PAF Series Pre‑pressure Air Filter

PAF Series Pre‑pressure Air Filter

2 week ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

PAF Series Pre‑pressure Air Filter

Product Overview

PAF Series Pre‑pressure Air Filter is a specialized tank‑mounted FILTER for industrial hydraulic system and hydraulic‑driven Machine. Mounted on the top of hydraulic oil reservoir, this breather FILTER integrates pre‑pressure valve and filtration function. It not only filters incoming air to block dust and impurities, but also maintains slight positive pressure inside the oil tank, which is a key protection component for the hydraulic system and working Machine.

This FILTER can prevent external dust, moisture and pollutants from entering the tank while keeping stable internal tank pressure. It avoids oil suction‑cavitation damage to hydraulic pumps, reduces oil oxidation risk, and extends service life of core parts inside the hydraulic system, lowering failure rate of the whole Machine. Multiple models are available to adapt to different tank capacities of various hydraulic system.

Technical Specifications

‑ Model: PAF Series Pre‑pressure Air Filter

‑ Product Type: Pre‑pressure hydraulic tank breather FILTER

‑ Application: Air filtration & pre‑pressure maintaining for oil reservoir of hydraulic system and industrial Machine

‑ Filter element material: Polyester non‑woven fabric

‑ Filtration precision: 10‑20μm

‑ Pre‑pressure setting: 0.02‑0.05MPa (built‑in pressure‑regulating valve)

‑ Working temperature: -20℃ ~ +80℃

‑ Working medium: Anti‑wear hydraulic mineral oil

‑ Installation: Threaded mounting on hydraulic tank top

‑ Key Features: Built‑in pre‑pressure valve, high‑efficiency dust filtration, good air permeability, replaceable filter element, stable protection for hydraulic system and operating Machine

Working Principle

When the Machine is in operation, the oil level of hydraulic tank fluctuates with the working cycle of the hydraulic system. The PAF pre‑pressure air FILTER keeps a slight positive pressure inside the tank via the built‑in pressure‑regulating valve.

When oil level drops, outside air passes through the FILTER element, dust and solid contaminants are intercepted before air enters the reservoir. When oil level rises, excess internal air is vented out through the breather. The pre‑pressure structure prevents negative vacuum pressure inside the tank, which effectively avoids pump cavitation and air‑entrainment inside the hydraulic system.

The filter element is a consumable part. Users only need to replace the inner filter element instead of the whole FILTER, to retain filtration and pre‑pressure performance of the hydraulic system, and cut maintenance cost of the Machine.

Core Advantages

1. Dual‑function FILTER: combines air filtration and pre‑pressure maintaining, prevents dust pollution and tank vacuum, protects the hydraulic system and host Machine.

2. Built‑in pre‑pressure valve, maintains stable micro‑positive pressure inside oil tank, greatly reduces cavitation risk of hydraulic pump.

3. Reliable filtration performance, blocks dust and moisture, keeps hydraulic oil clean for long‑time running of the Machine.

4. Compact structure, easy installation, convenient filter‑element replacement, reduces downtime of the hydraulic system.

5. Wide compatibility, suitable for new assembly or retrofit of various hydraulic system, ideal for hydraulic power packs, heavy‑duty hydraulic equipment.

Application Range

PAF Series Pre‑pressure Air Filter is widely applied to the hydraulic system of hydraulic power packs, injection molding machines, hydraulic presses, machine tools and other hydraulic‑driven Machine. It is popular among hydraulic system manufacturers, maintenance workshops and global spare‑parts distributors.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch , hydraulic system

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