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Buyers HBF4 vent plug, 1/4 NPT, 1-3/8 inch, new condition

Buyers

Buyers HBF4 Vent Plug 1/4 NPT 1-3/8 In

SKU CH-FP58-BAC3N

Ventilates hydraulic tanks with a 40-micron oil-resistant filter to keep fluid clean

  • Filters particles as small as 40 microns for clean fluid
  • Provides free airflow into hydraulic tanks and reservoirs
  • Oil-resistant filter elements protect against dirt and dust
  • Designed for hydraulic fluid, oil, chemical and coolant systems
  • Breather cap fits NPT-threaded openings for secure installation

Hydraulic Reservoir Breather Cap

The Buyers Products HBF4 vent plug threads into a 1/4 NPT opening and acts as a breather for hydraulic tanks, reservoirs and coolant systems. Its oil-resistant filter elements stop dirt and dust particles as small as 40 microns while allowing clean air to enter freely. The unit is sold new and intended for machinery and machine-shop fluid circuits.

1/4 NPT Thread Limit

The plug fits only a 1/4 NPT port; it will not seal larger or smaller NPT sizes in the 1/8 in. to 1 in. range mentioned by the manufacturer. Flow capacity is governed by the filter media and the single port size, so systems requiring higher air throughput may need a larger breather. No other interface or thread standard is supported.

Verify Port And Filtration Needs

Confirm that your reservoir or tank has a female 1/4 NPT thread before ordering. Check that 40-micron filtration meets the cleanliness specification of your hydraulic fluid, oil or coolant. Ensure the single vent location provides adequate pressure equalisation for the total fluid volume in your system.

Highlights

  • Filters particles as small as 40 microns for clean fluid
  • Provides free airflow into hydraulic tanks and reservoirs
  • Oil-resistant filter elements protect against dirt and dust
  • Designed for hydraulic fluid, oil, chemical and coolant systems
  • Breather cap fits NPT-threaded openings for secure installation

Specifications

BrandBUYERS PRODUCTS

Questions about this item

Should I choose the 1/4 NPT version for my hydraulic tank?

Select the 1/4 NPT size when your reservoir port matches that thread; the range spans from 1/8 in. NPT up to 1 in. NPT so verify your port before ordering.

What does the 40 micron filter rating mean once installed?

The oil-resistant elements block dirt and dust particles as small as 40 microns while allowing clean air to enter the hydraulic fluid reservoir.

How does the NPT thread standard affect the seal in practice?

The 1/4 NPT tapered thread creates a pressure-tight seal when tightened into a matching port preventing leaks in hydraulic oil chemical or coolant tanks.

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