Side-ported double pilot operated check valves – precision hydraulic locks

Side-ported double pilot operated check valves are advanced control components designed to ensure maximum safety in power hydraulic systems. Their design allows for double-sided blocking of oil flow in cylinders, which prevents unwanted piston rod movement in the event of a pressure drop or supply line leakage. Thanks to the side location of the pilot ports, these valves offer significantly greater mounting flexibility in machines with limited installation space. They are components with high internal tightness that guarantee load immobilization in a given position, which is critical for operator safety and the integrity of machines using hydraulic pumps of various capacities.

Technical characteristics and side mounting

A key feature of side-operated valves is the possibility of direct integration with the working ports of the cylinders, which shortens the medium's flow path and increases the system's stiffness. These components operate at nominal pressures reaching 350 bar, and their bodies are made of materials resistant to material fatigue – steel or ductile iron. Precise control of the valve poppets is carried out using a pilot signal, which allows for smooth operation of the receiver. Due to the high responsibility of these elements, it is recommended to use high-quality oils, the cleanliness of which should be maintained using appropriate hydraulic filters. Such a configuration ensures long trouble-free operation of the valve seats and eliminates the risk of premature wear of internal mechanisms.

Why use side-operated valves?

• Space optimization: Side output of pilot ports allows mounting of valves in places where access from the top is impossible or difficult.
• Work safety: Mechanical locking of the cylinder in every working position eliminates the risk of heavy machine components falling.
• Ease of integration: These valves work perfectly with a wide range of hydraulic hoses, enabling the quick creation of a tight and efficient connection in the system.

Frequently Asked Questions (FAQ)

Does a side-operated valve work the same as a standard plate-mounted one?

The hydraulic operating principle is identical, however, the version with side ports offers greater freedom in designing the system piping, which is crucial in tight machine compartments.

How to choose the valve diameter for the oil flow?

Selection is based on the permissible flow velocity in the lines. Large pressure drops should be avoided, so the valve size should be selected according to the maximum pump output in a given section.

Is valve damage easily noticeable?

The most common symptom of failure is cylinder creep under load. If the cylinder piston seals are functional and drifting still occurs, a leak inspection of the seats inside the lock should be performed.