Bowey EF Series Hydraulic Tank Air Breather Filter
Bowey EF series hydraulic tank air breather filter is a core standard accessory specially designed for industrial hydraulic reservoir systems. Manufactured in strict accordance with international hydraulic system accessory standards, this metal-type breather filter integrates professional ventilation, air filtration and hydraulic oil filling functions, serving as an essential protective component for hydraulic equipment operation. Featuring a 2-in-1 integrated structure of air breather and oil filler cap, the EF series solves two key pain points of hydraulic tanks: real-time pressure balance during hydraulic oil volume changes and effective purification of intake and exhaust air. It eliminates the need for an independent oil filling port, simplifies the overall structural design of hydraulic equipment, and effectively improves the integration and aesthetics of the tank. With sturdy metal construction and stable performance, the EF breather filter is a preferred replacement part for heavy-duty and harsh working condition hydraulic systems worldwide.
Working Principle & Core Function
During continuous operation of hydraulic machinery, factors such as telescopic movement of hydraulic cylinders, temperature fluctuation of circulating hydraulic oil, and system power circulation will cause constant changes in the oil volume inside the hydraulic tank. This dynamic volume change inevitably generates positive and negative pressure differences inside the closed reservoir, which will affect the operating stability of the hydraulic system if not eliminated in time.
Bowey EF series air breather filter acts as the "respiratory system" of the hydraulic tank. When the oil level drops and negative pressure is formed inside the tank, external air passes through the high-precision built-in metal wire mesh to enter the tank smoothly; when the oil level rises and internal pressure accumulates, excess air and tiny oil vapor are discharged outward. The dense and uniform filter mesh effectively intercepts airborne dust, sand particles, metal debris and other contaminants, ensuring that only clean air enters the hydraulic system and avoiding oil pollution from external impurities.
In addition to the core ventilation and filtration functions, the top cover of the EF filter can be opened directly for fast and convenient hydraulic oil refueling. The integrated dual-function design perfectly realizes one-piece use of tank breathing and oil injection, greatly improving the convenience of daily equipment maintenance.
Complete Technical Specifications
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Item
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Specification
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Product Series
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EF Series Air Breather
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Core Function
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Tank pressure balance, air filtration, hydraulic oil filling
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Cap & Base Material
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Chrome-plated metal
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Filter Material
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Stainless steel wire mesh
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Sealing Material
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NBR oil-resistant rubber gasket
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Mounting Method
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Standard flange fixed installation
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Applicable Medium
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Industrial hydraulic oil, lubricating oil
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Why a High-Quality EF Breather Filter Is Indispensable for Hydraulic Systems?
Most users tend to ignore small auxiliary accessories such as tank breathers, but they are the key to ensuring the long-term stable operation of the entire hydraulic system. A failed, blocked or low-quality breather filter will directly trigger a series of equipment faults:
• Unbalanced internal and external pressure of the tank, causing tank suction deformation or bulge damage
• External dust, moisture and impurities invade the tank, leading to hydraulic oil deterioration, emulsification and pollution
• Polluted oil causes hydraulic valve blockage, pump body wear, reduced system precision and slow response
• Frequent equipment failures, increased downtime maintenance costs, and shortened service life of the entire hydraulic system
Equipping hydraulic equipment with BOWEY high-quality EF series metal breather filters can effectively isolate external pollution, balance tank pressure, maintain hydraulic oil cleanliness, stabilize system operation, and greatly reduce equipment failure rate and later maintenance costs.
FAQ
Q1: What is the advantage of air breather filter over ordinary plastic breathers?
A: Bowey air breather filter adopts metal chrome-plated structure, which has higher hardness, better anti-rust, anti-corrosion and high-temperature resistance. It is not easy to age and damage in outdoor, high-temperature, dusty and vibrating harsh environments, with far longer service life than ordinary plastic breathers, and is more suitable for industrial heavy-duty scenarios.
Q2: Is the air breather filter easy to install and replace?
A: Absolutely. Bowey air breather filter adopt international standard flange mounting size, which is fully compatible with mainstream hydraulic tanks. It supports direct plug-and-play replacement without any cutting, drilling or modification, saving installation time and labor cost.
Q3: How often should the air breather filter be replaced?
A: The replacement cycle depends on the working environment. For clean indoor hydraulic workshops, replacement every 6-12 months is recommended; for harsh environments such as outdoor construction, mining and high-temperature workshops, it is recommended to replace every 3–6 months to ensure optimal ventilation and filtration performance.
Extended Model
EF1‑25，EF2‑32，EF3‑40，EF4‑50，EF5‑65，EF6‑80，EF7‑100，EF8‑120
