstruct the flow of lubricant and prevent it from reaching the intended lubrication points efficiently.

2. System Leakage: If there are any leaks in the dual line lubrication system, it can result in insufficient lubricant delivery to the machinery. Leaks can occur at joints, fittings, or even within the lubrication block itself. These leaks can reduce the pressure and volume of lubricant reaching the lubrication points, leading to ineffective lubrication.

3. Insufficient or Over-pressurization: The dual line lubrication block relies on a specified pressure range to effectively distribute the lubricant. If the pressure is too low, the lubricant flow may be inadequate to reach all the lubrication points, resulting in poor lubrication. Conversely, if the pressure is too high, it can lead to excessive lubricant flow, causing wastage and potential damage to the machinery.

4. Improper Sizing or Configuration: If the dual line lubrication block is not properly sized or configured for the specific machinery it is intended to lubricate, it can hinder its proper functioning. Inadequate sizing can cause insufficient lubricant flow, while improper configuration can result in incorrect distribution of lubricant across the lubrication points.

5. Lack of Maintenance: Regular maintenance is crucial for ensuring the optimal performance of a dual line lubrication block. If the system is not properly cleaned, inspected, and serviced, it can accumulate dirt, debris, or deteriorated lubricants, leading to blockages and reduced efficiency over time.

To address these issues, it is recommended to perform regular maintenance and inspections, including cleaning or replacing clogged lines, fixing leaks, adjusting pressure settings, and ensuring proper sizing and configuration. Additionally, consulting with a lubrication specialist or technician can provide further guidance on resolving specific problems related to the dual line lubrication block.

The grease leak from the indicator pin

When a grease leak occurs from the indicator pin in a lubrication system, it can indicate a potential issue within the system. Here are some possible causes and explanations for this problem:

1. Excessive Grease Pressure: The indicator pin is designed to release excess grease when the pressure within the lubrication system exceeds a certain threshold. If there is too much grease being pumped into the system or if the pressure settings are too high, it can cause the indicator pin to leak grease. This indicates an imbalance in the system and potential over-lubrication.

2. Blocked or Restricted Pathways: The greased pathway that leads to the indicator pin may become partially or fully obstructed, causing grease to leak. This can happen due to accumulated debris, solidified grease, or even improper installation of components. The blockage prevents the smooth flow of grease, leading to leakage at the weakest point, which is often the indicator pin.

3. Improper Seal or Gasket: The indicator pin assembly typically includes seals or gaskets that help contain the grease within the system. If these seals are damaged, worn out, or not properly installed, they can allow grease to escape through the indicator pin. This can occur due to age, poor maintenance, or using low-quality seals.

4. Mechanical Failure: Sometimes, the indicator pin itself may be faulty or damaged, resulting in grease leakage. Mechanical failure can occur due to wear and tear, corrosion, or excessive force applied to the pin during operation. A damaged indicator pin cannot effectively hold back the grease, leading to leaks.

5. Incorrect Lubricant Consistency: In some cases, the consistency or viscosity of the grease used in the system may not be suitable for the specific application. If the grease is too thin or too thick for the system’s requirements, it can lead to leaks through the indicator pin. It is important to use the recommended grease type and viscosity as specified by the lubrication system manufacturer.

To address a grease leak from the indicator pin, you should first identify the root cause of the issue. This may involve inspecting the pressure settings, checking for blockages in the greasing pathways, examining the seals or gaskets for damage, and assessing the condition of the indicator pin. Addressing the specific problem will require appropriate repairs or replacements, such as adjusting pressure settings, cleaning or clearing blockages, replacing seals or gaskets, or fixing/replacing the indicator pin assembly if necessary. Regular maintenance, including lubrication system inspections, can also help identify and prevent grease leaks.

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