Load Holding Cartridge Valves

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Product details

Load Holding Cartridge Valves

Product Overview

Load Holding Cartridge Valves are reliable safety‑type Hydraulic valve. As a specialized CARTRIDGE VALVE, it maintains stable pressure and prevents unintended movement inside the hydraulic system. It securely holds the load position of actuators on the Machine, avoiding free falling or drifting caused by oil leakage. This insert‑style CARTRIDGE VALVE can be directly fitted into manifold blocks, reducing pipe joints, saving installation space and minimizing potential leakage points.

Technical Specifications

- Product Name: Load Holding Cartridge Valves

- Category: Hydraulic valve, CARTRIDGE VALVE

- Working Medium: Mineral‑based hydraulic oil

- Working Pressure: Matches high‑pressure requirements of mobile and industrial equipment

- Mounting Method: Cartridge installation into valve manifold

- Operating Temperature: ‑20℃ ~ +80℃

- Main Functions: Load retention, anti‑drift protection, load safety locking

- Internal Structure: Poppet‑type sealing cartridge insert

Working Principle

This Hydraulic valve adopts precision poppet sealing structure inside the CARTRIDGE VALVE. When the control oil port has no pilot pressure, the poppet stays tightly closed, blocking oil return flow in the hydraulic system. It locks hydraulic cylinders and motors of the Machine firmly in position even under heavy external load.

When pilot control pressure is supplied, the pilot oil pushes open the poppet, allowing normal oil flow for actuator movement. Once pilot pressure disappears, the spring forces the poppet back to sealing position instantly. The cartridge integrated design eliminates complicated external pipeline connections, delivering zero‑drift load‑locking performance.

Key Advantages

1. Standard CARTRIDGE VALVE compact structure, easy embedding into manifold blocks, streamlines overall layout of the hydraulic system.

2. Superior poppet‑type zero‑leak sealing, effectively prevents position drifting for loaded parts of the Machine.

3. Quick pilot response, stable locking performance under heavy‑load working conditions.

4. Convenient maintenance: only replace cartridge insert without complete manifold disassembly.

5. Strong resistance to oil contamination, suitable for severe operating conditions of engineering machinery.

Application Scope

This critical safety Hydraulic valve is widely installed within the hydraulic system of various Machine: cranes, excavators, aerial work platforms, loaders, agricultural machinery, material‑handling equipment and industrial hydraulic power units. Typical application circuits: boom cylinder load holding, lifting‑component anti‑fall protection, clamping cylinder position locking, safety‑holding loop for tilt and swing mechanisms.

adiffer-load-holding-cartridge-valves-2026-08-14

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